表面活性剂SDS/TX-100混合体系的NMR研究

波谱学杂志 ›› 2009, Vol. 26 ›› Issue (4): 466-475.

表面活性剂SDS/TX-100混合体系的NMR研究

1.波谱与原子分子物理国家重点实验室，武汉磁共振中心（中国科学院武汉物理与数学研究所），湖北武汉 430071；
2.中国科学院研究生院，北京 100049

收稿日期:2009-04-27 修回日期:2009-05-13 出版日期:2009-12-05 发布日期:2009-12-05
基金资助:
国家重点基础研究发展计划（“973”计划）资助项目(2009CB918600); 国家自然科学基金资助项目(20635040，20975111).

Mixed Micelles of Sodium Dodecyl Sulfate and Triton X-100 in Aqueous Solution Studied by ¹H NMR

1.State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Center for Magnetic Resonance (Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences), Wuhan 430071, China; 2.Graduals School of the Chinese Academy Sciences, Beijing 100049, China

Received:2009-04-27 Revised:2009-05-13 Online:2009-12-05 Published:2009-12-05
Supported by:
国家重点基础研究发展计划（“973”计划）资助项目(2009CB918600); 国家自然科学基金资助项目(20635040，20975111).

摘要/Abstract

摘要：

用NMR测量了不同比例的SDS/TX-100混合溶液中质子化学位移，结合表面活性剂溶液的两态交换模型，分析了质子化学位移随浓度的变化趋势，求出了不同比例混合溶液中两种表面活性剂各自的临界胶束浓度及混合胶束的临界胶束浓度. 依据理想混合溶液理论，预测了混合胶束的临界胶束浓度，计算了溶液中SDS与TX-100之间的相互作用参数和SDS在混合胶束中的摩尔分数. 根据所得参数讨论了混合胶束的形成过程. 利用文中和文献中混合体系的实验数据验证了协同作用理论改进前后的适用性，表明改进后的协同作用理论完善一些.

关键词: 核磁共振(NMR), 混合胶束, 临界胶束浓度, 相互作用参数, 十二烷基硫酸钠(SDS), 非离子表面活性剂(TX-100)

Abstract:

¹H chemical shifts of sodium dodecyl sulfate (SDS) and Triton X-100 (TX-100) were measured in their mixed aqueous solutions with different molar ratios. The critical micelle concentrations (cmc^*₁, cmc^*₂) of the two surfacents and the critical mixed micelle concentrations (cmc^*) at different molar ratios were calculated by simulating the chemical shift data using a two-state exchange model. The interaction parameters (β_M) and the composition of mixed micelles were evaluated. The mixed-micellization processes were discussed on the basis of the results obtained.

Key words: NMR, mixed micelle, critical micelle concentration, interaction parameter, sodium dodecyl sulfate, Triton X-100

中图分类号:

O482.53

杨春升, 崔晓红, 蒋艳, 毛诗珍, 刘买利. 表面活性剂SDS/TX-100混合体系的NMR研究[J]. 波谱学杂志, 2009, 26(4): 466-475.

YANG Chun-Sheng, CUI Xiao-Hong, JIANG Yan, MAO Shi-Zhen, LIU Mai-Li. Mixed Micelles of Sodium Dodecyl Sulfate and Triton X-100 in Aqueous Solution Studied by ¹H NMR[J]. Chinese Journal of Magnetic Resonance, 2009, 26(4): 466-475.

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