| NaCl对烷基苯磺酸盐Gemini表面活性剂水溶液性质的影响 |
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| 引用本文： | 孟君,路遥,吴会觉,张鑫.NaCl对烷基苯磺酸盐Gemini表面活性剂水溶液性质的影响[J].化学通报,2009,72(10). |
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| 作者姓名： | 孟君 路遥 吴会觉 张鑫 |
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| 作者单位： | 中国科学院理化技术研究所北京,100190 |
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| 摘 要： | 采用旋滴法测定了烷基苯磺酸盐Gemini表面活性剂Ia水溶液与正庚烷的界面张力,用超微电极循环伏安法测定了水溶液中Ia的胶束扩散系数.结果发现,NaCl的加入能够使界面张力降低2倍左右,使Ia的胶束扩散系数变大;Ia浓度增大,胶束扩散系数变小,而NaCl浓度增大,胶束扩散系数变大.这些变化说明NaCI的加入使得Ia胶束大小发生了变化.这是由于NaCl的加入降低了Ia离子头基之间的静电斥力,使得Ia分子排列更加紧密,更有效降低了油水的界面张力,使胶束形状变小;同时胶束表面电荷得到中和,胶束的静电斥力相应减小,胶束流动性相应增加,从而表现出较大的胶柬扩散系数.
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| 关 键 词： | 烷基磺酸盐 Gemini表面活性剂 胶束扩散系数 界面张力 |
Effect of NaCl on the Properties of Alkylbenzene Sulfonate Gemini Surfactant |
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| Meng Jun,Lu Yao,Wu Huijue,Zhang Xin.Effect of NaCl on the Properties of Alkylbenzene Sulfonate Gemini Surfactant[J].Chemistry,2009,72(10). |
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| Authors: | Meng Jun Lu Yao Wu Huijue Zhang Xin |
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| Institution: | Technical Institute of Physics and Chemistry;Chinese Academy of Sciences;Beijing 100190 |
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| Abstract: | The effects of NaCl on the properties of alkylbenzene sulfonate Gemini surfactant have been investigated by spinning drop method and ultramicroelectrode (UME) cyclic voltammetry. Spinning drop method and UME are used to measure the interfacial tension between Gemini Ia aqueous solution and heptane and the diffusion coefficient of Ia in aqueous solutions. It has been found that the interfacial tension decreases and the diffusion coefficient increases with the addition of Nacl;the diffusion coefficient decrea... |
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| Keywords: | Alkylbenzene Sulfonate Gemini surfactant Diffusion coefficient Interfacial tension |
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