저온 플라즈마 처리를 이용한 파라 아라미드 섬유의 표면 개질 효과 및 역학적 특성(2)

Abstract

Para-aramid fibers were treated by atmosphere air plasma to improve the interfacial adhesion. The wettability ofplasma-treated aramid fiber was observed by means of dynamic contact angle surface free energy measurement. Surfaceroughness were investigated with the help of scanning electron microscopy and atomic force microscopy. The tensile test ofaramid fiber roving was carried out to determine the effect of plasma surface treatments on the mechanical properties of thefibers. A pull-out force test was carried out to observe the interfacial adhesion effect with matrix material. It was found thatsurface modification and a chemical component ratio of the aramid fibers improved wettability and adhesion characterization. After oxygen plasma, it was indicated that modified the surface roughness of aramid fiber increased mechanical interlockingbetween the fiber surface and vinylester resin. Consequently the oxygen plasma treatment is able to improve fiber-matrixadhesion through excited functional group and etching effect on fiber surface.