Surface Modification Of Carbon Fibers To Yield A Self-adaptable Interface Responding To Various Polymer Matrixes

To overcome the shortcoming of the traditional fiber surface treatment methods that can only adapt a few kinds of polymer matrix and must change the surface treatment agents before usage. In this paper, the hybrid nano-SiO2with mixed homopolymer brushes PHEA&PS were synthesized through ATRP, which could be grafted to CF through chemical bond to forming many-dimensions-reinforced system of fiber-nanoparticals-matrix, meanwhile forming self-adaptable interface to respond to various polymeric matrixes. When PS was as matrix, IFSS of composite increased from16.98MPa to26.48MPa. When epoxy was as matrix, IFSS of composite increased from29.84MPa to52.31MPa. The interfacial properties of composites were significantly improved and the self-adaptable interface was formed successfully. And these products were characterized by EA. FT-IR. XPS, ATR, DMA and SEM and so on. And DMA was also used to analyse the micro mechanics of CF/Epoxy, while the impact strength was measured by cantilever beam impact test. SEM was employed to analyse the influence of the introduction of nanoparticles on the mechanical properties preliminary. Employing this method, a self-adaptable interfacial structure can be yielded as preparing fiber reinforced polymeric composites with high performance.