Effect of polyelectrolyte/surfactant combinations on the stability of foam films

被引:74
作者
Kristen, Nora [1 ]
von Klitzing, Regine [1 ]
机构
[1] Tech Univ Berlin, Inst Chem, Stranski Lab Phys & Theoret Chem, D-10623 Berlin, Germany
关键词
AIR-WATER-INTERFACE; SODIUM DODECYL-SULFATE; OPPOSITELY CHARGED POLYELECTROLYTES; SURFACTANT CHAIN-LENGTH; THIN LIQUID-FILMS; AIR/WATER INTERFACE; DISJOINING PRESSURE; STRUCTURAL FORCES; WETTING FILMS; NEUTRON REFLECTION;
D O I
10.1039/b917297a
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
What happens if polymers are added to a macroscopic foam or to foam films? This is an important question for many technical applications, but it is also important for materials and life science. This paper reviews the effect of the surface composition on the thickness and stability of aqueous foam films containing surfactants and polymers. The surfactant concentration is below the critical micellisation concentration (cmc) and the critical aggregation concentration (cac). The addition of polymers to foam films leads to the formation of surface active polymer/surfactant complexes or to depletion of polymers close to the interfaces, which has a strong effect on the film stability. The review mainly concentrates on the dilute polymer regime (below the overlap concentration c*), and results at the semi-dilute regime (above c*) are briefly reviewed. A principle concept for the relation between the surfactant/polymer combination and the film thickness and stability is developed. It allows the prediction, of whether an unstable Newton black film (NBF) or a stable common black film (CBF) will be formed.
引用
收藏
页码:849 / 861
页数:13
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