Time-resolved quasi-elastic laser scattering study demonstrating heterogeneity of interfacial tension at the water/nitrobenzene interface after introduction of sodium alkylsulfate.
Time-resolved quasi-elastic laser scattering study demonstrating heterogeneity of interfacial tension at the water/nitrobenzene interface after introduction of sodium alkylsulfate.
复制标题
时间分辨准弹性激光散射研究证明引入烷基硫酸钠后水/硝基苯界面处的界面张力不均匀。
DOI：
10.1016/j.jcis.2010.05.081
复制
发表时间：
2010
影响因子：
9.9
通讯作者：
M. Fujinami
中科院分区：
文献类型：
--
作者：
T. Toyota;Takahiro Kimura;K. Miyoshi;M. Fujinami
当烷基硫酸钠水溶液通过毛细管引入界面时，水-硝基苯两相体系的界面呈现快速的翻转运动和切向流动，即所谓的Marangoni对流，并伴随着界面电势的脉冲式变化。虽然通常认为Marangoni对流是由界面张力的非均质性引起的，但尚未直接测量到该体系的界面张力的非均质性。在这里，我们用时间分辨的准弹性激光散射法，时间分辨率为200ms，跟踪了水/硝基苯界面张力的时间过程，并首次证明了界面张力的非均匀的实验证据。此外，我们还发现，界面张力在1s内恢复了均一性，在有电解液存在的情况下，表面活性剂分子被界面切向流输送后立即被均匀地吸附在界面上，而在没有电解液的情况下，表面活性剂分子只分布在体相中。
The interface of a biphasic system of water and nitrobenzene exhibits a rapid flip motion and a tangential flow, so-called Marangoni convection, accompanying a pulse-like change of interfacial electrical potential when an aqueous solution of sodium alkylsulfate is introduced to the interface through a capillary. Although it is conventionally known that the Marangoni convection is triggered by heterogeneity of the interfacial tension, the heterogeneity of the interfacial tension of this system has not been directly measured. Here, we employed a time-resolved quasi-elastic laser scattering method with a time resolution of 200ms to trace the time course of the interfacial tension at the water/nitrobenzene interface, and we demonstrated the first experimental evidence for the heterogeneity of the interfacial tension. Moreover, we found that the homogeneity of interfacial tension was restored within 1s and that, in the presence of an electrolyte in the water phase, the surfactant molecules were homogeneously adsorbed on the interface immediately after they were conveyed by the tangential flow at the interface, whereas in the absence of electrolyte, the surfactant molecules were distributed only in the bulk phases.
登录
查看更多内容
Toshinori Morisaku、Hiroharu Yui、Masanori Iwazumi、Yasuhiro Ikezoe、Masanori Fujinami、Ttsuguo Sawada：“实时观察磷脂膜酶促反应的时间分辨准弹性激光散射方法的应用”分析
DOI：
--
发表时间：
--
期刊：
影响因子：
--
作者：
通讯作者：
--
油滴的李斯特菌样运动
DOI：
--
发表时间：
2006
期刊：
Chemistry Letters 35
影响因子：
--
作者：
Toyota;T.;et. al.
通讯作者：
et. al.
使用烷基硫酸钠系统直接观察水/硝基苯界面的化学振荡
DOI：
--
发表时间：
2004
期刊：
ANALYTICAL SCIENCES 20
影响因子：
--
作者：
Ikezoe Y;Ishizaki S;Yui H;Fujinami M;Sawada T.
通讯作者：
Sawada T.
水/硝基苯界面处的流体动力诱导化学振荡
DOI：
--
发表时间：
2004
期刊：
JOURNAL OF COLLOID AND INTERFACE SCIENCE 275
影响因子：
--
作者：
Ikezoe Y;Ishizaki S;Takahashi T;Yui H;Fujinami M;Sawada T
通讯作者：
Sawada T
影响因子：
15
作者：
Hanczyc, Martin M.;Toyota, Taro;Sugawara, Tadashi
通讯作者：
Sugawara, Tadashi