无机/有机纳米复合材料及其导电导磁机理研究

The reduced graphene oxide is obtained by reducing the graphene oxide with reducing agents, and then the functionlized reduced graphene oxide is obtained after modifing reduced graphene oxide with organic modifiers. The Nano-Fe3O4 coated halloysite nanotubes are prepareted through coprecipitation method, and then the modified Fe3O4 / halloysite nanotubes are obtained through surface modification of halloysite nanotubes by coupling agents. The modified reduced graphene oxide and modified Fe3O4 / halloysite nanotubes are uniformly mixed and dispersed into N,N-Dimethylformamide. The inorganic/organic polymer nanocomposites are preparated through the reaction among modified reduced graphene oxide , modified Fe3O4 / halloysite nanotubes and organic polyuea matrix via in-situ polymerization. Polymerization process of the nanocomposites will be studied and the synthesis mechanism of nanocomposites will be revealed. The relationships between the surface microstructure ,active group and amount of reduced graphene oxide and electric conductivity of inorganic/organic polymer nanocomposites is studied ,and the effects of morphology structure, size dimension, particle size distribution and amount of modified Fe3O4 / halloysite nanotubes on the magnetization intensity and coercive force of norganic/organic nanocomposites are also studied. And the conductive mechanism and magnetic mechanism will be revealed,which will provide a theoretical guidance in this area.

将氧化石墨烯还原得到还原氧化石墨烯，然后对其改性，得到带有活性反应官能团的改性的还原氧化石墨烯。用共沉淀法将纳米Fe3O4负载在埃洛石纳米管上，并对其改性，得到表面官能团化的改性的Fe3O4/埃洛石纳米管。将改性的还原氧化石墨烯与改性的Fe3O4/埃洛石纳米管均匀分散于N,N-二甲基甲酰胺中，通过原位聚合法，使改性的还原氧化石墨烯和Fe3O4/埃洛石纳米管与聚脲反应，得到无机/有机纳米复合材料。研究无机/有机纳米复合材料的制备工艺，揭示无机/有机纳米复合材料的形成机理。研究还原石墨烯的表面微观结构、活性基团和添加量与无机/有机纳米复合材料导电性能的关系，揭示纳米复合材料的导电机理；研究改性Fe3O4/埃洛石纳米管形貌结构、尺寸大小、尺寸分布以及添加量对无机/有机纳米复合材料的饱和磁化强度以及矫顽力的影响，揭示无机/有机纳米复合材料的导磁机理，为该领域的研究提供理论指导。

具有导电性和磁性能的高分子纳米复合材料，是功能性复合材料研究的研究热点之一。制备导电和电磁性能的高分子复合材料的传统方法主要是将磁性纳米材料复合到导电高分子基质中。但随着电子组装行业、军工行业、电磁屏蔽材料等行业的快速发展，传统的导电/磁性高分子复合材料已很难满足行业发展的需求，对新型具有优异导电、导磁性能同时又兼具卓越的机械性能、粘接性能等的复合材料的需求越来越迫切。本项目将氧化石墨烯还原得到还原氧化石墨烯，然后对其改性，得到带有活性反应官能团的改性的还原氧化石墨烯。用共沉淀法将纳米Fe3O4负载在埃洛石纳米管上，并对其改性，得到表面官能团化的改性的Fe3O4/埃洛石纳米管。将改性的还原氧化石墨烯和Fe3O4/埃洛石纳米管与聚氨酯反应，得到无机/有机纳米复合材料。另外还制备了其他几种无机纳米复合材料，并与聚氨酯或丙烯酸酯反应得到几种不同的无机/有机纳米复合材料。研究所制得的几种无机/有机纳米复合材料具有优异的导电性和磁性能，有望在电子组装行业、军工行业、电磁屏蔽等领域得到应用。研究无机/有机纳米复合材料的制备工艺，揭示无机/有机纳米复合材料的形成机理。分别研究了几种无机纳米复合材料与不同无机/有机纳米复合材料粘接性能、导电性能的关系，揭示纳米复合材料的粘接机理和导电机理；研究了几种无机纳米复合材料与不同无机/有机纳米复合材料的饱和磁化强度以及矫顽力的影响，揭示无机/有机纳米复合材料的导磁机理，为该领域的研究提供理论指导。另外还研究了几种无机/有机纳米复合材料的吸波性能和抗菌性能。