物理化学学报 >> 2013, Vol. 29 >> Issue (09): 2013-2018.doi: 10.3866/PKU.WHXB201306283

软物质 上一篇    下一篇

阿拉伯树胶对Gemini表面活性剂界面扩张流变性质的影响

熊可洁, 舒展霞, 聂海渝, 杜凤沛   

  1. 中国农业大学理学院应用化学系, 北京 100193
  • 收稿日期:2013-05-03 修回日期:2013-06-26 发布日期:2013-08-28
  • 通讯作者: 杜凤沛 E-mail:dufp@cau.edu.cn
  • 基金资助:

    中央高校基本科研业务费专项资金(15053134)资助

Impact of the Addition of Gum Arabic on the Interface Dilational Properties of Gemini Surfactants

XIONG Ke-Jie, SHU Zhan-Xia, NIE Hai-Yu, DU Feng-Pei   

  1. Department of Applied Chemistry, College of Science, China Agriculture University, Beijing 100193, P. R. China
  • Received:2013-05-03 Revised:2013-06-26 Published:2013-08-28
  • Contact: DU Feng-Pei E-mail:dufp@cau.edu.cn
  • Supported by:

    The project was supported by the Chinese Universities Scientific Fund (15053134).

摘要:

利用悬挂滴方法研究了Gemini季铵盐表面活性剂(C12-Ph-C12和C12-8-C12)和阿拉伯树胶的界面张力和界面扩张流变性质, 考察了阿拉伯树胶对C12-Ph-C12和C12-8-C12溶液界面张力和界面扩张流变性质的影响. 研究结果表明, 1%(w)阿拉伯树胶的加入显著降低了C12-Ph-C12和C12-8-C12的界面张力, 但是界面扩张模量增加,这一变化主要是由于阿拉伯树胶分子与Gemini季铵盐表面活性剂分子通过静电相互作用形成复合物. 文中提出了不同结构Gemini季铵盐表面活性剂与阿拉伯树胶分子在界面排布的示意图.

关键词: Gemini表面活性剂, 分子结构, 阿拉伯胶, 界面, 扩张性质

Abstract:

We studied the impact of the addition of Gum Arabic on the dilational properties of Gemini surfactants. The investigation found that the addition of 1% (w) Gum Arabic in the Gemini surfactants solutions caused a decrease in the interfacial tension, but the addition of 1% (w) Gum Arabic resulted in the dilational modulus increasing significantly. The explanation to this observation is that the electrostatic interaction of the Gum Arabic/surfactant complex increased and the dilational modulus increased. A possible schematic diagrams of the adsorbed Gemini molecules with Gum Arabic at the decane/water interface is proposed.

Key words: Gemini surfactant, Molecular structure, Gum Arabic, Interface, Dilational property

MSC2000: 

  • O647