Aggregation and disaggregation dynamics of sedimented and charged superparamagnetic micro-particles in water suspension

被引：26
作者：
Dominguez-Garcia, P. [1 ]
Pastor, J. M. [2 ]
Rubio, M. A. [3 ]
机构：
[1] Univ Nacl Educ Distancia, Dep Fis Mat, Madrid 28040, Spain
[2] UPM, EUIT Agr, Dep Ciencia & Tec Apl IT Agr, Madrid 28040, Spain
[3] Univ Nacl Educ Distancia, Dep Fis Fundamental, Madrid 28040, Spain
来源：
EUROPEAN PHYSICAL JOURNAL E | 2011年 / 34卷 / 04期
关键词：
ELECTRIC-FIELD; PROFILES; CHAINS; PARTICLES; COLLOIDS;
D O I：
10.1140/epje/i2011-11036-5
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：
This article presents results on the aggregation and disaggregation kinetics on a 1 mu m diameter charged superparamagnetic particles dispersed in water under a constant uniaxial magnetic field in experiments with salt (KCl) added to the suspension in order to observe the behaviour of the system when the electrical properties of the particles have been screened. These particles have an electric charge and are confined between two separated 100 mu m thick quartz windows, and sediment near the charged bottom wall. The electrostatic interactions that take place in this experimental setup may affect the micro-structure and colloidal stability of the suspension and thus, the dynamics of aggregation and disaggregation.
引用
收藏
页数：7
相关论文
共 36 条
[1]   MAGNETOVISCOSITY OF MICRONIC SUSPENSIONS [J].
BOSSIS, G ;
MATHIS, C ;
MIMOUNI, Z ;
PAPARODITIS, C .
EUROPHYSICS LETTERS, 1990, 11 (02) :133-137
[2]   Kinetics of sedimentation in colloidal suspensions [J].
Buzzaccaro, Stefano ;
Tripodi, Antonio ;
Rusconi, Roberto ;
Vigolo, Daniele ;
Piazza, Roberto .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2008, 20 (49)
[3]   Effects of Water Dissociation and CO2 Contamination on the Electrophoretic Mobility of a Spherical Particle in Aqueous Salt-Free Concentrated Suspensions [J].
Carrique, Felix ;
Ruiz-Reina, Emilio .
JOURNAL OF PHYSICAL CHEMISTRY B, 2009, 113 (25) :8613-8625
[4]  
Cernák J, 2004, PHYS REV E, V70, DOI 10.1103/PhysRevE.70.031504
[5]   Agglomeration of magnetic particles and breakup of magnetic chains in surfactant solutions [J].
Chin, CJ ;
Yiacoumi, S ;
Tsouris, C .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2002, 204 (1-3) :63-72
[6]   Three-dimensional morphology of field-induced chain-like aggregates of superparamagnetic microparticles [J].
Dominguez-Garcia, P. ;
Rubio, M. A. .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2010, 358 (1-3) :21-27
[7]   JChainsAnalyser: an ImageJ-based stand-alone application for the study of magneto-rheological fluids [J].
Dominguez-Garcia, P. ;
Rubio, M. A. .
COMPUTER PHYSICS COMMUNICATIONS, 2009, 180 (10) :1956-1960
[8]   Electrostatic and hydrodynamics effects in a sedimented magnetorheological suspension [J].
Dominguez-Garcia, P. ;
Pastor, J. M. ;
Melle, Sonia ;
Rubio, Miguel A. .
PHYSICAL REVIEW E, 2009, 80 (02)
[9]   Morphology of anisotropic chains in a magneto-rheological fluid during aggregation and disaggregation processes [J].
Dominguez-Garcia, P. ;
Melle, Sonia ;
Rubio, M. A. .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 2009, 333 (01) :221-229
[10]   Scaling in the aggregation dynamics of a magnetorheological fluid [J].
Dominguez-Garcia, P. ;
Melle, Sonia ;
Pastor, J. M. ;
Rubio, M. A. .
PHYSICAL REVIEW E, 2007, 76 (05)
1234