Preparation of high moisture absorbent polyacrylonitrile fibers

In order to improve the moisture absorbency of conventional polyacrylonitrile fibers,the porous modified polyacrylonitrile fibers(HM-PAN) with good moisture absorbency were prepared with the blends of PAN and polyethylene glycol(PEG) by wet-spinning process,water bath post-treatment and alkaline hydrolysis.The effects of PEG molecular weight,PEG content and hydrolysis condition on moisture absorbency were studied.The results show that under the same hydrolysis conditions,increasing PEG molecular weight,PEG content improves the moisture absorbency of M-PAN.When PEG molecular weight and PEG content are fixed,the moisture absorbency of HM-PAN can be improved to a certain extent by adjusting hydrolysis temperatures,time,alkaline content and alkaline solution types.