支链烷基苯磺酸钠溶液界面扩张流变性质研究  

Study on Interfacial Dilational Rheological Properties of Sodium Branched-alkyl Benzene Sulfonate Solutions

作　　者：江琴 陆紫灵 张磊[2] 朱焱 JIANG Qin;LU Zi-ling;ZHANG Lei;ZHU Yan(School of Science,Civil Aviation Flight University of China,Deyang 618307,China;Key Laboratory of Photochemical Conversion and Optoelectronic Materials,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;School of Chemistry,Chemical Engineering and Life Science,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]中国民用航空飞行学院理学院,德阳618307 [2]中国科学院理化技术研究所光化学转换与功能材料重点实验室,北京100190 [3]武汉理工大学化学化工与生命科学学院,武汉430070

出　　处：《武汉理工大学学报》2022年第2期15-20,43,共7页Journal of Wuhan University of Technology

基　　金：国家重点研发计划(2019YFA0708700)。

摘　　要：通过悬挂滴法研究了4种不同疏水链长的烷基苯磺酸钠的界面扩张流变性质,分析了吸附时间、振荡频率、溶液浓度对界面扩张模量和相角的影响趋势。结果表明:长烷基链能使烷基苯磺酸钠分子在低浓度下降低界面张力,但对高浓度下烷基苯磺酸钠分子在油水界面上的排布影响不大。4种支链烷基苯磺酸钠分子所形成的界面吸附膜的弹性均较强。随着振荡频率的增加,膜内分子间相互作用占主导,扩张模量升高,相角降低。随着疏水链长的增加,分子间相互作用增强,界面膜排列更加紧密,扩张模量极大值增大,相角则维持在较低数值。The interfacial rheological properties of four sodium alkyl benzene sulfonates with different hydrophobic chain length were analyzed via the drop shape analysis method.The effects of ageing time,dilational frequency,and bulk concentration on their interfacial dilational modulus and phase angle were explored.The results show that the long alkyl chain enables the sodium alkyl benzene sulfonate molecules to reduce the interfacial tension at low concentrations,but the long alkyl chain has little influence on the arrangement of sodium alkyl benzene sulfonate molecules at the oil-water interface when the solution is at high concentration.The interfacial adsorption films formed by the four branched-sodium alkyl benzene sulfonate molecules is elastic in nature.The increase of the dilational frequency results in the dominance of molecular interaction.Thus,the interfacial dilational modulus increases and the phase angle decreases.As the length of the hydrophobic chain increases,the molecular interaction enhances and the interfacial film packs closer.Moreover,the maximum dilational modulus increases while the phase angle remains a relatively low value.

关 键 词：支链烷基苯磺酸钠 界面 扩张模量 相角 

分 类 号：O647[理学—物理化学]