섬유

role of polyacrylate starch copolymer in water sorption

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 239
water sorbence by saponified polyacrylonitrile-grafted polysaccharides was studied in relation to practical end uses. graft copolymers prepared from wheat flour, corn flour, cotton wool, and rayon fibers swelled to a gel, exhibiting a 10- to 20-fold increase in sorbency over the starting materials. a further enhanced water capacity was obtained when homopolymer was not removed. the mechanism of swelling to a gel appears to involve electrolyte osmotic pressure generated by a donnan equilibrium. grafting starch elevated its heat of water vaporization above that of pure water, and increased its capacity to adsorb water from ethanol-water vapor at 40 $degree$ above that of native starch. at higher temperatures, however, the dehydrating capacity decreased to that of native flour (edited author abstract) 21 refs
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