Effect of Alkyl Chain Length on the Interfacial Dilational Properties of Hydroxy-Substituted Alkyl Benzenesulfonates
Effect of Alkyl Chain Length on the Interfacial Dilational Properties of Hydroxy-Substituted Alkyl Benzenesulfonates
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烷基链长对羟基取代烷基苯磺酸盐界面扩张性能的影响
DOI：
10.1080/01932691.2016.1140057
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发表时间：
2016-01
影响因子：
2.2
通讯作者：
Zhao Sui
中科院分区：
文献类型：
--
作者：
Wu Xiao-Lin;Chu Yan-Ping;Huang Yu-Ping;Xu Zhi-Cheng;Zhang Lei;Zhang Lu;Zhao Sui
研究了2-羟基-3，5-二辛基苯磺酸钠（C8 C8）、2-羟基-3-辛基-5-癸基苯磺酸钠（C8 C10）和2-羟基-3-辛基-5-十二烷基苯磺酸钠（C8 C12）在空气-水和癸烷-水界面上形成的吸附层的扩张流变行为。的浓度和频率（0.002-0.1 Hz）的函数的振荡气泡/液滴法进行了研究。实验结果表明，羟基取代烷基苯磺酸盐的扩张模量明显高于普通表面活性剂，这是由于C8 C8分子在界面上的独特排列大大改善了烷基链间的界面相互作用。但由于癸烷分子会嵌入吸附在界面上的表面活性剂分子中，破坏了烷基链之间的相互作用，因此癸烷-水界面处的模量远低于表面处的模量。随着5-烷基碳原子数的增加，表面活性剂分子在表面的取向由平行变为倾斜，表面扩张模量降低。另一方面，扩散-交换过程主导界面行为，界面模量随着烷基链长度的增加而提高。图形摘要
Dilational rheological behaviors of adsorption layers of three surfactants, sodium 2-hydroxy-3,5-dioctyl benzene sulfonate (C8C8), sodium 2-hydroxy-3-octyl-5-decyl benzene sulfonate (C8C10), and sodium 2-hydroxy-3-octyl-5-dodecylbenzenesulfonate (C8C12) formed at air–water and decane–water interfaces, have been investigated as a function of concentration and frequency (0.002–0.1 Hz) by the oscillating bubble/drop method. The experimental results show that the dilational moduli of hydroxy-substituted alkyl benzenesulfonates are obviously higher than those of the common surfactants, because the interfacial interactions between alkyl chains are improved drastically by the unique arrangement of C8C8 molecules at the interface. However, the moduli at the decane–water interface are much lower than those at the surfaces because decane molecules will insert into the surfactant molecules adsorbed at the interface and destroy the interactions between alkyl chains. With an increase in the number of carbon atom of 5-alkyl, the surface dilational modulus decreases because the orientation of the surfactant molecules at the surface varies from parallel to tilt. On the other hand, the diffusion-exchange process dominates the interfacial behavior and the interfacial modulus improves with the increase in the length of the alkyl chain. GRAPHICAL ABSTRACT
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DOI：
10.1016/s0927-7757(00)00464-7
发表时间：
2000-12
期刊：
Colloids and Surfaces A: Physicochemical and Engineering Aspects
影响因子：
--
作者：
R. Wüstneck;D. Prescher;S. Katholy;G. Knochenhauer;L. Brehmer
通讯作者：
R. Wüstneck;D. Prescher;S. Katholy;G. Knochenhauer;L. Brehmer
影响因子：
15.6
作者：
F. Ravera;M. Ferrari;E. Santini;L. Liggieri
通讯作者：
F. Ravera;M. Ferrari;E. Santini;L. Liggieri
影响因子：
3.9
作者：
D. Taylor;R. Thomas;J. Penfold
通讯作者：
D. Taylor;R. Thomas;J. Penfold
影响因子：
3.3
作者：
Huang, Yu-Ping;Zhang, Lei;Yu, Jia-Yong
通讯作者：
Yu, Jia-Yong
影响因子：
2.4
作者：
Ma, Bao-dong;Zhang, Lei;Yu, Jia-Yong
通讯作者：
Yu, Jia-Yong