摘要
以马来酸酐和正十八醇为原料合成了可聚合表面活性剂马来酸单十八酯,并用其改性Fe3O4纳米磁粉。用改性纳米磁粉制备了苯乙烯基可聚合磁流体,并通过本体聚合获得了磁性纳米复合材料。透射电镜分析结果表明,直径约7nm的Fe3O4纳米颗粒在磁流体和复合材料中分散均匀,无明显团聚现象;红外光谱分析结果表明,磁粉表面包覆的马来酸单十八酯和苯乙烯基质发生了共聚。差示扫描量热、热重及凝胶渗透色谱分析结果表明,与相同条件聚合的聚苯乙烯(PS)相比,复合材料的玻璃化转变温度和去除磁粉后的相对分子质量明显降低,但热稳定性比相同条件下聚合的PS有明显提高,这说明可聚合表面活性剂和活性PS链之间形成了共价键,从而增强了Fe3O4纳米颗粒与基质的相互作用。
Surfaetants play a crucial role in preparation of organic/inorganic nano composites through surface modification of inorganic nano particles. Recently, polymerizable surfactants which contain reactive double bonds are attracting more and more scientific and industrial attention for their application in the fields of emulsion polymerization, nano materials preparation, ere, In this communication, monooctadecyl maleate as polymerizable surfactant synthesized by esterification of maleic anhydride and octadeeanol was used to surface-modify Fe3O4 nano particles. A polymerizable magnetic fluid was obtained by directly dispersing modified Fe3O4 nano particles into styrene and magnetic nano composite was prepared through free radical polymerization of polymerizable magnetic fluid.
出处
《合成橡胶工业》
CAS
CSCD
2009年第1期73-73,共1页
China Synthetic Rubber Industry
基金
Supported by the Natural Science Foundation of Guangdong Province (020891)
