Efficient preparation of high concentration cellulose solution with complex DMSO/ILs solvent

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• 作者：Xinda Li ; Yue Zhang ; Jingwen Tang ; Ai Lan ; Yanping Yang…
• 关键词：Cellulose ; Complex solvent ; Dissolving ; Turbidity ; Conductivity ; Rheology
• 刊名：Journal of Polymer Research
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：23
• 期：2
• 全文大小：2,308 KB
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• 作者单位：Xinda Li (1)
  Yue Zhang (1)
  Jingwen Tang (1)
  Ai Lan (1)
  Yanping Yang (1)
  Magdi Gibril (2)
  Muhuo Yu (1)
  
  1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai, 201620, China
  2. Center of Fibers, Papers and Recycling, University of Gezira, Wad Madani, 999129, Sudan
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  Industrial Chemistry and Chemical Engineering
  Characterization and Evaluation Materials
  
• 出版者：Springer Netherlands
• ISSN：1572-8935

文摘

The development of a low-cost and efficient solvent for cellulose has been a longstanding challenge in the field of cellulose chemistry. In this paper, we further studied a highly effective cellulose solvent composed of a large amount of dimethyl sulfoxide (DMSO) and a small amount of 1-ethyl-3-methylimidazolium acetate ([C₂mim][CH₃COO]). The fact that DMSO/[C₂mim][CH₃COO] can dissolve cellulose more efficiently than pure [C₂mim][CH₃COO] was fully confirmed with a combination of polarized light microscope and turbidimetric measurements. 1H-NMR spectrographs and conductivity results indicated that an increased concentration of free [CH₃COO]− was the main reason for this enhanced dissolution ability. Rheology results revealed that cellulose-DMSO/ionic liquids (ILs) solution had lower zero shear viscosity, structural viscosity index, and viscous flow activation energy, which would contribute to its outstanding spinning property compared to other cellulose solutions. These advantages combined with the low cost of this proposed complex cellulose solvent make it promising to promote its industrial applications.