To provide a method for producing a superfine carbon fiber having a long fiber length and not having a branch by using a lignin derivative derived from biomass as a raw material and by only simple steps.
The method for producing the superfine carbon fiber includes the following steps (1) to (4). (1) A step of mixing 100 pts.mass thermoplastic resin, 1-50 pts.mass lignin derivative, and 0.1-10 pts.mass lignin fiberization assistant with each other in a molten state, and forming a precursor fiber from the obtained resin composition, (2) A step of forming the infusiblized precursor fiber by curing the lignin derivative contained in the precursor fiber, (3) A step of forming a stabilized lignin derivative fiber by removing the thermoplastic resin from the infusiblized precursor fiber, and (4) A step of obtaining the superfine carbon fiber by carbonizing or graphitizing the stabilized lignin derivative fiber under an inert gas atmosphere.
COPYRIGHT: (C)2011,JPO&INPIT
KOMURA NOBUYA
YASUDA EIICHI
OTANI ASAO
TOKYO INST TECH
| JP2002038334A | 2002-02-06 | |||
| JP2006233395A | 2006-09-07 | |||
| JP2002038334A | 2002-02-06 | |||
| JP2006233395A | 2006-09-07 |
Next Patent: FLAME-PROOF FIBER FOR HIGH STRENGTH CARBON FIBER, AND METHOD FOR PRODUCING THE SAME