CNT의 길이와 함량이 나노복합재료의 기계적 물성에 미치는 영향

Abstract

Carbon nanotubes have been considered to be ideal fillers for polymer composites, because of their outstanding mechanical properties and high aspect ratio. In this study, MWCNT/epoxy resin nanocomposites were fabricated with the different weight contests and lengths of MWCNT. Tensile test, hardness test, thermal analysis test and microscopy observation were carried out to investigate the mechanical properties, thermal stability and fracture surface of the MWCNT/epoxy resin nanocomposites. As a result, it clearly showed that the tensile strengths of the nanocomposites were greater than one of the pure epoxy resin. And, tensile strength of the nanocomposites with length of 80 um and 0.5 weight content MWCNT was best result among the various conditions. However, the Vicker's hardnesses of nanocomposites were almost same values regardless of the weight contents and lengths of MWCNT. Thermal analysis test showed that pyrolysis temperature of the nanocomposites were increased with the content of MWCNT. In FE-SEM images, fracture surface of the pure epoxy resin was smooth, while fracture surface of nanocomposites were more roughed as the increase of MWCNT content.