Moghadam Tahereh Fereidooni, Azizian Saeid
Department of Physical Chemistry, Faculty of Chemistry, Bu-Ali Sina University, 65147, Hamedan, Iran.
Soft Matter. 2014 Sep 7;10(33):6192-7. doi: 10.1039/c4sm01027b. Epub 2014 Jul 10.
The present study reports the effects of non-ionic surfactant Pluronic F-127 on the equilibrium and dynamic oil-water interfacial tension in the presence of ZnO nanoparticles. The results show that in the presence of nanoparticles, the decrease of interfacial tension is more. The cooperative behavior of F-127 and ZnO nanoparticles especially at low concentrations increases the surfactant efficiency in lowering the interfacial tension. Statistical rate theory (SRT) and mixed diffusion-kinetic controlled model were used for modeling the dynamic interfacial tension data. The modeling results show that the mechanism of surfactant adsorption is controlled with the mixed diffusion-kinetic model. In addition, the influence of the solution pH on the interfacial tension was investigated. Finally, the effects of F-127 on the contact angle in the absence and presence of ZnO was compared.
本研究报告了非离子表面活性剂普朗尼克F - 127在氧化锌纳米颗粒存在下对油水界面平衡张力和动态张力的影响。结果表明，在纳米颗粒存在的情况下，界面张力的降低更为显著。F - 127与氧化锌纳米颗粒的协同作用，特别是在低浓度下，提高了表面活性剂降低界面张力的效率。采用统计速率理论（SRT）和混合扩散 - 动力学控制模型对动态界面张力数据进行建模。建模结果表明，表面活性剂吸附的机制受混合扩散 - 动力学模型控制。此外，还研究了溶液pH值对界面张力的影响。最后，比较了F - 127在有无氧化锌存在时对接触角的影响。
