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Sarikaya R, Song L, Ye Q, Misra A, Tamerler C, Spencer P. Evolution of Network Structure and Mechanical Properties in Autonomous-Strengthening Dental Adhesive. Polymers (Basel) 2020; 12:polym12092076. [PMID: 32932724 PMCID: PMC7570171 DOI: 10.3390/polym12092076] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/03/2020] [Accepted: 09/10/2020] [Indexed: 11/16/2022] Open
Abstract
The inherent degradation property of most dental resins in the mouth leads to the long-term release of degradation by-products at the adhesive/tooth interface. The by-products increase the virulence of cariogenic bacteria, provoking a degradative positive-feedback loop that leads to physicochemical and mechanical failure. Photoinduced free-radical polymerization and sol‒gel reactions have been coupled to produce a novel autonomous-strengthening adhesive with enhanced hydrolytic stability. This paper investigates the effect of network structure on time-dependent mechanical properties in adhesives with and without autonomous strengthening. Stress relaxation was conducted under 0.2% strain for 8 h followed by 40 h recovery in water. The stress‒time relationship is analyzed by nonlinear least-squares data-fitting. The fitted Prony series predicts the sample’s history under monotonic loading. Results showed that the control failed after the first loading‒unloading‒recovery cycle with permanent deformation. While for the experimental sample, the displacement was almost completely recovered and the Young’s modulus increased significantly after the first test cycle. The experimental polymer exhibited higher degree of conversion, lower leachate, and time-dependent stiffening characteristics. The autonomous-strengthening reaction persists in the aqueous environment leading to a network with enhanced resistance to deformation. The results illustrate a rational approach for tuning the viscoelasticity of durable dental adhesives.
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Affiliation(s)
- Rizacan Sarikaya
- Institute for Bioengineering Research, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; (R.S.); (L.S.); (A.M.); (C.T.)
- Department of Mechanical Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Linyong Song
- Institute for Bioengineering Research, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; (R.S.); (L.S.); (A.M.); (C.T.)
| | - Qiang Ye
- Institute for Bioengineering Research, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; (R.S.); (L.S.); (A.M.); (C.T.)
- Correspondence: (Q.Y.); (P.S.); Tel.: +1-785-864-1746 (Q.Y.); +1-785-864-8140 (P.S.); Fax: +1-785-864-1742 (Q.Y.); +1-785-864-1742 (P.S.)
| | - Anil Misra
- Institute for Bioengineering Research, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; (R.S.); (L.S.); (A.M.); (C.T.)
- Department of Civil Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Candan Tamerler
- Institute for Bioengineering Research, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; (R.S.); (L.S.); (A.M.); (C.T.)
- Department of Mechanical Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
- Bioengineering Program, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
| | - Paulette Spencer
- Institute for Bioengineering Research, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA; (R.S.); (L.S.); (A.M.); (C.T.)
- Department of Mechanical Engineering, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
- Bioengineering Program, University of Kansas, 1530 W. 15th Street, Lawrence, KS 66045-7609, USA
- Correspondence: (Q.Y.); (P.S.); Tel.: +1-785-864-1746 (Q.Y.); +1-785-864-8140 (P.S.); Fax: +1-785-864-1742 (Q.Y.); +1-785-864-1742 (P.S.)
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2
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Zhou D, Dong Q, Liang K, Xu W, Zhou Y, Xiao P. Photocrosslinked methacrylated poly(vinyl alcohol)/hydroxyapatite nanocomposite hydrogels with enhanced mechanical strength and cell adhesion. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29263] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ding Zhou
- Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education Wuhan Textile University Wuhan 430073 People's Republic of China
| | - Qi Dong
- Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education Wuhan Textile University Wuhan 430073 People's Republic of China
| | - Kaili Liang
- Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education Wuhan Textile University Wuhan 430073 People's Republic of China
| | - Weilin Xu
- Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education Wuhan Textile University Wuhan 430073 People's Republic of China
| | - Yingshan Zhou
- Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education Wuhan Textile University Wuhan 430073 People's Republic of China
- College of Materials Science and Engineering Wuhan Textile University Wuhan 430073 People's Republic of China
| | - Pu Xiao
- Research School of Chemistry Australian National University Canberra ACT 2601 Australia
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3
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Wood TJ, Ward LJ, Badyal JPS. Super-adhesive polymer-silica nanocomposite layers. ACS APPLIED MATERIALS & INTERFACES 2013; 5:9678-9683. [PMID: 24079883 DOI: 10.1021/am402731x] [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
Atomized spray plasma deposition (ASPD) using a precursor mixture of 2-hydroxyethyl methacrylate and methacryloyl-functionalized 15 nm silica nanoparticles leads to the formation of poly(2-hydroxyethyl methacrylate)-silica nanocomposite layers. The direct application of these coatings to overlapping glass-glass joints gives rise to excellent in situ adhesion reaching 84 MPa shear bond strength and 6 GPa shear modulus prior to the onset of adherent (bulk glass) failure. This significant enhancement in interfacial adhesion arises due to the silica nanoparticle surface methacryloyl groups enhancing cross-linking throughout the nanocomposite layer.
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Affiliation(s)
- T J Wood
- Department of Chemistry Science Laboratories, Durham University , Durham DH1 3LE, United Kingdom
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Zhang J, Bi R, Hodge W, Yin P, Tse WH. A nanocomposite contact lens for the delivery of hydrophilic protein drugs. J Mater Chem B 2013; 1:4388-4395. [PMID: 32261112 DOI: 10.1039/c3tb20391c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
To improve the efficiency of topical ocular drug administration, we developed a nanocomposite contact lens to deliver hydrophilic protein drugs over a prolonged period of time. Here, an in situ route was used to encapsulate the hydrophilic protein drug bovine serum albumin (BSA) within gelatin nanoparticles (NPs), 180 ± 20 nm in diameter, which were then grafted onto the lens material, a copolymer of 2-hydroxyethyl methacrylate and 2-aminoethyl methacrylate p(HEMA-co-AEMA), through photopolymerization. The thickness of the nanocomposite lens was controlled at 150 μm. The release kinetics of BSA from plain p(HEMA-co-AEMA), gelatin NPs, and gelatin NP-grafted p(HEMA-co-AEMA) in phosphate buffer saline (PBS) at pH = 7.4 were studied. The release profile of BSA encapsulated within gelatin NPs could be monitored for 7 days, three times longer than that of BSA soaked in p(HEMA-co-AEMA). Our findings indicate that use of the nanocomposite contact lens, i.e. BSA-loaded gelatin NPs incorporated into p(HEMA-co-AMEA), can prolong the release profile of BSA to 12 days. The swelling behavior and interior strain of p(HEMA-co-AEMA) with and without grafted NPs (1000 : 1 w/w) were further investigated. The nanocomposite lens shows higher swelling behavior than the plain p(HEMA-co-AEMA) lens does. The addition of gelatin NPs to hydrogels leads to a relatively uniform interior strain with lower stiffness. Thus, the prolonged release might be due to a combination of effects. Internal diffusion of the nanocomposite lens materials may significantly contribute to the prolonged release of protein drugs. Furthermore, the nanocomposite lens materials had no cytotoxicity. This new biocompatible nanocomposite might be further developed as an alternative tool for continuous topical ocular drug delivery over a prolonged period of time.
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Affiliation(s)
- Jin Zhang
- Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Ontario N6A 5B7, Canada.
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5
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Chemin N, Rozes L, Chanéac C, Cassaignon S, Le Bourhis E, Jolivet JP, Barthel E, Sanchez C. Influence of Structure and Organic-Inorganic Phase Interactions on Coating Mechanical Properties in the Ternary Goethite:Poly(HEMA):Silica System. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101290] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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6
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Yin HE, Huang FH, Chiu WY. Hydrophobic and flexible conductive films consisting of PEDOT:PSS-PBA/fluorine-modified silica and their performance in weather stability. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm31352a] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Lee CK, Hwang FH, Chen CC, Chang CL, Cheng LP. Preparation and characterization of nanosilica-filled color resist. ADVANCES IN POLYMER TECHNOLOGY 2011. [DOI: 10.1002/adv.20247] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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8
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Wadee A, Pillay V, Choonara YE, du Toit LC, Penny C, Ndesendo VMK, Kumar P, Murphy CS. Recent advances in the design of drug-loaded polymeric implants for the treatment of solid tumors. Expert Opin Drug Deliv 2011; 8:1323-40. [DOI: 10.1517/17425247.2011.602671] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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9
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10
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Bayramoğlu G, Kayaman-Apohan N, Akçakaya H, Vezir Kahraman M, Erdem Kuruca S, Güngör A. Preparation of collagen modified photopolymers: a new type of biodegradable gel for cell growth. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:761-775. [PMID: 19936889 DOI: 10.1007/s10856-009-3929-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Accepted: 10/30/2009] [Indexed: 05/28/2023]
Abstract
In this study a new branched methacrylated poly(propylene glycol-co-lactic acid) (PPG-PLA-IEM) and methacrylated cellulose acetate butyrate resin (CAB-IEM) were synthesized. Hydrogels with various amounts of PPG-PLA-IEM and CAB-IEM (25, 50 and 75 wt% IEM modified) were prepared by photopolymerization. Collagen tethered PEG-monoacrylate (PEGMA-collagen) was prepared and introduced as a bioactive moiety to modify the hydrogel in order to enhance cell affinity. In vitro attachment and growth of 3T3 mouse fibroblasts and human umbilical vein endothelial cells (HUVEC) on the hydrogels with and without collagen were also investigated. It was observed that, the collagen improves the cell adhesion onto the hydrogel surface. With the increasing amount of collagen, cell viability increased by 28% for ECV304 (P < 0.05) and 30% for 3T3 (P < 0.05).
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Affiliation(s)
- Gülay Bayramoğlu
- Faculty of Engineering, Department of Polymer Engineering, Yalova University, 77100 Yalova, Turkey
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11
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Lluch AV, Fernández AC, Ferrer GG, Pradas MM. Bioactive scaffolds mimicking natural dentin structure. J Biomed Mater Res B Appl Biomater 2009; 90:182-94. [PMID: 19072987 DOI: 10.1002/jbm.b.31272] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Organic scaffolds of poly(ethyl methacrylate-co-hydroxyethyl acrylate) [P(EMA-co-HEA)] 70/30 wt % ratio, with varying proportions of silica SiO(2) from 0 to 20 wt % and aligned tubular pores, were prepared using a fiber-templating fabrication method, with the aim of mimicking structure and properties of the mineralized tissue of natural dentin. Precursors of the copolymer and silica were simultaneously polymerized in a sol-gel process within the fiber template, which was eventually eliminated to generate homogeneously distributed parallel micrometer-sized pores in the material. Scaffolds of PEMA and PHEA were obtained by the same approach. The scaffolds were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy, and thermogravimetric analysis. The specific volume was determined by Archimedes' method and the porosity calculated from the geometry. The mechanical properties were analyzed in tensile and compressive modes. The bioactivity of the scaffolds with 15 wt % SiO(2) was tested by immersion in simulated body fluid (SBF) for 7 days followed by immersion in 2x SBF for 7 days. These scaffolds were afterwards characterized by SEM, energy dispersive spectroscopy, and compression assays. Percentages of silica above 10 wt % reinforced mechanically the copolymer, evidenced by the hindrance of the long range motions of the organic chains, altered shrinkage and swelling, and meanwhile conferred bioactivity to its surface. These tubular porous structures, which resemble natural dentin with regard to its structure and properties and induce the precipitation of apatite on their surfaces in vitro, are expected to facilitate the integration in the host mineralized tissue, to stimulate cell growth and to be useful as guiding scaffolds for in vivo dentin regeneration.
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Affiliation(s)
- A Vallés Lluch
- Center for Biomaterials and Tissue Engineering, Universidad Politécnica de Valencia, 46022 Valencia, Spain.
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12
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Karataş S, Hoşgör Z, Apohan NK, Güngör A. Preparation and characterization of photopolymerizable organic–inorganic hybrid materials by the sol-gel method. JOURNAL OF POLYMER RESEARCH 2009. [DOI: 10.1007/s10965-009-9311-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Vallés Lluch A, Gallego Ferrer G, Monleón Pradas M. Biomimetic apatite coating on P(EMA-co-HEA)/SiO2 hybrid nanocomposites. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.04.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Microstructure and properties of silane monomer-modified styrene-acrylate nanocoatings. Polym Bull (Berl) 2009. [DOI: 10.1007/s00289-009-0060-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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15
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Maziad NA, Abd El-Aal SE, El-Kelesh NA. Equilibrium adsorption isotherm and controlled release of antibiotic drug chloroamphenicol from poly(2-vinyl pyridine/acrylic acid) hydrogels prepared by gamma radiation. J Appl Polym Sci 2009. [DOI: 10.1002/app.28939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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16
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Silvestri B, Luciani G, Costantini A, Tescione F, Branda F, Pezzella A. In‐situ
sol‐gel synthesis and characterization of bioactive pHEMA/SiO
2
blend hybrids. J Biomed Mater Res B Appl Biomater 2008; 89:369-378. [DOI: 10.1002/jbm.b.31225] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- B. Silvestri
- Interdisciplinary Centre of Biomedical Materials (CRIB), Università di Napoli Federico II, Naples 80‐80125, Italy
| | - G. Luciani
- Dipartimento di Ingegneria dei Materiali e della Produzione, Università di Napoli Federico II, Naples 80‐80125, Italy
| | - A. Costantini
- Dipartimento di Ingegneria dei Materiali e della Produzione, Università di Napoli Federico II, Naples 80‐80125, Italy
| | - F. Tescione
- Dipartimento di Ingegneria dei Materiali e della Produzione, Università di Napoli Federico II, Naples 80‐80125, Italy
| | - F. Branda
- Dipartimento di Ingegneria dei Materiali e della Produzione, Università di Napoli Federico II, Naples 80‐80125, Italy
| | - A. Pezzella
- Dipartimento di Chimica Organica e Biochimica, Università di Napoli Federico II, Naples 4‐80126, Italy
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17
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Liu YY, Liu TY, Chen SY, Liu DM. Synthesis and characterization of nanoporous SiO(2)/pHEMA biocomposites. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:2903-2911. [PMID: 18347955 DOI: 10.1007/s10856-007-3355-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2007] [Accepted: 12/28/2007] [Indexed: 05/26/2023]
Abstract
Porous SiO(2)/pHEMA biocomposites were synthesized in situ by incorporating silica nanoparticles with a hydroxyethyl methacrylate (HEMA) monomer, following a UV-induced photopolymerization. The nanostructure of the composites was characterized and the resulting physical properties were examined. The release kinetics of the model molecule-vitamin B12-and the hemocompatibility of the porous SiO(2)/pHEMA composites were investigated. Heterogeneous reaction kinetics is proposed to be the formation mechanism of the nanoporosity in the pHEMA matrix as a result of incorporating silica nanoparticles following photopolymerization. Experimental results also demonstrated that the incorporation of the silica nanoparticles into the pHEMA matrix not only enhanced the mechanical property but also maintained a good hemocompatibility of the resulting biocomposites. In addition, it was observed that the drug release profile of the composites (in the form of a membrane) can be precisely regulated from a two-stage pattern to one-stage pattern by varying the concentration of both the SiO(2) nanoparticles and HEMA monomer during synthesis. The permeability of the model drug was enhanced by two orders of magnitude from 4.22 x 10(-7 )cm(2)/h to 3.92 x 10(-5 )cm(2)/h by controlling the micro-to-nanostructure of the composites. The platelet adhesion experiment demonstrated low aggregation of the platelets on the surface of the biocomposite membranes, indicating a promising antithrombotic property.
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Affiliation(s)
- Yen-Yu Liu
- Department of Materials Science and Engineering, National Chiao-Tung University, 1001 Ta-Hsueh Rd, Hsinchu, Taiwan 30010, Republic of China
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18
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Costantini A, Luciani G, Silvestri B, Tescione F, Branda F. Bioactive poly(2-hydroxyethylmethacrylate)/silica gel hybrid nanocomposites prepared by sol-gel process. J Biomed Mater Res B Appl Biomater 2008; 86:98-104. [DOI: 10.1002/jbm.b.30993] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Rodríguez Hernández JC, Serrano Aroca A, Gómez Ribelles JL, Pradas MM. Three-dimensional nanocomposite scaffolds with ordered cylindrical orthogonal pores. J Biomed Mater Res B Appl Biomater 2008; 84:541-9. [PMID: 17618511 DOI: 10.1002/jbm.b.30902] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A silica reinforcement can improve the mechanical properties of hydrogels in the rubbery state. A method to prepare a scaffold with a well-ordered array of cylindrical pores is presented in this work, which yields a scaffold with a biphasic matrix of a hybrid nanocomposite: the hydrogel poly(2-hydroxyethyl acrylate) (PHEA) and a silica network obtained by an acid catalyzed sol-gel process of tetraethoxysilane (TEOS). As porogenic template of the scaffold stacked layers of commercial polyamide 6 fabrics were used, which were compressed and sintered. Porosity and dynamic mechanical response of the resulting scaffolds were measured and compared with the bulk properties. Removal of the organic polymer phase of the scaffold by pyrolysis revealed the overall continuity of the silica network; the residue maintained the original cylindrical pore structure of the scaffolds, though slightly shrunk. Atomic force microscopy topography measurements of these pyrolysed residues revealed a silica structure with particle aggregates having sizes around tens of nanometers. The silica distribution was assessed by X-ray microanalysis mapping, showing homogeneity at a micrometer scale.
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20
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Liu X, Zhao S. Measurement of the condensation temperature of nanosilica powder organically modified by a silane coupling agent and its effect evaluation. J Appl Polym Sci 2008. [DOI: 10.1002/app.27907] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Li S, Shah A, Hsieh AJ, Haghighat R, Praveen SS, Mukherjee I, Wei E, Zhang Z, Wei Y. Characterization of poly(2-hydroxyethyl methacrylate-silica) hybrid materials with different silica contents. POLYMER 2007. [DOI: 10.1016/j.polymer.2007.05.025] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Dynamics of blood proteins adsorption onto poly (2-hydroxyethyl methacrylate)-silica nanocomposites: Correlation with biocompatibility. J Appl Polym Sci 2007. [DOI: 10.1002/app.25654] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Lin DJ, Don TM, Chen CC, Lin BY, Lee CK, Cheng LP. Preparation of a nanosilica-modified negative-type acrylate photoresist. J Appl Polym Sci 2007. [DOI: 10.1002/app.27151] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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25
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Costantini A, Luciani G, Annunziata G, Silvestri B, Branda F. Swelling properties and bioactivity of silica gel/pHEMA nanocomposites. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2006; 17:319-25. [PMID: 16617410 DOI: 10.1007/s10856-006-8230-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2004] [Accepted: 08/18/2005] [Indexed: 05/08/2023]
Abstract
A novel hydrogel based on 2-hydroxyethyl- methacrilate and SiO(2) nanoparticles was prepared. The filler was added at a concentration of 30% w/w of silica nanoparticles to the mass of polymer. The composite material was characterised as far as concerns swelling behaviour in comparison to pHEMA. Swelling ratio of modified pHEMA was higher. Bioactivity of both SiO(2) nanoparticles and the modified hydrogel was evaluated by soaking samples into a simulated body fluid (SBF). FT-IR spectroscopy, scanning electron microscopy (SEM) and energy dispersive system (EDS) results suggest silica nanoparticles keep bioactive in the polymer. SiO(2) filler in a p(HEMA) matrix makes the composite bioactive. Therefore, these composites can be used to make bioactive scaffold for bone engineering.
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Affiliation(s)
- A Costantini
- Dipartimento di Ingegneria dei Materiali e della Produzione, Universitá di Napoli Federico II, Piazzale Tecchio, 80-80125 Napoli, Italy.
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26
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Karataş S, Hoşgör Z, Menceloğlu Y, Kayaman-Apohan N, Güngör A. Synthesis and characterization of flame retarding UV-curable organic–inorganic hybrid coatings. J Appl Polym Sci 2006. [DOI: 10.1002/app.24274] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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27
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Densmore CG, Robison TW, Smith BF, Lewis RE. Controlled release and absorption of cetylpyridinium chloride using polymer hydrogels. J Appl Polym Sci 2006. [DOI: 10.1002/app.23210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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28
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Pereira MM, Jones JR, Orefice RL, Hench LL. Preparation of bioactive glass-polyvinyl alcohol hybrid foams by the sol-gel method. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2005; 16:1045-50. [PMID: 16388385 DOI: 10.1007/s10856-005-4758-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2004] [Accepted: 03/11/2005] [Indexed: 05/06/2023]
Abstract
A new class of materials based on inorganic and organic species combined at a nanoscale level has received large attention recently. In this work the idea of producing hybrid materials with controllable properties is applied to obtain foams to be used as scaffolds for tissue engineering. Hybrids were synthesized by reacting poly(vinyl alcohol) in acidic solution with tetraethylorthosilicate. The inorganic phase was also modified by incorporating a calcium compound. Hydrated calcium chloride was used as precursor. A surfactant was added and a foam was produced by vigorous agitation, which was cast just before the gel point. Hydrofluoric acid solution was added in order to catalyze the gelation. The foamed hybrids were aged at 40 degrees C and vacuum dried at 40 degrees C. The hybrid foams were analyzed by Scanning Electron Microscopy, Mercury Porosimetry, Nitrogen Adsorption, X-ray Diffraction and Infra-red Spectroscopy. The mechanical behavior was evaluated by compression tests. The foams obtained had a high porosity varying from 60 to 90% and the macropore diameter ranged from 30 to 500 microm. The modal macropore diameter varied with the inorganic phase composition and with the polymer content in the hybrid. The surface area and mesopore volume decreased as polymer concentration increased in the hybrids. The strain at fracture of the hybrid foams was substantially greater than pure gel-glass foams.
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Affiliation(s)
- M M Pereira
- Department of Materials, Imperial College London, UK.
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29
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Costa ROR, Pereira MM, Lameiras FS, Vasconcelos WL. Apatite formation on poly(2-hydroxyethyl methacrylate)-silica hybrids prepared by sol-gel process. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2005; 16:927-32. [PMID: 16167101 DOI: 10.1007/s10856-005-4427-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2004] [Accepted: 11/18/2004] [Indexed: 05/04/2023]
Abstract
Hybrids of poly(2-hydroxyethyl methacrylate) (PHEMA), a polymer that has been employed in a wide variety of biomedical applications, and silica-gel, which exhibits a well-known bioactivity, were produced. The obtained hybrids were characterized and their in vitro ability to induce the formation of a calcium phosphate layer on the surface was evaluated. The surface area of hybrids decreased with increasing amounts of PHEMA so that hybrids with more than approximately 40% PHEMA are virtually non-porous. All hybrids induced the formation of a calcium phosphate layer on their surfaces when soaked into simulated body fluid. The induction time and the morphology of the apatite layer varied according to the polymer content.
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Affiliation(s)
- Ricardo O R Costa
- Centro de Desenvolvimento da Tecnologia Nuclear, CDTN/CNEN, Rua Prof. Mário Werneck, Campus da UFMG, Belo Horizonte, MG, Brazil, 30123-970
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Structural characteristics and properties of silica/poly(2-hydroxyethyl methacrylate) (PHEMA) nanocomposites prepared by mixing colloidal silica or tetraethyloxysilane (TEOS) with PHEMA. POLYMER 2005. [DOI: 10.1016/j.polymer.2004.12.052] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Huang SL, Chin WK, Yang WP. Viscosity, particle size distribution, and structural investigation of tetramethyloxysilane/2-hydroxyethyl methacrylate sols during the sol-gel process with acid and base catalysts. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/polb.20224] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Lin DJ, Chen CC, Su YC, Huang SH, Cheng LP. Preparation of silica-filled poly(2-hydroxymethyl methacrylate) nanocomposites cured by photoirradiation during the sol-gel process. J Appl Polym Sci 2004. [DOI: 10.1002/app.21097] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Hajji P, David L, Gerard JF, Pascault JP, Vigier G. Synthesis, structure, and morphology of polymer-silica hybrid nanocomposites based on hydroxyethyl methacrylate. ACTA ACUST UNITED AC 1999. [DOI: 10.1002/(sici)1099-0488(19991115)37:22<3172::aid-polb2>3.0.co;2-r] [Citation(s) in RCA: 278] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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