| Gemini表面活性剂的合成及性能 |
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| 引用本文： | 赵少静,程发,陈宇,魏玉萍,于占龙.Gemini表面活性剂的合成及性能[J].天津大学学报(自然科学与工程技术版),2012(1):81-86. |
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| 作者姓名： | 赵少静 程发 陈宇 魏玉萍 于占龙 |
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| 作者单位： | 天津大学理学院;武汉生物工程学院化学与环境工程系 |
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| 基金项目： | 国家自然科学基金资助项目(20704030) |
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| 摘 要： | 以二苯乙烷和长碳链脂肪酰氯为原料合成出Gemini磺酸表面活性剂,通过核磁氢谱和红外光谱对化合物的结构进行表征,测定了其水溶液的表面张力,得出其表面张力曲线,进而算出其他相关参数.3种Gemini表面活性剂的临界胶束浓度(CMC)值随烷基疏水碳链的增长而降低.与线性十二烷基苯磺酸钠(SDBS)相比,Gemini表面活性剂G12-2-12的C20值降低94.4%,CMC值降低91.3%.G12-2-12的饱和吸附面积(Amin)比对应单基表面活性剂的2倍降低27%,且Gemini表面活性剂在气液界面上排列更加紧密.
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| 关 键 词： | Gemini表面活性剂 烷基苯磺酸钠 表面张力 临界胶束浓度 |
Synthesis and Properties of Gemini Surfactants |
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| ZHAO Shao-jing,CHENG Fa,CHEN Yu,WEI Yu-ping,YU Zhan-long.Synthesis and Properties of Gemini Surfactants[J].Journal of Tianjin University(Science and Technology),2012(1):81-86. |
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| Authors: | ZHAO Shao-jing CHENG Fa CHEN Yu WEI Yu-ping YU Zhan-long |
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| Institution: | 1.School of Sciences,Tianjin University,Tianjin 300072,China;2.Department of Chemical and Environmental Engineering,Wuhan Bioengineering Institute,Wuhan 430415,China) |
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| Abstract: | A series of sulfonic-acid type Gemini surfactants were synthesized from 1,2-diphenylethane and long-chain aliphatic acyl chloride.Products obtained were characterized by 1H NMR and FT-IR;surface tension curve and related parameters were acquired by surface tension measurements.Results showed that the critical micelle concentra-tion(CMC) decreased with the increasing hydrophobic chain length.Compared with the corresponding linear sodium dodecy1 benzene sulfonate(SDBS),the C20 and CMC of Gemini surfactant G12-2-12 decreased by 94.4% and 91.3%,respectively.The area occupied by the surfactant molecule at the air/water interface(Amin)of G12-2-12 was 27%,less than two times that of SDBS,which suggested that Gemini surfactants packed more closely. |
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| Keywords: | Gemini surfactant alkylbenzene sulfonate surface tension critical micelle concentration |
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