物理化学学报 >> 2009, Vol. 25 >> Issue (04): 624-628.doi: 10.3866/PKU.WHXB20090414

研究论文 上一篇    下一篇

二甲基硅氧烷甘醇乙酸基共聚物水溶液的表面活性

王雅婧 徐桂英 敖明祺 朱艳艳   

  1. 山东大学胶体与界面化学教育部重点实验室, 济南 250100
  • 收稿日期:2008-10-23 修回日期:2009-01-07 发布日期:2009-03-31
  • 通讯作者: 徐桂英 E-mail:xuguiying@sdu.edu.cn

Surface Activity of Poly(dimethylsiloxane)ethoxylate/propoxylate in Aqueous Solution

 WANG Ya-Jing, XU Gui-Ying, AO Ming-Qi, ZHU Yan-Yan   

  1. Key Laboratory of Colloid Interface Chemistry, Ministry of Education, Shandong University, Jinan 250100, P. R. China
  • Received:2008-10-23 Revised:2009-01-07 Published:2009-03-31
  • Contact: XU Gui-Yang E-mail:xuguiying@sdu.edu.cn

摘要:

通过表面张力的测定, 考察了不同无机盐和温度对二甲基硅氧烷甘醇乙酸基共聚物(PSEP)表面活性的影响, 进而研究PSEP在不同介质中胶束形成热力学性质. 研究表明, NaCl、NaBr和CaCl2的存在可提高PSEP的表面活性. 而且, PSEP的胶束化焓变对熵变呈线性相关, 说明存在焓/熵补偿现象.

关键词: 硅表面活性剂, 表面活性, 焓/熵补偿

Abstract:

The surface tension and critical micelle concentration of poly(dimethylsiloxane)ethoxylate/propoxylate (PSEP) were determined. The effects of temperature and three different inorganic salts on micellization were also investigated. We found that the surface activity of the PSEP solution was enhanced by adding NaCl, NaBr, and CaCl2. The enthalpy-entropy plots of PSEP micelle formation in aqueous solution with various salts exhibited excellent linearity, meaning that enthalpy/entropy compensation existed in these systems.

Key words: Silicone surfactant, Surface activity, Enthalpy/entropy compensation

MSC2000: 

  • O648