磁性聚苯乙烯(Fe_3O_4/PS)微球合成的影响因素分析  

Analysis of influence factors on synthesis of magnetic polystyrene (Fe_3O_4/PS) micro-spheres

作　　者：杜雪岩[1,2] 耿丽平[1] 陈尹泽[1] 马应霞[1,2] 

机构地区：[1]兰州理工大学甘肃省有色金属新材料重点实验室,甘肃兰州730050 [2]兰州理工大学有色金属合金及加工教育部重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2010年第1期28-31,共4页Journal of Lanzhou University of Technology

基　　金：甘肃省中青年自然科学基金(3YS061-A25-025);兰州理工大学博士基金(SB01200602)的资助

摘　　要：以共沉淀法制备的Fe3O4纳米颗粒作为磁核,用聚乙二醇(PEG)为分散剂,过氧化苯甲酰(BPO)为引发剂,苯乙烯为单体,在乙醇/水混合溶剂中,采用分散聚合法制备出聚苯乙烯磁性高分子微球.研究聚合温度、Fe3O4用量、引发剂用量、分散剂用量以及乙醇/水比例等反应条件对聚合物磁性微球粒径和磁性能的影响,找出的最佳工艺参数为:单体用量为15 mL,Fe3O4用量为0.5 g,引发剂与单体的质量比为10∶1 000,醇水体积比为45/50,分散剂PEG用量为25 g,最佳反应温度为75℃.Taking Fe3O4 nanoparticles synthesized with chemical coprecipitation as magnetic kernel, polyethylene glycol （PEG） as dispersant, benzoperoxide （BPO） as initiator, and styrene as monomer, the magnetic polystyrene microspheres （MPM） were synthesized via a dispersion-polymerization method in ethanol-water solution. The influence of polymerization temperature and dosages of Fe3O4, initiator, dispersant, and composition of ethanol-water solution on the size and magnetism of MPM. It was found that the optimal technological parameters were as follows： 15 ml of monomer, 0. 5 g of Fe3O4, 10‰ of mass ratio of initiator to monomer, 45/50 of the volume ratio of ethanol to water, 25 g of PEG, and reaction temperature of 75 ℃.

关 键 词：FE3O4纳米颗粒 聚苯乙烯 磁性微球 

分 类 号：TB383[一般工业技术—材料科学与工程]