高等学校化学学报

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (06): 1301.doi: 10.3969/j.issn.0251-0790.2012.06.030

• 物理化学 • 上一篇    下一篇

部分水解聚丙烯酰胺水溶液的零剪切黏度和临界浓度

陈琨1, 李海平2, 侯万国2   

  1. 1. 山东大学环境研究院, 济南 250100;
    2. 胶体与界面化学教育部重点实验室, 济南 250100
  • 收稿日期:2011-09-14 出版日期:2012-06-10 发布日期:2012-06-10
  • 通讯作者: 侯万国, 男, 博士, 教授, 主要从事胶体与界面化学研究. E-mail: wghou@sdu.edu.cn E-mail:wghou@sdu.edu.cn
  • 基金资助:

    山东省泰山学者基金(批准号: ts20070713)和山东省自然科学基金(批准号: 2009ZRB01722)资助.

Zero-shear Viscosity and Critical Concentrations of Aqueous Solution of Partially Hydrolyzed Polyacrylamide

CHEN Kun1, LI Hai-Ping2, HOU Wan-Guo2   

  1. 1. Environment Research Institute, Jinan 250100, China;
    2. Key Laboratory for Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, China
  • Received:2011-09-14 Online:2012-06-10 Published:2012-06-10

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被引次数

3

摘要： 通过蠕变和振荡实验分别测定了部分水解聚丙烯酰胺(PHPA)水溶液的零剪切黏度(η0)和线性黏弹区储能模量(G'), 并依据其浓度依赖性得到叠加浓度(C*)和交叠浓度(C*), 考察了温度、pH值和电解质(NaCl和CaCl2)浓度的影响. 结果表明, 随着温度的升高和电解质浓度的增大, PHPA水溶液的η0及G'减小, C*和C*增大; 电解质阳离子价态越高, 溶液黏度和临界浓度的变化越显著; 而随着pH值的增大, η0及G'先增大后减小, C*和C*先减小后增大.

关键词: 部分水解聚丙烯酰胺, 黏度, 临界浓度, 黏弹性

Abstract: Creep and oscillation experiments were performed to measure the zero-shear viscosity(η0) and storage modulus(G') of aqueous solution of partially hydrolyzed polyacrylamide(PHPA), respectively. The overlapping concentration(C*) and crossover concentration(C*) of PHPA solution were determined through the dependence of η0 on solution concentration(C). Effects of temperature, pH value and electrolytes(NaCl and CaCl2) on C* and C* were investigated. The results show that as temperature and electrolyte concentration are raised, η0 and G' decrease while C* and C* increase gradually. The higher the electrolyte cation valence is, the more obvious the induced variation of viscosity and critical concentrations of PHPA solution is. With pH value increasing, η0 and G' increase initially and decrease subsequently while C* and C* decrease first and increase afterwards.

Key words: Partially hydrolyzed polyacrylamide(PHPA), Viscosity, Critical concentration, Viscoelasticity

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