油水界面附近的破坏双电层与离子电荷分离
Destructed double-layer and ionic charge separation near the oil-water interface
摘要：
我们研究悬浮液的疏水带电胶体球分散在分层的油-水混合物通过修改后的泊松-玻尔兹曼理论，考虑到图像电荷效应和分区的一价离子。我们发现，离子对油的厌恶可以破坏油分散胶体的双层。这影响了胶体吸附到油-水界面的盐浓度依赖性定性。该理论还预测了一个狭窄的范围内的油介电常数，其中微米级的油包水液滴获得足够的电荷结晶在体积分数小到$\sim 10^{-3}$在没有胶体。这些发现解释了最近的观察结果[M. E。Leunissen { \em等人}，Proc. Nat. Ac. Sci { \bf 104}，2585（2007）]。
英文摘要：
We study suspensions of hydrophobic charged colloidal spheres dispersed in a demixed oil-water mixture by means of a modified Poisson-Boltzmann theory, taking into account image charge effects and partitioning of the monovalent ions. We find that the ion's aversion for oil can destroy the double layers of the oil-dispersed colloids. This affects the salt-concentration dependence of the colloidal adsorption to the oil-water interface qualitatively. The theory also predicts a narrow range of the oil-dielectric constant in which micron-sized water-in-oil droplets acquire enough charge to crystallize at volume fractions as small as $\sim 10^{-3}$ in the absence of colloids. These findings explain recent observations [M.E. Leunissen {\em et al.}, Proc. Nat. Ac. Sci {\bf 104}, 2585 (2007)].
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
