通过添加两亲性嵌段共聚物在水-油-表面活性剂体系中诱导共存的层状相。

Coexisting lamellar phases in water-oil-surfactant systems induced by the addition of an amphiphilic block copolymer.

作者信息

Frank Christian, Strey Reinhard, Schmidt Claudia, Stubenrauch Cosima

机构信息

Institut für Physikalische Chemie, Universität zu Köln, Luxemburger Str. 116, D-50939 Köln, Germany.

出版信息

J Colloid Interface Sci. 2007 Aug 1;312(1):76-86. doi: 10.1016/j.jcis.2006.06.043. Epub 2006 Jun 30.

DOI:10.1016/j.jcis.2006.06.043

PMID:17547928

Abstract

We report here a pioneering study using quadrupolar splitting NMR to detect new phases and phase compositions in the quasi-ternary microemulsion system water-decane-C(10)E(4)/PEP5-PEO5. The striking observation is that at certain compositions the polymer is apparently no longer incorporated into the membranes of the lamellar phase due to space restrictions. The polymer therefore induces a phase separation into two different lamellar phases L(alpha)(1) and L(alpha)(2) such that it fits into L(alpha)(1) while the excess surfactant forms a polymer-free L(alpha)(2) phase.

摘要

我们在此报告一项开创性研究，该研究使用四极分裂核磁共振来检测准三元微乳液体系水-癸烷-C(10)E(4)/PEP5-PEO5中的新相和相组成。引人注目的观察结果是，在某些组成下，由于空间限制，聚合物显然不再掺入层状相的膜中。因此，聚合物会诱导相分离成两个不同的层状相L(α)(1)和L(α)(2)，使得它适合进入L(α)(1)，而过量的表面活性剂则形成无聚合物的L(α)(2)相。