Dilational surface visco-elasticity of polyelectrolyte/surfactant solutions: Formation of heterogeneous adsorption layers

被引：102
|
作者：
Noskov, B. A. [1 ]
Loglio, G. [2 ]
Miller, R. [3 ]
机构：
[1] St Petersburg State Univ, Dept Colloid Chem, St Petersburg 198904, Russia
[2] MPI Kolloid & Grenzflachenforsch, D-14424 Golm, Germany
[3] Univ Florence, Dipartimento Chim Organ, I-50019 Florence, Italy
来源：
ADVANCES IN COLLOID AND INTERFACE SCIENCE | 2011年 / 168卷 / 1-2期
关键词：
Polyelectrolyte/surfactant complexes; Dilational surface rheology; Dynamic surface elasticity; Dynamic surface tension; Relaxation processes in the surface layer; Nano-particles; SODIUM DODECYL-SULFATE; AIR-WATER-INTERFACE; OPPOSITELY CHARGED POLYELECTROLYTES; AIR/WATER INTERFACE; POLYMER-SURFACTANT; DODECYLTRIMETHYLAMMONIUM BROMIDE; NEUTRON REFLECTION; POLYMER/SURFACTANT INTERACTION; ANIONIC POLYELECTROLYTES; POLY(STYRENE SULFONATE);
D O I：
10.1016/j.cis.2011.02.010
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：
Recent application of the methods of surface dilational rheology to solutions of the complexes between synthetic polyelectrolytes and oppositely charged surfactants (PSC) gave a possibility to determine some steps of the adsorption layer formation and to discover an abrupt transition connected with the formation of microaggregates at the liquid surface. The kinetic dependencies of the dynamic surface elasticity are always monotonous at low surfactant concentrations but can have one or two local maxima in the range beyond the critical aggregation concentration. The first maximum is accompanied by the generation of higher harmonics of induced surface tension oscillations and caused by heterogeneities in the adsorption layer. The formation of a multilayered structure at the surface for some systems leads to the second maximum in the dynamic surface elasticity. The hydrophobicity and charge density of a polymer chain influence strongly the surface structure, resulting in a variety of dynamic surface properties of PSC solutions. Optical methods and atomic force microscopy give additional information for the systems under consideration. Experimental results and existing theoretical frameworks are reviewed with emphasis on the general features of all studied PSC systems. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：179 / 197
页数：19
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