PEDOT/石墨烯复合材料的制备及其抗静电性能研究

Preparation and Antistatic Property of PEDOT/Graphene Composites

采用原位聚合法,以氧化石墨烯(GO)为掺杂剂,将3,4-乙烯二氧噻吩(EDOT)原位聚合在氧化石墨烯的表面,制备了部分还原氧化石墨烯/聚3,4-乙烯二氧噻吩(rGO/PEDOT)导电复合材料。实验表明:当m(EDOT):m(GO)=1:1时制备的复合材料具有良好的水分散性,电导率为2.56S/cm。用全反射红外光谱和拉曼光谱对其结构进行了表征,并使用透射电镜(TEM)对复合材料在水中的分散性进行了表征。结果表明:PEDOT成功聚合在GO的表面上,且PEDOT的聚合使氧化石墨烯得到了部分还原。将复合材料作为导电填料加入到水性聚氨酯中,测试了涂层的抗静电性、机械性能和热稳定性,在添加量为10%时,涂层的综合性能较好,涂层表面电阻可达1.27×10~9Ω。

Conductive composites were prepared from EDOT （3,4-ethoxylene dioxy thio- phene） and oxide graphene （GO） by in situ polymerization, wherein, GO was used as a dopant and EDOT was used as a reductant, which could reduce some oxygen-containing groups on oxide graphene （rGO）. The optimal synthesis mass ratio of EDOT and GO was 1 ： 1, by which the prepared composite had good water dispersibility and conductivity （2. 56 S/cm）. The structure and water dispersibility of the composites were characterized by attenuated total re- flectance-Fourier transform infrared spectroscopy, Raman spectroscopy and transmission elec- tron microscopy. The results showed that the poly （3,4-ethylenedioxythiophene） （PEDOT） was successfully embedded on the surface of oxide graphene and the synthesis of the PEDOT reduced a part of oxide graphene. Finally, the composite was added as conductive filler to the waterborne polyurethane. The antistatic, mechanical and thermal properties of the coating were investigated. When the additive amount of the composite was 10%, the coating showed a better comprehensive performance and achieved a surface resistivity of 1.27×10^9Ω.