Electromotive force study on interaction between a triblock copolymer and cationic surfactants in water
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- 作者：Guobao Li (1) (2)
Hongguang Li (3)
Jingcheng Hao (1) - 关键词：Electromotive force ; Triblock copolymer ; F127 ; Cationic surfactants ; Binding isotherms
- 刊名：Colloid & Polymer Science
- 出版年：2013
- 出版时间：June 2013
- 年：2013
- 卷：291
- 期：6
- 页码：1479-1486
- 全文大小：479KB
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Hongguang Li (3)
Jingcheng Hao (1)
1. Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, 250100, People’s Republic of China
2. School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, People’s Republic of China
3. Laboratory of Clean Energy Chemistry and Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, People’s Republic of China - ISSN：1435-1536
文摘
The interaction between a poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) triblock copolymer F127 and three cationic surfactants with varying alkyl chain length in water were investigated in detail by electromotive force (EMF) studies. The cationic surfactants investigated are hexadecyltrimethylammonium bromide (HTAB), myristytrimethylammonium bromide (MTAB), and lauryltrimethylammonium bromide (LTAB) which have carbon numbers of 16, 14, and 12 in the alkyl chain, respectively. Obvious binding was detected by EMF measurements between F127 and HTAB. For MTAB, the binding has also been detected with a weaker strength than that of HTAB. The LTAB/F127 mixed system exhibits the weakest binding, presumably due to the too short alkyl chain. This indicates that the binding between cationic surfactants and F127 is mainly dominated by the hydrophobic/hydrophobic interaction. In addition, the interaction also shows considerable dependence on the concentration of F127 and solution parameters such as the salinity.