Issue 36, 2007
From the journal:

Journal of Materials Chemistry

New magnetorheological fluids based on magnetic fibers

Modesto T. López-López,*a   Grigory Vertelov,b   Georges Bossis,a   Pavel Kuzhira  and  Juan D. G. Duránc  

* Corresponding authors

a Laboratoire de Physique de la Matière Condensée, CNRS UMR 6622 Université de Nice, Parc Valrose, 06108 Nice Cedex 2, France
E-mail: lopezlop@unice.fr
Fax: +33 4 92076536

b Laboratory of Organic Catalysis, Moscow State University, Vorob'yovy Gory, 119899 Moscow, Russia

c Department of Applied Physics, Campus de Fuentenueva s/n, Faculty of Sciences, University of Granada, 18071 Granada, Spain

Abstract

In this work, we report the synthesis under the presence of external magnetic fields of two types of magnetic microfibers: (i) cobalt wires; and (ii) rigid filaments of chemically linked iron microspheres. Optical microscopy and scanning electron microscopy (SEM) were used for characterizing their shape and size. The effect of magnetic field intensity, mixing frequency and reagent concentration on the final size of the fibers was investigated. The particles were also characterized by means of energy dispersive X-ray spectroscopy (EDX). The magnetization curves of both the cobalt wires and the iron filaments were obtained and compared with those of cobalt spheres and iron spheres respectively. Finally, these magnetic fibers were used for the preparation of new smart composites by dispersing them in a liquid carrier. Interestingly, the suspensions of cobalt wires show a remarkable increase in the yield stress when compared to conventional (based on spherical particles) magnetorheological fluids.

Graphical abstract: New magnetorheological fluids based on magnetic fibers

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Article information

DOI
https://doi.org/10.1039/B705871C
Article type
Paper
Submitted
17 Apr 2007
Accepted
03 Jul 2007
First published
19 Jul 2007

J. Mater. Chem., 2007,17, 3839-3844

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New magnetorheological fluids based on magnetic fibers

M. T. López-López, G. Vertelov, G. Bossis, P. Kuzhir and J. D. G. Durán, J. Mater. Chem., 2007, 17, 3839 DOI: 10.1039/B705871C

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