섬유

studies on bound water of cellulose by differential scanning calorimetry

  • 출판일1999.03
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 236
in the reported experiments, the crystallization and melting of adsorbed water on cellulose samples such as cotton, kapok, linen, jute, various rayons, and wood cellulose have been studied using a differential scanning calorimeter (dsc). two exothermic peaks of crystallization of adsorbed water on the cellulose samples are observed. one is a sharp peak (peak i) observed at about 255 k in a dsc curve; the other is a broad peak (peak ii) observed at about 230-250 k. judging from the amounts of water calculated from the results obtained by the dsc study, there seems to be some nonfreezing water which does not crystallize. the bound water content is dependent on the degree of crystallinity of cellulose samples. the amounts of bound water estimated are from 1. 0 to 2. 2 moles per one glucose unit of cellulose. 21 refs
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