中山大学学报自然科学版 ›› 2010, Vol. 49 ›› Issue (2): 60-64.

• 研究论文 • 上一篇    下一篇

微晶纤维素/1-丁基-3-甲基咪唑氯体系流变性能研究

张文凯,王 悦,李 玮,张黎明   

  1. (中山大学新型聚合物材料设计合成与应用广东省高校重点实验室//聚合物复合材料与功能材料教育部重点实验室//化学与化学工程学院,广东 广州 510275)
  • 收稿日期:2009-10-07 修回日期:1900-01-01 出版日期:2010-03-25 发布日期:2010-03-25

Rheology Properties of Microcrystalline Cellulose/ 1-Butyl3-Methylimidazolium Chloride Solutions

ZHANG Wenkai, WANG Yue, LI Wei, ZHANG Liming   

  1. (DSAPM Lab// PCFM Lab of CM Institute// School of Chemistry and Chemical Engineering, Sun Yatsen University, Guangzhou 510275, China)
  • Received:2009-10-07 Revised:1900-01-01 Online:2010-03-25 Published:2010-03-25

摘要: 离子液体1-丁基-3-甲基咪唑氯(BmimCl)可用作溶解微晶纤维素(MCC)的优良溶剂。通过稳态剪切和动态扫描测试考察了微晶纤维素离子液体溶液的流变性能。结果表明,所有浓度的MCC/BmimCl溶液在高剪切速率和低剪切速率表现出剪切变稀行为。温度和浓度对MCC/BmimCl溶液的黏弹性质产生重要影响。将复合黏度数据用于Cross模型,并利用Arrhenius公式计算了不同浓度MCC/BmimCl溶液的流动活化能。

关键词: 微晶纤维素, 离子液体, 1-丁基-3-甲基咪唑氯, 稳态剪切, 活化能

Abstract: The ionic liquid of 1butyl3methylimidazolium chloride (BmimCl) was used as a good solvent to dissolve cellulose. The rheological properties of the cellulose ionic liquid (MCC/BmimCl) solutions were investigated by steady shear and oscillatory shear measurements. The results indicated that all the MCC/BmimCl solutions showed a shear thinning behavior at both high shear rates and low shear rates. The concentration of MCC/BmimCl solution and temperature had an important influence on the viscoelastic properties of MCC/BmimCl solution. Cross viscosity model was used to fit experimental data of complex viscosity, and the activation energies for shear flow were determined using Arrhenius formula.

Key words: microcrystalline cellulose, ionic liquids, 1butyl3methylimidazolium chloride, shear rheology, activation energy

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