METHOD FOR MODIFYING SURFACE OF CARBON FIBER

摘要

PURPOSE:To improve wettability on the surface of carbon fiber and enhance adhesion of the carbon fiber to a matrix resin by subjecting the surface of the carbon fiber to fluorinating treatment and then removing the chemically adsorbed fluorine component present on the surface. CONSTITUTION:The surface of carbon fiber is preferably presubjected to oxidizing treatment and then fluorinating treatment in fluorine gas. The fluorine component, produced during the above-mentioned treatment and chemically adsorbed on the surface of the carbon fiber is then washed with water and removed. Thereby, the wettability on the fiber surface is improved to improve the adhesion of the carbon fiber to a matrix resin. The resultant carbon fiber is suitable as carbon reinforcing fiber for composite materials.