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以化学共沉淀法制备Fe3O4纳米颗粒,以油酸为表面活性剂、苯乙烯为负载液制备可聚合磁流体,再经自由基聚合制备出了纳米Fe3O4/聚苯乙烯复合材料。TEM测试结果表明,表面处理的Fe3O4颗粒在聚苯乙烯基质中分散均匀,不发生团聚。DSC和TGA研究结果表明,虽然Fe3O4/聚苯乙烯均匀分散体系的玻璃化转变温度比聚苯乙烯的低,但少量Fe3O4纳米颗粒的存在使聚苯乙烯的起始、终止和最大热分解温度都有明显的提高。
The Fe3O4nanoparticles were prepared by chemical coprecipitation, and the polymerizable magnetic fluid was prepared by using oleic acid as surfactant and styrene as the carrier fluid. The Fe3O4 / polystyrene nanocomposite was prepared by free radical polymerization. TEM test results show that the surface treatment of Fe3O4 particles dispersed in the polystyrene matrix, no agglomeration. The results of DSC and TGA showed that although the glass transition temperature of Fe3O4 / polystyrene homogeneous dispersion was lower than that of polystyrene, the presence of a small amount of Fe3O4 nanoparticles made the onset, the termination and the maximum thermal decomposition temperature of polystyrene Significantly improved.