高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (6): 1434.doi: 10.7503/cjcu20121153

• 物理化学 • 上一篇    下一篇

弛豫法研究预交联颗粒凝胶的界面扩张流变性质

唐黎1,2, 罗澜1, 方洪波3, 宗华3, 张磊1, 张路1, 赵濉1   

  1. 1. 中国科学院理化技术研究所, 北京 100190;
    2. 中国科学院大学, 北京 100049;
    3. 中国石化胜利油田胜利工程设计咨询有限公司, 东营 257000
  • 收稿日期:2012-12-20 出版日期:2013-06-10 发布日期:2013-05-15
  • 通讯作者: 赵濉,男,研究员,主要从事胶体与界面化学研究.E-mail:zhaosui@mail.ipc.ac.cn;张路,男,博士,副研究员,主要从事胶体与界面化学研究.E-mail:luyiqiao@hotmail.com E-mail:zhaosui@mail.ipc.ac.cn;luyiqiao@hotmail.com
  • 基金资助:

    国家科技重大专项项目(批准号: 2011ZX05011-004)资助.

Dilational Rheology Properties of Branch-performed Particle Gel by Relaxation Measurements

TANG Li1,2, LUO Lan1, FANG Hong-Bo3, ZONG Hua3, ZHANG Lei1, ZHANG Lu1, ZHAO Sui1   

  1. 1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Shengli Engineering and Consulting Co., Ltd., Shengli Oilfield Company of SINOPEC, Dongying 257000, China
  • Received:2012-12-20 Online:2013-06-10 Published:2013-05-15
  • Contact: O647 E-mail:zhaosui@mail.ipc.ac.cn;luyiqiao@hotmail.com

摘要:

采用界面张力弛豫方法研究了一种新型聚合物——预交联颗粒凝胶(PPG)的界面流变性质, 考察了电解质及传统直链聚丙烯酰胺与PPG的相互作用对体系界面性质的影响, 计算得到了各体系界面扩张弹性和黏性的全频谱, 并通过归一法计算得到了相应的Cole-Cole图. 结果表明, 随着体相浓度的增加, PPG在界面层中形成网络结构, 界面扩张弹性和黏性大幅增强. 电解质能够中和PPG结构中的电荷, 明显降低扩张弹性和黏性. 直链聚丙烯酰胺与PPG在界面上可能形成更为复杂的结构, 膜的黏弹性由PPG决定.

关键词: 预交联颗粒凝胶, 聚丙烯酰胺, 扩张流变, 界面张力弛豫法, Cole-Cole图

Abstract:

The interfacial dilational rheological properties of a novel polyacrylamide derivative, branch-preformed particle gel(PPG), were studied by interfacial tension relaxation measurements. The effects of electrolytes and conventional polyacrylamide on dilational rheological properties of PPG were studied. The dilational elasticity and viscosity components of different systems were calculated by Fourier transform and displayed as Cole-Cole curves. The results show that interfacial elasticity and viscosity components of PPG solutions both increase due to the formation of interfacial net structure with the increasing bulk concentration. Electrolyte will neutralize the excess charge of PPG, thus decreases dilational elasticity and viscosity. When mixed with liner polyacrylamide, the more complex structure is formed, but the overall viscoelasticity of the system is still determined by PPG.

Key words: Branch-preformed particle gel(PPG), Polyacrylamide, Dilational rheology, Interfacial tension relaxation, Cole-Cole curve

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