Stability of wetting films of F108 triblock copolymer aqueous solutions on quartz

被引：5
|
作者：
Esipova, NE [1 ]
Itskov, SV [1 ]
Churaev, NV [1 ]
机构：
[1] Russian Acad Sci, Inst Phys Chem, Leninskii Pr 31, Moscow 119991, Russia
来源：
COLLOID JOURNAL | 2002年 / 64卷 / 06期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1023/A:1021593904712
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：
Wetting films of nonionic F108 triblock copolymer aqueous solutions with concentrations below the CMC containing an electrolyte (NaCl) and formed on a quartz substrate are studied. Primary thick films are disclosed to be metastable. Their temporal stability is explained by the electrostatic repulsive forces. Film thinning and transition to a stable state occur slowly at low electrolyte concentrations (C-Nacl = 10(-5) and 10(-3) M, respectively) and instantly at its high concentrations (C-Nacl = 10(-2) and 10(-1) M, respectively). The stability of thin films is explained by the steric repulsive forces.
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页码：699 / 705
页数：7
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