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Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Fabrication and Properties of Ethylene Vinyl Acetate-Carbon Nanofiber Nanocomposites | Nanoscale Res Lett 2008 3 508-515 DOI 10.1007 s11671-008-9188-3 NANO EXPRESS Fabrication and Properties of Ethylene Vinyl Acetate-Carbon Nanofiber Nanocomposites Jinu Jacob George Anil K. Bhowmick Received 29 June 2008 Accepted 3 October 2008 Published online 25 October 2008 to the authors 2008 Abstract Carbon nanofiber CNF is one of the stiffest materials produced commercially having excellent mechanical electrical and thermal properties. The reinforcement of rubbery matrices by CNFs was studied in the case of ethylene vinyl acetate EVA . The tensile strength was greatly 61 increased even for very low fiber content i.e. 1.0 wt. . The surface modification of the fiber by high energy electron beam and gamma irradiation led to better dispersion in the rubber matrix. This in turn gave rise to further improvements in mechanical and dynamic mechanical properties of EVA. The thermal conductivity also exhibited improvements from that of the neat elastomer although thermal stability of the nanocomposites was not significantly altered by the functionalization of CNFs. Various results were well supported by the morphological analysis of the nanocomposites. Keywords Nanocomposite Carbon nanofiber EVA Reinforcement Elastomers Introduction Carbon nanofibers CNFs that are much smaller than conventional carbon fibers but significantly larger than carbon nanotubes CNTs can be used to produce nanocomposites with excellent properties which may open up many new applications. They are available in diameters ranging from 70 and 200 nm and length estimated to be 50-100 m 1 2 . CNFs generally exhibit a bamboo-like J. J. George A. K. Bhowmick El Rubber Technology Centre Indian Institute of Technology Kharagpur 721302 India e-mail anilkb@rtc.iitkgp.ernet.in conical structure as observed in transmission electron micrographs TEM J.J. George and A.K. Bhowmick personal communication . Use of CNFs as reinforcement to improve properties of various polymer matrix systems like polycarbonate epoxy
