1130 カーボンナノチューブ含有樹脂射出成形板材の摩擦摩耗特性  [in Japanese] Friction Properties of Polymer Matrix Composites Filled with Carbon Nanotube  [in Japanese]

Carbon nanotubes (CNTs) are expected to be a new functional material. We studied fabrication of polystyrene (PS) matrix composites filled with multi-walled carbon nanotubes (MWCNTs) and vapor grown carbon fibers (VGCFs). The concentration of the fillers in the composites was varied from 0 to 50wt%. Specimens were fabricated by injection molding and friction coefficient and wear resistance of the surface of the molded specimens were measured using a ball-on-disk friction tester. In the case of VGCF/PS composites, the friction coefficient decreased with increasing the filler concentration, although the surface roughness increased with the filler concentration. Finally, the friction coefficient decreased from μ=0.45 to μ=0.2 when VGCF concentration was 50wt%. In the case of MWCNT/PS composites, the friction coefficient was almost same as that of bulk polystyrene when the MWCNT concentration was 30wt%. The specific wear rate of CNT/PS composites was also measured. The wear rate of MWCNT was 2.0×(10)^<-7> (mm)^3/N, that is eight-fold smaller than VGDCF/PS composites.