Viscoelastic properties of silica nanoparticle monolayers at the air-water interface

被引：117
|
作者：
Zang, D. Y. [1 ,2 ]
Rio, E. [1 ]
Langevin, D. [1 ]
Wei, B. [2 ]
Binks, B. P. [3 ]
机构：
[1] Univ Paris 11, CNRS, Phys Solides Lab, UMR 8502, F-91405 Orsay, France
[2] Northwestern Polytech Univ, Lab Mat Sci Space, Xian 710072, Peoples R China
[3] Univ Hull, Dept Chem, Surfactant & Colloid Grp, Kingston Upon Hull HU6 7RX, N Humberside, England
来源：
EUROPEAN PHYSICAL JOURNAL E | 2010年 / 31卷 / 02期
关键词：
SHEAR; ELASTICITY; LAYERS;
D O I：
10.1140/epje/i2010-10565-7
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：
We have investigated the rheological behaviour of silica nanoparticle layers at the air-water interface. Both compressed and deposited layers have been studied in Langmuir troughs and with a bicone rheometer. The compressed layers are more homogeneous and rigid, and the elastic response to continuous, step and oscillatory compression are similar, provided the compression is fast enough and relaxation is prevented. The deposited layers are less rigid and more viscoelastic. Their shear moduli deduced from the oscillatory uniaxial compression are much smaller than those deduced from pure shear deformation suggesting that the effective shear rate is smaller than expected in the compression measurements.
引用
收藏
页码：125 / 134
页数：10
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