Direct observation of abrupt shape transition in ferrogels induced by nonuniform magnetic field

M. Zrínyi, L. Barsi, D. Szabó, H. G. Kilian

Research output: Contribution to journalArticle

101 Citations (Scopus)

Abstract

Unidirectional elongation of magnetic field sensitive polymer gels, called ferrogels, have been studied. In ferrogels, finely distributed colloidal particles having superparamagnetic behavior are incorporated into a swollen network. These particles couple the shape of the gel to the nonuniform magnetic field. Shape distortion occurs instantaneously and disappears when the external field is removed. A discontinuous elongation and contraction in response to infinite-small change in the external magnetic field has been observed and a theoretical interpretation based on coupled magnetic and rubber elastic properties is provided.

Original languageEnglish
Pages (from-to)5685-5692
Number of pages8
JournalThe Journal of Chemical Physics
Volume106
Issue number13
Publication statusPublished - Apr 1 1997

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nonuniform magnetic fields
elongation
gels
Magnetic fields
Elongation
Gels
rubber
magnetic fields
contraction
elastic properties
Rubber
Polymers
polymers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Direct observation of abrupt shape transition in ferrogels induced by nonuniform magnetic field. / Zrínyi, M.; Barsi, L.; Szabó, D.; Kilian, H. G.

In: The Journal of Chemical Physics, Vol. 106, No. 13, 01.04.1997, p. 5685-5692.

Research output: Contribution to journalArticle

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