Gemini表面活性剂对疏水缔合聚丙烯酰胺界面吸附膜扩张流变性质的影响

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (5): 998.

Gemini表面活性剂对疏水缔合聚丙烯酰胺界面吸附膜扩张流变性质的影响

曹绪龙¹, 张磊², 程建波³

1. 中国石化胜利油田分公司地质科学研究院, 东营 257015;
2. 中国科学院理化技术研究所, 北京 100190;
3. 烟台大学化学生物理工学院, 烟台 264005

收稿日期:2009-08-31 出版日期:2010-05-10 发布日期:2010-05-10
通讯作者: 曹绪龙, 男, 博士, 教授级高级工程师, 主要从事油田化学研究工作. E-mail: luyiqiao@hotmail.com
基金资助:
国家重大科技专项基金(批准号: 2008ZX05011)和国家“八六三”项目(批准号: 2008AA092801)资助.

Effect of Gemini surfactant on the Interfacial Dilational Properties of Hydrophobically Modified Partly Hydrolyzed Polyacrylamide

CAO Xu-Long^1*, ZHANG Lei², CHENG Jian-Bo³

1. Geological Research Institute of Shengli Oilfield Co．Ltd, SINOPEC, Dongying 257015, China;
2. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China;
3. Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, China

Received:2009-08-31 Online:2010-05-10 Published:2010-05-10
Contact: CAO Xu-Long. E-mail: luyiqiao@hotmail.com
Supported by:
国家重大科技专项基金(批准号: 2008ZX05011)和国家“八六三”项目(批准号: 2008AA092801)资助.

摘要/Abstract

摘要：

采用小幅低频振荡和界面张力弛豫技术, 考察了疏水缔合水溶性聚丙烯酰胺(HMPAM)在正癸烷-水界面上的扩张黏弹性质, 研究了不对称Gemini表面活性剂C₁₂COONa-p-C₉SO₃Na对其界面扩张性质的影响. 研究发现, 疏水链段的存在, 使HMPAM在界面层中具有较快的弛豫过程, 扩张弹性显示出明显的频率依赖性. 表面活性剂分子可以通过疏水相互作用与聚合物的疏水嵌段在界面上形成类似于混合胶束的特殊聚集体. 表面活性剂分子与界面聚集体之间存在快速交换过程, 可以大大降低聚合物的扩张弹性. 同时, 聚合物分子链能够削弱表面活性剂分子长烷基链之间的强相互作用, 导致混合吸附膜的扩张弹性远低于单独表面活性剂吸附膜.

关键词: 扩张弹性; 扩张黏性; 疏水缔合聚丙烯酰胺; Gemini表面活性剂; 弛豫过程

Abstract:

The dilational viscoelastic properties of hydrophobically modified partly hydrolyzed polyacrylamide in the absence or presence of Gemini surfactant were investigated at the decane water interface by means of longitudinal method and the interfacial tension relaxation method. The dilational elasticity of polymer solution shows strong frequency dependence due to the fast process involving the exchange of hydrophobic micro-domains between the proximal region and distal region in the interface. Gemini surfactant plays different roles in influencing the structure of adsorbed polymer layer at different surfactant concentrations. At low surfactant concentration, the addition of surfactant molecules formed mixed film with polymer, resulting in the increase of dilational elasticity at low frequency. At the same time, polymer chain could sharply decrease the dilational elasticity of surfactant film mainly due to the weakening of the strong interactions among long alkyl chains in surfactant molecules. At high surfactant concentration, the addition of surfactant molecules can decrease the dilational elasticity of polymer solution due to the fast process involving in the exchange of surfactant molecules between the interface and the mixed complex formed by surfactant molecules and micro-domains.

Key words: Dilational elasiticity; Dilational viscosity; Hydrophobically modified partly hydrolyzed polyacrylamide(HMPAM); Gemini surfactant; Relaxation process

TrendMD:

曹绪龙, 张磊, 程建波. Gemini表面活性剂对疏水缔合聚丙烯酰胺界面吸附膜扩张流变性质的影响. 高等学校化学学报, 2010, 31(5): 998.

CAO Xu-Long*, ZHANG Lei, CHENG Jian-Bo. Effect of Gemini surfactant on the Interfacial Dilational Properties of Hydrophobically Modified Partly Hydrolyzed Polyacrylamide. Chem. J. Chinese Universities, 2010, 31(5): 998.

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