나노 입자에 의한 탄소섬유 강화 복합재료의 층간계면특성에 관한 연구

Abstract

Up to an extensive industry including from aerospace to marine areas and daily supplies, the material which has a new characteristic is required and a ceaseless study has been progressed for its development. A representative material, carbon fiber reinforced composite material, has not only high strength of carbon fiber, high elastic modulus, high thermal conductivity, low coefficient of thermal expansion, and excellent mechanical properties in high temperature but also various excellent properties like corrosion resistance and chemical resistance, so it is used as the representative material for a reinforced plastic of composite material. With a fast development of carbon fiber property which receives most weights, the property of carbon fiber direction represented by a tensile strength is already reached to a quite competent level, but there still require improvements on plane shearing strength, interlayer shearing strength, and fracture strength affected from a base. Lately, an experiment introducing nano particles is highly interested to modify the carbon fiber surface for reinforcing a mechanical property of carbon fiber composite material. Nano particles on the carbon fiber surface exhibit a very effective possibility to solve an interlayer separation feature of carbon fiber composite material. Carbon nanotube could be typically known as the particle to improve interlayer mechanical property. It has excellent mechanic and electric characteristics so it is mainly used for addition nano particles of carbon fiber reinforced composite material. However, most of studies for various nano particles added composite material including current carbon nanotube are focused on improving one or two mechanical properties by adding nano particles. In addition, the expensive materials which are hard to apply in the field are dominant, so an increase of mechanical property is empirically obtained by adding nano particles which were not verified in the industrial field. Therefore, this study has investigated for primary factors that influence mechanical property, thermal property, and interlayer fracture toughness by individually comparing and analyzing carbon nanotube and other nano particles which are normally used in existing studies.