| Summary: | 碩士 === 國立勤益科技大學 === 化工與材料工程系 === 99 === The carbon fibers have the highest specific stiffness of any currently fibers. Novel carbon fiber-reinforced epoxy resin samples containing nanopoweders are prepared. In this study, the Taguchi experimental design methodology is used to optimize the composition of carbon fiber/epoxy resin nanocomposites comprising nano-alumina, nano-silica, carbon black nanoparticle, epoxy resin and diluent. The effects of nanopowders addition on the thermal stability, thermal expansion coefficient, water absorption, chemical resistance, storage modulus and glass transition temperature are then observed. The results show that epoxy/carbon fiber nanocomposite comprising 2 wt.% nano-Al2O3, 2 wt.% nano-SiO2, 2 wt.% carbon black nanoparticle, and 3.75 wt.% diluent increased the storage modulus by 14.72%, hardness by 2.95% and reduced the water absorption by 26.63%. That nanocomposite comprising 2 wt.% nano-Al2O3, 2 wt.% nano-SiO2, and 2 wt.% carbon black nanoparticle reduced the thermal expansion coefficient α1 by 33.93% and α2 by 24.21%, increased glass transition temperature by 6.54% compared to that of a carbon fiber/epoxy composite.
On the other hand, this study established the regression equation. The regression equation analysis was consistency with Taguchi experiments. Through the regression equation, this study predicted the various parameters as well as an important reference to the future development and processing of new products.
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