| abstract |
An object of the present invention is to provide a method for efficiently producing carbon fibers, more preferably ultrafine carbon fibers, and to provide ultrafine carbon fibers having excellent mechanical properties and a fiber diameter of 0.001 μm to 5 μm. 1) A mixture of 100 parts by weight of a thermoplastic resin and 1 to 150 parts by weight of at least one carbon precursor organic compound (A) selected from the group consisting of pitch, polyacrylonitrile, cellulose, and polycarbodiimide. Thereafter, a step (1) of producing a carbon fiber precursor (B) by spinning 2) Step (2) of producing a carbon fiber stabilized precursor (C) by stabilizing the carbon precursor organic compound (A) contained in the carbon fiber precursor (B). 3) Step of removing thermoplastic resin contained in carbon fiber stabilizing precursor (C) (3) 4) Step of carbonizing or graphitizing the carbon fiber stabilizing precursor (D) excluding the thermoplastic resin to produce carbon fibers (4) A method for producing a carbon fiber comprising: [Selection diagram] None |