CARBON FIBER COMPOSITE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a carbon fiber composite material dispersed with carbon nano fibers uniformly and especially showing a small thermal expansion in a wide temperature range. SOLUTION: This carbon composite material contains an elastomer and 15-50 volume% carbon nano fibers dispersed in the elastomer. The elastomer has an unsaturated bond or a group having a compatibility towards the carbon nano fibers, and the carbon nano fibers have 0.7-15 nm mean diameter and 0.5-100μm mean length. The carbon fiber composite material shows≤100 ppm/K mean linear expansion coefficient at -80 to 300°C and also <120 ppm/K differential value of the linear expansion coefficient. COPYRIGHT: (C)2007,JPO&INPIT