論文

査読有り
2016年6月

Superior cellulose-protective effects of cosolvent during enhanced dissolution in imidazolium ionic liquid

HOLZFORSCHUNG
  • Juan Tao
  • ,
  • Takao Kishimoto
  • ,
  • Satoshi Suzuki
  • ,
  • Masahiro Hamada
  • ,
  • Noriyuki Nakajima

70
6
開始ページ
519
終了ページ
525
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1515/hf-2015-0116
出版者・発行元
WALTER DE GRUYTER GMBH

To improve the solubility of cellulose at lower temperatures, several polar organic solvents were examined as cosolvents in imidazolium ionic liquid (IL). All tested cosolvents increased the solubilization efficiency of ILs at lower temperatures. Among these, N-methylimidazole, N-methyl-2-pyrrolidone, and dimethyl sulfoxide (DMSO) were notably efficient; in case of Avicel the solubility was increased, with 12-15% cellulose dissolution in 1-allyl-3-methylimidazolium chloride ([Amim]Cl) at 30 degrees C. IR spectra of the regenerated celluloses from IL/cosolvent systems showed characteristic features of cellulose II and/or amorphous cellulose. Thermogravimetric analyses showed significantly higher thermal stability of regenerated cellulose from [Amim]Cl/DMSO compared with that without DMSO. Moreover, dimethylacetamide (DMAc) increased the solubility of filter paper pulp in 1-ethyl-3-methylimidazolium acetate ([Emim]OAc), with 12% pulp dissolution at 30 degrees C. No decrease in the degree of polymerization (DP) of cellulose was observed with [Emim]OAc/DMAc, whereas 8-9% DP decrease was observed with [Emim] OAc, even at 30 degrees C. These results indicate that some cosolvents including DMSO and DMAc increase solubilization efficiency and have superior cellulose-protective effects during enhanced dissolution in ILs.

Web of Science ® 被引用回数 : 9

リンク情報
DOI
https://doi.org/10.1515/hf-2015-0116
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000376680300005&DestApp=WOS_CPL

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