The role and potential of morpholinium-based ionic liquids in dissolution of cellulose
作者： Hong-wei Ren , Qing-hong Wang , Shao-hui Guo , Di-shun Zhao , Chun-mao Chen
DOI: 10.1016/J.EURPOLYMJ.2017.05.011
关键词:
摘要: Abstract The effective dissolution of cellulose prepares for its subsequently full utilization. Ionic liquids (ILs) are attractive options “green” cellulose. A series morpholinium-based ILs were synthesized and applied in ultrasonic assisted saturated calcium chloride solution was used to activate remarkable decrease (from 87% 65%) crystallinity facilitated process. type head-corn cations significantly increased polarity (ET(30)) hydrogen bond acidity (α) ILs. N-Allyl-N-methylmorpholinium-based showed the highest ET(30) α (59.11 kcal mol−1 0.51) compared 1-Allyl-3-methylimidazolium-based (57.41 kcal mol−1 0.46) 1-Allyl-3-methylpyridinium-based (49.36 kcal mol−1 0.33) owing electron-rich center oxygen morpholine ring. anions dominated ability accept Formate, acetate bisulfate contributed more basicity (β) (0.84, 0.88 0.91) N-allyl-N-methylmorpholinium-based comparison with other anions. Additionally, exhibited appropriate viscosity. Above-mentioned performances jointly improved This study demonstrated potential using as a class efficient solvents dissolve
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