Facile one-step fabrication of polymer microspheres with high magnetism and armored inorganic particles by Pickering emulsion polymerization
writer：Dezhong Yin, Xiao Du, Hao Liu, Qiuyu Zhang,Li Ma
keywords：Pickering emulsion; Magnetic microsphere; Particles-armored microsphere; Absorption energy
source：期刊
specific source：Colloids and Surfaces A: Physicochemical and Engineering Aspects
Issue time：2012年
Facile one-step Pickering emulsion polymerization was employed to prepare magnetic polymer microspheres with high magnetism and armored inorganic particles. Partially hydrophilic CTAB-modified Fe3O4 particles were employed as stabilizer of Pickering emulsion and were armored on the as-prepared microspheres, while totally hydrophobic oleic acid-modified Fe3O4 particles were encapsulated in the obtained microspheres. The microspheres were characterized by scanning electron microscopy (SEM), energy dispersive X-ray microanalyses (EDX) and magnetic measurements. Total Fe3O4, encapsulated Fe3O4 and armored Fe3O4 were detected and catalytic activity of microspheres for Fenton reaction was evaluated. The results showed that steady barrier formed by CTAB-modified Fe3O4 on droplet surface can prevent oleic acid-modified Fe3O4 from escaping away the polymerization vessel, which lead to an efficient encapsulation to oleic acid-modified Fe3O4. The encapsulated Fe3O4 enables the microspheres to be separated by external magnetic field and the armored Fe3O4 endows the composites with special catalytic property.
http://www.sciencedirect.com/science/article/pii/S0927775712005791