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Hirao R, Takeuchi H, Kawada J, Ishida N. Polypropylene-Rendered Antiviral by Three-Dimensionally Surface-Grafted Poly( N-benzyl-4-vinylpyridinium bromide). ACS Appl Mater Interfaces 2024; 16:10590-10600. [PMID: 38343039 PMCID: PMC10910468 DOI: 10.1021/acsami.3c15125] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/28/2023] [Accepted: 02/02/2024] [Indexed: 03/01/2024]
Abstract
To inhibit viral infection, it is necessary for the surface of polypropylene (PP), a polymer of significant industrial relevance, to possess biocidal properties. However, due to its low surface energy, PP weakly interacts with other organic molecules. The biocidal effects of quaternary ammonium compounds (QACs) have inspired the development of nonwoven PP fibers with surface-bound quaternary ammonium (QA). Despite this advancement, there is limited knowledge regarding the durability of these coatings against scratching and abrasion. It is hypothesized that the durability could be improved if the thickness of the coating layer were controlled and increased. We herein functionalized PP with three-dimensionally surface-grafted poly(N-benzyl-4-vinylpyridinium bromide) (PBVP) by a simple and rapid method involving graft polymerization and benzylation and examined the influence of different factors on the antiviral effect of the resulting plastic by using a plaque assay. The thickness of the PBVP coating, surface roughness, and amount of QACs, which jointly determine biocidal activity, could be controlled by adjusting the duration and intensity of the ultraviolet irradiation used for grafting. The best-performing sample reduced the viral infection titer of an enveloped model virus (bacteriophage ϕ6) by approximately 5 orders of magnitude after 60 min of contact and retained its antiviral activity after surface polishing-simulated scratching and abrasion, which indicated the localization of QACs across the coating interior. Our method may expand the scope of application to resin plates as well as fibers of PP. Given that the developed approach is not limited to PP and may be applied to other low-surface-energy olefinic polymers such as polyethylene and polybutene, our work paves the way for the fabrication of a wide range of biocidal surfaces for use in diverse environments, helping to prevent viral infection.
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Affiliation(s)
- Rie Hirao
- Toyota
Central R&D Labs, Inc., Nagakute, Aichi 480-1192, Japan
| | - Hisato Takeuchi
- Toyota
Central R&D Labs, Inc., Nagakute, Aichi 480-1192, Japan
| | - Jumpei Kawada
- Toyota
Central R&D Labs, Inc., Nagakute, Aichi 480-1192, Japan
| | - Nobuhiro Ishida
- Toyota
Central R&D Labs, Inc., Nagakute, Aichi 480-1192, Japan
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Guo PX, Wang XG, Yang MQ, Wang JX, Meng FJ. Preparation and Oil Adsorption of Cellulose- graft-poly(butyl acrylate- N, N'-methylene Bisacrylamide). Materials (Basel) 2024; 17:325. [PMID: 38255493 PMCID: PMC10817525 DOI: 10.3390/ma17020325] [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: 12/11/2023] [Revised: 12/31/2023] [Accepted: 01/05/2024] [Indexed: 01/24/2024]
Abstract
With the advancement of industrial economies, incidents involving spills of petroleum products have become increasingly frequent. The resulting pollutants pose significant threats to air, water, soil, plant and animal survival, as well as human health. In this study, microcrystalline cellulose served as the matrix and benzoyl peroxide (BPO) as the initiator, while butyl acrylate (BA) and N,N'-methylene bisacrylamide (MBA) were employed as graft monomers. Through free radical graft polymerization, cellulose-graft-poly(butyl acrylate-N,N'-methylene bisacrylamide) [Cell-g-P(BA-MBA)], possessing oil-adsorbing properties, was synthesized. The chemical structure, elemental composition, surface morphology and wetting properties of the graft polymerization products have been characterized, using infrared spectroscopy, elemental analysis, scanning electron microscopy and contact angle testing. The adsorption properties of Cell-g-P(BA-MBA) for various organic solvents and oils were then assessed. The experimental results demonstrated that Cell-g-P(BA-MBA) exhibited a maximum adsorption capacity of 37.55 g/g for trichloromethane. Adsorption kinetics experiments indicated a spontaneous and exothermic process involving physical adsorption, conforming to the Freundlich isotherm model. Furthermore, adsorption kinetics experiments revealed that Cell-g-P(BA-MBA) displayed favorable reuse and regeneration performance, maintaining its adsorption capacity essentially unchanged over fifteen adsorption-desorption cycles.
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Affiliation(s)
- Peng-Xiang Guo
- Marine College, Shandong University, Weihai 264200, China
| | - Xin-Gang Wang
- Marine College, Shandong University, Weihai 264200, China
| | - Mao-Qian Yang
- Marine College, Shandong University, Weihai 264200, China
| | - Jian-Xin Wang
- Marine College, Shandong University, Weihai 264200, China
| | - Fan-Jun Meng
- Marine College, Shandong University, Weihai 264200, China
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Smirnov MA, Vorobiov VK, Fedotova VS, Sokolova MP, Bobrova NV, Smirnov NN, Borisov OV. A Polyelectrolyte Colloidal Brush Based on Cellulose: Perspectives for Future Applications. Polymers (Basel) 2023; 15:4526. [PMID: 38231953 PMCID: PMC10708233 DOI: 10.3390/polym15234526] [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: 10/07/2023] [Revised: 11/10/2023] [Accepted: 11/22/2023] [Indexed: 01/19/2024] Open
Abstract
This feature article is devoted to the evaluation of different techniques for producing colloidal polyelectrolyte brushes (CPEBs) based on cellulose nanofibers modified with grafted polyacrylates. The paper also reviews the potential applications of these CPEBs in designing electrode materials and as reinforcing additives. Additionally, we discuss our own perspectives on investigating composites with CPEBs. Herein, polyacrylic acid (PAA) was grafted onto the surface of cellulose nanofibers (CNFs) employing a "grafting from" approach. The effect of the PAA shell on the morphological structure of a composite with polypyrrole (PPy) was investigated. The performance of as-obtained CNF-PAA/PPy as organic electrode material for supercapacitors was examined. Furthermore, this research highlights the ability of CNF-PAA filler to act as an additional crosslinker forming a physical sub-network due to the hydrogen bond interaction inside chemically crosslinked polyacrylamide (PAAm) hydrogels. The enhancement of the mechanical properties of the material with a concomitant decrease in its swelling ratio compared to a pristine PAAm hydrogel was observed. The findings were compared with the recent theoretical foundation pertaining to other similar materials.
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Affiliation(s)
- Michael A. Smirnov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi Pr. 31, 199004 St. Petersburg, Russia; (V.K.V.); (V.S.F.); (M.P.S.); (N.V.B.); (N.N.S.)
| | - Vitaly K. Vorobiov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi Pr. 31, 199004 St. Petersburg, Russia; (V.K.V.); (V.S.F.); (M.P.S.); (N.V.B.); (N.N.S.)
| | - Veronika S. Fedotova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi Pr. 31, 199004 St. Petersburg, Russia; (V.K.V.); (V.S.F.); (M.P.S.); (N.V.B.); (N.N.S.)
| | - Maria P. Sokolova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi Pr. 31, 199004 St. Petersburg, Russia; (V.K.V.); (V.S.F.); (M.P.S.); (N.V.B.); (N.N.S.)
| | - Natalya V. Bobrova
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi Pr. 31, 199004 St. Petersburg, Russia; (V.K.V.); (V.S.F.); (M.P.S.); (N.V.B.); (N.N.S.)
| | - Nikolay N. Smirnov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi Pr. 31, 199004 St. Petersburg, Russia; (V.K.V.); (V.S.F.); (M.P.S.); (N.V.B.); (N.N.S.)
| | - Oleg V. Borisov
- Institute of Macromolecular Compounds, Russian Academy of Sciences, V.O. Bolshoi Pr. 31, 199004 St. Petersburg, Russia; (V.K.V.); (V.S.F.); (M.P.S.); (N.V.B.); (N.N.S.)
- Institut des Sciences Analytiques et de Physico-Chimie pour l’Environnement et les Matériaux (IPREM), UMR 5254 CNRS/UPPA, 64053 Pau, France
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Frousiou E, Tonis E, Rotas G, Pantelia A, Chalkidis SG, Heliopoulos NS, Kagkoura A, Siamidis D, Galeou A, Prombona A, Stamatakis K, Boukos N, Vougioukalakis GC. Kevlar ®, Nomex ®, and VAR Modification by Small Organic Molecules Anchoring: Transfusing Antibacterial Properties and Improving Water Repellency. Molecules 2023; 28:5465. [PMID: 37513342 PMCID: PMC10385662 DOI: 10.3390/molecules28145465] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 06/14/2023] [Revised: 07/08/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
The surface modification of fabrics composed of Kevlar®, Nomex®, or VAR was extensively investigated. Kevlar® and Nomex® are widely-utilized aramid materials, whereas VAR is a technical fabric comprising 64% viscose, 24% para-aramid (Kevlar®), 10% polyamide, and 2% antistatic fibers. Both aramid materials and cellulose/viscose exhibit exceptional mechanical properties that render them valuable in a wide range of applications. For the herein studied modification of Kevlar®, Nomex®, and VAR, we used small organic molecules 3-allyl-5,5-dimethylhydantoin (ADMH) and 3-(acrylamidopropyl)trimethylammonium chloride (APTAC), which were anchored onto the materials under study via graft polymerization. By doing so, excellent antibacterial properties were induced in the three studied fabrics. Their water repellency was improved in most cases as well. Extensive characterization studies were conducted to probe the properties of the modified materials, employing Raman and FTIR spectroscopies, Scanning Electron Microscopy (SEM), and thermogravimetric analysis (TGA).
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Affiliation(s)
- Efrosyni Frousiou
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - Efstathios Tonis
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - Georgios Rotas
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece
- Laboratory of Organic Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | - Anna Pantelia
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - Savvas G Chalkidis
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece
| | - Nikolaos S Heliopoulos
- 700 Military Factory, Supreme Military Support Command, 50 Anapafseos, 18648 Piraeus, Greece
| | - Antonia Kagkoura
- Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vassileos Constantinou Avenue, 11635 Athens, Greece
| | | | - Angeliki Galeou
- Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Patriarchou Grigoriou E' & Neapoleos Str., 15341 Agia Paraskevi Attica, Greece
| | - Anastasia Prombona
- Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Patriarchou Grigoriou E' & Neapoleos Str., 15341 Agia Paraskevi Attica, Greece
| | - Kostas Stamatakis
- Institute of Biosciences and Applications, National Centre for Scientific Research "Demokritos", Patriarchou Grigoriou E' & Neapoleos Str., 15341 Agia Paraskevi Attica, Greece
| | - Nikos Boukos
- Institute of Nanoscience and Nanotechnology, National Centre for Scientific Research "Demokritos", Patriarchou Grigoriou E' & Neapoleos Str., 15341 Agia Paraskevi Attica, Greece
| | - Georgios C Vougioukalakis
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, 15771 Athens, Greece
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Ramesh P, Karla S, Alshehri A, Yu M, Kilduff J, Belfort G. Stiffening Polymer Brush Membranes for Enhanced Organic Solvent Nanofiltration Selectivity. ACS Appl Mater Interfaces 2023. [PMID: 37341440 DOI: 10.1021/acsami.3c04265] [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] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
Membrane-based separations allow energy-efficient purification of organic solvents which are typically carried out by energy-intensive distillation. Polymer membranes are inexpensive and have obtained widespread industrial acceptance for water and biotech applications but not organic solvent nanofiltration due to relatively low selectivities. In this work, a new class of polymer brush membranes was prepared with high selectivities for methanol-toluene separation. Stiffening the brush structure by cross-linking with aromatic trimesic acid and aliphatic itaconic acid resulted in an increase in selectivity from 1.4 to 6.5-11.5. This was achieved by graft polymerization of a primary amine monomer (aminoethyl methacrylate) using single electron transfer-living radical polymerization (SET-LRP) followed by cross-linking. Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and captive bubble contact angle measurements were used to characterize these membranes. The stiffness of the brush membranes was measured using a quartz crystal microbalance-dissipation (QCM-D) and correlated positively with selectivity for separating organic feed mixtures. This new class of membranes offers a tunable and scalable method for purification of organics.
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Affiliation(s)
- Pranav Ramesh
- Howard P. Isermann Department of Chemical and Biological Engineering and Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Surya Karla
- Howard P. Isermann Department of Chemical and Biological Engineering and Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Abdullah Alshehri
- Howard P. Isermann Department of Chemical and Biological Engineering and Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Miao Yu
- Department of Chemical and Biological Engineering, University at Buffalo, Buffalo, New York 14260, United States
| | - James Kilduff
- Civil and Environmental Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
| | - Georges Belfort
- Howard P. Isermann Department of Chemical and Biological Engineering and Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, New York 12180, United States
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Chalykh AE, Khasbiullin RR, Aliev AD, Matveev VV, Gerasimov VK, Slesarenko NA, Avilova IA, Volkov VI, Tverskoy VA. The Effect of Divinylbenzene on the Structure and Properties of Polyethylene Films with Related Radiation Chemical Grafted Polystyrene and Sulfocationite Membranes. Membranes (Basel) 2023; 13:587. [PMID: 37367791 DOI: 10.3390/membranes13060587] [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: 04/27/2023] [Revised: 05/29/2023] [Accepted: 06/05/2023] [Indexed: 06/28/2023]
Abstract
In the present work, the effect of divinylbenzene (DVB) on the kinetics of post-radiation chemical graft polymerization styrene (St) on polyethylene (PE) film and its structural and morphological features were investigated. It has been found that the dependence of the degree of polystyrene (PS) grafting on the DVB concentration in the solution is extreme. An increase in the rate of graft polymerization at low concentrations of DVB in the solution is associated with a decrease in the mobility of the growing chains of PS. A decrease in the rate of graft polymerization at high concentrations of DVB is associated with a decrease in the rate of diffusion of St and iron(II) ions in the cross-linked network structure of macromolecules of graft PS. A comparative analysis of the IR transmission and multiple attenuated total internal reflection spectra of the films with graft PS shows that graft polymerization of St in the presence of DVB leads to the enrichment of the film surface layers in PS. These results have been confirmed by the data on the distribution of sulfur in these films after sulfonation. The micrographs of the surface of the grafted films show the formation of cross-linked local microphases of PS with fixed interfaces.
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Affiliation(s)
- Anatoly E Chalykh
- Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences (RAS), Leninsky Pr. 31-4, 119071 Moscow, Russia
| | - Ramil R Khasbiullin
- Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences (RAS), Leninsky Pr. 31-4, 119071 Moscow, Russia
| | - Ali D Aliev
- Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences (RAS), Leninsky Pr. 31-4, 119071 Moscow, Russia
| | - Vladimir V Matveev
- Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences (RAS), Leninsky Pr. 31-4, 119071 Moscow, Russia
| | - Vladimir K Gerasimov
- Frumkin Institute of Physical Chemistry and Electrochemistry of Russian Academy of Sciences (RAS), Leninsky Pr. 31-4, 119071 Moscow, Russia
| | - Nikita A Slesarenko
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of Russian Academy of Sciences (RAS), 142432 Chernogolovka, Russia
| | - Irina A Avilova
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of Russian Academy of Sciences (RAS), 142432 Chernogolovka, Russia
| | - Vitaly I Volkov
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of Russian Academy of Sciences (RAS), 142432 Chernogolovka, Russia
| | - Vladimir A Tverskoy
- Lomonosov Institute of Fine Chemical Technologies, MIREA-Russian Technological University, 119454 Moscow, Russia
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Muslimova IB, Zhatkanbayeva ZK, Omertasov DD, Melnikova GB, Yeszhanov AB, Güven O, Chizhik SA, Zdorovets MV, Korolkov IV. Stimuli-Responsive Track-Etched Membranes for Separation of Water-Oil Emulsions. Membranes (Basel) 2023; 13:membranes13050523. [PMID: 37233585 DOI: 10.3390/membranes13050523] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 05/10/2023] [Accepted: 05/12/2023] [Indexed: 05/27/2023]
Abstract
In this work, we have developed a method for the preparation of pH-responsive track-etched membranes (TeMs) based on poly(ethylene terephthalate) (PET) with pore diameters of 2.0 ± 0.1 μm of cylindrical shape by RAFT block copolymerization of styrene (ST) and 4-vinylpyridine (4-VP) to be used in the separation of water-oil emulsions. The influence of the monomer concentration (1-4 vol%), the molar ratio of RAFT agent: initiator (1:2-1:100) and the grafting time (30-120 min) on the contact angle (CA) was studied. The optimal conditions for ST and 4-VP grafting were found. The obtained membranes showed pH-responsive properties: at pH 7-9, the membrane was hydrophobic with a CA of 95°; at pH 2, the CA decreased to 52°, which was due to the protonated grafted layer of poly-4-vinylpyridine (P4VP), which had an isoelectric point of pI = 3.2. The obtained membranes with controlled hydrophobic-hydrophilic properties were tested by separating the direct and reverse "oil-water" emulsions. The stability of the hydrophobic membrane was studied for 8 cycles. The degree of purification was in the range of 95-100%.
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Affiliation(s)
- Indira B Muslimova
- Laboratory of Engineering Profile, L.N. Gumilyov Eurasian National University, Satpaev Str., 5, Astana 010008, Kazakhstan
- The Institute of Nuclear Physics, Ibragimov Str., 1, Almaty 050032, Kazakhstan
| | - Zh K Zhatkanbayeva
- Laboratory of Engineering Profile, L.N. Gumilyov Eurasian National University, Satpaev Str., 5, Astana 010008, Kazakhstan
| | - Dias D Omertasov
- Laboratory of Engineering Profile, L.N. Gumilyov Eurasian National University, Satpaev Str., 5, Astana 010008, Kazakhstan
| | - Galina B Melnikova
- Laboratory of Engineering Profile, L.N. Gumilyov Eurasian National University, Satpaev Str., 5, Astana 010008, Kazakhstan
- A.V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus, P. Brovki Str., 15, 220072 Minsk, Belarus
| | - Arman B Yeszhanov
- Laboratory of Engineering Profile, L.N. Gumilyov Eurasian National University, Satpaev Str., 5, Astana 010008, Kazakhstan
- The Institute of Nuclear Physics, Ibragimov Str., 1, Almaty 050032, Kazakhstan
| | - Olgun Güven
- Department of Chemistry, Hacettepe University, Beytepe, Ankara 06800, Turkey
| | - Sergei A Chizhik
- A.V. Luikov Heat and Mass Transfer Institute of the National Academy of Sciences of Belarus, P. Brovki Str., 15, 220072 Minsk, Belarus
| | - Maxim V Zdorovets
- Laboratory of Engineering Profile, L.N. Gumilyov Eurasian National University, Satpaev Str., 5, Astana 010008, Kazakhstan
- The Institute of Nuclear Physics, Ibragimov Str., 1, Almaty 050032, Kazakhstan
- Department of Intelligent Information Technology, Ural Federal University, Mira Str. 19, 620002 Ekaterinburg, Russia
| | - Ilya V Korolkov
- Laboratory of Engineering Profile, L.N. Gumilyov Eurasian National University, Satpaev Str., 5, Astana 010008, Kazakhstan
- The Institute of Nuclear Physics, Ibragimov Str., 1, Almaty 050032, Kazakhstan
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Eguchi H, Hatano A, Yoshimi Y. Reagentless Sensing of Vancomycin Using an Indium Tin Oxide Electrode Grafted with Molecularly Imprinted Polymer including Ferrocenyl Group. Sensors (Basel) 2021; 21:8338. [PMID: 34960432 DOI: 10.3390/s21248338] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/03/2021] [Accepted: 12/10/2021] [Indexed: 11/17/2022]
Abstract
Vancomycin (VCM) is a first-line antimicrobial agent against methicillin-resistant Staphylococcus aureus, a cause of nosocomial infections. Therapeutic drug monitoring is strongly recommended for VCM-based chemotherapy. The authors attempted to develop a simple VCM sensor based on molecularly imprinted polymer (MIP), which can be used with simple operations. Methacrylic acid (MAA), acrylamide, methylenebisacrylamide, and allylamine carboxypropionate-3-ferrocene (ACPF) were copolymerized in the presence of VCM and grafted from the surface of indium-tin oxide (ITO) to obtain MIP-coated electrodes. The MIP-grafted ITO electrode was used for differential pulse voltammetry (DPV) measurements in a buffer solution containing VCM or whole bovine blood. The obtained current depends on the VCM concentration with high linearity. The dynamic range covered the therapeutic range (20–40 μg/mL) of the VCM but was almost insensitive to teicoplanin, which has a similar structure to VCM. The ITO electrodes grafted by the same procedure except for omitting either VCM or APCF were not sensitive to VCM. The sensitivity of the MIP electrodes to VCM in whole blood and buffered saline, but the background current in blood was higher than that in saline. This high background current was also seen in the deproteinized plasma. Thus, the current is probably originated from the oxidation of low molecular weight reducing agents in the blood. The MIP-grafted ITO electrode using ACPF as a functional monomer would be a promising highly selective sensor for real-time monitoring of VCM with proper correction of the background current.
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Wei Q, Chen X, Bai L, Zhao L, Huang Y, Liu Z. [Preparation of liquid crystal-based molecularly imprinted monolith and its molecular recognition thermodynamics]. Se Pu 2021; 39:1171-1181. [PMID: 34677012 PMCID: PMC9404140 DOI: 10.3724/sp.j.1123.2021.01017] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
液晶分子印迹聚合物(MIPs)因刚性液晶单体的加入而在超低交联度水平下也能印迹和识别模板分子,有效解决了传统MIPs因高交联度造成的位点包埋、结合容量低、传质慢等问题。尽管液晶MIPs具有如此独特的优势,但却面临着由于交联度的大幅度降低而导致印迹效果下降的问题。为了研究液晶MIPs的结合特性,制备具有良好印迹效果的低交联液晶MIPs,该文通过二次接枝聚合,制备了一系列不同交联度的液晶分子印迹整体柱,用高效液相色谱法研究了聚合参数与印迹整体柱亲和性的关系。实验中选用三羟甲基丙烷三甲基丙烯酸酯(TRIM)为交联剂,以甲苯和十二醇为致孔剂合成整体柱骨架,并在此基础上以(S)-萘普生为模板,加入液晶单体4-氰基苯基单环己基乙烯(CPCE)进行二次聚合接枝。实验中系统考察了流动相中乙腈比例及缓冲液pH值对色谱保留的影响,结果发现液晶单体的加入使得MIPs对萘普生保留控制机制由原来的氢键作用变为了疏水作用;通过动态吸附实验得到的突破曲线经前沿分析及对吸附等温线Langmuir、Freundlich和Scatchard分析拟合,发现交联度为15%时液晶MIPs印迹因子最大(3.78)、非均一性最强,且特异性吸附量高于非特异性吸附量。液晶MIPs的计量置换模型(SDM-R)分析表明,液晶印迹整体柱对模板分子的总亲和力(ln A=0.645)明显高于其类似物;而从空间匹配程度看,与液晶印迹整体柱空间匹配程度最高的是酮洛芬而非模板分子,但液晶印迹整体柱对酮洛芬的总亲和力(ln A=0.242)不及模板分子的一半,表明在本低交联液晶印迹系统中,空间效应不是决定印迹系统识别能力的主要因素。进一步的分离热力学研究发现,低交联液晶印迹柱的|ΔΔH|<T|ΔΔS|,而交联度为70%的非液晶MIPs柱的|ΔΔH|>T|ΔΔS|,表明液晶MIPs的分离过程是一个熵控制过程,而常规无液晶MIPs的分离过程是一个焓控制过程。上述结果表明,液晶单体的加入改变了MIPs的识别机制,适当的低交联度可显著提高液晶MIPs的识别性能,因此液晶MIPs这些特质有望使其成为新一代的MIPs。
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Affiliation(s)
- Qin Wei
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Xiuxiu Chen
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Lihong Bai
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Liang Zhao
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Yanping Huang
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
| | - Zhaosheng Liu
- Tianjin Key Laboratory of Technologies Enabling Development of Clinical Therapeutics and Diagnostics (Theranostics), School of Pharmacy, Tianjin Medical University, Tianjin 300070, China
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Yeszhanov AB, Korolkov IV, Dosmagambetova SS, Zdorovets MV, Güven O. Recent Progress in the Membrane Distillation and Impact of Track-Etched Membranes. Polymers (Basel) 2021; 13:2520. [PMID: 34372131 DOI: 10.3390/polym13152520] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/25/2021] [Accepted: 07/26/2021] [Indexed: 11/19/2022] Open
Abstract
Membrane distillation (MD) is a rapidly developing field of research and finds applications in desalination of water, purification from nonvolatile substances, and concentration of various solutions. This review presents data from recent studies on the MD process, MD configuration, the type of membranes and membrane hydrophobization. Particular importance has been placed on the methods of hydrophobization and the use of track-etched membranes (TeMs) in the MD process. Hydrophobic TeMs based on poly(ethylene terephthalate) (PET), poly(vinylidene fluoride) (PVDF) and polycarbonate (PC) have been applied in the purification of water from salts and pesticides, as well as in the concentration of low-level liquid radioactive waste (LLLRW). Such membranes are characterized by a narrow pore size distribution, precise values of the number of pores per unit area and narrow thickness. These properties of membranes allow them to be used for more accurate water purification and as model membranes used to test theoretical models (for instance LEP prediction).
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11
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Durairaju P, Umarani C, Rajabather JR, Alanazi AM, Periyasami G, Wilson LD. Synthesis and Characterization of Pyridine-Grafted Copolymers of Acrylic Acid-Styrene Derivatives for Antimicrobial and Fluorescence Applications. Micromachines (Basel) 2021; 12:672. [PMID: 34201351 PMCID: PMC8230187 DOI: 10.3390/mi12060672] [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] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 11/16/2022]
Abstract
The goal of the present study was to copolymerize 3-(4-acetylphenylcarbamoyl) acrylic acid and styrene using azo-bis-isobutyronitrile (AIBN) as a catalyst. The resulting copolymers exhibited number average molecular weights (Mn) of 3.73-5.23 × 104 g/mol with a variable polydispersity (PDI = 2.3-3.8). The amide group of the PMA/PSA polymer was used for grafting poly (-styrene-maleic acid substituted aromatic 2-aminopyridine) by the Hantzsch reaction using a substituted aromatic aldehyde, malononitrile, and ammonium acetate. The polymer can emit strong blue fluorescence (λ = 510 nm) and its thermal stability and solubility were enhanced by polymer grafting. Moreover, the polymer showed the fluorescence spectra of the copolymer had a strong, broad emission band between 300 to 550 nm (maximum wavelength 538 nm) under excitation at 293 nm. The Hantzsch reaction yields an interesting class of nitrogen-based heterocycles that combine with a synthetic strategy for synthesis of grafted co-polymer pyridine-styrene derivatives. The as-prepared pyridine-based polymer compounds were screened against Gram-positive and Gram-negative bacteria, where a maximum inhibition zone toward all four types of bacteria was observed, including specific antifungal activity. Herein, a series of pyridine compounds were synthesized that showed enhanced fluorescent properties and antimicrobial properties due to their unique structure and ability to form polymer assemblies.
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Affiliation(s)
- Periyan Durairaju
- Department of Chemistry, Thiruvalluvar Government Arts College, Rasipuram 636007, Tamilnadu, India
- Department of Chemistry, Government Arts College (Autonomous), Salem 636007, Tamilnadu, India;
| | - Chinnasamy Umarani
- Department of Chemistry, Government Arts College (Autonomous), Salem 636007, Tamilnadu, India;
| | - Jothi Ramalingam Rajabather
- Chemistry Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia; (J.R.R.); (G.P.)
| | - Amer M. Alanazi
- Pharmaceutical Chemistry Department, College of Pharmacy, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Govindasami Periyasami
- Chemistry Department, College of Sciences, King Saud University, Riyadh 11451, Saudi Arabia; (J.R.R.); (G.P.)
| | - Lee D. Wilson
- Department of Chemistry, University of Saskatchewan, 110 Science Place—Room 165 Thorvaldson Bldg., Saskatoon, SK S7N 5C9, Canada
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12
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Hoshina H, Chen J, Amada H, Seko N. Chelating Fabrics Prepared by an Organic Solvent-Free Process for Boron Removal from Water. Polymers (Basel) 2021; 13:polym13071163. [PMID: 33916430 PMCID: PMC8038601 DOI: 10.3390/polym13071163] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 03/29/2021] [Revised: 04/02/2021] [Accepted: 04/03/2021] [Indexed: 11/17/2022] Open
Abstract
A chelating fabric was prepared by graft polymerization of glycidyl methacrylate (GMA) onto a nonwoven fabric, followed by attachment reaction of N-methyl-D-glucamine (NMDG) using an organic solvent-free process. The graft polymerization was performed by immersing the gamma-ray pre-irradiated fabric into the GMA emulsion, while the attachment reaction was carried out by immersing the grafted fabric in the NMDG aqueous solution. The chelating capacity of the chelating fabric prepared by reaction in the NMDG aqueous solution without any additives reached 1.74 mmol/g, which further increased to above 2.0 mmol/g when surfactant and acid catalyst were added in the solution. The boron chelation of the chelating fabric was evaluated in a batch mode. Fourier transform infrared spectrophotometer (FTIR) was used to characterize the fabrics. The chelating fabric can quickly chelate boron from water to form a boron ester, and a high boron chelating ability close to 18.3 mg/g was achieved in the concentrated boron solution. The chelated boron can be eluted completely by HCl solution. The regeneration and stability of the chelating fabric were tested by 10 cycles of the chelation-elution operations. Considering the organic solvent-free preparation process and the high boron chelating performance, the chelating fabric is promising for the boron removal from water.
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13
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Badiei YM, Traba C, Rosales R, Rojas AL, Amaya C, Shahid M, Vera-Rolong C, Concepcion JJ. Plasma-Initiated Graft Polymerization of Acrylic Acid onto Fluorine-Doped Tin Oxide as a Platform for Immobilization of Water-Oxidation Catalysts. ACS Appl Mater Interfaces 2021; 13:14077-14090. [PMID: 33751889 DOI: 10.1021/acsami.0c19730] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The discovery of new and versatile strategies for the immobilization of molecular water-oxidation catalysts (WOCs) is crucial for developing clean energy conversion devices [e.g., (photo)electrocatalytic cells for water splitting]. The traditional approach for surface attachment to transparent conductive oxides [e.g., fluorine doped tin oxide (FTO)] is via synthetic modification of the ligand architecture to incorporate functional groups such as carboxylic acids (-COOH) or phosphonates (-PO3H2) prior to immobilization. However, challenges arising from desorption and the cumbersome derivatizations steps have limited the scope and applications of surface-bound WOCs. Herein, we report the successful immobilization of underivatized Ru(II)-based WOCs (Ru-Cat1 = [Ru(tpy) (bpy) (H2O)]2+ (tpy = 2,2':6'2″-terpyridine and bpy = 2,2'-bipyridine) and Ru-Cat2 = [Ru(Mebimpy) (bpy) (H2O)]2+ (Mebimpy = 2,6-bis(1-methylbenzimidazol-2-yl) pyridine)) and the Ru(II) polypyridyl chromophore Ru-C3 = [Ru(bpy)3]2+ onto a FTO plasma-grafted poly(acrylic acid) surface (PAA|FTO). Various characterization techniques such as attenuated total reflectance Fourier transform infrared spectroscopy, scanning electron microscopy, atomic force microscopy, and cyclic voltammetry measurements provide evidence for the plasma-induced grafted PAA|FTO film and immobilization. Surface stability and electrocatalytic properties of these new hybrid composite films upon cycling were investigated at different pH values. Immobilized Ru-Cat1 and Ru-Cat2 onto PAA|FTO displayed pH-dependent (RuIII/RuII) couples and onset potentials indicative of PCET (proton-coupled electron transfer) reactions. Based on cyclic voltammetry results and spectroscopic monitoring, the immobilized WOCs Ru-Cat1 and Ru-Cat2 exhibited a higher surface stability in neutral aqueous solutions relative to Ru-C3 upon electrochemical oxidation. We attribute the surface PCET and stability to the presence of a water ligand in the coordination sphere of immobilized Ru-Cat1 and Ru-Cat2 which can H-bond with negatively charged carboxylate groups of the cross-linked PAA brushes. Our findings demonstrate that the plasma-grafted polymeric network onto FTO offers a versatile platform to directly anchor unmodified homogeneous WOCs or chromophores for potential applications in solar-to-fuel energy conversion.
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Affiliation(s)
- Yosra M Badiei
- Department of Chemistry, Saint Peter's University, Jersey City, New Jersey 07306, United States
| | - Christian Traba
- Department of Chemistry, Biochemistry, and Physics, Fairleigh Dickinson University, Teaneck, New Jersey 07666, United States
| | - Rina Rosales
- Department of Chemistry, Saint Peter's University, Jersey City, New Jersey 07306, United States
| | - Anthony Lopez Rojas
- Department of Chemistry, Saint Peter's University, Jersey City, New Jersey 07306, United States
| | - Claudio Amaya
- Department of Chemistry, Saint Peter's University, Jersey City, New Jersey 07306, United States
| | - Mohammed Shahid
- Department of Chemistry, Saint Peter's University, Jersey City, New Jersey 07306, United States
| | - Carolina Vera-Rolong
- Department of Chemistry, Saint Peter's University, Jersey City, New Jersey 07306, United States
| | - Javier J Concepcion
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
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14
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Racovita S, Baranov N, Macsim AM, Lionte C, Cheptea C, Sunel V, Popa M, Vasiliu S, Desbrieres J. New Grafted Copolymers Carrying Betaine Units Based on Gellan and N-Vinylimidazole as Precursors for Design of Drug Delivery Systems. Molecules 2020; 25:E5451. [PMID: 33233752 PMCID: PMC7699957 DOI: 10.3390/molecules25225451] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/14/2020] [Accepted: 11/20/2020] [Indexed: 01/02/2023] Open
Abstract
New grafted copolymers possessing structural units of 1-vinyl-3-(1-carboxymethyl) imidazolium betaine were obtained by graft copolymerization of N-vinylimidazole onto gellan gum followed by the polymer-analogous reactions on grafted polymer with the highest grafting percentage using sodium chloroacetate as the betainization agent. The grafted copolymers were prepared using ammonium persulfate/N,N,N',N' tetramethylethylenediamine in a nitrogen atmosphere. The grafting reaction conditions were optimized by changing one of the following reaction parameters: initiator concentration, monomer concentration, polymer concentration, reaction time or temperature, while the other parameters remained constant. The highest grafting yield was obtained under the following reaction conditions: ci = 0.08 mol/L, cm = 0.8 mol/L, cp = 8 g/L, tr = 4 h and T = 50 °C. The kinetics of the graft copolymerization of N-vinylimidazole onto gellan was discussed and a suitable reaction mechanism was proposed. The evidence of the grafting reaction was confirmed through FTIR spectroscopy, X-ray diffraction, 1H-NMR spectroscopy and scanning electron microscopy. The grafted copolymer with betaine structure was obtained by a nucleophilic substitution reaction where the betainization agent was sodium chloroacetate. Preliminary results prove the ability of the grafted copolymers to bind amphoteric drugs (cefotaxime) and, therefore, the possibility of developing the new sustained drug release systems.
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Affiliation(s)
- Stefania Racovita
- “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, No. 41A, 700487 Iasi, Romania; (S.R.); (A.M.M.); (S.V.)
| | - Nicolae Baranov
- Department of Natural and Synthetic Polymers, Faculty of Chemical Engienering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, Prof. Dr. Docent Dimitrie Mangeron Street, No. 73, 700050 Iasi, Romania; (N.B.); (M.P.)
- Faculty of Chemistry, “Al. I. Cuza” University, Carol 1 Bvd., No. 11, 700506 Iasi, Romania;
| | - Ana Maria Macsim
- “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, No. 41A, 700487 Iasi, Romania; (S.R.); (A.M.M.); (S.V.)
| | - Catalina Lionte
- Faculty of Medicine, “Gr. T. Popa” University of Medicine and Pharmacy, Universitatii Street, No.16, 700115 Iasi, Romania;
| | - Corina Cheptea
- Department of Biomedical Sciences, Faculty of Biomedical Bioengineering, “Gr. T. Popa” University of Medicine and Pharmacy, Kogalniceanu Street No. 9-13, 700454 Iasi, Romania;
| | - Valeriu Sunel
- Faculty of Chemistry, “Al. I. Cuza” University, Carol 1 Bvd., No. 11, 700506 Iasi, Romania;
| | - Marcel Popa
- Department of Natural and Synthetic Polymers, Faculty of Chemical Engienering and Environmental Protection, “Gheorghe Asachi” Technical University of Iasi, Prof. Dr. Docent Dimitrie Mangeron Street, No. 73, 700050 Iasi, Romania; (N.B.); (M.P.)
- Academy of Romanian Scientists, Splaiul Independentei Street No. 54, 050085 Bucuresti, Romania
| | - Silvia Vasiliu
- “Petru Poni” Institute of Macromolecular Chemistry, Grigore Ghica Voda Alley, No. 41A, 700487 Iasi, Romania; (S.R.); (A.M.M.); (S.V.)
| | - Jacques Desbrieres
- Institut des Sciences Analytiques et de Physico-Chimie Pour l’Environnement et les Materiaux (IPREM), Pau and Pays de l’Adour University (UPPA), UMR CNRS 5254, Helioparc Pau Pyrenees, 2, av. President Angot, 64053 Pau CEDEX 09, France
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15
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Zhu J, Song X, Tan WK, Wen Y, Gao Z, Ong CN, Loh CS, Swarup S, Li J. Chemical Modification of Biomass Okara Using Poly(acrylic acid) through Free Radical Graft Polymerization. J Agric Food Chem 2020; 68:13241-13246. [PMID: 32364750 DOI: 10.1021/acs.jafc.0c01818] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Okara (Ok) or soybean residue is produced as a byproduct from the soybean milk and soybean curd industries world wide, most of which is disposed or burned as waste. It is important to explore the possibilities to convert okara to useful materials, because okara is a naturally renewable bioresource. Here, we report the chemical modification of okara by grafting poly(acrylic acid) (PAA) onto the backbones of okara in water medium and the characterization of the Ok-PAA graft copolymers. It was found that the received okara mainly contained insoluble contents in water. The insoluble okara component Ok(Ins) was suspended in water and activated with ammonium persulfate as an initiator, followed by grafting PAA through a free radical polymerization. After the graft polymerization, the product (Ok-PAA) was separated into precipitate and supernatant, which were dried to give Ok-PAA(pre) and Ok-PAA(sup), respectively. It was found that PAA was grafted on Ok backbones and co-precipitated with the insoluble Ok. In addition, Ok-PAA(sup) was found to be translucent as a result of the grafting of PAA. Further, the successful grafting of PAA onto okara backbones was proven by Fourier transform infrared, thermogravimetric analysis, and microscopic measurements. Ok-PAA(sup) dispersed in water formed nanoparticles with an average diameter of 420 nm, while Ok-PAA(pre) was clustered coarse particles in water. The rheological data including the storage modulus, loss modulus, and viscosity indicated that the Ok-PAA product was a viscoelastic gel-like material with potential for agricultural and environmental applications.
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Affiliation(s)
- Jingling Zhu
- NUS Environmental Research Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore
| | - Xia Song
- NUS Environmental Research Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore
| | - Wee Kee Tan
- NUS Environmental Research Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Yuting Wen
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore
| | - Zhengyang Gao
- NUS Environmental Research Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Choon Nam Ong
- NUS Environmental Research Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore
- Saw Swee Hock School of Public Health, National University of Singapore, 12 Science Drive 2, Singapore 117549, Singapore
| | - Chiang Shiong Loh
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543, Singapore
| | - Sanjay Swarup
- NUS Environmental Research Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543, Singapore
| | - Jun Li
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, 7 Engineering Drive 1, Singapore 117574, Singapore
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Hoshina H, Chen J, Amada H, Seko N. Chain Entanglement of 2-Ethylhexyl Hydrogen-2-Ethylhexylphosphonate into Methacrylate-Grafted Nonwoven Fabrics for Applications in Separation and Recovery of Dy (III) and Nd (III) from Aqueous Solution. Polymers (Basel) 2020; 12:E2656. [PMID: 33187185 PMCID: PMC7697889 DOI: 10.3390/polym12112656] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/09/2020] [Accepted: 11/09/2020] [Indexed: 02/01/2023] Open
Abstract
A nonwoven fabric adsorbent loaded with 2-ethylhexyl hydrogen-2-ethylhexylphosphonate (EHEP) was developed for the separation and recovery of dysprosium (Dy) and neodymium (Nd) from an aqueous solution. The adsorbent was prepared by the radiation-induced graft polymerization of a methacrylate monomer with a long alkyl chain onto a nonwoven fabric and the subsequent loading of EHEP by hydrophobic interaction and chain entanglement between the alkyl chains. The adsorbent was evaluated by batch and column tests with a Dy (III) and Nd (III) aqueous solution. In the batch tests, the adsorbent showed high Dy (III) adsorptivity close to 25.0 mg/g but low Nd (III) adsorptivity below 1.0 mg/g, indicating that the adsorbent had high selective adsorption. In particular, the octadecyl methacrylate (OMA)-adsorbent showed adsorption stability in repeated tests. In the column tests, the OMA-adsorbent was also stable and showed high Dy (III) adsorptivity and high selectivity in repeated adsorption-elution circle tests. This result suggested that the OMA-adsorbent may be a promising adsorbent for the separation and recovery of Dy (III) and Nd (III) ions.
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Affiliation(s)
- Hiroyuki Hoshina
- Department of Advanced Functional Materials Research, Takasaki Advanced Radiation Research Institute, Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki-machi, Takasaki, Gunma 370-1292, Japan; (H.A.); (N.S.)
| | - Jinhua Chen
- Department of Advanced Functional Materials Research, Takasaki Advanced Radiation Research Institute, Quantum Beam Science Research Directorate, National Institutes for Quantum and Radiological Science and Technology, 1233 Watanuki-machi, Takasaki, Gunma 370-1292, Japan; (H.A.); (N.S.)
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Huang C, Xu X, Ao J, Ma L, Ye F, Wang Z, Xu L, Zhao X, Ma H. Selective Adsorption, Reduction, and Separation of Au(III) from Aqueous Solution with Amine-Type Non-Woven Fabric Adsorbents. Materials (Basel) 2020; 13:ma13132958. [PMID: 32630807 PMCID: PMC7372446 DOI: 10.3390/ma13132958] [Citation(s) in RCA: 4] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 06/06/2020] [Accepted: 06/17/2020] [Indexed: 11/17/2022]
Abstract
Herein, adsorption, separation, and reduction of Au(III) from its aqueous solution were studied with different amine-type, non-woven fabric (NF) adsorbents fabricated with radiation-induced graft polymerization. The adsorbents exhibited different adsorption capacities of Au(III) over a concentration range of hydrochloric acid (HCl) from 5 mM to 5 M, and the diethylamine (DEA)-type adsorbent performed best under all test conditions. The DEA-type adsorbent was inert toward other metal ions, including Cu(II), Pb(II), Ni(II), Zn(II) and Li(I), within the fixed concentration range of HCl. Flow-through adsorption tests indicated DEA-type adsorbent exhibited a rapid recovery and high adsorption capacity of 3.23 mmol/g. Meanwhile, DEA-type adsorbent also exhibited high selectivity and rapid extraction for Au(III) from its mixed solution with Pt(IV) and Pd(II). After adsorption, the reduction of Au(III) was confirmed by XRD spectra, TEM, and digital micrograph images. The results indicated that nano-sized Au particles were mainly concentrated on the adsorbent in 5 mM HCl solution. In 1 M HCl solution, not only nano-sized Au particles were found, but also micro-size Au plates precipitation occurred. This study provides a novel material for selective and efficient gold uptake from aqueous solution.
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Affiliation(s)
- Chen Huang
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China;
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (X.X.); (J.A.); (L.M.); (F.Y.); (Z.W.); (L.X.)
| | - Xiao Xu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (X.X.); (J.A.); (L.M.); (F.Y.); (Z.W.); (L.X.)
| | - Junxuan Ao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (X.X.); (J.A.); (L.M.); (F.Y.); (Z.W.); (L.X.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lin Ma
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (X.X.); (J.A.); (L.M.); (F.Y.); (Z.W.); (L.X.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Feng Ye
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (X.X.); (J.A.); (L.M.); (F.Y.); (Z.W.); (L.X.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ziqiang Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (X.X.); (J.A.); (L.M.); (F.Y.); (Z.W.); (L.X.)
| | - Lu Xu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (X.X.); (J.A.); (L.M.); (F.Y.); (Z.W.); (L.X.)
| | - Xiaoyan Zhao
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China;
- Correspondence: (X.Z.); (H.M.); Tel.: +86-1891-589-6792 (X.Z.); +86-1361-176-4034 (H.M.)
| | - Hongjuan Ma
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China; (X.X.); (J.A.); (L.M.); (F.Y.); (Z.W.); (L.X.)
- Correspondence: (X.Z.); (H.M.); Tel.: +86-1891-589-6792 (X.Z.); +86-1361-176-4034 (H.M.)
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Kovačević S, Schwarz I, Đorđević S, Đorđević D. Synthesis of Corn Starch Derivatives and Their Application in Yarn Sizing. Polymers (Basel) 2020; 12:E1251. [PMID: 32486138 DOI: 10.3390/polym12061251] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 05/28/2020] [Accepted: 05/28/2020] [Indexed: 11/17/2022] Open
Abstract
The use of synthesized natural starches for the sizing process in fabric production is primarily an environmental contribution. Synthesized corn starch is environmentally friendly and productive, showing good results in cotton yarn sizing. Acrylamide (AA) and 2-hydroxyethyl methacrylate (HEMA) were applied for the grafting process of corn starch, and the initiators azobisisobutyronitrile (AIBN), potassium persulfate (KPS), and benzoyl peroxide (BP) were chosen to form the grafted monomers more effectively. The application of synthesized corn starch has been confirmed, especially with the AIBIN initiator in the grafting process of HEMA onto starch. The FTIR analysis confirmed that new and efficient products for sizing cotton yarns based on natural raw material (corn) were developed. The research showed that the synthesized corn starch improved physical-mechanical yarn properties and abrasion resistance and reduced yarn surface hairiness. Ultrasonic desizing of yarn and the use of a lower size concentration led to better results than desizing by washing, and the Tegewa numbers confirmed that the desizing process was successful.
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Hu H, Wang L, Xu B, Wang P, Yuan J, Yu Y, Wang Q. Construction of a composite hydrogel of silk sericin via horseradish peroxidase-catalyzed graft polymerization of poly-PEGDMA. J Biomed Mater Res B Appl Biomater 2020; 108:2643-2655. [PMID: 32144891 DOI: 10.1002/jbm.b.34596] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Revised: 01/13/2020] [Accepted: 02/22/2020] [Indexed: 02/01/2023]
Abstract
Silk sericin (SS), which is one of the main components of Bombyx mori silk fibers, has attracted increasing attentions as functional biomaterials due to its diverse biological activities as well as excellent biocompatibility. However, the poor formability and weak mechanical properties of SS materials severely limit their practical applications in biomedical field. To address this issue, in this study poly(ethylene glycol)dimethacrylate (PEGDMA) modified sericin were prepared by graft polymerization of poly-PEGDMA (pPEGDMA) onto sericin chains in the presence of horseradish peroxidase and hydrogen peroxide under mild condition. The composite hydrogels obtained from the modified SS not only exhibit much improved formability and excellent mechanical properties, but also high possess porosity and swelling ratios up to 63 and 1,250%, respectively, at the optimized formulation. Moreover, the composite hydrogels also reveal sustained drug release behavior and acceptable cytotoxicity, which endow them with vast application as biomaterials. It is envisioned that the method presented in this study would expand the application of SS in biomedical filed.
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Affiliation(s)
- Haoran Hu
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi, People's Republic of China
| | - Lin Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi, People's Republic of China
| | - Bo Xu
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi, People's Republic of China
| | - Ping Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi, People's Republic of China
| | - Jiugang Yuan
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi, People's Republic of China
| | - Yuanyuan Yu
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi, People's Republic of China
| | - Qiang Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi, People's Republic of China
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Wang Y, Qi Y, Chen C, Zhao C, Ma Y, Yang W. Layered Co-Immobilization of β-Glucosidase and Cellulase on Polymer Film by Visible-Light-Induced Graft Polymerization. ACS Appl Mater Interfaces 2019; 11:44913-44921. [PMID: 31670943 DOI: 10.1021/acsami.9b16274] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Exploring a suitable immobilization strategy to improve catalytic efficiency and reusability of cellulase is of great importance to lowering the cost and promoting the industrialization of cellulose-derived bioethanol. In this work, a layered structure with a thin PEG hydrogel as the inner layer and sodium polyacrylate (PAANa) brush as the outer layer was fabricated on low density polyethylene (LDPE) film by visible-light-induced graft polymerization. Two enzymes, β-glucosidase (BG) and cellulase, were separately coimmobilized onto this hierarchical film. As supplementary to cellulase for improving catalytic efficiency, BG was in situ entrapped into the inner PEG hydrogel layer during the graft polymerization from the LDPE surface. After graft polymerization of sodium acrylate on the PEG hydrogel layer was reinitiated, cellulase was covalently attached on the outer PAANa brush layer. Owing to the mild reaction condition (visible-light irradiation and room temperature), the immobilized BG could retain a high activity after the graft polymerization. The immobilization did not alter the optimal pH and temperature of BG or the optimal temperature of cellulase. However, the optimal pH of cellulase shifts to 5.0 after immobilization. Compared with the original activity of single cellulase system and isolated BG/cellulase immobilization system, the dual-enzyme system exhibited 82% and 20% increase in catalytic activity, respectively. The dual-enzyme system could maintain 93% of carboxymethylcellulose sodium salt (CMC) activity after repeating 10 cycles of hydrolysis and 89% of filter paper activity after 6 cycles relative to original activity, exhibiting excellent reusability. This layer coimmobilization system of BG and cellulase on the polymer film displays tremendous potential for practical application in a biorefinery.
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Zdorovets MV, Korolkov IV, Yeszhanov AB, Gorin YG. Functionalization of PET Track-Etched Membranes by UV-Induced Graft (co)Polymerization for Detection of Heavy Metal Ions in Water. Polymers (Basel) 2019; 11:polym11111876. [PMID: 31766259 PMCID: PMC6918391 DOI: 10.3390/polym11111876] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 10/14/2019] [Revised: 11/06/2019] [Accepted: 11/11/2019] [Indexed: 12/14/2022] Open
Abstract
Nowadays, water quality monitoring is an essential task since environmental contamination and human exposure to heavy metals increased. Sensors that are able to detect ever lower concentrations of heavy metal ions with greater accuracy and speed are needed to effectively monitor water quality and prevent poisoning. This article shows studies of the modification of flexible track-etched membranes as the basis for the sensor with various polymers and their influence on the accuracy of detection of copper, cadmium, and lead ions in water. We report the UV-induced graft (co)polymerization of acrylic acid (AA) and 4-vinylpyridine (4-VPy) on poly(ethylene terephthalate) track-etched membrane (PET TeMs) and use them after platinum layer sputtering in square wave anodic stripping voltammetry (SW-ASV) for detection of Cu2+, Cd2+, and Pb2+. Optimal conditions leading to functionalization of the surface and retention of the pore structure were found. Modified membranes were characterized by SEM, FTIR, X-ray photoelectron spectroscopy (XPS) and colorimetric analysis. The dependence of the modification method on the sensitivity of the sensor was shown. Membrane modified with polyacrylic acid (PET TeMs-g-PAA), poly(4-vinylpyridine) (PET TeMs-g-P4VPy), and their copolymer (PET TeMs-g-P4VPy/PAA) with average grafting yield of 3% have been found to be sensitive to µg/L concentration of copper, lead, and cadmium ions. Limits of detection (LOD) for sensors based on PET TeMs-g-PAA are 2.22, 1.05, and 2.53 µg/L for Cu2+, Pb2+, and Cd2+, respectively. LODs for sensors based on PET TeMs-g-P4VPy are 5.23 µg/L (Cu2+), 1.78 µg/L (Pb2+), and 3.64 µg/L (Cd2+) µg/L. PET TeMs-g-P4VPy/PAA electrodes are found to be sensitive with LODs of 0.74 µg/L(Cu2+), 1.13 µg/L (Pb2+), and 2.07 µg/L(Cd2+). Thus, it was shown that the modification of membranes by copolymers with carboxylic and amino groups leads to more accurate detection of heavy metal ions, associated with the formation of more stable complexes.
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Affiliation(s)
- Maxim V. Zdorovets
- L.N.Gumilyov Eurasian National University, Satpaev str., 5, Nur-Sultan 010008, Kazakhstan; (A.B.Y.); (Y.G.G.)
- The Institute of Nuclear Physics, Ibragimov str., 1, Almaty 050032, Kazakhstan
- Ural Federal University, Mira str. 19, Ekaterinburg 620002, Russia
- Correspondence: (M.V.Z.); (I.V.K.)
| | - Ilya V. Korolkov
- L.N.Gumilyov Eurasian National University, Satpaev str., 5, Nur-Sultan 010008, Kazakhstan; (A.B.Y.); (Y.G.G.)
- The Institute of Nuclear Physics, Ibragimov str., 1, Almaty 050032, Kazakhstan
- Correspondence: (M.V.Z.); (I.V.K.)
| | - Arman B. Yeszhanov
- L.N.Gumilyov Eurasian National University, Satpaev str., 5, Nur-Sultan 010008, Kazakhstan; (A.B.Y.); (Y.G.G.)
- The Institute of Nuclear Physics, Ibragimov str., 1, Almaty 050032, Kazakhstan
| | - Yevgeniy G. Gorin
- L.N.Gumilyov Eurasian National University, Satpaev str., 5, Nur-Sultan 010008, Kazakhstan; (A.B.Y.); (Y.G.G.)
- The Institute of Nuclear Physics, Ibragimov str., 1, Almaty 050032, Kazakhstan
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Montoya-Villegas KA, Ramírez-Jiménez A, Licea-Claverie Á, Pérez-Sicairos S, Bucio E, Bernáldez-Sarabia J, Licea-Navarro AF. Surface Modification of Polyester-Fabric with Hydrogels and Silver Nanoparticles: Photochemical Versus Gamma Irradiation Methods. Materials (Basel) 2019; 12:ma12203284. [PMID: 31658585 PMCID: PMC6829902 DOI: 10.3390/ma12203284] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [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: 06/28/2019] [Revised: 07/25/2019] [Accepted: 07/26/2019] [Indexed: 11/16/2022]
Abstract
A Gamma irradiation and photochemical crosslinking/grafting of poly(2-hydroxyethyl methacrylate) (PHEMA) and poly(2-hydroxyethyl methacrylate-co-poly(ethylene glycol) methacrylate) (poly(HEMA-co-PEGMA)) hydrogels onto polyethyleneterephtalate fabric (PET) surfaces were evaluated, in order to obtain a hydrophilic homogeneous coating onto PET fabrics. The materials were characterized by FTIR-ATR, SEM, EDS, and thermal analysis. Furthermore, silver nanoparticles (AgNPs) were loaded by in situ reduction of AgNO3, and its antibacterial activity against Staphylococcus aureus and Escherichia coli was determined. Results showed a ticker coating of hydrogel using gamma radiation and stronger in deep modification of the fibers; however, by the photochemical method, a thin coating with good coverage of PET surface was obtained. The differences in hydrophilicity, thermal properties, and antibacterial activity of the coated fabrics by using both methods were rather small.
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Affiliation(s)
- Kathleen A Montoya-Villegas
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/Instituto Tecnológico de Tijuana, Tijuana 22000, Mexico.
| | - Alejandro Ramírez-Jiménez
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/Instituto Tecnológico de Tijuana, Tijuana 22000, Mexico.
- CONACyT-Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/Instituto Tecnológico de Tijuana, Tijuana 22000, Mexico.
| | - Ángel Licea-Claverie
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/Instituto Tecnológico de Tijuana, Tijuana 22000, Mexico.
| | - Sergio Pérez-Sicairos
- Centro de Graduados e Investigación en Química, Tecnológico Nacional de México/Instituto Tecnológico de Tijuana, Tijuana 22000, Mexico.
| | - Emilio Bucio
- Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Circuito Exterior, Ciudad Universitaria, Ciudad de Mexico 04510, Mexico.
| | - Johanna Bernáldez-Sarabia
- Departamento de Innovación Biomédica, Centro de Investigación Científica y Educación Superior de Ensenada, Ensenada 22860, Mexico.
| | - Alexei F Licea-Navarro
- Departamento de Innovación Biomédica, Centro de Investigación Científica y Educación Superior de Ensenada, Ensenada 22860, Mexico.
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Wu W, Niu H, Yang D, Wang S, Jiang N, Wang J, Lin J, Hu C. Polyaniline/Carbon Nanotubes Composite Modified Anode via Graft Polymerization and Self-Assembling for Microbial Fuel Cells. Polymers (Basel) 2018; 10:E759. [PMID: 30960684 DOI: 10.3390/polym10070759] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 06/30/2018] [Accepted: 07/03/2018] [Indexed: 02/07/2023] Open
Abstract
Microbial fuel cells (MFCs) are promising devices for sustainable energy production, wastewater treatment and biosensors. Anode materials directly interact with electricigens and accept electrons between cells, playing an important role in determining the performance of MFCs. In this study, a novel carbon nanotubes (CNTs) and polyaniline (PANI) nanocomposite film modified Indium-tin oxide (ITO) anode was fabricated through graft polymerization of PANI after the modification of γ-aminopropyltriethoxysilane (APTES) on ITO substrate, which was followed by layer-by-layer (LBL) self-assembling of CNTs and PANI alternatively on its surface. (CNTs/PANI)n/APTES/ITO electrode with low charge transfer resistance showed better electrochemical behavior compared to the bare ITO electrode. Twelve layers of CNTs/PANI decorated ITO electrode with an optimal nanoporous network exhibited superior biocatalytic properties with a maximal current density of 6.98 µA/cm², which is 26-fold higher than that of conventional ITO electrode in Shewanella loihica PV-4 bioelectrochemical system. MFCs with (CNTs/PANI)12/APTES/ITO as the anode harvested a maximum output power density of 34.51 mW/m², which is 7.5-fold higher than that of the unmodified ITO electrode. These results demonstrate that (CNTs/PANI)12/APTES/ITO electrode has superior electrochemical and electrocatalytic properties compared to the bare ITO electrode, while the cellular toxicity of CNTs has an effect on the performance of MFC with (CNTs/PANI)n/APTES/ITO electrode.
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He B, Zhu X, Zhao C, Wang G, Ma Y, Yang W. Cytocompatible Fabrication of Yeast Cells/Fabrics Composite Sheet for Bioethanol Production. Macromol Rapid Commun 2018; 39:e1800212. [PMID: 29947153 DOI: 10.1002/marc.201800212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 03/13/2018] [Revised: 05/06/2018] [Indexed: 11/10/2022]
Abstract
Entrapment of living cells into a polymer network has significant potential in various fields such as biomass conversion and tissue engineering. A crucial challenge for this strategy is to provide a mild enough condition to preserve cell viability. Here, a facile and cytocompatible method to entrap living yeast cells into a poly(ethylene glycol) (PEG) network grafting from polypropylene nonwoven fabrics via visible-light-induced surface living graft crosslinking polymerization is reported. Due to the mild reaction conditions and excellent biocompatibility of PEG, the immobilized yeast cells could maintain their viability and proliferate well. The obtained composite sheet has excellent long-term stability and shows no significant efficiency loss after 25 cycles of repeated batch bioethanol fermentation. The immobilized yeast cells exhibit 18.0% higher bioethanol fermentation efficiency than free cells. This strategy for immobilization of living cells with high viability has significant potential application.
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Affiliation(s)
- Bin He
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Xing Zhu
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Changwen Zhao
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Guan Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Yuhong Ma
- Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Wantai Yang
- State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing, 100029, China.,Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing, 100029, China.,Beijing Advanced Innovation Centre for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
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25
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Valdés O, Marican A, Mirabal-Gallardo Y, Santos LS. Selective and Efficient Arsenic Recovery from Water through Quaternary Amino-Functionalized Silica. Polymers (Basel) 2018; 10:polym10060626. [PMID: 30966660 PMCID: PMC6404077 DOI: 10.3390/polym10060626] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 05/09/2018] [Revised: 05/25/2018] [Accepted: 05/30/2018] [Indexed: 11/16/2022] Open
Abstract
The free-radical graft polymerization of acryloxyethyl-trimethylammonium chloride onto commercial silica particles was studied experimentally for extraction of arsenic ions from water. Two steps were used to graft acryloxyethyl-trimethylammonium chloride (Q) onto the surface of nanosilica: anchoring vinyltrimethoxysilane (VTMSO) onto the surface of silica to modify it with double bonds and then grafting Q onto the surface of silica with potassium persulfate as an initiator. The products were characterized by Fourier-transform infrared (FT-IR), the thermogravimetric analysis (TGA), scanning electron microscopy (SEM), 13C, 29Si nuclear magnetic resonance (NMR), and X-ray powder diffraction (XRD). The results showed that it is easy to graft Q onto the surface of silica under radical polimerization. The morphology analysis of silica and modified silica indicated that the silica decreased the size scale after modification. Q/VTMSO-SiO₂ was tested for its ability to remove arsenic from drinking water. The results show that the new silica hybrid particles efficiently remove all arsenate ions. In addition, Q/VTMSO-SiO₂ showed better sorption capacities for other metal ions (such as copper, zinc, chromium, uranium, vanadium, and lead) than a commercial water filter.
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Affiliation(s)
- Oscar Valdés
- Vicerrectoría de Investigación y Postgrado, Universidad Católica del Maule, 3460000 Talca, Chile.
| | - Adolfo Marican
- Instituto de Química de Recursos Naturales, Universidad de Talca, 3460000 Talca, Chile.
| | - Yaneris Mirabal-Gallardo
- Instituto de Ciencias Químicas Aplicadas, Facultad de Ingeniería en Construcción, Universidad Autónoma de Chile, 3460000 Talca, Chile.
| | - Leonardo S Santos
- Laboratory of Asymmetric Synthesis, Instituto de Química de Recursos Naturales, Universidad de Talca, 3460000 Talca, Chile.
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26
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Kaßel M, Gerke J, Ley A, Vana P. Surface Modification of Wood Flour via ARGET ATRP and Its Application as Filler in Thermoplastics. Polymers (Basel) 2018; 10:E354. [PMID: 30966389 DOI: 10.3390/polym10040354] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 03/13/2018] [Accepted: 03/20/2018] [Indexed: 11/16/2022] Open
Abstract
Wood flour is particularly suitable as a filler in thermoplastics because it is environmentally friendly, readily available, and offers a high strength-to-density ratio. To overcome the insufficient interfacial adhesion between hydrophilic wood and a hydrophobic matrix, a thermoplastic polymer was grafted from wood flour via surface-initiated activators regenerated by electron transfer-atom transfer radical polymerization (SI-ARGET ATRP). Wood particles were modified with an ATRP initiator and subsequently grafted with methyl acrylate for different polymerization times in the absence of a sacrificial initiator. The successful grafting of poly(methyl acrylate) (PMA) was demonstrated using attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and water contact angle (WCA) measurements. To confirm the control over the polymerization, a cleavable ATRP initiator was immobilized on the particles, allowing the detachment of the grafted polymer under mild conditions. The grafted particles were incorporated into a PMA matrix using solvent casting and their influence on the mechanical properties (Young's modulus, yield strength, and toughness) of the composite was investigated. Tensile testing showed that the mechanical properties improved with increasing polymerization time and increasing ratio of incorporated grafted particles.
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Ambi A, Parikh N, Vera C, Burns K, Montano N, Sciorra L, Epstein J, Zeng D, Traba C. Anti-infection silver nanoparticle immobilized biomaterials facilitated by argon plasma grafting technology. Biofouling 2018; 34:273-286. [PMID: 29447471 DOI: 10.1080/08927014.2018.1434158] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 01/22/2018] [Indexed: 06/08/2023]
Abstract
Many research groups have attained slow, persistent, continuous release of silver ions through careful experimental design using existing methods. Such methods effectively kill planktonic bacteria and therefore prevent surface adhesion of pathogens. However, the resultant modified coatings cannot provide long-term antibacterial efficacy due to sustained anti-microbial release. In this study, the anti-infection activity of AgNP immobilized biomaterials was evaluated, facilitated by argon plasma grafting technology and activated by bacterial colonization. The modified materials generated in this study showed excellent specificity and were active against both Gram-positive and Gram-negative biofilm forming bacteria, including methicillin-resistant Staphylococcus aureus, Staphylococcus epidermidis, and Escherichia coli. The anti-infection biomaterials developed in this study demonstrate several attractive advantages in comparison to traditional anti-bacterial surfaces loaded with antibiotics or other types of antibacterial agents and include (1) broad spectrum of activity against antibiotic resistant bacteria, (2) the unlikelihood of bacterial resistance, (3) specificity, (4) biocompatibility, and (5) stability.
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Affiliation(s)
- Ashwin Ambi
- a Department of Chemistry , Saint Peter's University , Jersey City , NJ , USA
| | - Nisharg Parikh
- a Department of Chemistry , Saint Peter's University , Jersey City , NJ , USA
| | - Carolina Vera
- a Department of Chemistry , Saint Peter's University , Jersey City , NJ , USA
| | - Krystal Burns
- a Department of Chemistry , Saint Peter's University , Jersey City , NJ , USA
| | - Naidel Montano
- a Department of Chemistry , Saint Peter's University , Jersey City , NJ , USA
| | - Leonard Sciorra
- b Department of Applied Science and Technology , Saint Peter's University , Jersey City , NJ , USA
| | - Jessica Epstein
- a Department of Chemistry , Saint Peter's University , Jersey City , NJ , USA
| | - Debing Zeng
- b Department of Applied Science and Technology , Saint Peter's University , Jersey City , NJ , USA
| | - Christian Traba
- a Department of Chemistry , Saint Peter's University , Jersey City , NJ , USA
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Asadian-Ardakani V, Saber-Samandari S, Saber-Samandari S. The effect of hydroxyapatite in biopolymer-based scaffolds on release of naproxen sodium. J Biomed Mater Res A 2016; 104:2992-3003. [PMID: 27449255 DOI: 10.1002/jbm.a.35838] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [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: 04/16/2016] [Revised: 07/09/2016] [Accepted: 07/21/2016] [Indexed: 11/11/2022]
Abstract
A scaffold capable of controlling drug release is highly desirable for bone tissue engineering. The objective of this study was to develop and characterize a highly porous biodegradable scaffold and evaluate the kinetic release behavior for the application of anti-inflammatory drug delivery. Porous scaffolds consisting of chitosan, poly(acrylic acid), and nano-hydroxyapatite were prepared using the freeze-drying method. The nanocomposite scaffolds were characterized for structure, pore size, porosity, and mechanical properties. The nanocomposite scaffolds were tested and characterized using Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), energy-dispersive analysis of X-ray (EDS), X-ray diffraction (XRD) analysis, and tensile test instrument. The results showed that the pores of the scaffolds were interconnected, and their sizes ranged from 145 µm to 213 μm. The mechanical properties were found close to those of trabecular bone of the same density. The ability of the scaffolds to deliver naproxen sodium as a model drug in vitro was investigated. The release profile of naproxen sodium was measured in a phosphate-buffered saline solution by a ultra-violet spectrophotometer that was controlled by the Fickian diffusion mechanism. These results indicated that the chitosan-graft-poly(acrylic acid)/nano-hydroxyapatite scaffold may be a promising biomedical scaffold for clinical use in bone tissue engineering with a potential for drug delivery. © 2016 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 104A: 2992-3003, 2016.
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Affiliation(s)
| | - Samaneh Saber-Samandari
- Department of Chemistry, Eastern Mediterranean University, Gazimagusa, 10, TRNC via Mersin, Turkey.
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Simaite A, Tondu B, Souères P, Bergaud C. Hybrid PVDF/PVDF-graft-PEGMA Membranes for Improved Interface Strength and Lifetime of PEDOT:PSS/PVDF/Ionic Liquid Actuators. ACS Appl Mater Interfaces 2015; 7:19966-19977. [PMID: 26289948 DOI: 10.1021/acsami.5b04578] [Citation(s) in RCA: 9] [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] [Indexed: 06/04/2023]
Abstract
UNLABELLED The exploitation of soft conducting polymer-based actuators suffers from two main shortcomings: their short life cycle and the reproducibility of the fabrication techniques. The short life cycle usually results from the delamination of the components due to stresses at the interface during the actuation. In this work, to achieve strong adhesion to poly(3,4- ethylenedioxythiophene) poly(styrenesulfonate) ( PEDOT PSS) electrodes, the wetting properties of the surface of a polyvinylidene fluoride (PVDF) membrane are improved using argon-plasma-induced surface polymerization of poly(ethylene glycol) monomethyl ether methacrylate (PEGMA). Hybrid membranes are created with hydrophilic PVDF-graft-PEGMA outer surfaces and hydrophobic bulk. The width of each layer is controlled by spray coating, as it allows for the deposition of the reaction precursor to a certain depth. Subsequently, a PEDOT PSS water solution fills the pores of the functionalized part of the membrane and a mixing layer between PEDOT PSS and PVDF is created. We also show that PVDF-graft-PEGMA copolymers play an important role in binding the membrane to the electrodes and that direct mechanical interlocking in the pores can further improve the adhesion. Finally, PEDOT PSS/PVDF-graft-PEGMA/PEDOT:PSS actuators are made by simple solution casting. They are capable of producing high strains of 0.6% and show no signs of delamination after more than 150 h or 10(4) actuation cycles. Furthermore, the preservation of the hydrophobic membrane in between two PEDOT PSS layers increases the resistance between them from 0.36 Ω to 0.16 MΩ, thus drastically modifying the power dissipation of the actuators.
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Affiliation(s)
- Aiva Simaite
- CNRS, Laboratoire d'Analyse et d'Architecture des Systèmes (LAAS), 7 avenue du Colonel Roche, F-31031, Toulouse, France
- Université de Toulouse , Institut National des Sciences Appliquées (INSA), Laboratoire d'Analyse et d'Architecture des Systèmes (LAAS), F-31400, Toulouse, France
| | - Bertrand Tondu
- CNRS, Laboratoire d'Analyse et d'Architecture des Systèmes (LAAS), 7 avenue du Colonel Roche, F-31031, Toulouse, France
- Université de Toulouse , Institut National des Sciences Appliquées (INSA), Laboratoire d'Analyse et d'Architecture des Systèmes (LAAS), F-31400, Toulouse, France
| | - Philippe Souères
- CNRS, Laboratoire d'Analyse et d'Architecture des Systèmes (LAAS), 7 avenue du Colonel Roche, F-31031, Toulouse, France
- Université de Toulouse , Laboratoire d'Analyse et d'Architecture des Systèmes (LAAS), F-31400, Toulouse, France
| | - Christian Bergaud
- CNRS, Laboratoire d'Analyse et d'Architecture des Systèmes (LAAS), 7 avenue du Colonel Roche, F-31031, Toulouse, France
- Université de Toulouse , Laboratoire d'Analyse et d'Architecture des Systèmes (LAAS), F-31400, Toulouse, France
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Cabane E, Keplinger T, Merk V, Hass P, Burgert I. Renewable and functional wood materials by grafting polymerization within cell walls. ChemSusChem 2014; 7:1020-1025. [PMID: 24616291 DOI: 10.1002/cssc.201301107] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [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: 10/16/2013] [Indexed: 06/03/2023]
Abstract
A "grafting-from" polymerization approach within and at the complex and heterogeneous macromolecular assembly of wood cell walls is shown. The approach allows for the implementation of novel functionalities in renewable and functional wood-based materials. The native wood structure is retained and used as a hierarchical multiscale framework for a modular two-step polymerization process. The versatility and potential of the approach is shown by a polymerization of either hydrophobic or hydrophilic and pH-responsive monomers in the wood structure. Characterization of the modified wood reveals the presence of polymer in the cell wall, and the new properties of these wood materials are discussed.
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Affiliation(s)
- Etienne Cabane
- Wood Materials Science, Institute for Building Materials, ETH Zürich, Stefano-Franscini-Platz 3, 8093 Zürich (Switzerland); Applied Wood Materials, EMPA-Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf (Switzerland).
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Kyomoto M, Moro T, Yamane S, Hashimoto M, Takatori Y, Ishihara K. Effect of UV-irradiation intensity on graft polymerization of 2-methacryloyloxyethyl phosphorylcholine on orthopedic bearing substrate. J Biomed Mater Res A 2013; 102:3012-23. [PMID: 24124003 DOI: 10.1002/jbm.a.34973] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [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: 09/09/2013] [Accepted: 09/24/2013] [Indexed: 12/19/2022]
Abstract
Photoinduced grafting of 2-methacryloyloxyethyl phosphorylcholine (MPC) onto cross-linked polyethylene (CLPE) was investigated for its ability to reduce the wear of orthopedic bearings. We investigated the effect of UV-irradiation intensity on the extent of poly(MPC) (PMPC) grafting, and found that it increased with increasing intensity up to 7.5 mW/cm(2), and the remained fairly constant. It was found to be extremely important to carefully control the UV intensity, as at higher values, a PMPC gel formed via homopolymerization of the MPC, resulting in the formation of cracks at the interface of the PMPC layer and the CLPE substrate. When the CLPE was exposed to UV-irradiation during the graft polymerization process, some of its physical and mechanical properties were slightly changed due to cross-linking and scission effects in the surface region; however, the results of all of the tests exceed the lower limits of the ASTM standards. Modification of the CLPE surface with the hydrophilic PMPC layer increased lubrication to levels that match articular cartilage. The highly hydrated thin PMPC films mimicked the native cartilage extracellular matrix that covers synovial joint surface, acting as an extremely efficient lubricant, and providing high-wear resistance.
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Affiliation(s)
- Masayuki Kyomoto
- Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan; Division of Science for Joint Reconstruction, Graduate School of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan; Research Department, KYOCERA Medical Corporation, 3-3-31, Miyahara, Yodogawa-ku, Osaka, 532-0003, Japan
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