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Effect of graphene oxide nanosheets on the physico-mechanical properties of chitosan/bacterial cellulose nanofibrous composites
Affiliation:1. Materials Science and Engineering Department, Sharif University of Technology, P.O. Box: 11365-9466, Tehran, Iran;2. Ceramic Department, Materials and Energy Research Center, 14155-4777 Karaj, Alborz, Iran;3. Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11365-9466, Azadi Avenue, 14588 Tehran, Iran;1. Department of Pharmacy, COMSATS Institute of Information Technology, 22060 Abbottabad, Pakistan;2. Department of Chemistry, COMSATS Institute of Information Technology, 22060 Abbottabad, Pakistan;3. Department of Chemical Engineering, Kyungpook National University, Buk-ku Sankyuk-dong 1370, Daegu 41566, South Korea;1. Key Laboratory of Analytical Chemistry for Biology and Medicine, Ministry of Education, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, China;2. Electrical Power Research Institute of Guangdong Power Grid Co., Ltd, Guangdong, 510000, China;1. Department of Materials Science and Engineering, Sharif University of Technology, P.O. Box 11155-9161, Azadi Avenue, 14588 Tehran, Iran;2. Institute for Nanoscience and Nanotechnology, Sharif University of Technology, P.O. Box 11365-9466, Azadi Avenue, 14588 Tehran, Iran
Abstract:In this work, novel chitosan/bacterial cellulose (CS/BC) nanofibrous composites reinforced with graphene oxide (GO) nanosheets are introduced. As cell attachment and permeability of nanofibrous membranes highly depend on their fiber diameter, the working window for successful electrospinning to attain sound nanofibrous composites with a minimum fiber diameter was determined by using the response surface methodology. It is shown that the addition of GO nanosheets to CS/BC significantly reduces the average size of the polymeric fibers. Their mechanical properties are also influenced and can be tailored by the concentration of GO. Fourier transform infrared spectroscopy reveals hydrogen bonding between the GO nanosheets and the polymer matrix. A decrease in the hydrophilicity of the electrospun nanofibers and their water vapor permeability with the addition of GO are also reported. The prepared nanofibrous composites are potentially suitable candidates for biomedical applications such as skin tissue engineering and wound dressing.
Keywords:A. Biocomposite  A. Nano-structures  B. Mechanical properties  E. Electrospinning
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