THERMODYNAMICS OF NONIONIC POLYMER MICELLE ASSOCIATION

被引:201
作者
NAGARAJAN, R
机构
[1] Pennsylvania State Univ, Dep of, Chemical Engineering, University, Park, PA, USA, Pennsylvania State Univ, Dep of Chemical Engineering, University Park, PA, USA
来源
COLLOIDS AND SURFACES | 1985年 / 13卷 / 01期
关键词
SURFACE ACTIVE AGENTS - THERMODYNAMICS;
D O I
10.1016/0166-6622(85)80002-0
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A quantitative treatment is developed to describe the competitive equilibria of micellization and formation of polymer - micelle complexes in aqueous solutions. The complexation of nonionic polymer with anionic and nonionic surfactants and their binary mixtures is examined. The model assumes that the presence of the polymer decreases the positive free energy of formation of the micelle - water interface on the one hand, while increasing the positive free-energy change arising from the steric repulsions at the micellar surface on the other. The relative importance of the above two effects determines the occurrence of polymer - micelle complexes. On this basis, the formation of polyethylene-oxide - sodium-diodecyl-sulfate (POE-SDS) micelle complex and the absence of POE - Triton X-100 micelle complex are explained.
引用
收藏
页码:1 / 17
页数:17
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