项目名称: 十六烷/水乳液内界面分子吸附动力学过程的非线性光学研究
项目编号: No.21273277
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 数理科学和化学
项目作者: 干为
作者单位: 中国科学院新疆理化技术研究所
项目金额: 80万元
中文摘要: 乳液/微乳液中微纳米尺寸球形液滴与连续相之间的界面在自然界和工业过程中普遍存在。该类界面的分子结构和传输等过程对乳液的特性具有极大的影响。同时,由于对这些界面的分子层次探测的实验数据的缺乏,目前对此类界面上的分子吸附和传输等动力学过程的认识还有待进一步的拓展。本研究拟结合申请人前期应用非线性光谱学技术进行胶体界面研究工作的基础,使用具有界面选择性的二次谐波技术,对十六烷-水混合体系中的水包油微乳液滴界面上一系列具有不同电荷特征的分子和离子的吸附行为进行探测。结合对这些分子和离子在水/十六烷界面(平面)的吸附动力学特征的测量和分析,总结它们在两种具有不同几何结构的液-液界面上吸附行为的规律及其异同,并从分子/离子相互作用的角度分析其存在的根本原因。本研究可加深对乳液中液-液界面的分子层次的认识。
中文关键词: 乳液;界面;分子吸附;二次谐波;动力学
英文摘要: The interfaces between the micro-nano sized spherical droplets and the continuous phase in the emulsions/microemulsions commonly exist in natural environment and industry processes. The properties of the emulsions are normally greatly influenced by the structure and transportation of molecules and ions on this type of interfaces. However, due to the lack of the molecular level information from experimental measurement, the understanding on the adsorption and transportation of molecules on these interfaces is now limited and warrant further studies. Based on my previous studies on the interfaces in colloids system with nonlinear spectroscopic technique, in this research, the adsorption dynamics of molecules/ions with different charges on the interface of micro droplet in oil-in-water (hexadecane/water) emulsion are to be studied with surface specific Second Harmonic Generation technique. Combined with the study on the adsorption dynamic processes of these molecules/ions on the water-hexadecane interface (macro scale plane interface), we plan to compare the similarity and difference of the adsorption processes on these interfaces with different geometric structure and analyze the reason of these similarities/differences based on the interactions between molecules/ions. This research is expected to provide molecula
英文关键词: emulsion;interface;molecular adsorption;second harmonic generation;dynamics