Analysis of chaining structures in colloidal suspensions subjected to an electric field / Bossis G.,Metayer C.,Zubarev A. // PHYSICAL REVIEW E. - 2007. - V. 76, l. 4, 1.

ISSN/EISSN:

1539-3755 / нет данных

Type:

Article

Abstract:

Structures formed by a colloidal suspension of silica particles in 4-methyl cyclohexanol have been analyzed in the presence of an electric field. The formation of chains of particles was detected using an elliptical mirror to collect scattered light and a nearly matched refractive index between particles and solvent. A numerical method has been developed to obtain the size distribution of chains and their kinetics of formation from the record of a two-dimensional map of scattered light. We have compared the experimental size distribution to the prediction of a statistical theory based on a minimization of the free energy of a gas of chains. This theory quite well reproduced the experimental results for small chains but overestimates the tail of the distribution at high field. A saturation of the average size of chains versus the electric field was observed experimentally instead of a continuous growth as would be expected from aggregation under dipolar forces. A kinetic model, taking into account both capture and escape rates of a particle at the extremity of a chain, was shown to reproduce well the experimental growth of the average size of chains with time.

Author keywords:

SMALL-ANGLE SCATTERING; DIPOLAR HARD-SPHERES; ELECTRORHEOLOGICAL FLUIDS; AGGREGATION KINETICS; PHASE-SEPARATION; PARTICLES; DYNAMICS

DOI:

10.1103/PhysRevE.76.041401

Web of Science ID:

ISI:000250621900063

Соавторы в МНС:

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Другие поля

Поле	Значение
Month	OCT
Publisher	AMER PHYSICAL SOC
Address	ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Language	English
Article-Number	041401
Keywords-Plus	SMALL-ANGLE SCATTERING; DIPOLAR HARD-SPHERES; ELECTRORHEOLOGICAL FLUIDS; AGGREGATION KINETICS; PHASE-SEPARATION; PARTICLES; DYNAMICS
Research-Areas	Physics
Web-of-Science-Categories	Physics, Fluids \& Plasmas; Physics, Mathematical
ResearcherID-Numbers	Zubarev, Adrey/B-4752-2014
Number-of-Cited-References	30
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	10
Journal-ISO	Phys. Rev. E
Doc-Delivery-Number	226XN