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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Phase Diagram and Structures in Mixtures of Poly(styrenesulfonate anion) and Alkyltrimethylammonium Cations in Water: Significance of Specific Hydrophobic Interaction
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Phase Diagram and Structures in Mixtures of Poly(styrenesulfonate anion) and Alkyltrimethylammonium Cations in Water: Significance of Specific Hydrophobic Interaction

机译：水中聚苯乙烯磺酸根阴离子和烷基三甲基铵阳离子混合物的相图和结构：特定疏水相互作用的意义

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摘要

Mixtures of polyelectrolytes and oppositely charged surfactants show very rich phase behavior that is influenced by surfactant—ion and polyion properties and by water content. A general feature is associative phase separation as a result of strong electrostatic interactions, whereas the effect of eventual more specific interactions (e.g., hydrophobic) has not been thoroughly investigated. In this paper, we report a detailed study on phase behavior and structures in poly-(styrenesulfonate anion) (PSS~)—cetyltrimethylammonium cation (CTA~+)— water mixtures that are characterized by a hydrophobic interaction between the styrene groups of PSS~- and the micelle interior. Structures of various phases were determined by small-angle X-ray scattering, and results indicated the presence of a disordered micellar and an ordered hexagonal phase; no cubic phase was found. The general conclusion is that the highlighted hydrophobic interaction promotes dissolution of CTAPSS when the polyion salt is added and provides further stabilization of the dense phase when the surfactant salt is added.
机译：聚电解质和带相反电荷的表面活性剂的混合物显示出非常丰富的相行为，这受表面活性剂离子和聚离子特性以及水含量的影响。一般特征是强静电相互作用的结果，缔合相分离，而最终更具体的相互作用（例如疏水性）的影响尚未得到充分研究。本文中，我们对聚（苯乙烯磺酸根阴离子）（PSS〜）-鲸蜡基三甲基铵阳离子（CTA〜+）-水混合物的相行为和结构进行了详细研究，该混合物的特征在于PSS〜的苯乙烯基团之间存在疏水相互作用-和胶束内部。通过小角X射线散射确定各种相的结构，结果表明存在无序的胶束和有序的六方相。未发现立方相。总的结论是，当加入聚离子盐时，突出的疏水相互作用促进了CTAPSS的溶解，当加入表面活性剂盐时，致密相进一步稳定。

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