| 摘要 |
PURPOSE:To obtain carbon fibers useful as a reinforcing material for resins, showing a plus value of a zeta potential on the surface of the fibers, having excellent adhesiveness to a matrix. CONSTITUTION:A solution of an acrylonitrile-methacrylic acid copolymer in dimethylformamide is subjected to wet spinning to give acrylic fibers, which are subjected to flame-resistant treatment, carbonized in a nitrogen gas atmosphere and electrolytically oxidized. Then the fibers are immersed in an aqueous solution of an adduct of laurylamine to ethylene oxide and then dried to give carbon fibers having a zeta potential of >=0mV at pH 2-6 of a flow solution measured on the surface of the fibers by flow potential method. |
