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Karabagias VK, Giannakas AE, Andritsos ND, Moschovas D, Karydis-Messinis A, Leontiou A, Avgeropoulos A, Zafeiropoulos NE, Proestos C, Salmas CE. Νovel Polylactic Acid/Tetraethyl Citrate Self-Healable Active Packaging Films Applied to Pork Fillets' Shelf-Life Extension. Polymers (Basel) 2024; 16:1130. [PMID: 38675048 PMCID: PMC11054538 DOI: 10.3390/polym16081130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 04/12/2024] [Accepted: 04/15/2024] [Indexed: 04/28/2024] Open
Abstract
Nowadays, increased food safety and decreased food waste are two of the major global interests. Self-healable active packaging materials are an attractive option to achieve such targets. This property is critical for the hygiene and the consumption appropriateness of the food. Polylactic acid is a very promising polymeric matrix that potentially could replace the widely used low-density polyethylene due to its biobased origin and its easy biodegradable nature. The main drawback of this polymeric matrix is its brittle, fragile nature. On the other hand, tetraethyl citrate is a biobased approved food additive which became an attractive option as a plasticizer for industries seeking alternative materials to replace the traditional petrochemically derived compounds. A novel biobased film exhibiting self-healing behavior suitable for food-active packaging was developed during this study. Polylactic acid's brittleness was reduced drastically by incorporating tetraethyl citrate, and a random cut on the original self-repairing film was fully healed after 120 s. The optimum concentration of tetraethyl citrate in the polylactic acid was around 15% v/w with a water/oxygen barrier close to the relevant of polylactic acid and low migration. According to the EC50 parameter, the antioxidant activity was 300% higher than the relevant of pure polylactic acid, while according to the thiobarbituric acid and heme iron parameters, the film resisted lipid oxidation and deterioration. Finally, the total viable count parameter indicates the strong antimicrobial activity of this sample.
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Affiliation(s)
- Vassilios K. Karabagias
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece; (V.K.K.); (N.D.A.); (A.L.)
| | - Aris E. Giannakas
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece; (V.K.K.); (N.D.A.); (A.L.)
| | - Nikolaos D. Andritsos
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece; (V.K.K.); (N.D.A.); (A.L.)
| | - Dimitrios Moschovas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (A.K.-M.); (A.A.); (N.E.Z.)
| | - Andreas Karydis-Messinis
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (A.K.-M.); (A.A.); (N.E.Z.)
| | - Areti Leontiou
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece; (V.K.K.); (N.D.A.); (A.L.)
| | - Apostolos Avgeropoulos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (A.K.-M.); (A.A.); (N.E.Z.)
| | - Nikolaos E. Zafeiropoulos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (A.K.-M.); (A.A.); (N.E.Z.)
| | - Charalampos Proestos
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Zografou, 15771 Athens, Greece;
| | - Constantinos E. Salmas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (A.K.-M.); (A.A.); (N.E.Z.)
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Karydis-Messinis A, Kyriakaki C, Triantafyllou E, Tsirka K, Gioti C, Gkikas D, Nesseris K, Exarchos DA, Farmaki S, Giannakas AE, Salmas CE, Matikas TE, Moschovas D, Avgeropoulos A. Development and Physicochemical Characterization of Edible Chitosan-Casein Hydrogel Membranes for Potential Use in Food Packaging. Gels 2024; 10:254. [PMID: 38667673 PMCID: PMC11049393 DOI: 10.3390/gels10040254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/04/2024] [Accepted: 04/05/2024] [Indexed: 04/28/2024] Open
Abstract
The increasing global concern over plastic waste and its environmental impact has led to a growing interest in the development of sustainable packaging alternatives. This study focuses on the innovative use of expired dairy products as a potential resource for producing edible packaging materials. Expired milk and yogurt were selected as the primary raw materials due to their protein and carbohydrate content. The extracted casein was combined with various concentrations of chitosan, glycerol, and squid ink, leading to the studied samples. Chitosan was chosen due to its appealing characteristics, including biodegradability, and film-forming properties, and casein was utilized for its superior barrier and film-forming properties, as well as its biodegradability and non-toxic nature. Glycerol was used to further improve the flexibility of the materials. The prepared hydrogels were characterized using various instrumental methods, and the findings reveal that the expired dairy-based edible packaging materials exhibited promising mechanical properties comparable to conventional plastic packaging and improved barrier properties with zero-oxygen permeability of the hydrogel membranes, indicating that these materials have the potential to effectively protect food products from external factors that could compromise quality and shelf life.
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Affiliation(s)
- Andreas Karydis-Messinis
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (C.K.); (E.T.); (K.T.); (C.G.); (D.A.E.); (S.F.); (C.E.S.); (T.E.M.)
| | - Christina Kyriakaki
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (C.K.); (E.T.); (K.T.); (C.G.); (D.A.E.); (S.F.); (C.E.S.); (T.E.M.)
| | - Eleni Triantafyllou
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (C.K.); (E.T.); (K.T.); (C.G.); (D.A.E.); (S.F.); (C.E.S.); (T.E.M.)
| | - Kyriaki Tsirka
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (C.K.); (E.T.); (K.T.); (C.G.); (D.A.E.); (S.F.); (C.E.S.); (T.E.M.)
| | - Christina Gioti
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (C.K.); (E.T.); (K.T.); (C.G.); (D.A.E.); (S.F.); (C.E.S.); (T.E.M.)
| | - Dimitris Gkikas
- DODONI SA, 1 Tagmatarchi Kostaki, Eleousa, 45500 Ioannina, Greece; (D.G.); (K.N.)
| | | | - Dimitrios A. Exarchos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (C.K.); (E.T.); (K.T.); (C.G.); (D.A.E.); (S.F.); (C.E.S.); (T.E.M.)
- Hellenic Institute for Packaging and Agrifood Safety, 45445 Ioannina, Greece
| | - Spyridoula Farmaki
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (C.K.); (E.T.); (K.T.); (C.G.); (D.A.E.); (S.F.); (C.E.S.); (T.E.M.)
- Hellenic Institute for Packaging and Agrifood Safety, 45445 Ioannina, Greece
| | - Aris E. Giannakas
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece;
| | - Constantinos E. Salmas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (C.K.); (E.T.); (K.T.); (C.G.); (D.A.E.); (S.F.); (C.E.S.); (T.E.M.)
| | - Theodore E. Matikas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (C.K.); (E.T.); (K.T.); (C.G.); (D.A.E.); (S.F.); (C.E.S.); (T.E.M.)
- Hellenic Institute for Packaging and Agrifood Safety, 45445 Ioannina, Greece
| | - Dimitrios Moschovas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (C.K.); (E.T.); (K.T.); (C.G.); (D.A.E.); (S.F.); (C.E.S.); (T.E.M.)
| | - Apostolos Avgeropoulos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (C.K.); (E.T.); (K.T.); (C.G.); (D.A.E.); (S.F.); (C.E.S.); (T.E.M.)
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Zaharioudakis K, Kollia E, Leontiou A, Moschovas D, Karydis-Messinis A, Avgeropoulos A, Zafeiropoulos NE, Ragkava E, Kehayias G, Proestos C, Salmas CE, Giannakas AE. Carvacrol Microemulsion vs. Nanoemulsion as Novel Pork Minced Meat Active Coatings. Nanomaterials (Basel) 2023; 13:3161. [PMID: 38133058 PMCID: PMC10745327 DOI: 10.3390/nano13243161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 12/07/2023] [Accepted: 12/14/2023] [Indexed: 12/23/2023]
Abstract
Carvacrol is well documented for its antibacterial and antioxidant effects. However, its high volatility has directed researchers toward nanoencapsulation technology according to bioeconomy and sustainability trends. This study examined and compared free carvacrol (FC), carvacrol microemulsion (MC), carvacrol microemulsion busted with chitosan (MMC), and carvacrol nanoemulsions (NC) as active coatings on extending minced pork meat shelf life at 4 ± 1 °C for 9 days, focusing on microbiological, physiochemical, and sensory characteristics. The research involved pre-characterizing droplet sizes, evaluating antioxidants, and determining antibacterial efficacy. The results demonstrated that NC with a 21 nm droplet size exhibited the highest antioxidant and antibacterial activity. All coatings succeeded in extending the preservation of fresh minced pork meat in comparison to the free carvacrol sample (FC). The NC coating showed the highest extension of minced pork meat preservation and maintained meat freshness for 9 days, with a lower TBARs of 0.736 mg MDA/Kg, and effectively reduced mesophilic, lactic acid, and psychotrophic bacterial counts more significantly by 1.2, 2, and 1.3 log, respectively, as compared to FC. Sensory assessments confirmed the acceptability of NC and MCC coatings. Overall, the carvacrol-based nanoemulsion can be considered a novel antioxidant and antimicrobial active coating due to its demonstrated higher efficacy in all the examined tests performed.
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Affiliation(s)
- Konstantinos Zaharioudakis
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece; (K.Z.); (A.L.); (E.R.); (G.K.)
| | - Eleni Kollia
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Zografou, 15771 Athens, Greece; (E.K.); (C.P.)
| | - Areti Leontiou
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece; (K.Z.); (A.L.); (E.R.); (G.K.)
| | - Dimitrios Moschovas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (A.K.-M.); (A.A.); (N.E.Z.)
| | - Andreas Karydis-Messinis
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (A.K.-M.); (A.A.); (N.E.Z.)
| | - Apostolos Avgeropoulos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (A.K.-M.); (A.A.); (N.E.Z.)
| | - Nikolaos E. Zafeiropoulos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (A.K.-M.); (A.A.); (N.E.Z.)
| | - Efthymia Ragkava
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece; (K.Z.); (A.L.); (E.R.); (G.K.)
| | - George Kehayias
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece; (K.Z.); (A.L.); (E.R.); (G.K.)
| | - Charalampos Proestos
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Zografou, 15771 Athens, Greece; (E.K.); (C.P.)
| | - Constantinos E. Salmas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (A.K.-M.); (A.A.); (N.E.Z.)
| | - Aris E. Giannakas
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece; (K.Z.); (A.L.); (E.R.); (G.K.)
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Baikousi M, Gantzoudi A, Gioti C, Moschovas D, Giannakas AE, Avgeropoulos A, Salmas CE, Karakassides MA. Hydrogen Sulfide Removal via Sorption Process on Activated Carbon-Metal Oxide Composites Derived from Different Biomass Sources. Molecules 2023; 28:7418. [PMID: 37959837 PMCID: PMC10650035 DOI: 10.3390/molecules28217418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Revised: 10/24/2023] [Accepted: 11/02/2023] [Indexed: 11/15/2023] Open
Abstract
Biomass exploitation is a global trend due to the circular economy and the environmentally friendly spirit. Numerous applications are now based on the use of biomass-derived products. Hydrogen sulfide (H2S) is a highly toxic and environmentally hazardous gas which is emitted from various processes. Thus, the efficient removal of this toxic hazardous gas following cost-effective processes is an essential requirement. In this study, we present the synthesis and characterization of biomass-derived activated carbon/zinc oxide (ZnO@AC) composites from different biomass sources as potential candidates for H2S sorption. The synthesis involved a facile method for activated carbon production via pyrolysis and chemical activation of biomass precursors (spent coffee, Aloe-Vera waste leaves, and corncob). Activated carbon production was followed by the incorporation of zinc oxide nanoparticles into the porous carbon matrix using a simple melt impregnation method. The synthesized ZnO@AC composites were characterized using X-ray diffraction (XRD), infrared spectroscopy (IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and nitrogen porosimetry. The H2S removal performance of the ZnO@AC composites was evaluated through sorption experiments using a handmade apparatus. Our findings demonstrate that the Aloe-Vera-, spent coffee-, and corncob-derived composites exhibit superior H2S sorption capacity up to 106 mgH2S/gads., 66 mgH2S/gads., and 47 mgH2S/gads., respectively.
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Affiliation(s)
- Maria Baikousi
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (M.B.); (A.G.); (C.G.); (D.M.); (A.A.)
| | - Anna Gantzoudi
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (M.B.); (A.G.); (C.G.); (D.M.); (A.A.)
| | - Christina Gioti
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (M.B.); (A.G.); (C.G.); (D.M.); (A.A.)
| | - Dimitrios Moschovas
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (M.B.); (A.G.); (C.G.); (D.M.); (A.A.)
| | - Aris E. Giannakas
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece;
| | - Apostolos Avgeropoulos
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (M.B.); (A.G.); (C.G.); (D.M.); (A.A.)
| | - Constantinos E. Salmas
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (M.B.); (A.G.); (C.G.); (D.M.); (A.A.)
| | - Michael A. Karakassides
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (M.B.); (A.G.); (C.G.); (D.M.); (A.A.)
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Manesi GM, Moutsios I, Moschovas D, Papadopoulos G, Ntaras C, Rosenthal M, Vidal L, Ageev GG, Ivanov DA, Avgeropoulos A. Synthesis and Structural Insight into poly(dimethylsiloxane)- b-poly(2-vinylpyridine) Copolymers. Polymers (Basel) 2023; 15:4227. [PMID: 37959907 PMCID: PMC10648597 DOI: 10.3390/polym15214227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 10/23/2023] [Accepted: 10/24/2023] [Indexed: 11/15/2023] Open
Abstract
In this study, the use of anionic polymerization for the synthesis of living poly(dimethylsiloxane) or PDMS-Li+, as well as poly(2-vinylpyridine) or P2VP-Li+ homopolymers, and the subsequent use of chlorosilane chemistry in order for the two blocks to be covalently joined leading to PDMS-b-P2VP copolymers is proposed. High vacuum manipulations enabled the synthesis of well-defined materials with different molecular weights (Μ¯n, from 9.8 to 36.0 kg/mol) and volume fraction ratios (φ, from 0.15 to 0.67). The Μ¯n values, dispersity indices, and composition were determined through membrane/vapor pressure osmometry (MO/VPO), size exclusion chromatography (SEC), and proton nuclear magnetic resonance spectroscopy (1H NMR), respectively, while the thermal transitions were determined via differential scanning calorimetry (DSC). The morphological characterization results suggested that for common composition ratios, lamellar, cylindrical, and spherical phases with domain periodicities ranging from approximately 15 to 39 nm are formed. A post-polymerization chemical modification reaction to quaternize the nitrogen atom in some of the P2VP monomeric units in the copolymer with the highest P2VP content, and the additional characterizations through 1H NMR, infrared spectroscopy, DSC, and contact angle are reported. The synthesis, characterization, and quaternization of the copolymer structure are important findings toward the preparation of functional materials with enhanced properties suitable for various nanotechnology applications.
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Affiliation(s)
- Gkreti-Maria Manesi
- Department of Materials Science & Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (G.-M.M.); (I.M.); (D.M.); (G.P.); (C.N.)
| | - Ioannis Moutsios
- Department of Materials Science & Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (G.-M.M.); (I.M.); (D.M.); (G.P.); (C.N.)
- Institut de Sciences des Matériaux de Mulhouse—IS2M, CNRS UMR7361, 15 Jean Starcky, 68057 Mulhouse, France; (L.V.); (D.A.I.)
| | - Dimitrios Moschovas
- Department of Materials Science & Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (G.-M.M.); (I.M.); (D.M.); (G.P.); (C.N.)
| | - Georgios Papadopoulos
- Department of Materials Science & Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (G.-M.M.); (I.M.); (D.M.); (G.P.); (C.N.)
| | - Christos Ntaras
- Department of Materials Science & Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (G.-M.M.); (I.M.); (D.M.); (G.P.); (C.N.)
| | - Martin Rosenthal
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Leuven, Belgium;
| | - Loic Vidal
- Institut de Sciences des Matériaux de Mulhouse—IS2M, CNRS UMR7361, 15 Jean Starcky, 68057 Mulhouse, France; (L.V.); (D.A.I.)
| | - Georgiy G. Ageev
- Scientific Center for Genetics and Life Sciences, Sirius University of Science and Technology, 1 Olympic Ave., 354340 Sochi, Russia;
| | - Dimitri A. Ivanov
- Institut de Sciences des Matériaux de Mulhouse—IS2M, CNRS UMR7361, 15 Jean Starcky, 68057 Mulhouse, France; (L.V.); (D.A.I.)
- Scientific Center for Genetics and Life Sciences, Sirius University of Science and Technology, 1 Olympic Ave., 354340 Sochi, Russia;
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry RAS, Russian Academy of Sciences, Chernogolovka, 142432 Moscow, Russia
| | - Apostolos Avgeropoulos
- Department of Materials Science & Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (G.-M.M.); (I.M.); (D.M.); (G.P.); (C.N.)
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia
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Karydis-Messinis A, Moschovas D, Markou M, Tsirka K, Gioti C, Bagli E, Murphy C, Giannakas AE, Paipetis A, Karakassides MA, Avgeropoulos A, Salmas CE, Zafeiropoulos NE. Hydrogel Membranes from Chitosan-Fish Gelatin-Glycerol for Biomedical Applications: Chondroitin Sulfate Incorporation Effect in Membrane Properties. Gels 2023; 9:844. [PMID: 37998934 PMCID: PMC10670475 DOI: 10.3390/gels9110844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 10/18/2023] [Accepted: 10/23/2023] [Indexed: 11/25/2023] Open
Abstract
Chondroitin sulfate (ChS), chitosan (Chi), and fish gelatin (FG), which are byproducts of a fish-treatment small enterprise, were incorporated with glycerol (Gly) to obtain dense hydrogel membranes with reduced brittleness, candidates for dressing in wound healing applications. The mechanical properties of all samples were studied via Dynamic Mechanical Analysis (DMA) and tensile tests while their internal structure was characterized using Attenuated Total Reflectance-Fourier Transform Infrared Spectroscopy (ATR-FTIR) and X-ray Diffraction (XRD) instruments. Their surface morphology was analyzed by ThermoGravimetric Analysis (TGA) method, while their water permeability was estimated via Water Vapor Transmission Rate (WVTR) measurements. Wettability and degradation rate measurements were also carried out. Characterization results indicated that secondary interactions between the natural polymers and the plasticizer create the hydrogel membranes. The samples were amorphous due to the high concentration of plasticizer and the amorphous nature of the natural polymers. The integration of ChS led to decreased decomposition temperature in comparison with the glycerol-free sample, and all the materials had dense structures. Finally, the in vitro endothelial cell attachment studies indicate that the hydrogel membranes successfully support the attachment and survival of primary on the hydrogel membranes and could be appropriate for external application in wound healing applications as dressings.
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Affiliation(s)
- Andreas Karydis-Messinis
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (K.T.); (C.G.); (A.P.); (M.A.K.); (A.A.)
| | - Dimitrios Moschovas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (K.T.); (C.G.); (A.P.); (M.A.K.); (A.A.)
| | - Maria Markou
- Biomedical Research Institute (BRI)-FORTH, 45110 Ioannina, Greece; (M.M.); (E.B.); (C.M.)
| | - Kyriaki Tsirka
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (K.T.); (C.G.); (A.P.); (M.A.K.); (A.A.)
| | - Christina Gioti
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (K.T.); (C.G.); (A.P.); (M.A.K.); (A.A.)
| | - Eleni Bagli
- Biomedical Research Institute (BRI)-FORTH, 45110 Ioannina, Greece; (M.M.); (E.B.); (C.M.)
| | - Carol Murphy
- Biomedical Research Institute (BRI)-FORTH, 45110 Ioannina, Greece; (M.M.); (E.B.); (C.M.)
| | - Aris E. Giannakas
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece;
| | - Alkis Paipetis
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (K.T.); (C.G.); (A.P.); (M.A.K.); (A.A.)
| | - Michael A. Karakassides
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (K.T.); (C.G.); (A.P.); (M.A.K.); (A.A.)
| | - Apostolos Avgeropoulos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (K.T.); (C.G.); (A.P.); (M.A.K.); (A.A.)
| | - Constantinos E. Salmas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (K.T.); (C.G.); (A.P.); (M.A.K.); (A.A.)
| | - Nikolaos E. Zafeiropoulos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (K.T.); (C.G.); (A.P.); (M.A.K.); (A.A.)
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Giannakas AE, Karabagias VK, Moschovas D, Leontiou A, Karabagias IK, Georgopoulos S, Karydis-Messinis A, Zaharioudakis K, Andritsos N, Kehayias G, Avgeropoulos A, Proestos C, Salmas CE. Thymol@activated Carbon Nanohybrid for Low-Density Polyethylene-Based Active Packaging Films for Pork Fillets' Shelf-Life Extension. Foods 2023; 12:2590. [PMID: 37444330 DOI: 10.3390/foods12132590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 06/29/2023] [Accepted: 06/30/2023] [Indexed: 07/15/2023] Open
Abstract
Τhe replacement of food packaging additives and preservatives with bio-based antioxidant/antibacterial compounds has been a common practice in recent years following the trend of bioeconomy and nanotechnology. Such bio-additives are often enclosed in nanocarriers for a controlled release process. Following this trend in this work, a thymol (TO)-rich activated carbon (AC) nanohybrid was prepared and characterized physicochemically with various techniques. This TO@AC nanohybrid, along with the pure activated carbon, was extruded with low-density polyethylene (LDPE) to develop novel active packaging films. The codenames used in this paper were LDPE/xTO@AC and LDPE/xAC for the nanohybrid and the pure activated carbon, respectively. X-ray diffractometry, Fourier-transform infrared spectroscopy, and scanning electron microscopy measurements showed high dispersity of both the TO@AC nanohybrid and the pure AC in the LDPE matrix, resulting in enhanced mechanical properties. The active film with 15 wt.% of the TO@AC nanohybrid (LDPE/15TO@AC) exhibited a 230% higher water/vapor barrier and 1928% lower oxygen permeability than the pure LDPE film. For this active film, the highest antioxidant activity referred to the DPPH assay (44.4%), the lowest thymol release rate (k2 ≈ 1.5 s-1), and the highest antibacterial activity were recorded, resulting in a 2-day extension of fresh pork fillets' shelf-life.
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Affiliation(s)
- Aris E Giannakas
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
| | | | - Dimitrios Moschovas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Areti Leontiou
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
| | - Ioannis K Karabagias
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
| | - Stavros Georgopoulos
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
| | | | | | - Nikolaos Andritsos
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
| | - George Kehayias
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
| | - Apostolos Avgeropoulos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Charalampos Proestos
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Zografou, 15771 Athens, Greece
| | - Constantinos E Salmas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
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8
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Politakos N, Avgeropoulos A. Advances and Applications of Block Copolymers. Polymers (Basel) 2023; 15:2930. [PMID: 37447575 DOI: 10.3390/polym15132930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Accepted: 06/19/2023] [Indexed: 07/15/2023] Open
Abstract
Polymers are materials that have constantly evolved from the beginning of their discovery until the present day [...].
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Affiliation(s)
- Nikolaos Politakos
- POLYMAT, Applied Chemistry Department, Faculty of Chemistry, University of the Basque Country, UPV/EHU, Paseo Manuel de Lardizabal 3, 20018 Donostia-San Sebastián, Spain
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University Campus-Dourouti, University of Ioannina, 45110 Ioannina, Greece
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia
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9
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Syranidou E, Karkanorachaki K, Barouta D, Papadaki E, Moschovas D, Avgeropoulos A, Kalogerakis N. Relationship between the Carbonyl Index (CI) and Fragmentation of Polyolefin Plastics during Aging. Environ Sci Technol 2023; 57:8130-8138. [PMID: 37194994 DOI: 10.1021/acs.est.3c01430] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The durability of plastics in the marine environment has emerged as a crucial environmental issue. However, the contribution of several factors and the threshold point after which a plastic product generates secondary micro- and nanoplastics is still unclear. To investigate the interaction of environmental parameters with the physicochemical properties of polyethylene (PE) and polypropylene (PP) films in the marine environment, polyolefin films were subjected to weathering in emulated coastal and marine environments for 12 months, focusing on the relationship between radiation load, alteration on the surface, and subsequent generation of microplastics (MPs). The weight average molecular weight (Mw) was found to be strongly correlated with the generated particles and the Feret diameter, implying the generation of secondary microplastics at decreased Mw. A significant and strong relationship between the carbonyl index (CI) and the Feret diameter for PP films weathered on beach sand was identified. This CI-fragmentation relationship involves three sequential stages and suggests that spontaneous fragmentation occurs at CI values above 0.7.
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Affiliation(s)
- Evdokia Syranidou
- School of Chemical and Environmental Engineering, Technical University of Crete, Chania GR-73100, Greece
| | - Katerina Karkanorachaki
- School of Chemical and Environmental Engineering, Technical University of Crete, Chania GR-73100, Greece
| | - Despoina Barouta
- Department of Environmental Engineering, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark
| | - Elisavet Papadaki
- School of Chemical and Environmental Engineering, Technical University of Crete, Chania GR-73100, Greece
| | - Dimitrios Moschovas
- Department of Materials Science Engineering, University of Ioannina, Ioannina GR-45110, Greece
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, Ioannina GR-45110, Greece
| | - Nicolas Kalogerakis
- School of Chemical and Environmental Engineering, Technical University of Crete, Chania GR-73100, Greece
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10
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Angelopoulou PP, Stathouraki MM, Keum JK, Hong K, Avgeropoulos A, Sakellariou G. Synthesis and morphological characterization of linear and miktoarm star poly(solketal methacrylate)-block-polystyrene copolymers. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111995] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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11
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Hung CJ, Panda AS, Lee YC, Liu SY, Lin JW, Wang HF, Avgeropoulos A, Tseng FG, Chen FR, Ho RM. Direct Visualization of the Self-Alignment Process for Nanostructured Block Copolymer Thin Films by Transmission Electron Microscopy. ACS Macro Lett 2023; 12:570-576. [PMID: 37053545 DOI: 10.1021/acsmacrolett.3c00098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/15/2023]
Abstract
Herein, this work aims to directly visualize the morphological evolution of the controlled self-assembly of star-block polystyrene-block-polydimethylsiloxane (PS-b-PDMS) thin films via in situ transmission electron microscopy (TEM) observations. With an environmental chip, possessing a built-in metal wire-based microheater fabricated by the microelectromechanical system (MEMS) technique, in situ TEM observations can be conducted under low-dose conditions to investigate the development of film-spanning perpendicular cylinders in the block copolymer (BCP) thin films via a self-alignment process. Owing to the free-standing condition, a symmetric condition of the BCP thin films can be formed for thermal annealing under vacuum with neutral air surface, whereas an asymmetric condition can be formed by an air plasma treatment on one side of the thin film that creates an end-capped neutral layer. A systematic comparison of the time-resolved self-alignment process in the symmetric and asymmetric conditions can be carried out, giving comprehensive insights for the self-alignment process via the nucleation and growth mechanism.
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Affiliation(s)
- Chen-Jung Hung
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Aum Sagar Panda
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Yi-Chien Lee
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Shih-Yi Liu
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu, 30013, Taiwan
- Department of Electron Microscopy Development and Application, Material and Chemical Research Laboratories, Industrial Technology Research Institute (ITRI), Hsinchu, 30013, Taiwan
| | - Jheng-Wei Lin
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Hsiao-Fang Wang
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, University Campus, Ioannina 45110, Greece
| | - Fan-Gang Tseng
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu, 30013, Taiwan
| | - Fu-Rong Chen
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu, 30013, Taiwan
- Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, 518057, Hong Kong
| | - Rong-Ming Ho
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
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12
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Panda AS, Lee YC, Shastry T, Manesi GM, Avgeropoulos A, Ho RM. Controlled Orientation of Silicon-Containing Diblock Copolymer Thin Films by Substrate Functionalization Under Vacuum. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c01765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Aum Sagar Panda
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu30013, Taiwan
| | - Yi-Chien Lee
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu30013, Taiwan
| | - Thanmayee Shastry
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu30013, Taiwan
| | - Gkreti-Maria Manesi
- Department of Materials Science Engineering, University of Ioannina, University Campus, Ioannina45110, Greece
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, University Campus, Ioannina45110, Greece
| | - Rong-Ming Ho
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu30013, Taiwan
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13
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Salmas CE, Giannakas AE, Moschovas D, Kollia E, Georgopoulos S, Gioti C, Leontiou A, Avgeropoulos A, Kopsacheili A, Avdylaj L, Proestos C. Kiwi Fruits Preservation Using Novel Edible Active Coatings Based on Rich Thymol Halloysite Nanostructures and Chitosan/Polyvinyl Alcohol Gels. Gels 2022; 8:gels8120823. [PMID: 36547348 PMCID: PMC9777596 DOI: 10.3390/gels8120823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/06/2022] [Accepted: 12/09/2022] [Indexed: 12/15/2022] Open
Abstract
The concept of this study is the replacement of previous fossil-based techniques for food packaging and food shelf-life extension, with novel more green processes and materials following the spirit of circular economy and the global trend for environmentally positive fingerprints. A novel adsorption process to produce thymol-halloysite nanohybrids is presented in this work. The high dispersion of this thymol-halloysite nanostructure in chitosan biopolymer is one of the goals of this study. The incorporation of this biodegradable matrix with poly-vinyl-alcohol produced a very promising food-packaging film. Mechanical, water-oxygen barrier, antimicrobial, and antioxidant properties were measured. Transparency levels were also tested using a UV-vis instrument. Moreover, the developed films were tested in-vivo for the preservation and the extension of the shelf-life of kiwi fruits. In all cases, results indicated that the increased fraction of thymol from thyme oil significantly enhances the antimicrobial and antioxidant activity of the prepared chitosan-poly-vinyl- alcohol gel. The use of the halloysite increases the mechanical and water-oxygen barrier properties and leads to a control release process of thymol which extends the preservation and the shelf-life of kiwi fruits. Finally, the results indicated that the halloysite improves the properties of the chitosan/poly-vinyl-alcohol films, and the thymol makes them further advantageous.
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Affiliation(s)
- Constantinos E. Salmas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
- Correspondence: (C.E.S.); (A.E.G.); (C.P.)
| | - Aris E. Giannakas
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
- Correspondence: (C.E.S.); (A.E.G.); (C.P.)
| | - Dimitrios Moschovas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Eleni Kollia
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Zografou, 15771 Athens, Greece
| | - Stavros Georgopoulos
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
| | - Christina Gioti
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Areti Leontiou
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
| | - Apostolos Avgeropoulos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Anna Kopsacheili
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Zografou, 15771 Athens, Greece
| | - Learda Avdylaj
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Zografou, 15771 Athens, Greece
| | - Charalampos Proestos
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Zografou, 15771 Athens, Greece
- Correspondence: (C.E.S.); (A.E.G.); (C.P.)
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14
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Lazanas AC, Katsouras A, Spanos M, Manesi GM, Moutsios I, Vashurkin DV, Moschovas D, Gioti C, Karakassides MA, Gregoriou VG, Ivanov DA, Chochos CL, Avgeropoulos A. Synthesis and Characterization of Hybrid Materials Derived from Conjugated Copolymers and Reduced Graphene Oxide. Polymers (Basel) 2022; 14:polym14235292. [PMID: 36501686 PMCID: PMC9737337 DOI: 10.3390/polym14235292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 11/25/2022] [Accepted: 11/29/2022] [Indexed: 12/11/2022] Open
Abstract
In this study the preparation of hybrid materials based on reduced graphene oxide (rGO) and conjugated copolymers is reported. By tuning the number and arrangement of thiophenes in the main chain (indacenothiophene or indacenothienothiophene) and the nature of the polymer acceptor (difluoro benzothiadiazole or diketopyrrolopyrrole) semiconducting copolymers were synthesized through Stille aromatic coupling and characterized to determine their molecular characteristics. The graphene oxide was synthesized using the Staudenmaier method and was further modified to reduced graphene oxide prior to structural characterization. Various mixtures with different rGO quantities and conjugated copolymers were prepared to determine the optoelectronic, thermal and morphological properties. An increase in the maximum absorbance ranging from 3 to 6 nm for all hybrid materials irrespective of the rGO concentration, when compared to the pristine conjugated copolymers, was estimated through the UV-Vis spectroscopy indicating a differentiation on the optical properties. Through voltammetric experiments the oxidation and reduction potentials were determined and the calculated HOMO and LUMO levels revealed a decrease on the electrochemical energy gap for low rGO concentrations. The study indicates the potential of the hybrid materials consisting of graphene oxide and high band gap conjugated copolymers for applications related to organic solar cells.
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Affiliation(s)
- Alexandros Ch. Lazanas
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Athanasios Katsouras
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Michael Spanos
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece
- National Hellenic Research Foundation (NHRF), 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
| | - Gkreti-Maria Manesi
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Ioannis Moutsios
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece
- Institut de Sciences des Matériaux de Mulhouse—IS2M, CNRS UMR7361, 15 Jean Starcky, 68057 Mulhouse, France
| | - Dmitry V. Vashurkin
- Faculty of Chemistry, Lomonosov Moscow State University, 9MSU, GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow, Russia
| | - Dimitrios Moschovas
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Christina Gioti
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece
| | | | - Vasilis G. Gregoriou
- National Hellenic Research Foundation (NHRF), 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
| | - Dimitri A. Ivanov
- Institut de Sciences des Matériaux de Mulhouse—IS2M, CNRS UMR7361, 15 Jean Starcky, 68057 Mulhouse, France
- Faculty of Chemistry, Lomonosov Moscow State University, 9MSU, GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow, Russia
| | - Christos L. Chochos
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece
- National Hellenic Research Foundation (NHRF), 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
- Correspondence: (C.L.C.); (A.A.); Tel.: +30-26-5100-9001 (A.A.)
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece
- Faculty of Chemistry, Lomonosov Moscow State University, 9MSU, GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia
- Correspondence: (C.L.C.); (A.A.); Tel.: +30-26-5100-9001 (A.A.)
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15
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Angelopoulou PP, Moutsios I, Manesi GM, Ivanov DA, Sakellariou G, Avgeropoulos A. Designing high χ copolymer materials for nanotechnology applications: A systematic bulk vs. thin films approach. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Bellou MG, Gkantzou E, Skonta A, Moschovas D, Spyrou K, Avgeropoulos A, Gournis D, Stamatis H. Development of 3D Printed Enzymatic Microreactors for Lipase-Catalyzed Reactions in Deep Eutectic Solvent-Based Media. Micromachines (Basel) 2022; 13:mi13111954. [PMID: 36422383 PMCID: PMC9693471 DOI: 10.3390/mi13111954] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2022] [Revised: 11/08/2022] [Accepted: 11/09/2022] [Indexed: 05/28/2023]
Abstract
In this study, 3D printing technology was exploited for the development of immobilized enzyme microreactors that could be used for biocatalytic processes in Deep Eutectic Solvent (DES)-based media. 3D-printed polylactic acid (PLA) microwell plates or tubular microfluidic reactors were modified with polyethylenimine (PEI) and lipase from Candida antarctica (CALB) was covalently immobilized in the interior of each structure. DESs were found to have a negligible effect on the activity and stability of CALB, and the system proved highly stable and reusable in the presence of DESs for the hydrolysis of p-nitrophenyl butyrate (p-NPB). A kinetic study under flow conditions revealed an enhancement of substrate accessibility in the presence of Betaine: Glycerol (Bet:Gly) DES, while the system was not severely affected by diffusion limitations. Incubation of microreactors in 100% Bet:Gly preserved the enzyme activity by 53% for 30 days of storage at 60 °C, while the buffer-stored sample had already been deactivated. The microfluidic enzyme reactor was efficiently used for the trans-esterification of ethyl ferulate (EF) with glycerol towards the production of glyceryl ferulate (GF), known for its antioxidant potential. The biocatalytic process under continuous flow conditions exhibited 23 times higher productivity than the batch reaction system. This study featured an effective and robust biocatalytic system with immobilized lipase that can be used both in hydrolytic and synthetic applications, while further optimization is expected to upgrade the microreactor system performance.
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Affiliation(s)
- Myrto G. Bellou
- Laboratory of Biotechnology, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece
| | - Elena Gkantzou
- Laboratory of Biotechnology, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece
| | - Anastasia Skonta
- Laboratory of Biotechnology, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece
| | - Dimitrios Moschovas
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Konstantinos Spyrou
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Apostolos Avgeropoulos
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Dimitrios Gournis
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Haralambos Stamatis
- Laboratory of Biotechnology, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece
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17
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Shan W, Weisbord I, Feng X, Hyon J, Manesi GM, Avgeropoulos A, Segal-Peretz T, Thomas EL. Layered Thin Film Deposition via Extreme Inter-Brush Slip in a Lamellar Block Copolymer. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01496] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wenpeng Shan
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77840, United States
| | - Inbal Weisbord
- Department of Chemical Engineering Technion, Israel Institute of Technology, Haifa 32000, Israel
| | - Xueyan Feng
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77840, United States
| | - Jinho Hyon
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77840, United States
| | - Gkreti-Maria Manesi
- Department of Materials Science and Engineering, University of Ioannina, University Campus-Dourouti, Ioannina 45110, Greece
| | - Apostolos Avgeropoulos
- Department of Materials Science and Engineering, University of Ioannina, University Campus-Dourouti, Ioannina 45110, Greece
| | - Tamar Segal-Peretz
- Department of Chemical Engineering Technion, Israel Institute of Technology, Haifa 32000, Israel
| | - Edwin L. Thomas
- Department of Materials Science and Engineering, Texas A&M University, College Station, Texas 77840, United States
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18
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Alexandri E, Primikyri A, Papamokos G, Venianakis T, Gkalpinos VK, Tzakos AG, Karydis-Messinis A, Moschovas D, Avgeropoulos A, Gerothanassis IP. NMR and computational studies reveal novel aspects in molecular recognition of unsaturated fatty acids with non-labelled serum albumin. FEBS J 2022; 289:5617-5636. [PMID: 35380736 DOI: 10.1111/febs.16453] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 03/12/2022] [Accepted: 04/03/2022] [Indexed: 12/19/2022]
Abstract
An approach based on the combined use of saturation transfer difference (STD), Tr-NOESY and Inter-ligand NOEs for PHArmacophore Mapping (INPHARMA) NMR techniques and docking calculations is reported, for the first time, for mapping interactions and specific binding sites of caproleic acid (10 : 1 cis-9), oleic acid (18 : 1 cis-9), linoleic acid (18 : 2 cis-9,12) and linolenic (18 : 3, cis-9,12,15) free fatty acids (FFAs) with non-labelled serum albumin (BSA/HSA). Significant negative inter-ligand NOEs between the FFAs and the drugs ibuprofen and warfarin, through competition experiments, were observed. The inter-ligand NOEs and docking calculations were interpreted in terms of competitive binding mode, the significant folding of the bis allylic region and the presence of two orientations of the FFAs in the warfarin binding site (FA7), due to two potential distinctive anchoring polar groups of amino acids. This conformational flexibility is the reason that, the location and conformational states of the FFAs in the binding site of warfarin could not be determined accurately, despite numerous available X-ray structural studies. α-Linolenic acid competes favourably with warfarin at the binding site FA7. Isothermal titration calorimetry experiments of the preformed HSA/α-linolenic acid complex upon titration with warfarin show a significant reduction in the binding constant of warfarin, in very good agreement with NMR and computational data. The combined use, therefore, of STD, Tr-NOESY and INPHARMA NMR, ITC and docking calculations may find promising applications in the field of protein-lipid recognition research.
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Affiliation(s)
- Eleni Alexandri
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Greece
| | - Alexandra Primikyri
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Greece
| | - Georgios Papamokos
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Greece
| | - Themistoklis Venianakis
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Greece
| | - Vasileios K Gkalpinos
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Greece
| | - Andreas G Tzakos
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Greece
| | | | - Dimitrios Moschovas
- Department of Materials Science & Engineering, University of Ioannina, Greece
| | | | - Ioannis P Gerothanassis
- Section of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Greece
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19
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Giannakas AE, Salmas CE, Moschovas D, Zaharioudakis K, Georgopoulos S, Asimakopoulos G, Aktypis A, Proestos C, Karakassides A, Avgeropoulos A, Zafeiropoulos NE, Nychas GJ. The Increase of Soft Cheese Shelf-Life Packaged with Edible Films Based on Novel Hybrid Nanostructures. Gels 2022; 8:gels8090539. [PMID: 36135251 PMCID: PMC9498775 DOI: 10.3390/gels8090539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/22/2022] [Accepted: 08/23/2022] [Indexed: 11/16/2022] Open
Abstract
This study presents, the development of a green method to produce rich in thymol natural zeolite (TO@NZ) nanostructures. This material was used to prepare sodium-alginate/glycerol/xTO@NZ (ALG/G/TO@NZ) nanocomposite active films for the packaging of soft cheese to extend its shelf-life. Differential scanning calorimetry (DSC), X-ray analysis (XRD), scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR) instruments were used for the characterization of such nanostructures and films, to identify the thymol adsorbed amount, to investigate the thermal behaviour, and to confirm the dispersion of nanostructure powder into the polymer matrix. Water vapor transmission rate, oxygen permeation analyzer, tensile measurements, antioxidant measurements, and antimicrobial measurements were used to estimate the film’s water and oxygen barrier, mechanical properties, nanostructure’s nanoreinforcement activity, antioxidant and antimicrobial activity. The findings from the study revealed that ALG/G/TO@NZ nanocomposite film could be used as an active packaging film for foods with enhanced, mechanical properties, oxygen and water barrier, antioxidant and antimicrobial activity, and it is capable of extending food shelf-life.
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Affiliation(s)
- Aris E. Giannakas
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
- Correspondence: (A.E.G.); (C.E.S.)
| | - Constantinos E. Salmas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
- Correspondence: (A.E.G.); (C.E.S.)
| | - Dimitrios Moschovas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Konstantinos Zaharioudakis
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
- School of Food and Nutritional Sciences, Department of Food Science and Human Nutrition, Laboratory of Microbiology and Biotechnology of Foods, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - Stavros Georgopoulos
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
| | - Georgios Asimakopoulos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Anastasios Aktypis
- School of Food and Nutritional Sciences, Department of Food Science and Human Nutrition, Laboratory of Microbiology and Biotechnology of Foods, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
| | - Charalampos Proestos
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - Anastasios Karakassides
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Apostolos Avgeropoulos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | | | - George-John Nychas
- School of Food and Nutritional Sciences, Department of Food Science and Human Nutrition, Laboratory of Microbiology and Biotechnology of Foods, Agricultural University of Athens, Iera Odos 75, 11855 Athens, Greece
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20
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Panda AS, Lee YC, Hung CJ, Liu KP, Chang CY, Manesi GM, Avgeropoulos A, Tseng FG, Chen FR, Ho RM. Vacuum-Driven Orientation of Nanostructured Diblock Copolymer Thin Films. ACS Nano 2022; 16:12686-12694. [PMID: 35905494 DOI: 10.1021/acsnano.2c04368] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
This work aims to demonstrate a facile method for the controlled orientation of nanostructures of block copolymer (BCP) thin films. A simple diblock copolymer system, polystyrene-block-polydimethylsiloxane (PS-b-PDMS), is chosen to demonstrate vacuum-driven orientation for solving the notorious low-surface-energy problem of silicon-based BCP nanopatterning. By taking advantage of the pressure dependence of the surface tension of polymeric materials, a neutral air surface for the PS-b-PDMS thin film can be formed under a high vacuum degree (∼10-4 Pa), allowing the formation of the film-spanning perpendicular cylinders and lamellae upon thermal annealing. In contrast to perpendicular lamellae, a long-range lateral order for forming perpendicular cylinders can be efficiently achieved through the self-alignment mechanism for induced ordering from the top and bottom of the free-standing thin film.
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Affiliation(s)
- Aum Sagar Panda
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Yi-Chien Lee
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Chen-Jung Hung
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Kang-Ping Liu
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Cheng-Yen Chang
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Gkreti-Maria Manesi
- Department of Materials Science Engineering, University of Ioannina, University Campus, Ioannina 45110, Greece
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, University Campus, Ioannina 45110, Greece
| | - Fan-Gang Tseng
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Fu-Rong Chen
- Department of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan
- Department of Materials Science and Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong
| | - Rong-Ming Ho
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
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21
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Giannakas AE, Salmas CE, Moschovas D, Baikousi M, Kollia E, Tsigkou V, Karakassides A, Leontiou A, Kehayias G, Avgeropoulos A, Proestos C. Nanocomposite Film Development Based on Chitosan/Polyvinyl Alcohol Using ZnO@montmorillonite and ZnO@Halloysite Hybrid Nanostructures for Active Food Packaging Applications. Nanomaterials 2022; 12:nano12111843. [PMID: 35683702 PMCID: PMC9182113 DOI: 10.3390/nano12111843] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 05/19/2022] [Accepted: 05/25/2022] [Indexed: 11/16/2022]
Abstract
The global turn from the linear to the circular economy imposes changes in common activities such as food packaging. The use of biodegradable materials such as polyvinyl alcohol, natural raw materials such as clays, and food byproducts such as chitosan to develop novel food packaging films attracts the interest of industrial and institutional research centers. In this study, novel hybrid nanostructures were synthesized via the growth of zinc oxide nanorods on the surface of two nanoclays. The obtained nanostructures were incorporated with chitosan/polyvinyl alcohol composite either as nanoreinforcement or as an active agent to develop packaging films. The developed films were characterized via XRD, FTIR, mechanical, water-vapor diffusion, water sorption, and oxygen permeability measurements. Antimicrobial activity measurements were carried out against four different pathogen microorganisms. XRD indicated the formation of an intercalated nanocomposite structure for both types of nanoclays. Furthermore, improved tensile, water/oxygen barrier, and antimicrobial properties were recorded for all films compared to the pure chitosan/polyvinyl alcohol film. Overall, the results indicated that the use of the bio-based developed films led to an extension of food shelf life and could be used as novel active food packaging materials. Among them, the most promising film was the 6% wt. ZnO@halloysite.
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Affiliation(s)
- Aris E. Giannakas
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece;
- Correspondence: (A.E.G.); (C.E.S.); (C.P.)
| | - Constantinos E. Salmas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (M.B.); (A.K.); (A.A.)
- Correspondence: (A.E.G.); (C.E.S.); (C.P.)
| | - Dimitrios Moschovas
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (M.B.); (A.K.); (A.A.)
| | - Maria Baikousi
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (M.B.); (A.K.); (A.A.)
| | - Eleni Kollia
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Zografou, 15771 Athens, Greece; (E.K.); (V.T.)
| | - Vasiliki Tsigkou
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Zografou, 15771 Athens, Greece; (E.K.); (V.T.)
| | - Anastasios Karakassides
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (M.B.); (A.K.); (A.A.)
| | - Areti Leontiou
- Laboratory of Food Technology, Department of Business Administration of Agricultural and Food Enterprises, University of Patras, 30100 Agrinio, Greece;
| | - George Kehayias
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece;
| | - Apostolos Avgeropoulos
- Department of Material Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (M.B.); (A.K.); (A.A.)
| | - Charalampos Proestos
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Zografou, 15771 Athens, Greece; (E.K.); (V.T.)
- Correspondence: (A.E.G.); (C.E.S.); (C.P.)
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22
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Siddique SK, Sadek H, Lee TL, Tsai CY, Chang SY, Tsai HH, Lin TS, Manesi GM, Avgeropoulos A, Ho RM. Block Copolymer Modified Nanonetwork Epoxy Resin for Superior Energy Dissipation. Polymers (Basel) 2022; 14:polym14091891. [PMID: 35567059 PMCID: PMC9105528 DOI: 10.3390/polym14091891] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/29/2022] [Accepted: 05/03/2022] [Indexed: 02/01/2023] Open
Abstract
Herein, this work aims to fabricate well-ordered nanonetwork epoxy resin modified with poly(butyl acrylate)-b-poly(methyl methacrylate) (PBA-b-PMMA) block copolymer (BCP) for enhanced energy dissipation using a self-assembled diblock copolymer of polystyrene-b-poly(dimethylsiloxane) (PS-b-PDMS) with gyroid and diamond structures as templates. A systematic study of mechanical properties using nanoindentation of epoxy resin with gyroid- and diamond-structures after modification revealed significant enhancement in energy dissipation, with the values of 0.36 ± 0.02 nJ (gyroid) and 0.43 ± 0.03 nJ (diamond), respectively, when compared to intrinsic epoxy resin (approximately 0.02 ± 0.002 nJ) with brittle characteristics. This enhanced property is attributed to the synergic effect of the deliberate structure with well-ordered nanonetwork texture and the toughening of BCP-based modifiers at the molecular level. In addition to the deliberate structural effect from the nanonetwork texture, the BCP modifier composed of epoxy-philic hard segment and epoxy-phobic soft segment led to dispersed soft-segment domains in the nanonetwork-structured epoxy matrix with superior interfacial strength for the enhancement of applied energy dissipation.
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Affiliation(s)
- Suhail K. Siddique
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan; (S.K.S.); (H.S.); (T.-L.L.)
| | - Hassan Sadek
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan; (S.K.S.); (H.S.); (T.-L.L.)
| | - Tsung-Lun Lee
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan; (S.K.S.); (H.S.); (T.-L.L.)
| | - Cheng-Yuan Tsai
- Department of Material Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan; (C.-Y.T.); (S.-Y.C.)
| | - Shou-Yi Chang
- Department of Material Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan; (C.-Y.T.); (S.-Y.C.)
| | - Hsin-Hsien Tsai
- Kaohsiung Factory R&D Department, Chang Chun Plastics Co., Ltd., Kaohsiung 81469, Taiwan; (H.-H.T.); (T.-S.L.)
| | - Te-Shun Lin
- Kaohsiung Factory R&D Department, Chang Chun Plastics Co., Ltd., Kaohsiung 81469, Taiwan; (H.-H.T.); (T.-S.L.)
| | - Gkreti-Maria Manesi
- Department of Materials Science Engineering, University Campus, University of Ioannina, 45110 Ioannina, Greece; (G.-M.M.); (A.A.)
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University Campus, University of Ioannina, 45110 Ioannina, Greece; (G.-M.M.); (A.A.)
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia
| | - Rong-Ming Ho
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan; (S.K.S.); (H.S.); (T.-L.L.)
- Correspondence: ; Tel.: +886-3-573-8349; Fax: +886-3-571-5408
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23
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Affiliation(s)
- Cheng-Yen Chang
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, R.O.C
| | - Gkreti-Maria Manesi
- Department of Materials Science Engineering, University of Ioannina, University Campus, Ioannina 45110, Greece
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, University Campus, Ioannina 45110, Greece
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 14 Moscow, Russia
| | - Rong-Ming Ho
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, R.O.C
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24
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Gkantzou E, Skonta A, Tsakni A, Polydera A, Moschovas D, Spyrou K, Avgeropoulos A, Gournis D, Houhoula D, Stamatis H. 3D printed PLA enzyme microreactors: Characterization and application for the modification of bioactive compounds. J Biotechnol 2022; 350:75-85. [DOI: 10.1016/j.jbiotec.2022.04.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 03/29/2022] [Accepted: 04/07/2022] [Indexed: 12/21/2022]
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25
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Tzianni ΕI, Moutsios I, Moschovas D, Avgeropoulos A, Govaris K, Panagiotidis L, Prodromidis MI. Smartphone paired SIM card-type integrated creatinine biosensor. Biosens Bioelectron 2022; 207:114204. [PMID: 35366578 DOI: 10.1016/j.bios.2022.114204] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 03/17/2022] [Accepted: 03/18/2022] [Indexed: 01/12/2023]
Abstract
Medical diagnostic sector is relying on affordable, handheld devices integrating smart biosensing and transducing interfaces that enable clinical analysis with minimal end-user intervention and resource requirements. In response, we propose here, a SIM card-type pH responsive polymer-modified paper-based biosensing device, coupled to a smartphone, for the determination of urinary creatinine. A vertical microfluidic channel was fabricated on a paper strip by wax printing. The hydrophilic area was coated by a poly(methylmethacrylate)/poly(methacrylic acid) random copolymer, PMMA-co-PMAA, and on top of it, creatinine deiminase (CD) was immobilized. Data demonstrated, on the one hand, zero vertical flow of urine through the enzyme-free PMMA-co-PMAA-modified paper strip, i.e., a high selectivity against the components of the matrix, and on the other hand, in the presence of CD, a creatinine -concentration dependent commence of sample's downward flow due to the selective, creatinine-triggered degradation of the copolymer by the enzymatically produced ammonia. This CD/PMMA-co-PMAA paper-based biosensing smart assembly is coupled with three conductive strips, which enable the automatic on/off (sample addition/measurement end) measurement of the copolymer degradation time, through electric resistance measurements. It also features an in-built sample well and wireless communication support through the integration of a Bluetooth® microprocessor incorporated with time and resistance measuring circuits. Using newly synthesized pH responsive PMMA-co-PMAA at different molecular weights and volume fraction ratios offering tunable dissolution properties, the detection range was adjusted over 3-30 mM creatinine to overspread the normal range of creatinine in urine. The device was successfully applied to the determination of urinary creatinine.
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Affiliation(s)
- Εleni I Tzianni
- Laboratory of Analytical Chemistry, University of Ioannina (UoI), 45 110, Ioannina, Greece
| | | | | | | | | | | | - Mamas I Prodromidis
- Laboratory of Analytical Chemistry, University of Ioannina (UoI), 45 110, Ioannina, Greece; Institute of Materials Science and Computing, University Research Center of Ioannina (URCI), Ioannina, Greece.
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26
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Giannakas AE, Salmas CE, Leontiou A, Moschovas D, Baikousi M, Kollia E, Tsigkou V, Karakassides A, Avgeropoulos A, Proestos C. Performance of Thyme Oil@Na-Montmorillonite and Thyme Oil@Organo-Modified Montmorillonite Nanostructures on the Development of Melt-Extruded Poly-L-lactic Acid Antioxidant Active Packaging Films. Molecules 2022; 27:molecules27041231. [PMID: 35209022 PMCID: PMC8875974 DOI: 10.3390/molecules27041231] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 02/08/2022] [Accepted: 02/09/2022] [Indexed: 12/04/2022] Open
Abstract
Today, the use of natural biodegradable materials in the production processes is more and more adopted by industry to achieve cyclic economy targets and to improve environmental and human health indexes. Active packaging is the latest trend for food preservation. In this work, nanostructures were prepared by incorporation of thyme oil with natural natrium-montmorillonite and organo-montmorillonite with two different techniques, direct impregnation and the green evaporation–adsorption process. Such nanostructures were mixed with poly-L-lactic-acid for the first time via an extrusion molding process to develop a new packaging film. Comparisons of morphological, mechanical, and other basic properties for food packaging were carried out via XRD, FTIR, TG, SEM/EDS, oxygen and water vapor permeation, and antimicrobial and antioxidant activity for the first time. Results showed that poly-L-lactic-acid could be modified with clays and essential oils to produce improved active packaging films. The final product exhibits food odor prevention characteristics and shelf-life extension capabilities, and it could be used for active packaging. The films based on OrgMt clay seems to be more promising, while the thyme oil addition improves their behavior as active packaging. The PLLA/3%TO@OrgMt and PLLA/5%TO@OrgMt films were qualified between the tested samples as the most promising materials for this purpose.
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Affiliation(s)
- Aris E. Giannakas
- Department of Food Science and Technology, University of Patras, 30100 Agrinio, Greece
- Correspondence: (A.E.G.); (C.E.S.); (C.P.)
| | - Constantinos E. Salmas
- Department of Material Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (M.B.); (A.K.); (A.A.)
- Correspondence: (A.E.G.); (C.E.S.); (C.P.)
| | - Areti Leontiou
- Laboratory of Food Technology, Department of Business Administration of Agricultural and Food Enterprises, University of Patras, 30100 Agrinio, Greece;
| | - Dimitrios Moschovas
- Department of Material Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (M.B.); (A.K.); (A.A.)
| | - Maria Baikousi
- Department of Material Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (M.B.); (A.K.); (A.A.)
| | - Eleni Kollia
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Zografou, 15771 Athens, Greece; (E.K.); (V.T.)
| | - Vasiliki Tsigkou
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Zografou, 15771 Athens, Greece; (E.K.); (V.T.)
| | - Anastasios Karakassides
- Department of Material Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (M.B.); (A.K.); (A.A.)
| | - Apostolos Avgeropoulos
- Department of Material Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (D.M.); (M.B.); (A.K.); (A.A.)
| | - Charalampos Proestos
- Laboratory of Food Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Zografou, 15771 Athens, Greece; (E.K.); (V.T.)
- Correspondence: (A.E.G.); (C.E.S.); (C.P.)
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Liontos G, Manesi GM, Moutsios I, Moschovas D, Piryazev AA, Bersenev EA, Ivanov DA, Avgeropoulos A. Synthesis, Molecular Characterization, and Phase Behavior of Miktoarm Star Copolymers of the ABn and AnB (n = 2 or 3) Sequences, Where A Is Polystyrene and B Is Poly(dimethylsiloxane). Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01863] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- George Liontos
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece
| | - Gkreti-Maria Manesi
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece
| | - Ioannis Moutsios
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece
| | - Dimitrios Moschovas
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia
| | - Alexey A. Piryazev
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow, Russia
| | - Egor A. Bersenev
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow, Russia
| | - Dimitri A. Ivanov
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow, Russia
- Institut de Sciences des Matériaux de Mulhouse─IS2M, CNRS UMR7361, 15 Jean Starcky, 68057 Mulhouse, France
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia
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28
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Politakos N, Moutsios I, Manesi GM, Moschovas D, Abukaev AF, Nikitina EA, Kortaberria G, Ivanov DA, Avgeropoulos A. Synthesis, Characterization and Structure Properties of Biobased Hybrid Copolymers Consisting of Polydiene and Polypeptide Segments. Polymers (Basel) 2021; 13:3818. [PMID: 34771373 PMCID: PMC8588293 DOI: 10.3390/polym13213818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 10/29/2021] [Accepted: 11/01/2021] [Indexed: 11/16/2022] Open
Abstract
Novel hybrid materials of the PB-b-P(o-Bn-L-Tyr) and PI-b-P(o-Bn-L-Tyr) type (where PB: 1,4/1,2-poly(butadiene), PI: 3,4/1,2/1,4-poly(isoprene) and P(o-Bn-L-Tyr): poly(ortho-benzyl-L-tyrosine)) were synthesized through anionic and ring-opening polymerization under high-vacuum techniques. All final materials were molecularly characterized through infrared spectroscopy (IR) and proton and carbon nuclear magnetic resonance (1H-NMR, 13C-NMR) in order to confirm the successful synthesis and the polydiene microstructure content. The stereochemical behavior of secondary structures (α-helices and β-sheets) of the polypeptide segments combined with the different polydiene microstructures was also studied. The influence of the α-helices and β-sheets, as well as the polydiene chain conformations on the thermal properties (glass transition temperatures, thermal stability, α- and β-relaxation) of the present biobased hybrid copolymers, was investigated through differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and dielectric spectroscopy (DS). The obtained morphologies in thin films for all the synthesized materials via atomic force microscopy (AFM) indicated the formation of polypeptide fibrils in the polydiene matrix.
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Affiliation(s)
- Nikolaos Politakos
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.P.); (I.M.); (G.-M.M.); (D.M.)
- POLYMAT and Departamento de Química Aplicada, Facultad de Ciencias Químicas, University of the Basque Country UPV/EHU, Joxe Mari Korta Zentroa, Tolosa Etorbidea 72, 20018 San Sebastián, Spain
| | - Ioannis Moutsios
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.P.); (I.M.); (G.-M.M.); (D.M.)
| | - Gkreti-Maria Manesi
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.P.); (I.M.); (G.-M.M.); (D.M.)
| | - Dimitrios Moschovas
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.P.); (I.M.); (G.-M.M.); (D.M.)
| | - Ainur F. Abukaev
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia; (A.F.A.); (E.A.N.); (D.A.I.)
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Moscow, Russia
| | - Evgeniia A. Nikitina
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia; (A.F.A.); (E.A.N.); (D.A.I.)
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Moscow, Russia
| | - Galder Kortaberria
- ‘Materials + Tecnologies’ Research Group, Chemistry and Environmental Engineering Department, Faculty of Engineering, University of the Basque Country (UPV/EHU), Plaza Europa 1, 20018 Donostia, Spain;
| | - Dimitri A. Ivanov
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia; (A.F.A.); (E.A.N.); (D.A.I.)
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432 Moscow, Russia
- Institut de Sciences des Matériaux de Mulhouse–IS2M, CNRS UMR7361, 15 Jean Starcky, 68057 Mulhouse, France
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.P.); (I.M.); (G.-M.M.); (D.M.)
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia; (A.F.A.); (E.A.N.); (D.A.I.)
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Fotiadou R, Chatzikonstantinou AV, Hammami MA, Chalmpes N, Moschovas D, Spyrou K, Polydera AC, Avgeropoulos A, Gournis D, Stamatis H. Green Synthesized Magnetic Nanoparticles as Effective Nanosupport for the Immobilization of Lipase: Application for the Synthesis of Lipophenols. Nanomaterials (Basel) 2021; 11:458. [PMID: 33670153 PMCID: PMC7916844 DOI: 10.3390/nano11020458] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 02/03/2021] [Accepted: 02/08/2021] [Indexed: 11/16/2022]
Abstract
In this work, hybrid zinc oxide-iron oxide (ZnOFe) magnetic nanoparticles were synthesized employing Olea europaea leaf aqueous extract as a reducing/chelating and capping medium. The resulting magnetic nanoparticles were characterized by basic spectroscopic and microscopic techniques, namely, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), fourier-transform infrared (FTIR) and atomic force microscopy (AFM), exhibiting a spherical shape, average size of 15-17 nm, and a functionalized surface. Lipase from Thermomyces lanuginosus (TLL) was efficiently immobilized on the surface of ZnOFe nanoparticles through physical absorption. The activity of immobilized lipase was found to directly depend on the enzyme to support the mass ratio, and also demonstrated improved pH and temperature activity range compared to free lipase. Furthermore, the novel magnetic nanobiocatalyst (ZnOFe-TLL) was applied to the preparation of hydroxytyrosyl fatty acid esters, including derivatives with omega-3 fatty acids, in non-aqueous media. Conversion yields up to 90% were observed in non-polar solvents, including hydrophobic ionic liquids. Different factors affecting the biocatalyst performance were studied. ZnOFe-TLL was reutilized for eight subsequent cycles, exhibiting 90% remaining esterification activity (720 h of total operation at 50 °C). The green synthesized magnetic nanoparticles, reported here for the first time, are excellent candidates as nanosupports for the immobilization of enzymes with industrial interest, giving rise to nanobiocatalysts with elevated features.
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Affiliation(s)
- Renia Fotiadou
- Biotechnology Laboratory, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece; (R.F.); (A.V.C.); (A.C.P.)
| | - Alexandra V. Chatzikonstantinou
- Biotechnology Laboratory, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece; (R.F.); (A.V.C.); (A.C.P.)
| | - Mohamed Amen Hammami
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA;
| | - Nikolaos Chalmpes
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (D.M.); (K.S.); (A.A.); (D.G.)
| | - Dimitrios Moschovas
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (D.M.); (K.S.); (A.A.); (D.G.)
| | - Konstantinos Spyrou
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (D.M.); (K.S.); (A.A.); (D.G.)
| | - Angeliki C. Polydera
- Biotechnology Laboratory, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece; (R.F.); (A.V.C.); (A.C.P.)
| | - Apostolos Avgeropoulos
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (D.M.); (K.S.); (A.A.); (D.G.)
| | - Dimitrios Gournis
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (D.M.); (K.S.); (A.A.); (D.G.)
| | - Haralambos Stamatis
- Biotechnology Laboratory, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece; (R.F.); (A.V.C.); (A.C.P.)
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Ntetsikas K, Moschovas D, Zapsas G, Moutsios I, Tsitoni K, Manesi GM, Nabiullin AF, Hadjichristidis N, Ivanov DA, Avgeropoulos A. Synthesis, characterization and self-assembly of linear and miktoarm star copolymers of exclusively immiscible polydienes. Polym Chem 2021. [DOI: 10.1039/d1py00258a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Model linear PB1,4-b-PI3,4 and the corresponding miktoarm star copolymers PB1,4(PI3,4)n=2,3 were synthesized by anionic polymerization/selective chlorosilane chemistry, molecularly characterized and the morphological/thermal properties were reported.
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Chalmpes N, Bourlinos AB, Talande S, Bakandritsos A, Moschovas D, Avgeropoulos A, Karakassides MA, Gournis D. Nanocarbon from Rocket Fuel Waste: The Case of Furfuryl Alcohol-Fuming Nitric Acid Hypergolic Pair. Nanomaterials (Basel) 2020; 11:E1. [PMID: 33374901 PMCID: PMC7821927 DOI: 10.3390/nano11010001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/18/2020] [Accepted: 12/20/2020] [Indexed: 11/16/2022]
Abstract
In hypergolics two substances ignite spontaneously upon contact without external aid. Although the concept mostly applies to rocket fuels and propellants, it is only recently that hypergolics has been recognized from our group as a radically new methodology towards carbon materials synthesis. Comparatively to other preparative methods, hypergolics allows the rapid and spontaneous formation of carbon at ambient conditions in an exothermic manner (e.g., the method releases both carbon and energy at room temperature and atmospheric pressure). In an effort to further build upon the idea of hypergolic synthesis, herein we exploit a classic liquid rocket bipropellant composed of furfuryl alcohol and fuming nitric acid to prepare carbon nanosheets by simply mixing the two reagents at ambient conditions. Furfuryl alcohol served as the carbon source while fuming nitric acid as a strong oxidizer. On ignition the temperature is raised high enough to induce carbonization in a sort of in-situ pyrolytic process. Simultaneously, the released energy was directly converted into useful work, such as heating a liquid to boiling or placing Crookes radiometer into motion. Apart from its value as a new synthesis approach in materials science, carbon from rocket fuel additionally provides a practical way in processing rocket fuel waste or disposed rocket fuels.
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Affiliation(s)
- Nikolaos Chalmpes
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (D.M.); (A.A.); (M.A.K.)
| | | | - Smita Talande
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University in Olomouc, Slechtitelu 27, 779 00 Olomouc, Czech Republic; (S.T.); (A.B.)
- Department of Experimental Physics, Faculty of Science, Palacký University, 17. listopadu 1192/12, 779 00 Olomouc, Czech Republic
| | - Aristides Bakandritsos
- Regional Centre of Advanced Technologies and Materials, Faculty of Science, Palacky University in Olomouc, Slechtitelu 27, 779 00 Olomouc, Czech Republic; (S.T.); (A.B.)
| | - Dimitrios Moschovas
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (D.M.); (A.A.); (M.A.K.)
| | - Apostolos Avgeropoulos
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (D.M.); (A.A.); (M.A.K.)
| | - Michael A. Karakassides
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (D.M.); (A.A.); (M.A.K.)
| | - Dimitrios Gournis
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (D.M.); (A.A.); (M.A.K.)
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Rangou S, Moschovas D, Moutsios I, Manesi GM, Tsitoni K, Bovsunovskaya PV, Ivanov DA, Thomas EL, Avgeropoulos A. Dendrons and Dendritic Terpolymers: Synthesis, Characterization and Self-Assembly Comparison. Molecules 2020; 25:E6030. [PMID: 33352785 PMCID: PMC7766238 DOI: 10.3390/molecules25246030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 12/16/2020] [Accepted: 12/17/2020] [Indexed: 11/16/2022] Open
Abstract
To the best of our knowledge, this is the very first time that a thorough study of the synthetic procedures, molecular and thermal characterization, followed by structure/properties relationship for symmetric and non-symmetric second generation (2-G) dendritic terpolymers is reported. Actually, the synthesis of the non-symmetric materials is reported for the first time in the literature. Anionic polymerization enables the synthesis of well-defined polymers that, despite the architecture complexity, absolute control over the average molecular weight, as well as block composition, is achieved. The dendritic type macromolecular architecture affects the microphase separation, because different morphologies are obtained, which do not exhibit long range order, and various defects or dislocations are evident attributed to the increased number of junction points of the final material despite the satisfactory thermal annealing at temperatures above the highest glass transition temperature of all blocks. For comparison reasons, the initial dendrons (miktoarm star terpolymer precursors) which are connected to each other in order to synthesize the final dendritic terpolymers are characterized in solution and in bulk and their self-assembly is also studied. A major conclusion is that specific structures are adopted which depend on the type of the core connection between the ligand and the active sites of the dendrons.
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Affiliation(s)
- Sofia Rangou
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (S.R.); (D.M.); (I.M.); (G.-M.M.); (K.T.)
- Helmholtz-Zentrum Geesthacht, Institute of Polymer Research, Max-Plank-Str. 1, 21502 Geesthacht, Germany
| | - Dimitrios Moschovas
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (S.R.); (D.M.); (I.M.); (G.-M.M.); (K.T.)
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia; (P.V.B.); (D.A.I.)
| | - Ioannis Moutsios
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (S.R.); (D.M.); (I.M.); (G.-M.M.); (K.T.)
| | - Gkreti-Maria Manesi
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (S.R.); (D.M.); (I.M.); (G.-M.M.); (K.T.)
| | - Konstantina Tsitoni
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (S.R.); (D.M.); (I.M.); (G.-M.M.); (K.T.)
| | - Polina V. Bovsunovskaya
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia; (P.V.B.); (D.A.I.)
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow, Russia
| | - Dimitri A. Ivanov
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia; (P.V.B.); (D.A.I.)
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow, Russia
- Institut de Sciences des Matériaux de Mulhouse–IS2M, CNRS UMR7361, 15 Jean Starcky, 68057 Mulhouse, France
| | - Edwin L. Thomas
- Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843-3003, USA;
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (S.R.); (D.M.); (I.M.); (G.-M.M.); (K.T.)
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia; (P.V.B.); (D.A.I.)
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Miskaki C, Moutsios I, Manesi GM, Artopoiadis K, Chang CY, Bersenev EA, Moschovas D, Ivanov DA, Ho RM, Avgeropoulos A. Self-Assembly of Low-Molecular-Weight Asymmetric Linear Triblock Terpolymers: How Low Can We Go? Molecules 2020; 25:E5527. [PMID: 33255708 PMCID: PMC7728154 DOI: 10.3390/molecules25235527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 01/25/2023] Open
Abstract
The synthesis of two (2) novel triblock terpolymers of the ABC type and one (1) of the BAC type, where A, B and C are chemically different segments, such as polystyrene (PS), poly(butadiene) (PB1,4) and poly(dimethylsiloxane) (PDMS), is reported; moreover, their corresponding molecular and bulk characterizations were performed. Very low dimensions are evident from the characterization in bulk from transmission electron microscopy studies, verified by small-angle X-ray data, since sub-16 nm domains are evident in all three cases. The self-assembly results justify the assumptions that the high Flory-Huggins parameter, χ, even in low molecular weights, leads to significantly well-ordered structures, despite the complexity of the systems studied. Furthermore, it is the first time that a structure/properties relationship was studied for such systems in bulk, potentially leading to prominent applications in nanotechnology and nanopatterning, for as low as sub-10 nm thin-film manipulations.
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Affiliation(s)
- Christina Miskaki
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (C.M.); (I.M.); (G.-M.M.); (K.A.); (D.M.)
| | - Ioannis Moutsios
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (C.M.); (I.M.); (G.-M.M.); (K.A.); (D.M.)
| | - Gkreti-Maria Manesi
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (C.M.); (I.M.); (G.-M.M.); (K.A.); (D.M.)
| | - Konstantinos Artopoiadis
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (C.M.); (I.M.); (G.-M.M.); (K.A.); (D.M.)
| | - Cheng-Yen Chang
- Department of Chemical Engineering, National TsingHua University, Hsinchu 30013, Taiwan; (C.-Y.C.); (R.-M.H.)
| | - Egor A. Bersenev
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia; (E.A.B.); (D.A.I.)
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow, Russia
| | - Dimitrios Moschovas
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (C.M.); (I.M.); (G.-M.M.); (K.A.); (D.M.)
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia; (E.A.B.); (D.A.I.)
| | - Dimitri A. Ivanov
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia; (E.A.B.); (D.A.I.)
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow, Russia
- Institut de Sciences des Matériaux de Mulhouse–IS2M, CNRS UMR7361, 15 Jean Starcky, 68057 Mulhouse, France
| | - Rong-Ming Ho
- Department of Chemical Engineering, National TsingHua University, Hsinchu 30013, Taiwan; (C.-Y.C.); (R.-M.H.)
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (C.M.); (I.M.); (G.-M.M.); (K.A.); (D.M.)
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia; (E.A.B.); (D.A.I.)
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Papadopoulos S, Kazepidou E, Antonelou MH, Leondaritis G, Tsapinou A, Koulouras VP, Avgeropoulos A, Nakos G, Lekka ME. Secretory Phospholipase A 2-IIA Protein and mRNA Pools in Extracellular Vesicles of Bronchoalveolar Lavage Fluid from Patients with Early Acute Respiratory Distress Syndrome: A New Perception in the Dissemination of Inflammation? Pharmaceuticals (Basel) 2020; 13:ph13110415. [PMID: 33238426 PMCID: PMC7700412 DOI: 10.3390/ph13110415] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 11/19/2020] [Accepted: 11/20/2020] [Indexed: 01/08/2023] Open
Abstract
Secretory phospholipase-IIA A2 (sPLA2-IIA) is expressed in a variety of cell types under inflammatory conditions. Its presence in the bronchoalveolar lavage (BAL) fluid of patients with acute respiratory distress syndrome (ARDS) is associated with the severity of the injury. Exosomal type extracellular vesicles, (EVs), are recognized to perform intercellular communication. They may alter the immune status of recipient target cells through cargo shuttling. In this work, we characterized the exosomal type EVs isolated from BAL fluid of patients with early and late ARDS as compared to control/non-ARDS patients, through morphological (confocal and electron microscopy) and biochemical (dynamic light scattering, qRT-PCR, immunoblotting) approaches. We provide evidence for the presence of an sPLA2-IIA-carrying EV pool that coprecipitates with exosomes in the BAL fluid of patients with ARDS. PLA2G2A mRNA was present in all the samples, although more prominently expressed in early ARDS. However, the protein was found only in EVs from early phase ARDS. Under both forms, sPLA2-IIA might be involved in inflammatory responses of recipient lung cells during ARDS. The perception of the association of sPLA2-IIA to the early diagnosis of ARDS or even with a mechanism of development and propagation of lung inflammation can help in the adoption of appropriate and innovative therapeutic strategies.
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Affiliation(s)
- Stylianos Papadopoulos
- Laboratory of Biochemistry, Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece; (S.P.); (E.K.); (A.T.)
| | - Eleftheria Kazepidou
- Laboratory of Biochemistry, Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece; (S.P.); (E.K.); (A.T.)
| | - Marianna H. Antonelou
- Section of Cell Biology & Biophysics, Department of Biology, School of Science, National and Kapodistrian University of Athens (NKUA), Panepistimioupolis, 15784 Athens, Greece;
| | - George Leondaritis
- Laboratory of Pharmacology, School of Medicine, University of Ioannina, 451 10 Ioannina, Greece;
| | - Alexia Tsapinou
- Laboratory of Biochemistry, Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece; (S.P.); (E.K.); (A.T.)
| | - Vasilios P. Koulouras
- Department of Intensive Care Medicine, School of Medicine, University of Ioannina, 451 10 Ioannina, Greece; (V.P.K.); (G.N.)
| | | | - George Nakos
- Department of Intensive Care Medicine, School of Medicine, University of Ioannina, 451 10 Ioannina, Greece; (V.P.K.); (G.N.)
| | - Marilena E. Lekka
- Laboratory of Biochemistry, Department of Chemistry, University of Ioannina, 451 10 Ioannina, Greece; (S.P.); (E.K.); (A.T.)
- Correspondence: ; Tel.: +30-6972247374
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Moschovas D, Manesi GM, Karydis-Messinis A, Zapsas G, Ntetsikas K, Zafeiropoulos NE, Piryazev AA, Thomas EL, Hadjichristidis N, Ivanov DA, Avgeropoulos A. Alternating Gyroid Network Structure in an ABC Miktoarm Terpolymer Comprised of Polystyrene and Two Polydienes. Nanomaterials (Basel) 2020; 10:E1497. [PMID: 32751589 PMCID: PMC7466615 DOI: 10.3390/nano10081497] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 07/21/2020] [Accepted: 07/23/2020] [Indexed: 01/11/2023]
Abstract
The synthesis, molecular and morphological characterization of a 3-miktoarm star terpolymer of polystyrene (PS, M¯n = 61.0 kg/mol), polybutadiene (PB, M¯n = 38.2 kg/mol) and polyisoprene (PI, M¯n = 29.2 kg/mol), corresponding to volume fractions (φ) of 0.46, 0.31 and 0.23 respectively, was studied. The major difference of the present material from previous ABC miktoarm stars (which is a star architecture bearing three different segments, all connected to a single junction point) with the same block components is the high 3,4-microstructure (55%) of the PI chains. The interaction parameter and the degree of polymerization of the two polydienes is sufficiently positive to create a three-phase microdomain structure as evidenced by differential scanning calorimetry and transmission electron microscopy (TEM). These results in combination with small-angle X-ray scattering (SAXS) and birefringence experiments suggest a cubic tricontinuous network structure, based on the I4132 space group never reported previously for such an architecture.
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Affiliation(s)
- Dimitrios Moschovas
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (D.M.); (G.-M.M.); (A.K.-M.); (N.E.Z.)
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia;
| | - Gkreti-Maria Manesi
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (D.M.); (G.-M.M.); (A.K.-M.); (N.E.Z.)
| | - Andreas Karydis-Messinis
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (D.M.); (G.-M.M.); (A.K.-M.); (N.E.Z.)
| | - George Zapsas
- Physical Sciences and Engineering Division, KAUST Catalysis Center, Polymer Synthesis Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia; (G.Z.); (K.N.); (N.H.)
| | - Konstantinos Ntetsikas
- Physical Sciences and Engineering Division, KAUST Catalysis Center, Polymer Synthesis Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia; (G.Z.); (K.N.); (N.H.)
| | - Nikolaos E. Zafeiropoulos
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (D.M.); (G.-M.M.); (A.K.-M.); (N.E.Z.)
| | - Alexey A. Piryazev
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow, Russia;
- Institut de Sciences des Matériaux de Mulhouse—IS2M, CNRS UMR7361, 15 Jean Starcky, 68057 Mulhouse, France
| | - Edwin L. Thomas
- Department of Materials Science and NanoEngineering, Rice University, Houston, TX 77030, USA;
| | - Nikos Hadjichristidis
- Physical Sciences and Engineering Division, KAUST Catalysis Center, Polymer Synthesis Laboratory, King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia; (G.Z.); (K.N.); (N.H.)
| | - Dimitri A. Ivanov
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia;
- Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, 142432 Moscow, Russia;
- Institut de Sciences des Matériaux de Mulhouse—IS2M, CNRS UMR7361, 15 Jean Starcky, 68057 Mulhouse, France
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, University Campus-Dourouti, 45110 Ioannina, Greece; (D.M.); (G.-M.M.); (A.K.-M.); (N.E.Z.)
- Faculty of Chemistry, Lomonosov Moscow State University (MSU), GSP-1, 1-3 Leninskiye Gory, 119991 Moscow, Russia;
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Chalmpes N, Spyrou K, Vasilopoulos KC, Bourlinos AB, Moschovas D, Avgeropoulos A, Gioti C, Karakassides MA, Gournis D. Hypergolics in Carbon Nanomaterials Synthesis: New Paradigms and Perspectives. Molecules 2020; 25:molecules25092207. [PMID: 32397274 PMCID: PMC7249011 DOI: 10.3390/molecules25092207] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 05/04/2020] [Accepted: 05/06/2020] [Indexed: 11/23/2022] Open
Abstract
Recently we have highlighted the importance of hypergolic reactions in carbon materials synthesis. In an effort to expand this topic with additional new paradigms, herein we present novel preparations of carbon nanomaterials, such-like carbon nanosheets and fullerols (hydroxylated fullerenes), through spontaneous ignition of coffee-sodium peroxide (Na2O2) and C60-Na2O2 hypergolic mixtures, respectively. In these cases, coffee and fullerenes played the role of the combustible fuel, whereas sodium peroxide the role of the strong oxidizer (e.g., source of highly concentrated H2O2). The involved reactions are both thermodynamically and kinetically favoured, thus allowing rapid product formation at ambient conditions. In addition, we provide tips on how to exploit the released energy of such highly exothermic reactions in the generation of useful work.
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Affiliation(s)
- Nikolaos Chalmpes
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (K.C.V.); (D.M.); (A.A.); (C.G.); (M.A.K.)
| | - Konstantinos Spyrou
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (K.C.V.); (D.M.); (A.A.); (C.G.); (M.A.K.)
| | - Konstantinos C. Vasilopoulos
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (K.C.V.); (D.M.); (A.A.); (C.G.); (M.A.K.)
| | - Athanasios B. Bourlinos
- Physics Department, University of Ioannina, 45110 Ioannina, Greece
- Correspondence: (A.B.B.); (D.G.); Tel.: +30-26510-07141 (D.G.)
| | - Dimitrios Moschovas
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (K.C.V.); (D.M.); (A.A.); (C.G.); (M.A.K.)
| | - Apostolos Avgeropoulos
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (K.C.V.); (D.M.); (A.A.); (C.G.); (M.A.K.)
| | - Christina Gioti
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (K.C.V.); (D.M.); (A.A.); (C.G.); (M.A.K.)
| | - Michael A. Karakassides
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (K.C.V.); (D.M.); (A.A.); (C.G.); (M.A.K.)
| | - Dimitrios Gournis
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (K.C.V.); (D.M.); (A.A.); (C.G.); (M.A.K.)
- Correspondence: (A.B.B.); (D.G.); Tel.: +30-26510-07141 (D.G.)
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Chalmpes N, Asimakopoulos G, Spyrou K, Vasilopoulos KC, Bourlinos AB, Moschovas D, Avgeropoulos A, Karakassides MA, Gournis D. Functional Carbon Materials Derived through Hypergolic Reactions at Ambient Conditions. Nanomaterials (Basel) 2020; 10:nano10030566. [PMID: 32245030 PMCID: PMC7153381 DOI: 10.3390/nano10030566] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 03/07/2020] [Accepted: 03/16/2020] [Indexed: 12/04/2022]
Abstract
Carbon formation from organic precursors is an energy-consuming process that often requires the heating of a precursor in an oven at elevated temperature. In this paper, we present a conceptually different synthesis pathway for functional carbon materials based on hypergolic mixtures, i.e., mixtures that spontaneously ignite at ambient conditions once its ingredients contact each other. The reactions involved in such mixtures are highly exothermic, giving-off sizeable amounts of energy; hence, no any external heat source is required for carbonization, thus making the whole process more energy-liberating than energy-consuming. The hypergolic mixtures described here contain a combustible organic solid, such as nitrile rubber or a hydrazide derivative, and fuming nitric acid (100% HNO3) as a strong oxidizer. In the case of the nitrile rubber, carbon nanosheets are obtained, whereas in the case of the hydrazide derivative, photoluminescent carbon dots are formed. We also demonstrate that the energy released from these hypergolic reactions can serve as a heat source for the thermal conversion of certain triazine-based precursors into graphitic carbon nitride. Finally, certain aspects of the derived functional carbons in waste removal are also discussed.
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Affiliation(s)
- Nikolaos Chalmpes
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (G.A.); (K.S.); (K.C.V.); (D.M.); (A.A.); (M.A.K.)
| | - Georgios Asimakopoulos
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (G.A.); (K.S.); (K.C.V.); (D.M.); (A.A.); (M.A.K.)
| | - Konstantinos Spyrou
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (G.A.); (K.S.); (K.C.V.); (D.M.); (A.A.); (M.A.K.)
| | - Konstantinos C. Vasilopoulos
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (G.A.); (K.S.); (K.C.V.); (D.M.); (A.A.); (M.A.K.)
| | - Athanasios B. Bourlinos
- Physics Department, University of Ioannina, 45110 Ioannina, Greece
- Correspondence: (A.B.B.); (D.G.); Tel.: +30-265-100-7141 (D.G.)
| | - Dimitrios Moschovas
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (G.A.); (K.S.); (K.C.V.); (D.M.); (A.A.); (M.A.K.)
| | - Apostolos Avgeropoulos
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (G.A.); (K.S.); (K.C.V.); (D.M.); (A.A.); (M.A.K.)
| | - Michael A. Karakassides
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (G.A.); (K.S.); (K.C.V.); (D.M.); (A.A.); (M.A.K.)
| | - Dimitrios Gournis
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (G.A.); (K.S.); (K.C.V.); (D.M.); (A.A.); (M.A.K.)
- Correspondence: (A.B.B.); (D.G.); Tel.: +30-265-100-7141 (D.G.)
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Tzanidis I, Bairamis F, Sygellou L, Andrikopoulos KS, Avgeropoulos A, Konstantinou I, Tasis D. Rapid Microwave‐Assisted Synthesis of CdS/Graphene/MoS
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Tunable Heterojunctions and Their Application in Photocatalysis. Chemistry 2020; 26:6643-6651. [DOI: 10.1002/chem.202000131] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Indexed: 11/09/2022]
Affiliation(s)
| | - Feidias Bairamis
- Department of ChemistryUniversity of Ioannina Ioannina 45110 Greece
| | - Lamprini Sygellou
- Institute of Chemical Engineering SciencesFoundation of Research and Technology Hellas Rio Patras 26504 Greece
| | | | | | | | - Dimitrios Tasis
- Department of ChemistryUniversity of Ioannina Ioannina 45110 Greece
- Institute of Chemical Engineering SciencesFoundation of Research and Technology Hellas Rio Patras 26504 Greece
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Chalmpes N, Spyrou K, Bourlinos AB, Moschovas D, Avgeropoulos A, Karakassides MA, Gournis D. Synthesis of Highly Crystalline Graphite from Spontaneous Ignition of In Situ Derived Acetylene and Chlorine at Ambient Conditions. Molecules 2020; 25:E297. [PMID: 31940837 PMCID: PMC7024288 DOI: 10.3390/molecules25020297] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/07/2020] [Accepted: 01/09/2020] [Indexed: 11/17/2022] Open
Abstract
We exploited a classic chemistry demonstration experiment based on the reaction of acetylene with chlorine to obtain highly crystalline graphite at ambient conditions. Acetylene and chlorine were generated in-situ by the addition of calcium carbide (CaC2) in a concentrated HCl solution, followed by the quick addition of domestic bleach (NaClO). The released gases reacted spontaneously, giving bursts of yellow flame, leaving highly crystalline graphite deposits in the aqueous phase. This was a rather benign alternative towards synthetic graphite, the latter usually being prepared at high temperatures. The synthetic graphite was further utilized to obtain graphene or conductive inks.
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Affiliation(s)
- Nikolaos Chalmpes
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (D.M.); (A.A.); (M.A.K.)
| | - Konstantinos Spyrou
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (D.M.); (A.A.); (M.A.K.)
| | | | - Dimitrios Moschovas
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (D.M.); (A.A.); (M.A.K.)
| | - Apostolos Avgeropoulos
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (D.M.); (A.A.); (M.A.K.)
| | - Michael A. Karakassides
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (D.M.); (A.A.); (M.A.K.)
| | - Dimitrios Gournis
- Department of Materials Science & Engineering, University of Ioannina, 45110 Ioannina, Greece; (N.C.); (K.S.); (D.M.); (A.A.); (M.A.K.)
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Syranidou E, Karkanorachaki K, Amorotti F, Avgeropoulos A, Kolvenbach B, Zhou NY, Fava F, Corvini PFX, Kalogerakis N. Biodegradation of mixture of plastic films by tailored marine consortia. J Hazard Mater 2019; 375:33-42. [PMID: 31039462 DOI: 10.1016/j.jhazmat.2019.04.078] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 04/19/2019] [Accepted: 04/23/2019] [Indexed: 06/09/2023]
Abstract
This work sheds light on the physicochemical changes of naturally weathered polymer surfaces along with changes of polymer buoyancy due to biofilm formation and degradation processes. To support the degradation hypothesis, a microcosm experiment was conducted where a mixture of naturally weathered plastic pieces was incubated with an indigenous pelagic community. A series of analyses were employed in order to describe the alteration of the physicochemical characteristics of the polymer (FTIR, SEC and GPC, sinking velocity) as well as the biofilm community (NGS). At the end of phase II, the fraction of double bonds in the surface of microbially treated PE films increased while changes were also observed in the profile of the PS films. The molecular weight of PE pieces increased with incubation time reaching the molecular weight of the virgin pieces (230,000 g mol-1) at month 5 but the buoyancy displayed no difference throughout the experimental period. The number-average molecular weight of PS pieces decreased (33% and 27% in INDG and BIOG treatment respectively), implying chain scission; accelerated (by more than 30%) sinking velocities compared to the initial weathered pieces were also measured for PS films with biofilm on their surface. The orders Rhodobacterales, Oceanospirillales and Burkholderiales dominated the distinct platisphere communities and the genera Bacillus and Pseudonocardia discriminate these assemblages from the planktonic counterpart. The functional analysis predicts overrepresentation of adhesive cells carrying xenobiotic and hydrocarbon degradation genes. Taking these into account, we can suggest that tailored marine consortia have the ability to thrive in the presence of mixtures of plastics and participate in their degradation.
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Affiliation(s)
- Evdokia Syranidou
- School of Environmental Engineering, Technical University of Crete, Chania, Greece
| | | | - Filippo Amorotti
- School of Environmental Engineering, Technical University of Crete, Chania, Greece; Gruppo HERA srl, Bologna, Italy
| | | | - Boris Kolvenbach
- Institute for Ecopreneurship, School of Life Sciences, FHNW, Switzerland
| | - Ning-Yi Zhou
- Department of Microbial Sciences, State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai, China
| | - Fabio Fava
- Department of Civil, Chemical, Environmental and Materials Engineering (DICAM), University of Bologna, Bologna, Italy
| | | | - Nicolas Kalogerakis
- School of Environmental Engineering, Technical University of Crete, Chania, Greece; Department of Chemical Engineering, American University of Sharjah, Sharjah, United Arab Emirates.
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Fotiadou R, Patila M, Hammami MA, Enotiadis A, Moschovas D, Tsirka K, Spyrou K, Giannelis EP, Avgeropoulos A, Paipetis A, Gournis D, Stamatis H. Development of Effective Lipase-Hybrid Nanoflowers Enriched with Carbon and Magnetic Nanomaterials for Biocatalytic Transformations. Nanomaterials (Basel) 2019; 9:E808. [PMID: 31142000 PMCID: PMC6632025 DOI: 10.3390/nano9060808] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 05/19/2019] [Accepted: 05/23/2019] [Indexed: 01/10/2023]
Abstract
In the present study, hybrid nanoflowers (HNFs) based on copper (II) or manganese (II) ions were prepared by a simple method and used as nanosupports for the development of effective nanobiocatalysts through the immobilization of lipase B from Pseudozyma antarctica. The hybrid nanobiocatalysts were characterized by various techniques including scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), X-ray diffraction (XRD), Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR). The effect of the addition of carbon-based nanomaterials, namely graphene oxide and carbon nanotubes, as well as magnetic nanoparticles such as maghemite, on the structure, catalytic activity, and operational stability of the hybrid nanobiocatalysts was also investigated. In all cases, the addition of nanomaterials during the preparation of HNFs increased the catalytic activity and the operational stability of the immobilized biocatalyst. Lipase-based magnetic nanoflowers were effectively applied for the synthesis of tyrosol esters in non-aqueous media, such as organic solvents, ionic liquids, and environmental friendly deep eutectic solvents. In such media, the immobilized lipase preserved almost 100% of its initial activity after eight successive catalytic cycles, indicating that these hybrid magnetic nanoflowers can be applied for the development of efficient nanobiocatalytic systems.
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Affiliation(s)
- Renia Fotiadou
- Biotechnology Laboratory, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece.
| | - Michaela Patila
- Biotechnology Laboratory, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece.
| | - Mohamed Amen Hammami
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA.
| | - Apostolos Enotiadis
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA.
| | - Dimitrios Moschovas
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece.
| | - Kyriaki Tsirka
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece.
| | - Konstantinos Spyrou
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece.
| | - Emmanuel P Giannelis
- Department of Materials Science and Engineering, Cornell University, Ithaca, NY 14853, USA.
| | - Apostolos Avgeropoulos
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece.
| | - Alkiviadis Paipetis
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece.
| | - Dimitrios Gournis
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece.
| | - Haralambos Stamatis
- Biotechnology Laboratory, Department of Biological Applications and Technologies, University of Ioannina, 45110 Ioannina, Greece.
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Chochos CL, Spanos M, Katsouras A, Tatsi E, Drakopoulou S, Gregoriou VG, Avgeropoulos A. Current status, challenges and future outlook of high performance polymer semiconductors for organic photovoltaics modules. Prog Polym Sci 2019. [DOI: 10.1016/j.progpolymsci.2019.02.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Rokhlenko Y, Moschovas D, Miskaki C, Chan EP, Avgeropoulos A, Osuji CO. Creating Aligned Nanopores by Magnetic Field Processing of Block Copolymer/Homopolymer Blends. ACS Macro Lett 2019; 8:261-266. [PMID: 35650826 DOI: 10.1021/acsmacrolett.9b00043] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We describe the phase behavior of a cylinder-forming block copolymer (BCP)/homopolymer blend and the generation of aligned nanopores by a combination of magnetic field alignment and selective removal of the minority-block-miscible homopolymer. Alignment is achieved by cooling through the order-disorder transition temperature (Todt) in a 6 T field. The system is a blend of poly(styrene-block-4-vinylpyridine) (PS-b-P4VP) and poly(ethylene glycol) (PEG). PEG is miscible with P4VP and partitions preferentially into the cylindrical microdomains. Calorimetry and X-ray scattering show that Todt decreases linearly with PEG concentration until the onset of macrophase separation, inferred by PEG crystallization. Beyond this point, Todt is invariant with PEG content. Increasing PEG molar mass decreases the concentration at which macrophase separation is observed. Nanopore formation is confirmed by dye uptake experiments that show a clear dependence of dye uptake on PEG content before removal. We anticipate that this strategy can be extended to other BCP/homopolymer blends to produce nanoporous materials with reliable control of pore alignment and effective pore dimensions.
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Affiliation(s)
- Yekaterina Rokhlenko
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States
| | - Dimitrios Moschovas
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Christina Miskaki
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Edwin P. Chan
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
| | - Apostolos Avgeropoulos
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Chinedum O. Osuji
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States
- Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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Yilmaz M, Karanastasis AA, Chatziathanasiadou MV, Oguz M, Kougioumtzi A, Clemente N, Kellici TF, Zafeiropoulos NE, Avgeropoulos A, Mavromoustakos T, Dianzani U, Karakurt S, Tzakos AG. Inclusion of Quercetin in Gold Nanoparticles Decorated with Supramolecular Hosts Amplifies Its Tumor Targeting Properties. ACS Appl Bio Mater 2019; 2:2715-2725. [DOI: 10.1021/acsabm.8b00748] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Mustafa Yilmaz
- Department of Chemistry, Selcuk University, Konya 42075, Turkey
| | - Apostolos A. Karanastasis
- Department of Materials Science Engineering, University of Ioannina, University Campus, Ioannina 45110, Greece
| | - Maria V. Chatziathanasiadou
- Laboratory of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | - Mehmet Oguz
- Department of Chemistry, Selcuk University, Konya 42075, Turkey
- Department of Advance Material and Nanotechnology, Selcuk University, Konya 42075, Turkey
| | - Anastasia Kougioumtzi
- Department of Biomedical Research, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology-Hellas, University of Ioannina, Ioannina 45110, Greece
| | - Nausicaa Clemente
- Dipartimento di Scienze della Salute, Università del Piemonte Orientale, Novara 28100, Italy
| | - Tahsin F. Kellici
- Laboratory of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
| | - Nikolaos E. Zafeiropoulos
- Department of Materials Science Engineering, University of Ioannina, University Campus, Ioannina 45110, Greece
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, University Campus, Ioannina 45110, Greece
| | - Thomas Mavromoustakos
- Department of Chemistry, National and Kapodistrian University of Athens, Athens 15571, Greece
| | - Umberto Dianzani
- Dipartimento di Scienze della Salute, Università del Piemonte Orientale, Novara 28100, Italy
| | - Serdar Karakurt
- Department of Biochemistry, Selcuk University, Konya 42075, Turkey
| | - Andreas G. Tzakos
- Laboratory of Organic Chemistry and Biochemistry, Department of Chemistry, University of Ioannina, Ioannina 45110, Greece
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Chiu PT, Chien YC, Georgopanos P, Sun YS, Avgeropoulos A, Ho RM. Examination of well ordered nanonetwork materials by real- and reciprocal-space imaging. IUCrJ 2019; 6:259-266. [PMID: 30867923 PMCID: PMC6400199 DOI: 10.1107/s2052252518018389] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 12/28/2018] [Indexed: 06/09/2023]
Abstract
The development of well ordered nanonetwork materials (in particular gyroid-structured materials) has been investigated using a block-copolymer template for templated electroless plating as an example system for the examination of network formation using X-ray scattering. By taking advantage of the nucleation and growth mechanism of templated electroless plating, gyroid-structured Au was successfully fabricated through the development of Au nanoparticles, then tripods and branched tripods, and finally an ordered network. Each stage in the development of the network phase could then be examined by combining real-space transmission electron microscopy observations with reciprocal-space small-angle X-ray scattering results. The fingerprint scattering profile of the building block for the network (i.e. the tripod of the gyroid) could be well fitted with the form factor of an effective sphere, and the diffraction results from the ordered network could thus be reasonably addressed. As a result, the examination of well ordered network materials can be simplified as the scattering from the form factor of a sphere convoluted with the nodes of its structure factor, providing a facile method of identifying the network phases from X-ray scattering data.
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Affiliation(s)
- Po-Ting Chiu
- Department of Chemical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Yu-Cheng Chien
- Department of Chemical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
| | - Prokopios Georgopanos
- Department of Chemical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
- Department of Materials Science and Engineering, University of Ioannina, University Campus, Ioannina 45110, Greece
- Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Strasse 1, Geesthacht 21502, Germany
| | - Ya-Sen Sun
- Department of Chemical and Materials Engineering, National Central University, No. 300 Zhongda Road, Taoyuan 32001, Taiwan
| | - Apostolos Avgeropoulos
- Department of Materials Science and Engineering, University of Ioannina, University Campus, Ioannina 45110, Greece
| | - Rong-Ming Ho
- Department of Chemical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 30013, Taiwan
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Terzopoulou Z, Klonos PA, Kyritsis A, Tziolas A, Avgeropoulos A, Papageorgiou GZ, Bikiaris DN. Interfacial interactions, crystallization and molecular mobility in nanocomposites of Poly(lactic acid) filled with new hybrid inclusions based on graphene oxide and silica nanoparticles. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.01.041] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Wen T, Wang HF, Georgopanos P, Avgeropoulos A, Ho RM. Three-dimensional visualization of phase transition in polystyrene-block-polydimethylsiloxane thin film. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.01.047] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Tatsi E, Spanos M, Katsouras A, Squeo BM, Ibraikulov OA, Zimmermann N, Heiser T, Lévêque P, Gregoriou VG, Avgeropoulos A, Leclerc N, Chochos CL. Effect of Aryl Substituents and Fluorine Addition on the Optoelectronic Properties and Organic Solar Cell Performance of a High Efficiency Indacenodithienothiophene-alt
-Quinoxaline π-Conjugated Polymer. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201800418] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Elisavet Tatsi
- Department of Materials Science Engineering; University of Ioannina; Ioannina 45110 Greece
| | - Michael Spanos
- Department of Materials Science Engineering; University of Ioannina; Ioannina 45110 Greece
- National Hellenic Research Foundation; 48 Vassileos Constantinou Avenue Athens 11635 Greece
| | - Athanasios Katsouras
- Department of Materials Science Engineering; University of Ioannina; Ioannina 45110 Greece
| | - Benedetta M. Squeo
- Advent Technologies SA; Patras Science Park, Stadiou Street, Platani-Rio Patra 26504 Greece
| | - Olzhas A. Ibraikulov
- Laboratoire ICube; CNRS, Université de Strasbourg; UMR7357, 23 rue du Loess 67037 Strasbourg France
| | - Nicolas Zimmermann
- Laboratoire ICube; CNRS, Université de Strasbourg; UMR7357, 23 rue du Loess 67037 Strasbourg France
| | - Thomas Heiser
- Laboratoire ICube; CNRS, Université de Strasbourg; UMR7357, 23 rue du Loess 67037 Strasbourg France
| | - Patrick Lévêque
- Laboratoire ICube; CNRS, Université de Strasbourg; UMR7357, 23 rue du Loess 67037 Strasbourg France
| | - Vasilis G. Gregoriou
- National Hellenic Research Foundation; 48 Vassileos Constantinou Avenue Athens 11635 Greece
- Advent Technologies SA; Patras Science Park, Stadiou Street, Platani-Rio Patra 26504 Greece
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering; University of Ioannina; Ioannina 45110 Greece
| | - Nicolas Leclerc
- Institut de Chimie et Procédés pour l’Energie; l’Environnement et la Santé; Université de Strasbourg; Ecole Européenne de Chimie; Polymères et Matériaux; 25 rue Becquerel 67087 Strasbourg France
| | - Christos L. Chochos
- Department of Materials Science Engineering; University of Ioannina; Ioannina 45110 Greece
- Advent Technologies SA; Patras Science Park, Stadiou Street, Platani-Rio Patra 26504 Greece
- National Hellenic Research Foundation; Institute of Biology; Medicinal Chemistry & Biotechnology; 48 Vassileos Constantinou Avenue Athens 11635 Greece
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Nerantzaki M, Skoufa E, Adam KV, Nanaki S, Avgeropoulos A, Kostoglou M, Bikiaris D. Amphiphilic Block Copolymer Microspheres Derived from Castor Oil, Poly(ε-carpolactone), and Poly(ethylene glycol): Preparation, Characterization and Application in Naltrexone Drug Delivery. Materials (Basel) 2018; 11:E1996. [PMID: 30332793 PMCID: PMC6213069 DOI: 10.3390/ma11101996] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 10/12/2018] [Accepted: 10/12/2018] [Indexed: 11/16/2022]
Abstract
In the present study, the newly synthesized castor oil-derived thioether-containing ω-hydroxyacid (TEHA) block copolymers with polycaprolactone (TEHA-b-PCL), with methoxypoly(ethylene glycol) (mPEG), (TEHA-b-mPEG) and with poly(ethylene glycol) (PEG) (TEHA-b-PEG-b-TEHA), were investigated as polymeric carriers for fabrication of naltrexone (NLX)-loaded microspheres by the single emulsion solvent evaporation technique. These microspheres are appropriate for the long-term treatment of opioid/alcohol dependence. Physical properties of the obtained microspheres were characterized in terms of size, morphology, drug loading capacity, and drug release. A scanning electron microscopy study revealed that the desired NLX-loaded uniform microspheres with a mean particle size of 5⁻10 µm were obtained in all cases. The maximum percentage encapsulation efficiency was found to be about 25.9% for the microspheres obtained from the TEHA-b-PEG-b-TEHA copolymer. Differential scanning calorimetry and X-ray diffractometry analysis confirmed the drug entrapment within microspheres in the amorphous state. In vitro dissolution studies revealed that all NLX-loaded formulations had a similar drug release profile: An initial burst release after 24 h, followed by a sustained and slower drug release for up to 50 days. The analysis of the release kinetic data, which were fitted into the Korsmeyer⁻Peppas release model, indicated that diffusion is the main release mechanism of NLX from TEHA-b-PCL and TEHA-b-mPEG microspheres, while microspheres obtained from TEHA-b-PEG-b-TEHA exhibited a drug release closer to an erosion process.
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Affiliation(s)
- Maria Nerantzaki
- Physicochemistry Laboratory of Electrolytes and Interfacial Nanosystems (PHENIX), UMR CNRS 8234, Faculty of Science and Engineering, Sorbonne University, 75252 Paris CEDEX 05, France.
- Laboratory of Chemistry and Technology of Polymers and Dyes, Chemistry Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Eirini Skoufa
- Laboratory of Polymeric Materials, Department of Materials Science and Engineering, University of Ioannina, Administration Building, University Campus Dourouti, 45110 Ioannina, Greece.
| | - Kyriakos-Vasileios Adam
- Laboratory of Chemistry and Technology of Polymers and Dyes, Chemistry Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Stavroula Nanaki
- Laboratory of Chemistry and Technology of Polymers and Dyes, Chemistry Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Apostolos Avgeropoulos
- Laboratory of Polymeric Materials, Department of Materials Science and Engineering, University of Ioannina, Administration Building, University Campus Dourouti, 45110 Ioannina, Greece.
| | - Margaritis Kostoglou
- Laboratory of General and Inorganic Chemical Technology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Dimitrios Bikiaris
- Laboratory of Chemistry and Technology of Polymers and Dyes, Chemistry Department, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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50
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Lu KY, Wang HF, Lin JW, Chuang WT, Georgopanos P, Avgeropoulos A, Shi AC, Ho RM. Self-Alignment of Cylinder-Forming Silicon-Containing Block Copolymer Films. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01643] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kai-Yuan Lu
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, R.O.C
| | - Hsiao-Fang Wang
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, R.O.C
| | - Jheng-Wei Lin
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, R.O.C
| | - Wei-Tsung Chuang
- National Synchrotron
Radiation Research Center, Hsinchu 30076, Taiwan
| | - Prokopios Georgopanos
- Department of Materials Science Engineering, University of Ioannina, University Campus, Ioannina 45110, Greece
| | - Apostolos Avgeropoulos
- Department of Materials Science Engineering, University of Ioannina, University Campus, Ioannina 45110, Greece
| | - An-Chang Shi
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4L8, Canada
| | - Rong-Ming Ho
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, R.O.C
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