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Winters C, Carsi M, Sanchis MJ, Culebras M, Collins MN. On the design of lignin reinforced acrylic acid/hyaluronic acid adhesive hydrogels with conductive PEDOT:HA nanoparticles. Int J Biol Macromol 2024; 273:133093. [PMID: 38866291 DOI: 10.1016/j.ijbiomac.2024.133093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/19/2024] [Accepted: 06/09/2024] [Indexed: 06/14/2024]
Abstract
Hydrogels are of great importance in biomedical engineering. They possess the ability to mimic bodily soft tissues, and this allows exciting possibilities for applications such as tissue engineering, drug delivery and wound healing, however much work remains on stability and mechanical robustness to allow for translation to clinical applications. The work herein describes the synthesis and analysis of a biocompatible, versatile hydrogel that has tailorable swelling, high stability when swollen and thermal stability. The synthesis methods used produce a hydrogel with high elasticity, good mechanical properties and rapid crosslinking whilst displaying biocompatibility, adhesion, and conductivity. It has been shown that cell viability in the samples is above 80 % in all cases, a Young's Modulus of up to 85 kPa and high swelling degrees were achieved. These materials show potential for use in numerous applications such as adhesive sensors, skin grafts and drug delivery systems.
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Affiliation(s)
- Caitriona Winters
- Stokes Labs, Bernal Institute, School of Engineering, University of Limerick, Ireland
| | - Marta Carsi
- Instituto de Automática E Informática Industrial, Universitat Politècnica de Valencia, 46022, Valencia, Spain
| | - Maria J Sanchis
- Departamento de Termodinámica Aplicada, Instituto Tecnológico de La Energía, Universitat Politècnica de València, Camí de Vera S/N, 46022, Valencia, Spain
| | - Mario Culebras
- Institute of Material Science (ICMUV), University of Valencia, 46980, Spain
| | - Maurice N Collins
- Stokes Labs, Bernal Institute, School of Engineering, University of Limerick, Ireland; Health Research Institute, University of Limerick, Ireland; SFI AMBER Centre, University of Limerick, Ireland.
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2
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Chen H, Feng R, Xia T, Wen Z, Li Q, Qiu X, Huang B, Li Y. Progress in Surface Modification of Titanium Implants by Hydrogel Coatings. Gels 2023; 9:gels9050423. [PMID: 37233014 DOI: 10.3390/gels9050423] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 05/16/2023] [Accepted: 05/17/2023] [Indexed: 05/27/2023] Open
Abstract
Although titanium and titanium alloys have become the preferred materials for various medical implants, surface modification technology still needs to be strengthened in order to adapt to the complex physiological environment of the human body. Compared with physical or chemical modification methods, biochemical modification, such as the introduction of functional hydrogel coating on implants, can fix biomolecules such as proteins, peptides, growth factors, polysaccharides, or nucleotides on the surface of the implants, so that they can directly participate in biological processes; regulate cell adhesion, proliferation, migration, and differentiation; and improve the biological activity on the surface of the implants. This review begins with a look at common substrate materials for hydrogel coatings on implant surfaces, including natural polymers such as collagen, gelatin, chitosan, and alginate, and synthetic materials such as polyvinyl alcohol, polyacrylamide, polyethylene glycol, and polyacrylic acid. Then, the common construction methods of hydrogel coating (electrochemical method, sol-gel method and layer-by-layer self-assembly method) are introduced. Finally, five aspects of the enhancement effect of hydrogel coating on the surface bioactivity of titanium and titanium alloy implants are described: osseointegration, angiogenesis, macrophage polarization, antibacterial effects, and drug delivery. In this paper, we also summarize the latest research progress and point out the future research direction. After searching, no previous relevant literature reporting this information was found.
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Affiliation(s)
- Huangqin Chen
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Rui Feng
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Tian Xia
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Zhehan Wen
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Qing Li
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Xin Qiu
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Bin Huang
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Yuesheng Li
- Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Non-Power Nuclear Technology Collaborative Innovation Center, Hubei University of Science and Technology, Xianning 437100, China
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3
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Pourmadadi M, Farokh A, Rahmani E, Eshaghi MM, Aslani A, Rahdar A, Ferreira LFR. Polyacrylic acid mediated targeted drug delivery nano-systems: A review. J Drug Deliv Sci Technol 2023. [DOI: 10.1016/j.jddst.2023.104169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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4
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Teixeira GTL, Gelamo RV, Mateus Santos Obata M, Andrade Silva LED, Silva MVD, Oliveira CJFD, Silva BPD, Aoki IV, Moreto JA, Slade NBL. Exploring the functionalization of Ti-6Al-4V alloy with the novel antimicrobial peptide JIChis-2 via plasma polymerization. BIOFOULING 2023; 39:47-63. [PMID: 36856008 DOI: 10.1080/08927014.2023.2183121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 02/14/2023] [Accepted: 02/15/2023] [Indexed: 06/18/2023]
Abstract
This study aimed to characterize the immobilization of the novel JIChis-2 peptide on the Ti-6Al-4V alloy, widely used in the biomedical sector. The antimicrobial activity of JIChis-2 was evaluated in the Gram-negative bacterium E. coli. Its immobilization occurred by inducing the formation of covalent bonds between the N-terminus of the peptides and the surface previously submitted to acrylic acid polymerization via the PECVD technique. Coated and uncoated surfaces were characterized by FTIR, AFM, SEM and EDX. Studies of global and localized corrosion were carried out, seeking to explore the effects triggered by surface treatment in an aggressive environment. Additionally, the ability of the functionalized material to prevent E. coli biofilm formation evidenced that the strategy to immobilize JIChis-2 in the Ti-6Al-4V alloy via PECVD of acrylic acid resulted in the development of a functional material with antibiofilm properties.
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Affiliation(s)
- Gabriella Teresinha Lima Teixeira
- Institute of Exact and Natural Sciences and Education, Federal University of Triângulo Mineiro (UFTM), Univerdecidade, Uberaba, Minas Gerais, Brazil
- Department of Physics, Federal University of Triângulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil
| | - Rogério Valentim Gelamo
- Department of Physics, Federal University of Triângulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil
- Institute of Technological and Exact Sciences, Federal University of Triângulo Mineiro (UFTM), Univerdecidade, Uberaba, Minas Gerais, Brazil
| | - Malu Mateus Santos Obata
- Department of Immunology, Microbiology and Parasitology, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | | | - Marcos Vinícius da Silva
- Department of Immunology, Microbiology and Parasitology, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Carlo José Freire de Oliveira
- Department of Immunology, Microbiology and Parasitology, Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Brunela Pereira da Silva
- Polytechnic School, Chemical Engineering Department, University of São Paulo, Av. Prof. Luciano Gualberto, São Paulo, São Paulo, Brazil
| | - Idalina Vieira Aoki
- Polytechnic School, Chemical Engineering Department, University of São Paulo, Av. Prof. Luciano Gualberto, São Paulo, São Paulo, Brazil
| | - Jeferson Aparecido Moreto
- Institute of Exact and Natural Sciences and Education, Federal University of Triângulo Mineiro (UFTM), Univerdecidade, Uberaba, Minas Gerais, Brazil
- Department of Physics, Federal University of Triângulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil
| | - Natália Bueno Leite Slade
- Institute of Exact and Natural Sciences and Education, Federal University of Triângulo Mineiro (UFTM), Univerdecidade, Uberaba, Minas Gerais, Brazil
- Department of Physics, Federal University of Triângulo Mineiro (UFTM), Uberaba, Minas Gerais, Brazil
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5
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Electrosynthesis of poly (4-amino-3-nitrostyrene) film and its characterization. J APPL ELECTROCHEM 2022. [DOI: 10.1007/s10800-022-01775-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Alam M, Zafar F, Ghosal A, Ahmed M. Formulation of silica‐based corn oil transformed polyester acryl amide‐phenol formaldehyde corrosion resistant coating material. J Appl Polym Sci 2021. [DOI: 10.1002/app.51651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Manawwer Alam
- Department of Chemistry College of Science, King Saud University Riyadh Saudi Arabia
| | - Fahmina Zafar
- Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia New Delhi India
| | - Anujit Ghosal
- Department of Food and Human Nutritional Sciences The University of Manitoba Winnipeg Canada
| | - Mukhtar Ahmed
- Department of Zoology College of Science, King Saud University Riyadh Saudi Arabia
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Hoang VQ, Vu TH, Dang HT, Kim MI, Bark CW. Investigation of the influence of TiO 2distribution on HA/TiO 2composite wetting ability using the dispersant SDBS, high-temperature annealing, and ultrasonication. Biomed Mater 2021; 16. [PMID: 34038877 DOI: 10.1088/1748-605x/ac0591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 05/26/2021] [Indexed: 11/12/2022]
Abstract
The use of composites such as hydroxyapatite (HA)/TiO2in bioapplications has attracted increasing attention in recent years. Herein, for the enhancement wetting ability and biocompatibility, the HA/TiO2composite was subjected to different treatments to improve nanoparticle (NP) distribution and surface energy with an aim of mitigating nanotoxicity concerns. The treatments included ultrasonication, high-temperature annealing, and addition of a dispersant and surfactant, sodium dodecylbenzenesulfonate (SDBS). Contact angle measurement tests revealed the effect of SDBS addition on the distribution of TiO2NPs on the HA surface: a decrease in the contact angle and, thus, an increase in the wetting ability of the HA/TiO2composite were observed. The combination of annealing and SDBS addition treatments allowed for guest TiO2particles to be uniformly distributed on the surface of the host HA particles, showing a rapid conversion from a hydrophobic to superhydrophilic property.In vitroinvestigation suggested that the cell viabilities of annealed HA/TiO2, SDBS-added HA/TiO2, and SDBS-added and annealed HA/TiO2reached 89.7%, 94.7%, and 95.8%, respectively, while those of HA and untreated HA/TiO2were 80.3% and 86.9%, respectively. The modified composites exhibited lower cytotoxicities than the unmodified systems (HA and HA/TiO2). Furthermore, the cell adhesion behavior of the composites was confirmed through actin-4',6-Diamidino-2-phenylindole (DAPI) staining, which showed negligible changes in the cytoskeleton architecture of the cells. This study confirmed that a modified HA/TiO2composite has potential for bioapplications.
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Affiliation(s)
- Van Quy Hoang
- Department of Electrical Engineering, Gachon University, Seongnam, Gyeonggi 13120, Republic of Korea
| | - Trung Hieu Vu
- Department of BioNano Technology, Gachon University, Seongnam, Gyeonggi 13120, Republic of Korea
| | - Hai Truyen Dang
- Department of Electrical Engineering, Gachon University, Seongnam, Gyeonggi 13120, Republic of Korea
| | - Moon Il Kim
- Department of BioNano Technology, Gachon University, Seongnam, Gyeonggi 13120, Republic of Korea
| | - Chung Wung Bark
- Department of Electrical Engineering, Gachon University, Seongnam, Gyeonggi 13120, Republic of Korea
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8
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Comparative adhesion of chemically and physically crosslinked poly(acrylic acid)-based hydrogels to soft tissues. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2020.110250] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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9
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Dutta D, Nath LK, Chakraborty P, Dutta D. Targeting Gemcitabine hydrochloride to tumor microenvironment through stimuli-responsive Nano-conjugate: Synthesis, characterization, and in vitro assessment. J Drug Deliv Sci Technol 2020. [DOI: 10.1016/j.jddst.2020.101981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Dong W, Lin T, Huang J, Wang Y, Zhang Z, Wang X, Yuan X, Lin J, Chen IW, Huang F. Electrodes with Electrodeposited Water-excluding Polymer Coating Enable High-Voltage Aqueous Supercapacitors. RESEARCH 2020; 2020:4178179. [PMID: 33103117 PMCID: PMC7568819 DOI: 10.34133/2020/4178179] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Accepted: 09/06/2020] [Indexed: 11/30/2022]
Abstract
Aqueous supercapacitors are powerful energy sources, but they are limited by energy density that is much lower than lithium-ion batteries. Since raising the voltage beyond the thermodynamic potential for water splitting (1.23 V) can boost the energy density, there has been much effort on water-stabilizing salvation additives such as Li2SO4 that can provide an aqueous electrolyte capable of withstanding ~1.8 V. Guided by the first-principles calculations that reveal water can promote hydrogen and oxygen evolution reactions, here, we pursue a new strategy of covering the electrode with a dense electroplated polymerized polyacrylic acid, which is an electron insulator but a proton conductor and proton reservoir. The combined effect of salvation and coating expands the electrochemical window throughout pH 3 to pH 10 to 2.4 V for both fast and slow proton-mediated redox reactions. This allows activated carbon to quadruple the energy density, a kilogram of nitrogen-doped graphene to provide 127 Watt-hour, and both to have improved endurance because of suppression of water-mediated corrosion. Therefore, aqueous supercapacitors can now achieve energy densities quite comparable to that of a lithium-ion battery, but at 100 times the charging/discharging speed and cycle durability.
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Affiliation(s)
- Wujie Dong
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Tianquan Lin
- State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Jian Huang
- State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Yuan Wang
- State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Zhichao Zhang
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Xin Wang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Xiaotao Yuan
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
| | - Jie Lin
- State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - I-Wei Chen
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Fuqiang Huang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.,State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
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11
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Dynamic viscosity recovery of electrospinning solution for stabilizing elongated ultrafine polymer nanofiber by TEMPO-CNF. Sci Rep 2020; 10:13427. [PMID: 32778719 PMCID: PMC7417572 DOI: 10.1038/s41598-020-69136-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/07/2020] [Indexed: 12/12/2022] Open
Abstract
Electrospinning is a widely used production method for nanoscale fine polymer fiber fabrics. An ultrafine fiber made of polymers such as polyvinylpyrrolidone (PVP) polyacrylic acid (PAA) has immense potential for applications in air filters, batteries, and biosensors. However, producing fabrics with long uniformly distributed ultrafine fibers of a mean diameter below ~ 200 nm is still a challenge, because such elongated-ultrafine fibers tend to break into beads before they reach the collector. Here, we exploits the thixotropy of the solution given by the addition of 2,2,6,6-tetramethylpiperidin-1-oxyl-oxidized cellulose nanofibers to recover the solution viscosity for stabilizing the electrostatically elongated nanofibers, whereby the solution is smooth in the syringe needle owing to the shear force but regain its original viscosity after being freed from electrostatic force. Using this method, we successfully fabricated a non-woven ultrafine-long nanofiber made of PVP and PAA with a mean diameter as low as ~ 90 nm with a negligible number of beads.
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12
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Bonifacio MA, Cerqueni G, Cometa S, Licini C, Sabbatini L, Mattioli-Belmonte M, De Giglio E. Insights into Arbutin Effects on Bone Cells: Towards the Development of Antioxidant Titanium Implants. Antioxidants (Basel) 2020; 9:antiox9070579. [PMID: 32630762 PMCID: PMC7402158 DOI: 10.3390/antiox9070579] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 06/24/2020] [Accepted: 06/29/2020] [Indexed: 12/14/2022] Open
Abstract
Arbutin is a plant-derived glycosylated hydroquinone with antioxidant features, exploited to combat cell damage induced by oxidative stress. The latter hinders the osseointegration of bone prostheses, leading to implant failure. Little is known about arbutin antioxidant effects on human osteoblasts, therefore, this study explores the in vitro protective role of arbutin on osteoblast-like cells (Saos-2) and periosteum-derived progenitor cells (PDPCs). Interestingly, cells exposed to oxidative stress were protected by arbutin, which preserved cell viability and differentiation. Starting from these encouraging results, an antioxidant coating loaded with arbutin was electrosynthesized on titanium. Therefore, for the first time, a polyacrylate-based system was designed to release the effective concentration of arbutin in situ. The innovative coating was characterized from the physico-chemical and morphological point of view to achieve an optimized system, which was in vitro tested with cells. Morpho-functional evaluations highlighted the high viability and good compatibility of the arbutin-loaded coating, which also promoted the expression of PDPC differentiation markers, even under oxidative stress. These results agreed with the coatings’ in vitro antioxidant activity, which showed a powerful scavenging effect against DPPH radicals. Taken together, the obtained results open intriguing opportunities for the further development of natural bioactive coatings for orthopedic titanium implants.
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Affiliation(s)
- Maria A. Bonifacio
- Department of Chemistry, University of Bari Aldo Moro, 70126 Bari, Italy; (M.A.B.); (L.S.)
- Jaber Innovation s.r.l., 00144 Roma, Italy;
| | - Giorgia Cerqueni
- DISCLIMO Department of Clinical and Molecular Sciences, Università Politecnica delle Marche, 60126 Ancona, Italy; (G.C.); (C.L.); (M.M.-B.)
| | | | - Caterina Licini
- DISCLIMO Department of Clinical and Molecular Sciences, Università Politecnica delle Marche, 60126 Ancona, Italy; (G.C.); (C.L.); (M.M.-B.)
- DISAT—Department of Applied Science and Technology, Polytechnic of Turin, 10129 Turin, Italy
| | - Luigia Sabbatini
- Department of Chemistry, University of Bari Aldo Moro, 70126 Bari, Italy; (M.A.B.); (L.S.)
| | - Monica Mattioli-Belmonte
- DISCLIMO Department of Clinical and Molecular Sciences, Università Politecnica delle Marche, 60126 Ancona, Italy; (G.C.); (C.L.); (M.M.-B.)
| | - Elvira De Giglio
- Department of Chemistry, University of Bari Aldo Moro, 70126 Bari, Italy; (M.A.B.); (L.S.)
- Correspondence: ; Tel.: +39-080-544-2021
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Cometa S, Bonifacio MA, Ferreira AM, Gentile P, De Giglio E. Surface Characterization of Electro-Assisted Titanium Implants: A Multi-Technique Approach. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E705. [PMID: 32033256 PMCID: PMC7040792 DOI: 10.3390/ma13030705] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 01/17/2020] [Accepted: 01/22/2020] [Indexed: 12/20/2022]
Abstract
The understanding of chemical-physical, morphological, and mechanical properties of polymer coatings is a crucial preliminary step for further biological evaluation of the processes occurring on the coatings' surface. Several studies have demonstrated how surface properties play a key role in the interactions between biomolecules (e.g., proteins, cells, extracellular matrix, and biological fluids) and titanium, such as chemical composition (investigated by means of XPS, TOF-SIMS, and ATR-FTIR), morphology (SEM-EDX), roughness (AFM), thickness (Ellipsometry), wettability (CA), solution-surface interactions (QCM-D), and mechanical features (hardness, elastic modulus, adhesion, and fatigue strength). In this review, we report an overview of the main analytical and mechanical methods commonly used to characterize polymer-based coatings deposited on titanium implants by electro-assisted techniques. A description of the relevance and shortcomings of each technique is described, in order to provide suitable information for the design and characterization of advanced coatings or for the optimization of the existing ones.
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Affiliation(s)
| | - Maria A. Bonifacio
- Jaber Innovation s.r.l., 00144 Rome, Italy;
- Department of Chemistry, University of Bari “Aldo Moro”, 70126 Bari, Italy;
| | - Ana M. Ferreira
- School of Engineering, Newcastle University, Newcastle NE1 7RU, UK; (A.M.F.); (P.G.)
| | - Piergiorgio Gentile
- School of Engineering, Newcastle University, Newcastle NE1 7RU, UK; (A.M.F.); (P.G.)
| | - Elvira De Giglio
- Department of Chemistry, University of Bari “Aldo Moro”, 70126 Bari, Italy;
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14
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Cozens EJ, Kong D, Roohpour N, Gautrot JE. The physico-chemistry of adhesions of protein resistant and weak polyelectrolyte brushes to cells and tissues. SOFT MATTER 2020; 16:505-522. [PMID: 31804646 DOI: 10.1039/c9sm01403a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The non-specific adhesion of polymers and soft tissues is of great interest to the field of biomedical engineering, as it will shed light on some of the processes that regulate interactions between scaffolds, implants and nanoparticles with surrounding tissues after implantation or delivery. In order to promote adhesion to soft tissues, a greater understanding of the relationship between polymer chemistry and nanoscale adhesion mechanisms is required. In this work, we grew poly(dimethylaminoethyl methacrylate) (PDMAEMA), poly(acrylic acid) (PAA) and poly(oligoethylene glycol methacrylate) (POEGMA) brushes from the surface of silica beads, and investigated their adhesion to a variety of substrates via colloidal probe-based atomic force microscopy (AFM). We first characterised adhesion to a range of substrates with defined surface chemistry (self-assembled monolayers (SAMs) with a range of hydrophilicities, charge and hydrogen bonding), before studying the adhesion of brushes to epithelial cell monolayers (primary keratinocytes and HaCaT cells) and soft tissues (porcine epicardium and keratinized gingiva). Adhesion assays to SAMs reveal the complex balance of interactions (electrostatic, van der Waals interactions and hydrogen bonding) regulating the adhesion of weak polyelectrolyte brushes. This resulted in particularly strong adhesion of PAA brushes to a wide range of surface chemistries. In turn, colloidal probe microscopy on cell monolayers highlighted the importance of the glycocalyx in regulating non-specific adhesions. This was also reflected by the adhesive properties of soft tissues, in combination with their mechanical properties. Overall, this work clearly demonstrates the complex nature of interactions between polymeric biomaterials and biological samples and highlights the need for relatively elaborate models to predict these interactions.
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Affiliation(s)
- Edward J Cozens
- Institute of Bioengineering and Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS, UK.
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15
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Medeiros MFXP, Leyva ME, Queiroz AAAD, Maron LB. Electropolymerization of polyaniline nanowires on poly(2-hydroxyethyl methacrylate) coated Platinum electrode. POLIMEROS 2020. [DOI: 10.1590/0104-1428.02020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
| | - Maria Elena Leyva
- Universidade Federal de Itajubá, Brasil; Universidade Federal de Itajubá, Brasil
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16
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Yahata C, Suzuki J, Mochizuki A. Biocompatibility and adhesive strength properties of poly(methyl acrylate-co-acrylic acid) as a function of acrylic acid content. J BIOACT COMPAT POL 2019. [DOI: 10.1177/0883911519877427] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Metals and metal alloys are widely used in medical devices that contact blood and/or tissue, and various coating materials for the metal parts have been proposed to improve surface properties such as biocompatibility. This study aims to understand the performance of new coating materials, copolymers of methyl acrylate and acrylic acid, in terms of their biocompatibility and adhesive strength to a metal surface. Blood compatibility was investigated through platelet and coagulation system responses. Cytocompatibility was studied in three cell-line types (endothelium, smooth muscle, and fibroblasts) in terms of cell viability and morphology; these tests showed that compatibility depended on the cell types and acrylic acid content of the copolymers. Because of their blood compatibility and adhesion strength, the methyl acrylate and acrylic acid copolymers containing 10–24 mol% acrylic acid were found to be excellent candidates as potential coating materials for devices contacting blood.
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Affiliation(s)
- Chie Yahata
- Department of Biomedical Engineering, School of Engineering, Tokai University, Isehara, Japan
| | - Junya Suzuki
- Department of Biomedical Engineering, School of Engineering, Tokai University, Isehara, Japan
| | - Akira Mochizuki
- Department of Biomedical Engineering, School of Engineering, Tokai University, Isehara, Japan
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17
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Meng Y, Liu X, Li C, Liu H, Cheng Y, Lu J, Zhang K, Wang H. Super-swelling lignin-based biopolymer hydrogels for soil water retention from paper industry waste. Int J Biol Macromol 2019; 135:815-820. [PMID: 31145959 DOI: 10.1016/j.ijbiomac.2019.05.195] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 05/26/2019] [Accepted: 05/26/2019] [Indexed: 02/07/2023]
Abstract
Sources of pulping red liquor, which is produced by acidic sulfite cooking in paper industry, consisted of lignosulphonate and polysaccharide, commonly considered as waste or byproducts and used in low value, such as surfactant and adhesive are wide and its price is low. Here a novel method for high value-added utilization of the pulp and paper industry waste for fabricating super-swelling biopolymer hydrogels is introduced. In contrast to other costly utilizations, which are needed to separate red liquor or purify hemicellulose and lignin before using, it is first time to directly utilize red liquor to prepare hydrogels without pretreatment. FT-IR, SEM, TGA and XRD are used to determine structure and morphology of hydrogels. It is excited the hydrogels fabricated from acrylic (AA) and industry waste exhibit super-swelling and slow release behaviors in water. Compared with synthetic materials, the hydrogels are at low price to be chosen as candidates for water retention agent for agriculture.
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Affiliation(s)
- Yi Meng
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, Liaoning, China
| | - Xueqian Liu
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, Liaoning, China
| | - Chengxiang Li
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, Liaoning, China
| | - Huan Liu
- Wood Technology and Wood Chemistry, University of Goettingen, Büsgenweg 4, 37077 Goettingen, Germany
| | - Yi Cheng
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, Liaoning, China
| | - Jie Lu
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, Liaoning, China
| | - Kai Zhang
- Wood Technology and Wood Chemistry, University of Goettingen, Büsgenweg 4, 37077 Goettingen, Germany.
| | - Haisong Wang
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, Liaoning, China.
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18
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Arifuzzaman M, Millhouse PW, Raval Y, Pace TB, Behrend CJ, Behbahani SB, DesJarins JD, Tzeng TRJ, Anker JN. An implanted pH sensor read using radiography. Analyst 2019; 144:2984-2993. [PMID: 30888348 PMCID: PMC6491216 DOI: 10.1039/c8an02337a] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A biomedical sensor was developed to measure local pH near orthopedic implants to detect and study implant-associated infection. The sensor is read using plain radiography, a technique which is noninvasive, inexpensive, ubiquitously available in medical facilities, and routinely used in diagnosis and follow-up. The sensor comprises a radiopaque tungsten indicator pin embedded within a chemically responsive hydrogel that exhibits a pH-dependent swelling. A stainless steel well holds this hydrogel and attaches to an orthopedic plate. The local pH may be determined from the extent of hydrogel swelling by radiographically measuring the indicator position relative to the well. We calibrated the sensor in a series of standard pH buffers and tested it during bacterial growth in culture. The sensor was robust: its response was negligibly affected by changes in temperature, ionic strength within the normal physiological range, or long-term incubation with reactive oxygen species generated from hydrogen peroxide and copper. Pooled data from several sensors fabricated at different times and tested in different conditions had a root-mean-square deviation from a pH electrode reading of 0.24 pH units. Radiographic measurements were also performed in cadaveric tissue with the sensor attached to an orthopedic plate fixed to a tibia. Pin position readings varied by 100 μm between observers surveying the same radiographs, corresponding to 0.065 pH units precision in the range pH 4-8. The sensor was designed to augment standard radiographs of tissue, bony anatomy, and hardware by also indicating local chemical concentrations.
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Affiliation(s)
| | | | - Yash Raval
- Department of Biological Sciences, Clemson University, Clemson, SC
| | - Thomas B. Pace
- Department of Orthopedic Surgery, Greenville Health System (GHS), and University of South Carolina School of Medicine-Greenville (USCSOMG), Greenville, SC
| | - Caleb J. Behrend
- Department of Bioengineering, Clemson University, Clemson, SC
- OrthoArizona, Pheonix AZ
| | | | | | | | - Jeffrey N. Anker
- Department of Chemistry, Clemson University, Clemson, SC
- Department of Bioengineering, Clemson University, Clemson, SC
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19
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Electrochemical Strategies for Titanium Implant Polymeric Coatings: The Why and How. COATINGS 2019. [DOI: 10.3390/coatings9040268] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Among the several strategies aimed at polymeric coatings deposition on titanium (Ti) and its alloys, metals commonly used in orthopaedic and orthodontic prosthesis, electrochemical approaches have gained growing interest, thanks to their high versatility. In this review, we will present two main electrochemical procedures to obtain stable, low cost and reliable polymeric coatings: electrochemical polymerization and electrophoretic deposition. Distinction should be made between bioinert films—having mainly the purpose of hindering corrosive processes of the underlying metal—and bioactive films—capable of improving biological compatibility, avoiding inflammation or implant-associated infection processes, and so forth. However, very often, these two objectives have been pursued and achieved contemporaneously. Indeed, the ideal coating is a system in which anti-corrosion, anti-infection and osseointegration can be obtained simultaneously. The ultimate goal of all these coatings is the better control of properties and processes occurring at the titanium interface, with a special emphasis on the cell-coating interactions. Finally, advantages and drawbacks of these electrochemical strategies have been highlighted in the concluding remarks.
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20
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Rabizadeh T, Morgan DJ, Peacock CL, Benning LG. Effectiveness of Green Additives vs Poly(acrylic acid) in Inhibiting Calcium Sulfate Dihydrate Crystallization. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b02904] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Taher Rabizadeh
- School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom
- Department of Materials Engineering, Faculty of Mechanical Engineering, University of Tabriz, 51666-16471 Tabriz, Iran
| | - David J. Morgan
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff CF10 3AT, United Kingdom
| | - Caroline L. Peacock
- School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom
| | - Liane G. Benning
- School of Earth and Environment, University of Leeds, Leeds LS2 9JT, United Kingdom
- GFZ, German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany
- Department of Earth Sciences, Free University of Berlin, 12249 Berlin, Germany
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21
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Cometa S, Bonifacio MA, Baruzzi F, de Candia S, Giangregorio MM, Giannossa LC, Dicarlo M, Mattioli-Belmonte M, Sabbatini L, De Giglio E. Silver-loaded chitosan coating as an integrated approach to face titanium implant-associated infections: analytical characterization and biological activity. Anal Bioanal Chem 2017; 409:7211-7221. [DOI: 10.1007/s00216-017-0685-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 09/26/2017] [Accepted: 09/29/2017] [Indexed: 12/01/2022]
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22
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Bonifacio MA, Cometa S, Dicarlo M, Baruzzi F, de Candia S, Gloria A, Giangregorio MM, Mattioli-Belmonte M, De Giglio E. Gallium-modified chitosan/poly(acrylic acid) bilayer coatings for improved titanium implant performances. Carbohydr Polym 2017; 166:348-357. [PMID: 28385242 DOI: 10.1016/j.carbpol.2017.03.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 02/28/2017] [Accepted: 03/05/2017] [Indexed: 11/29/2022]
Abstract
A gallium-modified chitosan/poly(acrylic acid) bilayer was obtained by electrochemical techniques on titanium to reduce orthopaedic and/or dental implants failure. The bilayer in vitro antibacterial properties and biocompatibility were evaluated against Escherichia coli and Pseudomonas aeruginosa and on MG63 osteoblast-like cells, respectively. Gallium loading into the bilayer was carefully tuned by the electrochemical deposition time to ensure the best balance between antibacterial activity and cytocompatibility. The 30min deposition time was able to reduce in vitro the viable cell counts of E. coli and P. aeruginosa of 2 and 3 log cfu/sheet, respectively. Our results evidenced that the developed antibacterial coating did not considerably alter the mechanical flexural properties of titanium substrates and, in addition, influenced positively MG63 adhesion and proliferation. Therefore, the gallium-modified chitosan/poly(acrylic acid) bilayer can be exploited as a promising titanium coating to limit bacterial adhesion and proliferation, while maintaining osseointegrative potential.
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Affiliation(s)
| | | | - Manuela Dicarlo
- Dept. of Clinical and Molecular Sciences, Università Politecnica delle Marche, Ancona, Italy
| | - Federico Baruzzi
- Institute of Sciences of Food Production (ISPA-CNR), National Research Council of Italy, Bari
| | - Silvia de Candia
- Institute of Sciences of Food Production (ISPA-CNR), National Research Council of Italy, Bari
| | - Antonio Gloria
- Institute of Polymers, Composites and Biomaterials (IPCB-CNR), National Research Council of Italy, Napoli, Italy
| | - Maria M Giangregorio
- Institute of Nanotechnology (NANOTEC-CNR), National Research Council of Italy, Bari, Italy
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23
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Zhao X, Xiong D, Wang K, Wang N. Improved biotribological properties of PEEK by photo-induced graft polymerization of acrylic acid. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:777-783. [PMID: 28415528 DOI: 10.1016/j.msec.2017.02.147] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Revised: 12/21/2016] [Accepted: 02/24/2017] [Indexed: 10/20/2022]
Abstract
The keys of biomaterials application in artificial joints are good hydrophilicity and wear resistance. One kind of the potential bio-implant materials is polyetheretherketone (PEEK), which has some excellent properties such as non-toxic and good biocompatibility. However, its bioinert surface and inherent chemical inertness hinder its application. In this study, we reported an efficient method for improving the surface wettability and wear resistance for PEEK, a layer of acrylic acid (AA) polymer brushes on PEEK surface was prepared by UV-initiated graft polymerization. The effects of different grafting parameters (UV-irradiation time/AA monomer solution concentration) on surface characteristics were clearly investigated, and the AA-g-PEEK specimens were examined by ATR-FTIR, static water contact angle measurements and friction tests. Our results reveal that AA can be successfully grafted onto the PEEK surface after UV irradiation, the water wettability and tribological properties of AA-g-PEEK are much better than untreated PEEK because that AA is a hydrophilic monomer, the AA layer on PEEK surface can improve its bearing capacity and reduce abrasion. This detailed understanding of the grafting parameters allows us to accurately control the experimental products, and this method of surface modification broadens the use of PEEK in orthopedic implants.
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Affiliation(s)
- Xiaoduo Zhao
- School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China; Jiangsu Key Laboratory of Advanced Micro/Nano Materials and Technology, 210094 Nanjing, China
| | - Dangsheng Xiong
- School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China; Jiangsu Key Laboratory of Advanced Micro/Nano Materials and Technology, 210094 Nanjing, China.
| | - Kun Wang
- School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China; Jiangsu Key Laboratory of Advanced Micro/Nano Materials and Technology, 210094 Nanjing, China
| | - Nan Wang
- School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094 Nanjing, China; Jiangsu Key Laboratory of Advanced Micro/Nano Materials and Technology, 210094 Nanjing, China
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24
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Zhang CX, Falentin-Daudre C, Migonney V. Titanium alloy surface coatings using poly(sodium styrene sulfonate) and poly(acrylic acid). Biomed Mater Eng 2017; 27:657-668. [DOI: 10.3233/bme-161616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Cong Xiao Zhang
- Department of Stomatology, The First Hospital of JiLin University, 71 XinMin Street, Changchun, JiLin Province, China
| | - Celine Falentin-Daudre
- LBPS, CSPBAT, UMR CNRS 7244, Université Paris 13, 99 Avenue JB Clément, Villetaneuse, France
| | - Veronique Migonney
- LBPS, CSPBAT, UMR CNRS 7244, Université Paris 13, 99 Avenue JB Clément, Villetaneuse, France
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25
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Dispersion of Titanium Oxide Nanoparticles in Aqueous Solution with Anionic Stabilizer via Ultrasonic Wave. ACTA ACUST UNITED AC 2016. [DOI: 10.1155/2016/6539581] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This paper aims to reveal the effects of odium hexametaphosphate (SHMP) and polyacrylic acid (PAA) on dispersion of TiO2 (P25) nanopowder in de-ionic water through ultrasonic horn. We characterized TiO2 suspension by transmission electron microscopy (TEM), dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FTIR), zeta potential, and surface contact angle instruments. As shown in the results, particularly, it were noticed that (1) the SHMP has better dispersion than PAA due to electronegativity effect, resulting in that the average particle size of the dispersed titanium dioxide in de-ionic water was roughly 92 nm, and (2) the zeta potential of TiO2 suspension with SHMP can be achieved by 54 mV at pH value of 7.7, causing stronger electrostatic repulsion in the suspension solution, compared with PAA.
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26
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Yu R, Zheng S. Poly(acrylic acid)-grafted poly(N-isopropyl acrylamide) networks: preparation, characterization and hydrogel behavior. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2016; 22:2305-24. [PMID: 21092421 DOI: 10.1163/092050610x538722] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Poly(acrylic acid)-grafted poly(N-isopropylacrylamide) co-polymer networks (PNIPAAm-g-PAA) were prepared via the reversible addition-fragmentation transfer (RAFT) polymerization of N-isopropyl- acrylamide (NIPAAm) with trithiocarbonate-terminated PAA as a macromolecular chain-transfer agent in the presence of N,N-methylenebisacrylamide. The PNIPAAm-g-PAA co-polymer networks were characterized by means of Fourier transform infrared spectroscopy, differential scanning calorimetry and small-angle X-ray scattering. It is found that the PNIPAAm-g-PAA co-polymer networks were microphase-separated, in which the microdomains of PNIPAAm-PAA interpolymer complexes were dispersed into the PNIPAAm matrix. The PNIPAAm-g-PAA hydrogels displayed a dual response to temperature and pH values. The thermoresponsive properties of PNIPAAm-g-PAA networks were investigated. Below the volume phase transition temperatures, the PNIPAAm-g-PAA hydrogels possessed much higher swelling ratios than control PNIPAAm hydrogel. In terms of swelling, deswelling and reswelling tests, it is judged that the PNIPAAm-g-PAA hydrogels displayed faster response to the external temperature changes than control PNIPAAm hydrogel. The improved thermoresponsive properties of hydrogels are ascribed to the formation of PAA-grafted PNIPAAm networks, in which the water-soluble PAA chains behave as the hydrophiphilic tunnels and allow water molecules to go through and, thus, to accelerate the diffusion of water molecules.
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Affiliation(s)
- Rentong Yu
- a Department of Polymer Science and Engineering and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
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27
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The role of poly(acrylic acid) in conventional glass polyalkenoate cements. JOURNAL OF POLYMER ENGINEERING 2016. [DOI: 10.1515/polyeng-2015-0079] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Abstract
Glass polyalkenoate cements (GPCs) have been used in dentistry for over 40 years. These novel bioactive materials are the result of a reaction between a finely ground glass (base) and a polymer (acid), usually poly(acrylic acid) (PAA), in the presence of water. This article reviews the types of PAA used as reagents (including how they vary by molar mass, molecular weight, concentration, polydispersity and content) and the way that they control the properties of the conventional GPCs (CGPCs) formulated from them. The article also considers the effect of PAA on the clinical performance of CGPCs, including biocompatibility, rheological and mechanical properties, adhesion, ion release, acid erosion and clinical durability. The review has critically evaluated the literature and clarified the role that the polyacid component of CGPCs plays in setting and maturation. This review will lead to an improved understanding of the chemistry and properties of the PAA phase which will lead to further innovation in the glass-based cements field.
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28
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Butruk-Raszeja BA, Trzaskowska PA, Kuźminska A, Ciach T. Polyurethane modification with acrylic acid by Ce(IV)-initiated graft polymerization. OPEN CHEM 2016. [DOI: 10.1515/chem-2016-0020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractThis paper presents a method for polyurethane surface functionalization for tissue engineering applications. Functionalization has been carried out by grafting acrylic acid to the polyurethane surface with the use of radical polymerization with a Ce4+ initiator. Contrary to other papers suggesting that the presence of hydroxyl groups are essential for successful grafting via ceric ions, we propose a method with the omission of the surface hydroxylation step. The influence of reaction conditions: reaction time, reaction temperature and monomer concentration on carboxyl groups surface density has been analyzed and described. The quantity of carboxyl groups on the surface was determined with the use of the TBO method. Materials grafted with acrylic acid have been subjected to conjugation with a peptide using sulfoNHS/ EDC chemistry. Successful incorporation of the peptide has been confirmed by an ELISA assay. Additionally, for better characterization, after each step of modification materials were subjected to SEM, FTIR-ATR, XPS and contact angle measurement analysis.
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Affiliation(s)
- Beata A. Butruk-Raszeja
- 1Laboratory of Biomedical Engineering, Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645 Warsaw, Poland
| | - Paulina A. Trzaskowska
- 1Laboratory of Biomedical Engineering, Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645 Warsaw, Poland
| | - Aleksandra Kuźminska
- 1Laboratory of Biomedical Engineering, Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645 Warsaw, Poland
| | - Tomasz Ciach
- 1Laboratory of Biomedical Engineering, Faculty of Chemical and Process Engineering, Warsaw University of Technology, Waryńskiego 1, 00-645 Warsaw, Poland
- 2CEZAMAT PW, Polna 50, 00-644 Warsaw, Poland
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29
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Kaabi Falahieh Asl S, Nemeth S, Tan MJ. Novel biodegradable calcium phosphate/polymer composite coating with adjustable mechanical properties formed by hydrothermal process for corrosion protection of magnesium substrate. J Biomed Mater Res B Appl Biomater 2015; 104:1643-1657. [PMID: 26340081 DOI: 10.1002/jbm.b.33505] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 07/31/2015] [Accepted: 08/03/2015] [Indexed: 11/08/2022]
Abstract
Ceramic type coatings on metallic implants, such as calcium phosphate (Ca-P), are generally stiff and brittle, potentially leading to the early failure of the bone-implant interface. To reduce material brittleness, polyacrylic acid and carboxymethyl cellulose were used in this study to deposit two types of novel Ca-P/polymer composite coatings on AZ31 magnesium alloy using a one-step hydrothermal process. X-ray diffraction and scanning electron microscopy showed that the deposited Ca-P crystal phase and morphology could be controlled by the type and concentration of polymer used. Incorporation of polymer in the Ca-P coatings reduced the coating elastic modulus bringing it close to that of magnesium and that of human bone. Nanoindentation test results revealed significantly decreased cracking tendency with the incorporation of polymer in the Ca-P coating. Apart from mechanical improvements, the protective composite layers had also enhanced the corrosion resistance of the substrate by a factor of 1000 which is sufficient for implant application. Cell proliferation studies indicated that the composite coatings induced better cell attachment compared with the purely inorganic Ca-P coating, confirming that the obtained composite materials could be promising candidates for surface protection of magnesium for implant application with the multiple functions of corrosion protection, interfacial stress reduction, and cell attachment/cell growth promotion. © 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1643-1657, 2016.
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Affiliation(s)
- Sara Kaabi Falahieh Asl
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, 639708, Singapore. .,Singapore Institute Of Manufacturing Technology, 638075, Singapore.
| | - Sandor Nemeth
- Singapore Institute Of Manufacturing Technology, 638075, Singapore
| | - Ming Jen Tan
- School of Mechanical & Aerospace Engineering, Nanyang Technological University, 639708, Singapore
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30
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Yan J, Zeng X, Ren T, van der Heide E. Exploring an alternative aqueous lubrication concept for biomedical applications: Hydration lubrication based on O/W emulsions combined with graphene oxide. BIOSURFACE AND BIOTRIBOLOGY 2015. [DOI: 10.1016/j.bsbt.2015.05.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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31
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Dumitru LM, Manoli K, Magliulo M, Sabbatini L, Palazzo G, Torsi L. Plain poly(acrylic acid) gated organic field-effect transistors on a flexible substrate. ACS APPLIED MATERIALS & INTERFACES 2013; 5:10819-10823. [PMID: 24144062 DOI: 10.1021/am403008b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report on the use of a polyanionic proton conductor, poly(acrylic acid), to gate a poly[2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene]-based organic field-effect transistor (OFET). A planar configuration of the OFET is evaluated, and the electrical performance and implementation on a flexible substrate are discussed.
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Affiliation(s)
- Liviu M Dumitru
- Department of Chemistry, "Aldo Moro" University , Via Orabona 4, Bari 70126, Italy
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32
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Deng Y, Xiong D, Wang K. Biotribological properties of UHMWPE grafted with AA under lubrication as artificial joint. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2013; 24:2085-2091. [PMID: 23793532 DOI: 10.1007/s10856-013-4970-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Accepted: 05/31/2013] [Indexed: 06/02/2023]
Abstract
Osteolysis caused by wear particles from polyethylene in the artificial hip joints is a serious issue. In order to endow the low friction and wear of the bearing surface of ultra-high molecular weight polyethylene (UHMWPE) artificial joint for a longer term, hydrophilic acrylic acid (AA) was grafted on UHMWPE powders with the method of ultraviolet irradiation and then the modified powders were hot pressed. The tribological properties of modified UHMWPE sliding against CoCrMo metallic plate on reciprocating tribometer under calf serum, saline and distilled water lubrication during a long-term friction were investigated. The measurement of Fourier-transform infrared spectroscopy indicates that AA is successfully grafted on the surface of UHMWPE powders by photo-induced graft polymerization. Contact angles of UHMWPE are decreased from 83° to 35° by grafting and the surface wettability is effectively improved. The tensile strength of modified sample decreases. The friction coefficient and wear rate of UHMWPE-g-PAA under calf serum, saline and distilled water lubrication are lower than that of untreated UHMWPE. With the increase of grafting ratio, the wear rate of UHMWPE-g-PAA decreases firstly and then increases. The modified UHMWPE with grafting ratio of 3.5 % has the lowest wear rate, which is just quarter of the untreated UHMWPE. The hydrated PAA polymer brushes enclosed in the UHMWPE bulk material provide continuous lubrication during long term sliding.
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Affiliation(s)
- Yaling Deng
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, 210094 Jiangsu, People's Republic of China
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33
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Wang X, Luo J, Yi C, Liu X. Paracetamol Sensor Based on Molecular Imprinting by Photosensitive Polymers. ELECTROANAL 2013. [DOI: 10.1002/elan.201300050] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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34
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AC electrophoretic deposition of organic–inorganic composite coatings. J Colloid Interface Sci 2013; 392:167-171. [DOI: 10.1016/j.jcis.2012.09.087] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2012] [Revised: 09/23/2012] [Accepted: 09/24/2012] [Indexed: 11/23/2022]
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35
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Cordero-Arias L, Cabanas-Polo S, Gao H, Gilabert J, Sanchez E, Roether JA, Schubert DW, Virtanen S, Boccaccini AR. Electrophoretic deposition of nanostructured-TiO2/chitosan composite coatings on stainless steel. RSC Adv 2013. [DOI: 10.1039/c3ra40535d] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
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36
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Hajdú A, Szekeres M, Tóth IY, Bauer RA, Mihály J, Zupkó I, Tombácz E. Enhanced stability of polyacrylate-coated magnetite nanoparticles in biorelevant media. Colloids Surf B Biointerfaces 2012; 94:242-9. [DOI: 10.1016/j.colsurfb.2012.01.042] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Revised: 01/23/2012] [Accepted: 01/27/2012] [Indexed: 10/14/2022]
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37
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Sandu T, Sârbu A, Constantin F, Vulpe S, Iovu H. Acrylic hydrogels-based biocomposites: Synthesis and characterization. J Appl Polym Sci 2012. [DOI: 10.1002/app.37992] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Cheruvathur AV, Langner EHG, Niemantsverdriet JWH, Thüne PC. In situ ATR-FTIR studies on MgCl2-diisobutyl phthalate interactions in thin film Ziegler-Natta catalysts. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:2643-51. [PMID: 22216939 DOI: 10.1021/la203972k] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
To study the surface structure of MgCl(2) support and its interaction with other active components in Ziegler-Natta catalyst, such as electron donors, we prepared a thin film analogue for Ziegler-Natta ethylene polymerization catalyst support by spin-coating a solution of MgCl(2) in ethanol, optionally containing a diester internal donor (diisobutyl-ortho-phthalate, DIBP) on a flat Si crystal surface. The donor content of these films was quantified by applying attenuated total internal reflection-Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray photoelectron spectroscopy (XPS). Changes in the interaction of DIBP with MgCl(2) at various temperatures were monitored by in situ ATR-FTIR. Upon increasing the temperature, a shift in the (C═O) band toward lower wavenumbers was observed together with the depletion of (O-H) stretching band due to the desorption of residual ethanol. We assign this shift to gradual redistribution of adsorbed DIBP from adsorption sites on the MgCl(2) (104) surface toward the more acidic MgCl(2) (110) surface. The morphologies of MgCl(2) and MgCl(2)/DIBP films were studied by transmission electron microscopy (TEM) revealing a preferential orientation of ClMgCl layers (001) parallel to the lateral film dimensions. This orientation becomes more pronounced upon annealing. In the absence of donor, the MgCl(2) grow in to large crystals aligned in large domains upon annealing. Both crystal growth and alignment is impeded by the presence of donor.
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Affiliation(s)
- Ajin V Cheruvathur
- Schuit Institute of Catalysis, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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Wang Y, Deen I, Zhitomirsky I. Electrophoretic deposition of polyacrylic acid and composite films containing nanotubes and oxide particles. J Colloid Interface Sci 2011; 362:367-74. [DOI: 10.1016/j.jcis.2011.07.007] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2011] [Revised: 06/11/2011] [Accepted: 07/04/2011] [Indexed: 12/01/2022]
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Borozenko O, Godin R, Lau KL, Mah W, Cosa G, Skene WG, Giasson S. Monitoring in Real-Time the Degrafting of Covalently Attached Fluorescent Polymer Brushes Grafted to Silica Substrates—Effects of pH and Salt. Macromolecules 2011. [DOI: 10.1021/ma2013755] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Olga Borozenko
- Department of Chemistry Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
| | - Robert Godin
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada, H3A 2K6
| | - Kai Lin Lau
- Department of Chemistry Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada, H3A 2K6
| | - Wayne Mah
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada, H3A 2K6
| | - Gonzalo Cosa
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, QC, Canada, H3A 2K6
| | - W. G. Skene
- Department of Chemistry Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
| | - Suzanne Giasson
- Department of Chemistry Université de Montréal, C.P. 6128, succursale Centre-Ville, Montréal, QC, Canada, H3C 3J7
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De Giglio E, Cafagna D, Giangregorio MM, Domingos M, Mattioli-Belmonte M, Cometa S. PHEMA-based thin hydrogel films for biomedical applications. J BIOACT COMPAT POL 2011. [DOI: 10.1177/0883911511410460] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Poly(2-hydroxyethyl methacrylate) based thin coatings were electro-synthesized by cyclic voltammetry on Au-coated quartz crystal surfaces to study different solid—liquid interfacial processes. By varying the electrochemical parameters and the presence or not of a crosslinking agent, films were obtained with thicknesses ranging from 5 to 90 nm. Surface characterization was performed by X-ray photoelectron spectroscopy, atomic force microscopy, and static contact angle measurements. Using quartz crystal microbalance with dissipation monitoring to investigate the relationship between the film thickness and the swelling behavior, it was found that these characteristics can be modulated by varying either the number of voltammetric cycles or the presence of the crosslinker. Cell adhesion and biocompatibility tests indicate that these film coatings were suitable for biomedical applications.
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Affiliation(s)
- E. De Giglio
- Department of Chemistry, University of Bari 'Aldo Moro', Bari, Italy
| | - D. Cafagna
- Department of Chemistry, University of Bari 'Aldo Moro', Bari, Italy
| | - MM Giangregorio
- Department of Chemistry, University of Bari 'Aldo Moro' , Bari, Italy
| | - M. Domingos
- Centre for Rapid and Sustainable Product Development, Polytechnic Institute of Leiria (IPL), Leiria, Portugal
| | - M. Mattioli-Belmonte
- Department of Molecular Pathology and Innovative Therapies, Universitá Politecnica delle Marche, Ancona, Italy
| | - S. Cometa
- Laboratory of Bioactive Polymeric Materials for Biomedical & Environmental Applications, Department of Chemistry and Industrial Chemistry, University of Pisa, Pisa, Italy,
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Amici J, Sangermano M, Celasco E, Yagci Y. Photochemical synthesis of gold–polyethylenglycol core–shell nanoparticles. Eur Polym J 2011. [DOI: 10.1016/j.eurpolymj.2011.03.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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43
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De Giglio E, Cometa S, Ricci M, Cafagna D, Savino A, Sabbatini L, Orciani M, Ceci E, Novello L, Tantillo G, Mattioli-Belmonte M. Ciprofloxacin-modified electrosynthesized hydrogel coatings to prevent titanium-implant-associated infections. Acta Biomater 2011; 7:882-91. [PMID: 20659594 DOI: 10.1016/j.actbio.2010.07.030] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2010] [Revised: 07/12/2010] [Accepted: 07/16/2010] [Indexed: 11/27/2022]
Abstract
New promising and versatile materials for the development of in situ sustained release systems consisting of thin films of either poly(2-hydroxyethyl methacrylate) or a copolymer based on poly(ethylene-glycol diacrylate) and acrylic acid were investigated. These polymers were electrosynthesized directly on titanium substrates and loaded with ciprofloxacin (CIP) either during or after the synthesis step. X-ray photoelectron spectroscopy was used to check the CIP entrapment efficiency as well as its surface availability in the hydrogel films, while high-performance liquid chromatography was employed to assess the release property of the films and to quantify the amount of CIP released by the coatings. These systems were then tested to evaluate the in vitro inhibition of methicillin-resistant Staphylococcus aureus (MRSA) growth. Moreover, a model equation is proposed which can easily correlate the diameter of the inhibition haloes with the amount of antibiotic released. Finally, MG63 human osteoblast-like cells were employed to assess the biocompatibility of CIP-modified hydrogel coatings.
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Lue SJ, Chen CH, Shih CM. Tuning of Lower Critical Solution Temperature (LCST) of Poly(N-Isopropylacrylamide-co-Acrylic acid) Hydrogels. J MACROMOL SCI B 2011. [DOI: 10.1080/00222341003784550] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Shingjiang Jessie Lue
- a Department of Chemical and Materials Engineering , Chang Gung University , Kwei-shan, Taoyuan, Taiwan
| | - Chi-Hwa Chen
- a Department of Chemical and Materials Engineering , Chang Gung University , Kwei-shan, Taoyuan, Taiwan
| | - Chao-Ming Shih
- a Department of Chemical and Materials Engineering , Chang Gung University , Kwei-shan, Taoyuan, Taiwan
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Amici J, Celasco E, Allia P, Tiberto P, Sangermano M. Poly(ethylene glycol)-Coated Magnetite Nanoparticles: Preparation and Characterization. MACROMOL CHEM PHYS 2011. [DOI: 10.1002/macp.201000707] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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46
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Hydrogel Synthesis Directed Toward Tissue Engineering: Impact of Reaction Condition on Structural Parameters and Macroscopic Properties of Xerogels. INT J POLYM SCI 2011. [DOI: 10.1155/2011/343062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The existence of correlation and functional relationships between reaction conditions (concentrations of crosslinker, monomer and initiator, and neutralization degree of monomer), primary structural parameters (crosslinking density of network, average molar mass between crosslinks, and distance between macromolecular chains), and macroscopic properties (equilibrium swelling degree and xerogel density) of the synthesized xerogels which are important for application in tissue engineering is investigated. The structurally different xerogels samples of poly(acrylic acid), poly(methacrylic acid), and poly(acrylic acid-g-gelatin) were synthesized by applying different methods of polymerization: crosslinking polymerization, crosslinking polymerization in high concentrated aqueous solution, and crosslinking graft polymerization. The values of primary structural parameters and macroscopic properties were determined for the synthesized xerogels samples. For all of the investigated methods of polymerization, an existence of empirical power function of the dependence of primary structural parameters and macroscopic properties on the reaction conditions was established. The scaling laws between primary structural parameters and macroscopic properties on average molar mass between crosslinks were established. It is shown that scaling exponent is independent from the type of monomer and other reaction conditions within the same polymerization method. The physicochemical model that could be used for xerogel synthesis with predetermined macroscopic properties was suggested.
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47
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Borozenko O, Skene W, Giasson S. Direct Polymerization of Polyacrylic Acid on Mica Substrates using ATRP - A Preliminary Study. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/masy.200900056] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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48
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Lego B, Skene W, Giasson S. Neutral and Charged Brushes Covalently Grafted from OH-Functionalized Mica Surfaces using Surface-Initiated ATRP - Swelling Investigation by AFM. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/masy.200900063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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49
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Shi K, Lei Y, Wang S, Shiu KK. Electrochemically Induced Free-Radical Polymerization for the Fabrication of Amperometric Glucose Biosensors. ELECTROANAL 2010. [DOI: 10.1002/elan.201000165] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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50
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Moskowitz JS, Blaisse MR, Samuel RE, Hsu HP, Harris MB, Martin SD, Lee JC, Spector M, Hammond PT. The effectiveness of the controlled release of gentamicin from polyelectrolyte multilayers in the treatment of Staphylococcus aureus infection in a rabbit bone model. Biomaterials 2010; 31:6019-30. [PMID: 20488534 DOI: 10.1016/j.biomaterials.2010.04.011] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Accepted: 04/05/2010] [Indexed: 11/17/2022]
Abstract
While the infection rate of orthopedic implants is low, the required treatment, which can involve six weeks of antibiotic therapy and two additional surgical operations, is life threatening and expensive, and thus motivates the development of a one-stage re-implantation procedure. Polyelectrolyte multilayers incorporating gentamicin were fabricated using the layer-by-layer deposition process for use as a device coating to address an existing bone infection in a direct implant exchange operation. The films eluted about 70% of their payload in vitro during the first three days and subsequently continued to release drug for more than four additional weeks, reaching a total average release of over 550 microg/cm(2). The coatings were demonstrated to be bactericidal against Staphylococcus aureus, and degradation products were generally nontoxic towards MC3T3-E1 murine preosteoblasts. Film-coated titanium implants were compared to uncoated implants in an in vivo S. aureus bone infection model. After a direct exchange procedure, the antimicrobial-coated devices yielded bone homogenates with a significantly lower degree of infection than uncoated devices at both day four (p < 0.004) and day seven (p < 0.03). This study has demonstrated that a self-assembled ultrathin film coating is capable of effectively treating an experimental bone infection in vivo and lays the foundation for development of a multi-therapeutic film for optimized, synergistic treatment of pain, infection, and osteomyelitis.
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Affiliation(s)
- Joshua S Moskowitz
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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