PROCESS FOR PRODUCTION OF PRECURSOR FIBER FOR PREPARING CARBON FIBER HAVING HIGH STRENGTH AND HIGH ELASTIC MODULUS
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United States of America Patent
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Issued Date -
Dec 22, 2011
app pub date -
Mar 5, 2010
filing date -
Mar 6, 2009
priority date (Note) -
Abandoned
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Abstract
The present invention provides a process for producing a precursor fiber which can provide a carbon fiber having high strength and high elastic modulus. The process of the present invention comprises a step where an aqueous solution of amphoteric molecule is prepared; a step where carbon nanotube is added to the aqueous solution of the amphoteric molecule so that the carbon nanotube is dispersed therein to prepare a dispersion of carbon nanotube; a step where the carbon nanotube dispersion is mixed with a polyacrylonitrile polymer and rhodanate or zinc chloride to prepare a spinning dope; a step where a coagulated yarn is prepared from the spinning dope by a wet or dry-wet spinning method; and a step where the coagulated yarn is drawn to give a precursor fiber for carbon fiber.
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