International Postgraduate institute "Excellence Polytech" of Kazakh National Technical University, Almaty, Kazakhstan.
International Postgraduate institute "Excellence Polytech" of Kazakh National Technical University, Almaty, Kazakhstan; Max-Planck Institute of Colloids and Interfaces, Potsdam, Germany.
Adv Colloid Interface Sci. 2014 Mar;205:87-93. doi: 10.1016/j.cis.2013.10.007. Epub 2013 Oct 12.
Stabilization of emulsions by mixed polyelectrolyte/surfactant systems is a prominent example for the application in modern technologies. The formation of complexes between the polymers and the surfactants depends on the type of surfactant (ionic, non-ionic) and the mixing ratio. The surface activity (hydrophilic-lipophilic balance) of the resulting complexes is an important quantity for its efficiency in stabilizing emulsions. The interfacial adsorption properties observed at liquid/oil interfaces are more or less equivalent to those observed at the aqueous solution/air interface, however, the corresponding interfacial dilational and shear rheology parameters differ quite significantly. The interfacial properties are directly linked to bulk properties, which support the picture for the complex formation of polyelectrolyte/surfactant mixtures, which is the result of electrostatic and hydrophobic interactions. For long alkyl chain surfactants the interfacial behavior is strongly influenced by hydrophobic interactions while the complex formation with short chain surfactants is mainly governed by electrostatic interactions.
混合聚电解质/表面活性剂体系稳定乳液是现代技术应用中的一个突出例子。聚合物与表面活性剂之间形成复合物取决于表面活性剂的类型（离子型、非离子型）和混合比例。复合物的表面活性（亲水-亲油平衡）是其在稳定乳液中效率的重要参数。在液体/油界面观察到的界面吸附性质或多或少与在水溶液/空气界面观察到的性质等效，然而，相应的界面扩张和剪切流变学参数差异非常显著。界面性质与支持聚电解质/表面活性剂混合物复合物形成的体相性质直接相关，这种复合物形成是静电和疏水相互作用的结果。对于长链烷基表面活性剂，界面行为受疏水相互作用强烈影响，而与短链表面活性剂的复合物形成主要受静电相互作用控制。
