METHOD FOR PRODUCING PRECURSOR FIBER FOR OBTAINING CARBON FIBER HAVING HIGH STRENGTH AND HIGH ELASTIC MODULUS

WIPO Patent Application WO/2010/100941

A1

Disclosed is a method for producing a precursor fiber which enables production of a carbon fiber having high strength and high elastic modulus. The method for producing a precursor fiber comprises: a step of preparing an aqueous solution of amphoteric molecules; a step of preparing a carbon nanotube dispersion solution by adding carbon nanotubes into the aqueous solution of amphoteric molecules and dispersing the carbon nanotubes therein; a step of preparing a spinning raw material solution by mixing the carbon nanotube dispersion solution with a polyacrylonitrile polymer and a rhodan salt or zinc chloride; a step of obtaining a coagulated yarn from the spinning raw material solution by a wet or dry-wet spinning method; and a step of obtaining a precursor fiber for a carbon fiber by drawing the coagulated yarn.

ABE YUKIHIKO (JP)
NISHIMURA HIROKAZU (JP)
HIRAO KOICHI (JP)
YAMAGUCHI SHINSUKE (JP)
SAKURA DAISUKE (JP)
WATANABE YOSHIHIRO (JP)
FUGETSU BUNSHI

PCT/JP2010/001545

September 10, 2010

March 05, 2010

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TOYO BOSEKI (JP)
JAPAN EXLAN CO LTD (JP)
UNIV HOKKAIDO NAT UNIV CORP (JP)
ABE YUKIHIKO (JP)
NISHIMURA HIROKAZU (JP)
HIRAO KOICHI (JP)
YAMAGUCHI SHINSUKE (JP)
SAKURA DAISUKE (JP)
WATANABE YOSHIHIRO (JP)
FUGETSU BUNSHI

D01F6/18; D01F6/54; D01F9/22

WO2008112349A2

2008-09-18

JP2006200114A	2006-08-03
JP2008201635A	2008-09-04
JP2008201965A	2008-09-04
JP2008204872A	2008-09-04
JPH0157165B2	1989-12-04
US20040180201A1	2004-09-16

KAZAHAYA, Nobuaki et al. (JP)
Nobuaki Kazahaya (JP)

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