Intelligent polymer gels controlled by magnetic fields

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Abstract

In this paper we summarise the effects induced by electric and magnetic fields on the mobility and shape of polymer gels containing a complex fluid as a swelling agent. Magnetic-field-sensitive gel beads and monolith gels have been prepared by introducing magnetic particles of colloidal size into chemically cross-linked poly(N-isopropylacrylamide) and poly(vinyl alcohol) hydrogels. The influence of uniform and nonuniform fields has been studied. In uniform magnetic fields the gel beads form straight chainlike structures, whereas in nonhomogeneous fields the beads aggregates due to the magnetophoretic force directed to the highest field intensity. The ability of magnetic-field-sensitive gels to undergo quick, controllable changes in shape can be used to mimic muscular contraction.

Original languageEnglish
Pages (from-to)98-103
Number of pages6
JournalColloid and Polymer Science
Volume278
Issue number2
DOIs
Publication statusPublished - Jan 1 2000

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Keywords

  • Artificial muscle
  • Intelligent material
  • Magnetic-field-sensitive polymer gel
  • Responsive gels

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry

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