Confinement-induced phase behavior and adsorption regulation of ionic surfactants in the aqueous film between charged solids
Confinement-induced phase behavior and adsorption regulation of ionic surfactants in the aqueous film between charged solids
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带电固体间水膜中离子表面活性剂的约束诱导相行为和吸附调节
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
W. Ducker
中科院分区：
文献类型：
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作者：
W. J. Lokar;L. Koopal;F. Leermakers;W. Ducker
吸附和缔合的自一致场理论被用来计算离子表面活性剂（C16P3+）对两个相同的、带负电的、微疏水的固体的吸附，这些固体被薄膜分开，浸入无限的1:1的水电解质储层中。这个理论明确地说明了短程的“化学”力以及静电和极化力。固体之间分离的变化导致相互作用能的变化，从而导致吸附表面活性剂的数量和组织（近端吸附）的变化。当固体之间的分离远远大于吸附层的厚度时，可以通过无限分离时的吸附来预测近端吸附的一般特征；吸附取决于每个表面是否高于或低于电荷补偿点（ccp）。在ccp点，固体加上被吸附的表面活性剂的净电荷为零。很少有其他离子…
Self-consistent field theory for adsorption and association is utilized to calculate the adsorption of an ionic surfactant (C16P3+) to two identical, negatively charged, slightly hydrophobic solids separated by a thin film and immersed in an infinite reservoir of aqueous 1:1 electrolyte. This theory explicitly accounts for short-ranged “chemical” forces as well as electrostatic and polarization forces. A change in the separation between the solids leads to a change in interaction energy, which leads to a change in both the amount and the organization of the adsorbed surfactant (proximal adsorption). When the separation between the solids is much greater than the thickness of the adsorbed layers, the general features of the proximal adsorption can be predicted from the adsorption at infinite separation; the adsorption depends on whether each surface is above or below the charge compensation point (ccp). At the ccp, the net charge of the solid plus the adsorbed surfactant is zero. There are few other ions a...