为了获得表面亲水性的磁性微球,在用微乳液法制备聚苯乙烯(PSt)的过程中,引入聚合单体甲基丙烯酸(MAA),得到P(St-MAA)磁性微球.通过光学显微镜、接触角测量仪、傅立叶红外测量仪和振动磁强计对该微球的性质进行了分析.结果表明该微球粒径大小分布在1～5μm之间,矫顽力和剩磁为0,具有很好的超顺磁性,表面含有羧基基团,与水珠的接触角为70°,表现出良好的亲水性.
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