Department of Food Science and Nutrition, College of Biosystem Engineering and Food Science, Zhejiang University, Yuhangtang Road 866, 310058 Hangzhou, China; Department of Food Physics and Meat Science, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 21/25, 70599 Stuttgart, Germany.
Department of Food Physics and Meat Science, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 21/25, 70599 Stuttgart, Germany.
J Colloid Interface Sci. 2014 Mar 1;417:9-17. doi: 10.1016/j.jcis.2013.11.018. Epub 2013 Nov 18.
Polymers can be used to modulate the stability and functionality of surfactant micelles. The purpose of this study was to investigate the solubilization of an octane oil-in-water emulsion in mixtures of an anionic polymer (carboxymethyl cellulose) and anionic sodium dodecylsulphate (SDS), nonionic polyoxyethylene sorbitan monooleate (Tween 80) and cationic cetyltrimethylammonium bromide (CTAB) surfactant micelles using dynamic light scattering, microelectrophoresis and turbidity measurements. The results showed that the addition of anionic carboxymethyl cellulose accelerated octane solubilization in cationic CTAB and CTAB-Tween 80 micelles, but did not affect the solubilization behaviors of micelles that were nonionic and anionic. The surfactant-polymer interactions were also studied using isothermal titration calorimetry (ITC) to characterize different physiochemical interaction regions depending on surfactant concentration in surfactant-polymer systems. Upon octane solubilization in CTAB-carboxymethyl cellulose mixtures, shape transitions of polymer-micelle complexes may have taken place that altered light scattering behavior. Based on these results, we suggest a mechanism for oil solubilization in electrostatically-formed surfactant-polymer complexes.
聚合物可以用来调节表面活性剂胶束的稳定性和功能。本研究的目的是通过动态光散射、微电泳和浊度测量，研究阴离子聚合物（羧甲基纤维素）和阴离子十二烷基硫酸钠（SDS）、非离子聚氧乙烯山梨糖醇单油酸酯（吐温 80）和阳离子十六烷基三甲基溴化铵（CTAB）表面活性剂胶束混合物中辛烷在水包油乳液中的增溶情况。结果表明，阴离子羧甲基纤维素的加入加速了阳离子 CTAB 和 CTAB-吐温 80 胶束中辛烷的增溶，但不影响非离子和阴离子胶束的增溶行为。通过等温滴定量热法（ITC）研究表面活性剂-聚合物相互作用，以表征不同的物理化学相互作用区域，取决于表面活性剂-聚合物体系中的表面活性剂浓度。在 CTAB-羧甲基纤维素混合物中辛烷增溶时，聚合物-胶束复合物的形状转变可能发生，从而改变了光散射行为。基于这些结果，我们提出了一种在静电形成的表面活性剂-聚合物复合物中油增溶的机制。
