物理化学学报 >> 2011, Vol. 27 >> Issue (03): 671-676.doi: 10.3866/PKU.WHXB20110306

软物质 上一篇    下一篇

疏水缔合聚丙烯酰胺与双子表面活性剂的相互作用

陈洪1, 李二晓2, 叶仲斌1,2, 韩利娟2, 罗平亚1   

  1. 1. 西南石油大学油气藏地质及开发工程国家重点实验室, 成都 610500;
    2. 西南石油大学化学化工学院, 成都 610500
  • 收稿日期:2010-10-27 修回日期:2010-12-14 发布日期:2011-03-03
  • 通讯作者: 陈洪 E-mail:chenh@swpu.edu.cn
  • 基金资助:

    四川省青年基金(08ZQ026-001)资助项目

Interaction of Hydrophobically Associating Polyacrylamide with Gemini Surfactant

CHEN Hong1, LI Er-Xiao2, YE Zhong-Bin1,2, HAN Li-Juan2, LUO Ping-Ya1   

  1. 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, P. R. China;
    2. School of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, P. R. China
  • Received:2010-10-27 Revised:2010-12-14 Published:2011-03-03
  • Contact: CHEN Hong E-mail:chenh@swpu.edu.cn
  • Supported by:

    The project was supported by the Youth Fund of Sichuan Province, China (08ZQ026-001).

摘要:

制备了一种脂肪酸酯双磺酸盐型双子表面活性剂, 利用粘度法、界面张力法和原子力显微镜研究了疏水缔合聚丙烯酰胺与双子表面活性剂在溶液中的相互作用. 实验结果表明: 疏水缔合聚丙烯酰胺在溶液中能够通过自组装形成疏水微区并发展成网络结构, 疏水微区与表面活性剂在溶液中能形成混合胶束; 当一定量的表面活性剂加入时, 对疏水缔合聚丙烯酰胺的自组装起促进作用, 而过多双子表面活性剂的加入又会对聚合物分子的自组装起抑制作用, 从而显著影响疏水缔合聚丙烯酰胺的溶液性质, 随着表面活性剂浓度的增加, 聚合物溶液粘度先增加、再降低; 同时, 疏水缔合聚丙烯酰胺对双子表面活性剂的界面性能也有较大影响, 聚合物的加入使双子表面活性剂降低油/水界面张力的能力下降, 油/水界面张力达到平衡所需时间延长.

关键词: 双子表面活性剂, 疏水缔合聚丙烯酰胺, 界面张力, 粘度, 原子力显微镜

Abstract:

A fatty acid disulfonate anionic gemini surfactant was prepared and the structure of the surfactant was characterized by 1H-NMR. Hydrophobically associating polyacrylamide was prepared according to a procedure from literature. The interaction between the hydrophobically associating polyacrylamide (HAPAM) and the anionic gemini surfactant was studied by surface/interfacial tension, apparent viscosity, and atomic force microscopy (AFM). Experimental results show that HAPAM can form a network structure in the aqueous solution by self assembly. Mixed micelles are formed by the interaction of gemini surfactant micelles and the hydrophobic microdomain of the hydrophobically associating polyacrylamide in aqueous solution, which plays a remarkable role in the surfactant and polymer assembly. Mixed micelles can enhance the inter- or intra-molecular association between the polymer molecules and the surfactant, which increases the strength of the network formed by the hydrophobically associating polyacrylamide. The apparent viscosity of the solution increased by the addition of the gemini surfactant. When the addition of the gemini surfactant exceeded a certain amount, the association between the hydrophobic groups of the polymer decreased and the network formed by hydrophobically associating interaction was weakened by the surfactant micelles, which led to a decrease in solution viscosity. The polymer also largely influenced the interfacial properties of the gemini surfactant, especially the dynamical interfacial tension. A high polymer concentration led to an increase in the time required to reach equilibrium.

Key words: Gemini surfactant, Hydrophobically associating polyacrylamide, Interfacial tension, Viscosity, Atomic force microscopy

MSC2000: 

  • O647