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首页> 外文期刊>Journal of Polymers and the Environment >Rheology of Concentrated Cellulose Solutions in 1-Butyl-3-methylimidazolium Chloride
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Rheology of Concentrated Cellulose Solutions in 1-Butyl-3-methylimidazolium Chloride

机译：1-丁基-3-甲基咪唑鎓氯化物中浓纤维素溶液的流变学

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摘要

Rheological behavior of the concentrated cellulose/1-butyl-3-methylimidazolium chloride ([BMIM]Cl) solutions was investigated. As polymeric fluid, solutions of cellulose in [BMIM]Cl display a marked elastic behavior under shear flow. The dependence of the shear viscosity η, and of the dynamic modulus, on concentration, average degree of polymerization (DP) and temperature is discussed. At lower concentrations and degrees of polymerization (DP), cellulose solutions show viscous, inelastic behavior at low frequencies and low shear rate. At higher concentration and DP, cellulose solutions are more elastic at higher frequencies and shear rate. Such solutions also have some usual rheological properties. The dynamic rheological responses revealed that the Cox-Merz rule did not hold for these cellulose solutions at high deformation rate. Plotting storage modulus G' against loss modulus G" gave almost a master curve which is independent of temperature and concentration, with the slope of about 1.651 for 10 wt% cellulose solutions. This value indicates the existence of microheterogeneity in the solution system.
机译：研究了浓纤维素/ 1-丁基-3-甲基咪唑鎓氯化物（[BMIM] Cl）溶液的流变行为。作为聚合物流体，纤维素在[BMIM] Cl中的溶液在剪切流下显示出明显的弹性行为。讨论了剪切粘度η和动态模量对浓度，平均聚合度（DP）和温度的依赖性。在较低的浓度和聚合度（DP）下，纤维素溶液在低频和低剪切速率下显示出粘稠，无弹性的行为。在较高的浓度和DP下，纤维素溶液在较高的频率和剪切速率下更具弹性。这样的溶液也具有一些通常的流变性质。动态流变响应表明，在高变形速率下，这些纤维素溶液的Cox-Merz规则不成立。相对于损耗模量G”绘制储能模量G'几乎给出了一条主曲线，该曲线与温度和浓度无关，对于10重量％的纤维素溶液，其斜率约为1.651。该值表明溶液体系中存在微异质性。

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  • 来源
    《Journal of Polymers and the Environment》 |2009年第4期|273-279|共7页
  • 作者

    Xun Chen; Yumei Zhang; Lingyan Cheng; Huaping Wang;

  • 作者单位

    State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, People's Republic of China;

    State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, People's Republic of China;

    State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, People's Republic of China;

    State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai 201620, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    cellulose; solution; ionic liquid; rheology;

    机译：纤维素解;离子液体流变学;

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