Colloidal motion in confined viscoelastic systems

被引：1

作者：

Haro-Perez, Catalina ^{[1
]}

Garcia-Castillo, Andres ^{[1
]}

Bonilla-Capilla, Beatriz ^{[1
]}

Luis Arauz-Lara, Jose ^{[1
]}

机构：

[1] Univ Autonoma San Luis Potosi, Inst Fis Manuel Sandoval Vallarta, San Luis Potosi 78000, Slp, Mexico

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2010年 / 361卷 / 1-3期

关键词：

Polyethylene oxide aqueous dispersions; Viscoelastic properties; Particle tracking; Confined systems; COMPLEX FLUIDS; POLY(ETHYLENE OXIDE); PARTICLE TRACKING; POLYMER MELTS; MICRORHEOLOGY; TRANSITION; DYNAMICS; MODULI;

D O I：

10.1016/j.colsurfa.2010.03.001

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：

In this work we report measurements of the effect of confinement on the motion of colloidal particles immersed in a confined viscoelastic fluid and on the mechanical properties of this medium. The fluid is a polymer solution in the semidilute regime, having colloidal particles dispersed within as probes. The mean squared displacement of the probes, determined by particle tracking using videomicroscopy, is used to determine the mechanical moduli of the fluid as it is confined. We find that both moduli, the elastic and the viscous, increase as confinement is more severe but the increment in the elastic modulus is proportionally larger. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：7 / 12

页数：6

共 25 条

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