期刊
COLLOID AND POLYMER SCIENCE
卷 278, 期 2, 页码 98-103出版社
SPRINGER VERLAG
DOI: 10.1007/s003960050017
关键词
intelligent material; responsive gels; magnetic-field-sensitive polymer gel; artificial muscle
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 bends and monolith gels have been prepared by introducing magnetic particles of colloidal size into chemically cross-linked poly(N-isopropylacryl-amide) 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 aggregate due to the magnetophoretic farce 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.
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