Intelligent polymer gels controlled by magnetic fields
Intelligent polymer gels controlled by magnetic fields
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DOI：
10.1007/s003960050017
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发表时间：
2000
影响因子：
2.4
通讯作者：
M. Zrínyi
中科院分区：
文献类型：
--
作者：
M. Zrínyi
在本文中，我们总结了电场和磁场对含有复杂流体作为溶胀剂的聚合物凝胶的流动性和形状的影响。通过将胶体大小的磁性颗粒引入化学交联的聚（N-异丙基丙烯酰胺）和聚（乙烯醇）水凝胶中，制备了磁敏凝胶珠和整体凝胶。研究了均匀场和非均匀场的影响。在均匀磁场中，凝胶珠形成直链状结构，而在非均匀磁场中，由于指向最高场强的磁泳力，珠聚集。这种对磁场敏感的凝胶能够快速、可控地改变形状，可以用来模拟肌肉收缩。
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.