Patent ID: 8084121
Filing Date: 2011-12-27
Classification: B29C,B82Y,D01F,D04H,Y10T

Abstract:
1. A composite material formed of fine carbon fiber and resin, comprising a graphitized fine carbon fiber having linearity, each fiber filament of the carbon fiber having a bending angle of 30° or less with respect to the longitudinal direction of the fiber filament, wherein each fiber filament of the carbon fiber includes a hollow space extending along its axis, and has an outer diameter of 1 to 1,000 nm, an aspect ratio of 5 to 1,000, and a BET specific surface area of 2 to 2,000 m 2 /g, wherein the average interlayer distance (d 002 ) of the carbon fiber at a (002) plane is 0.345 nm or less as measured by means of X-ray diffractometry, and the ratio of the peak height (Id) of the band at 1,341 to 1,349 cm −1 in a Raman scattering spectrum of the carbon fiber to that of the peak height (Ig) of the band at 1,570 to 1,578 cm −1 in the spectrum; i.e., Id/Ig, is 0.1 to 2, wherein merely the fine carbon fiber is oriented in one direction through application of an external force to the composite material, and wherein the fine carbon fiber has a broken surface at a portion thereof.