橡胶技术网

合成橡胶工业
CHINA SYNTHETIC RUBBER INDUSTRY
2009 Vol.32 No.1 P.73

橡胶技术网

可聚合表面活性剂在磁性纳米材料制备中的应用

李瑞雪  王文志  刘宝玉  徐美芸  章水化 

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7 nm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,与相间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.
关键词:可聚合表面活性剂;马来酸单十八酯;氧化铁纳米颗粒;聚苯乙烯;磁性纳米复合材料

Application of polymerizable surfactant in the preparation of magnetic nano composite

Li Ruixue(College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China)  Wang Wenzhi(College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China)  Liu Baoyu(College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China)  Xu Meiyun(College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China)  Zhang Yonghua(College of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,China) 

AbstractSurfactants play a crucial role in preparation of organic/inorganic nano composites through surface modification of inorganic nano parti-cles. Recently, polymerizable surfactants which contain reactive doub-le bonds are attracting more and more scientific and industrial attention for their application in the fields of emulsion polymerization, nano ma-terials preparation, etc. In this communication, monooctadecyl mal-eate as polymerizable surfactant synthesized by esterification of maleic anhydride and octadecanol was used to surface-modify Fe3O4 nano particles. A polymerizable magnetic fluid was obtained by directly dis-persing modified F3O4 nano particles into styrene and magnetic nano composite was prepared through free radical polymerization of polymer-izable magnetic fluid.

基金项目:Supported by the Natural Science Foundation of Guangdong Province(020891)
作者简介:Li Ruixue,doctoral student.
作者单位:李瑞雪(华南理工大学材料科学与工程学院,广东,广州,510640) 
     王文志(华南理工大学材料科学与工程学院,广东,广州,510640) 
     刘宝玉(华南理工大学材料科学与工程学院,广东,广州,510640) 
     徐美芸(华南理工大学材料科学与工程学院,广东,广州,510640) 
     章水化(华南理工大学材料科学与工程学院,广东,广州,510640) 

参考文献:

[1]章永化,陈守明,陈建化,等.纳米Fe3O4/聚苯乙烯均匀分散体系的制备及结构[J].高等学校化学学报,2003,24(9):1717-1720.
[2]Chen Shouming,Zhang Yonghua,Xiong Hongbing,et al.Structure and properties of Fe3O4 nano particle polystyrene composite[J].合成橡胶工业,2003,26(2):119.

收稿日期:2008年7月10日

出版日期:2009年1月15日

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