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Wanfu Ma, Shuai Xu, Jumei Li, Jia Guo, Yao Lin and Changchun Wang Hydrophilic dual-responsive magnetite/PMAA core/shell microspheres with high magnetic susceptibility and ph sensitivity via distillation-precipitation polymerization Journal of Polymer Science Part A: Polymer Chemistry 49

Version of Record online: 27 APR 2011 | DOI: 10.1002/pola.24705

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Hydrophilic dual-responsive magnetite/PMAA core/shell microspheres were directly fabricated through encapsulating MPS-modified magnetite colloid nanocrystal clusters (MCNCs) with crosslinked poly(methacrylic acid) (PMAA) shell via distillation-precipitation polymerization. The experimental results indicated that the obtained composite microspheres had well-defined core/shell structure, high saturation magnetization value, and abundant surface carboxyl groups. These core/shell composite microspheres possess fairly good magnetic susceptibility and pH sensitivity. 108:

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