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扩张流变法研究表面活性剂在界面上的聚集行为 被引量:15

Study on the Aggregation Behavior of Surfactant at Interface by the Dilatational Rheological Methods
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摘要 近年发展起来的界面流变测定技术在研究界面性质方面具有许多独特之处。本文结合我们的工作,总结了近年来有关该技术在表面活性剂界面聚集行为研究中的应用,讨论了扩张频率、表面活性剂浓度及疏水链长、无机盐和温度对表面扩张流变行为的影响,同时探讨了小分子表面活性剂与高分子表面活性剂表面扩张流变行为的区别以及小分子表面活性剂在气/液界面与液/液表面的扩张流变性的差异。大量研究表明,借助于界面流变性的测定不仅可以研究发生在界面上和界面附近的微观弛豫过程,而且可以探讨界面上超分子聚集体的形成,进而为乳状液和泡沫等分散体系的稳定性提供依据。 The applications of dilatational rbeological method in studying the aggregation behavior of surfactant at interface are systematically summarized based on our works. The effects of oscillating frequency, concentration and hydrophobic chain of surfactant, electrolyte and temperature on surface dilatational rheology are discussed. Meanwhile the difference in surface dilatational rheology between low molecular surfactant and macromolecular surfactant has been studied. In addition, de difference of low molecular surfactant on air/water and liquid/liquid interface is investigated. Many studies indicate that these studies not only can provide the microscopic relaxation of the interfacial film, but they also are used to probe the information of super molecular aggregate at interface, which is important to real emulsion and foam formation and stability.
出处 《化学通报》 CAS CSCD 北大核心 2009年第6期507-515,共9页 Chemistry
基金 山东省科技重大专项项目(2005GG2107002)资助
关键词 表面活性剂 聚集作用 界面 扩张流变 Surfactant, Aggregation, Interface, Dilational rheology
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