摘要
磁性高分子微球是一种新型的功能材料,一般是由无机磁性物质与有机高分子材料的复合而成,同时兼备无机物质的磁学性质和高分子材料的表面性质,在生物医药、分离工程、环境治理、隐身材料、催化剂等领域具有广泛的应用前景~[1,2]。目前,制备磁性聚合物粒子方法主要是乳液聚合法,即将磁性Fe_3O_4纳米粒子分散到含有单体的乳状液中,再在Fe_3O_4纳米粒子表面聚合单体形成磁性高分子微球~[3]。这种方法制备的磁性高分子微球表面残留大量表面活性剂,制约了磁性高分子微球在生物医药领域中的应用。因此,研究非乳液法制备磁性高分子微球,并探讨调控磁性高分子微球的大小、形貌和磁学性能具有重要的理论和实际意义。本文采用热聚法在Fe_3O_4纳米粒子表面聚合苯乙烯单体制备出磁性Fe_3O_4@PS微球,研究研究了聚合温度、苯乙烯单体用量、反应介质对Fe_3O_4@PS微球的形貌和尺寸影响,并测试了复合纳米材料的磁学性质。图1a为Fe_3O_4@PS高分子微球的SEM照片图,其粒径为70-100 nm,水接触角测试表明Fe_3O_4@PS微球为疏水性材料。
As a novel functional material, magnetic polymer nanoparticles have attracted much research interest due to their potential applications in biomedical, separating, environmental, stealth materials and catalysts. However, magnetic polymer nanoparticles obtained from emulsion polymerization method suffers from disadvantages related to the large number of remaining surfactants, which may prevent them from being used in large scale bioapplications. Therefore, the development of non-emulsion polymerization method is seriously considered. Herein, we present a thermal polymerization method for the synthesis of magnetic Fe_3O_4@PS nanoparticles.
引文
[1]Xuan,S.H.;Wang,Y.X.J.;Leung,K.C.F.;Shu,K.Y.J.Phys.Chem.C.2008,112(48):18804-18809.
[2]Zhong,W.;Liu,P.;Shi,H.G.;Xue,D.S.e XPRESS Polym.Lett.2010,4(3):183-187.
[3]Xu,H.;Cui,L.L.;Tong,N.H.;Gu,H.C.J.Am.Chem.Soc.2006,128(49):15582-15583.
