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Preparation of thermosensitive magnetic particles by dispersion polymerization

✍ Scribed by Xiao Bin Ding; Zong Hua Sun; Guo Xiang Wan; Ying Yan Jiang

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
504 KB
Volume
38
Category
Article
ISSN
1381-5148

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✦ Synopsis

A new kind of thermosensitive magnetic particles with core / shell structure was prepared by copolymerization of styrene (St) and N-isopropylacrylamide (NIPAM) in the presence of Fe O magnetic fluid in ethanol / water medium. The particles 3 4 shrank above the lower critical solution temperature (LCST) of Fe O / P(St-NIPAM) and swelled below the LCST in water.

3 4

The effect of polymerization parameters such as initiator concentration and NIPAM / St ratio on particles was investigated. Higher initiator concentration formed larger Fe O / P(St-NIPAM) particles, and the particles size decreased as the 3 4 NIPAM / St ratio increased.

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