Fabrication and characterization of functionalized graphite reinforced polyvinyl alcohol based composites
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Date
2019-07
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
Biodegradable polymer based composites are applying themselves in almost every engineering field because of their cost effectiveness and biodegradable behaviour. Polyvinyl alcohol is one of the important biodegradable polymer which gains worldwide consideration from the last decade for the development of composites. Cross linking of PVA is done by using citric acid. As graphite is inert in nature, oxidative acidic treatment has been done to obtain functionalized graphite. Use of functionalized graphite as reinforcement material enhance the mechanical and thermal characteristics of fabricated composites. This work reveals the systematic methodology of fabrication and evaluation of diverse properties of the cross-linked polyvinyl alcohol and functionalized graphite reinforced composites. After fabrication, cross linked polyvinyl alcohol f-graphite reinforced composites, with varying functionalized graphite weight percentages of PVA (0%, 0.5%, 1%, 1.5% & 2%) were put to investigation. Fabricated samples are firstly examined on the basis of physical tests which included water absorption tests. Micro structural tests included the Scanning electron microscope (SEM), mechanical tests comprised of the tensile test. Finally, the thermal tests were also done which involved the Thermo gravimetric analysis (TGA), Differential thermal analysis (DTA) and Dynamic mechanical analysis (DMA). The polyvinyl alcohol based composite with 1 weight % graphite content is confirmed to have optimum mechanical and thermal properties in comparison to other weight percentages under this scrutiny which was authenticated by the micro-structural and mechanical tests.
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