Hybrid silicate nanofillers: Impact on morphology and performance of EVA copolymer upon in vitro physiological fluid exposure |
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Authors: | Azlin Fazlina Osman Asna Rasyidah Abdul Hamid Md Rakibuddin Goh Khung Weng Rajakumar Ananthakrishnan Supri A Ghani Zaleha Mustafa |
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Affiliation: | 1. Center of Excellence Geopolymer and Green Technology (CEGeoGTech), School of Materials Engineering, Universiti Malaysia Perlis, Arau, Perlis, Malaysia;2. Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur, India;3. Faculty of Engineering Technology, Universiti Malaysia Perlis, Kampus UniCITI, S. Chuchuh, Padang Besar, Perlis, Malaysia;4. Advanced Manufacturing Centre, Faculty of Manufacturing Engineering, Universiti Teknikal Malaysia Melaka, Hang Tuah Jaya, Durian Tunggal, Melaka, Malaysia |
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Abstract: | Ethyl vinyl acetate (EVA) copolymers are recyclable plastics with exceptional biocompatibility, thus they are potent candidate materials for biomedical applications. In this study, improvement in the EVA biostability was aimed by the incorporation of hybrid nanofillers. EVA copolymer incorporating 3 wt % organically modified montmorillonite/bentonite (OMMT/Bent) hybrid nanofillers in different ratios (3:0, 2.75:0.25, 2.5:0.5, 2.25:0.75, 2:1 and 0:3 in wt %) were prepared by melt compounding process and then analyzed for their biostability upon in vitro physiological fluid exposure. Results indicated that the addition of OMMT2.75/Bent0.25 hybrid nanofillers can reduce the degradation of the EVA copolymer under physiological fluid environment through hydrophilic bentonite–vinyl acetate interactions. The obtained nanocomposite material achieved the best retention in tensile and thermal properties upon 4 weeks exposure in the in vitro physiological fluid. The findings indicate the potential of using the hybrid OMMT/Bent nanofillers for biostability enhancement of the EVA while reducing the nanocomposite production costs through the addition of cheaper natural bentonite as co‐nanofiller with the OMMT. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134, 44640. |
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Keywords: | biomedical applications composites copolymers degradation structure‐property relationships |
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