丙烯酰胺改性甲壳素聚电解质的流变性质研究

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英文篇名：Rheological Properties of Acrylamide Modified Chitin Polyelectrolyte 作者：石杰 ; 喻宁波 ; 邓杰 ; 李国祥 英文作者：SHI Jie;YU Ningbo;DENG Jie;LI Guoxiang;School of Chemical and Environmental Engineering,Hubei Minzu University;Hubei Key Laboratory of Biological Resources Protection and Utilization(Hubei Minzu University); 关键词：丙烯酰胺改性甲壳素 ; 牛顿流体 ; 流变特性 英文关键词：acrylamide modified chitin polyelectrolyte;;Newtonian fluid;;rheological properties 中文刊名：HBXZ 英文刊名：Journal of Hubei Minzu University(Natural Science Edition) 机构：湖北民族大学化学与环境工程学院;生物资源保护与利用湖北省重点实验室(湖北民族大学); 出版日期：2019-06-17 出版单位：湖北民族学院学报(自然科学版) 年：2019 期：v.37 基金：国家自然科学基金项目(51563007);; 生物资源保护与利用湖北省重点实验室开放基金项目(PKLHB1716) 语种：中文; 页：HBXZ201902002 页数：5 CN：02 ISSN：42-1569/N 分类号：9-13

摘要

研究了丙烯酰胺改性甲壳素(AMC)聚电解质溶液的流变学性质.结果表明,AMC水溶液的线性粘弹流体应变范围为0～25%,溶液由粘性流体向弹性流体转变的临界质量分数为3 wt%.AMC水溶液在极低质量分数时溶液呈现出牛顿流体行为,随着质量分数的增加,AMC水溶液逐渐向假塑性流体行为转变.外加盐的物质的量浓度在高剪切速率区对AMC溶液的稳态流动行为影响较小,在低速率区,物质的量浓度为0.2 mol/L和0.6 mol/L的NaCl会增加AMC溶液的表观粘度.频率扫描和温度扫描结果显示,随着AMC溶液质量分数的增加,储能模量(G′)、损耗模量(G″)的交点逐渐向低频区移动,3 wt%、4 wt%的AMC水溶液的凝胶转变温度分别为20℃和30℃.
        The rheological properties of acrylamide modified chitin polyelectrolyte(AMC) solution were investigated in this papers.The results indicated that AMC aqueous solution presented a linear viscoelastic fluid in the strain range from 0 to 25%.The critical mass fraction for transition from viscous fluid to elastic fluid was determined to be 3 wt%.Steady-shear flow study showed the behavior of AMC dilute solution was a Newtonian fluid.And it would have the behavior of pseudoplastic fluid with the increase of mass fraction.The apparent viscosity of AMC solution would be increased in the appropriate concentration of salt solution at the low shear rate region.The intersections of storage modulus(G′) and loss modulus(G″) gradually moved to the low frequency region with the increase of concentration.The gel transition temperatures of 3 wt% and 4 wt% AMC aqueous solution were 20 ℃ and 30 ℃,respectively.

引文

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