Synthesis and Surface Activity of Biquaternary Ammonium Salt Gemini Surfactants with Ester Bond
Synthesis and Surface Activity of Biquaternary Ammonium Salt Gemini Surfactants with Ester Bond作者机构：College of Chemistry and Molecular Sciences WuhanUniversity Wuhan 430072 Huhei China
出 版 物：《Wuhan University Journal of Natural Sciences》 (武汉大学学报（自然科学英文版）)
年 卷 期：2008年第13卷第2期
页 面：227-231页
学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
基 金：the Natural Science Foundation of Hubei Province China (2000J023)
主 题：gemini surfactant synthesis property
摘 要：The synthesis and surface activity of gemini surfactants with ester bond as spacer are described. Their critical micelle concentrations （CMC） are much lower than that of conventional surfactants, i.e., 1.62×10^-5, 1.38×10^-5, 1.28×10^-5 mol·L^-1 for gemini Ⅰ, Ⅱ and Ⅲ respectively. Surface tension at the CMC of gemini Ⅰ, Ⅱ and Ⅲ were 36.4, 38.5, 41.2 mN · m^-1. The physico-chemical properties such as Krafft points, foaming abilities and emulsifying power were also investigated. It is found that the title compounds have low Krafft points and show good solubility in water. The gemini surfactants synthesized also exhibit good foaming properties and excellent emulsifying power toward toluene. The foaming abilities and emulsifying power increase with the increase in carbon number of hydrophobic chain, and this might be caused by the sheer viscosity of different gemini surfactant solution.
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