石墨烯/纳米银导电油墨导电性能研究

Conductivity of Graphene/Nano Ag Conductive Ink

目的制备出具有优异导电性能的石墨烯/纳米银复合材料,并作为导电填料,以提高导电油墨的导电性能。方法采用Hummers法制备氧化石墨烯,以葡萄糖作为还原剂,采用同步还原法制备石墨烯/纳米银,将石墨烯/纳米银复合物和纳米银按不同比例混合作为导电填料来制备导电油墨。通过透射电镜(TEM)、X射线衍射(XRD)、傅里叶变换红外(FTIR)光谱等分析测试方法表征了石墨烯/纳米银复合材料的微观结构和形貌,并通过四探针法对油墨的导电性进行检测。结果纳米银颗粒均匀地负载在石墨烯片层上,纳米银粒径约为35 nm;掺杂石墨烯/纳米银复合物质量分数为12%时,导电油墨的电阻率可达到1.08×10^(-7)?·m,导电性能提高约64%。结论制备的复合材料石墨烯呈片状,结构完好,添加到导电油墨中能明显提高导电性能。

The work aims to prepare graphene/Nano Ag composite with excellent conductivity and improve the conductivity of conductive ink as conductive filler. The method of Hummers was applied to prepare graphene oxide. With glucose as a reducing agent, the graphene/Nano Ag was prepared by synchronous reduction method. The graphene/Nano Ag composite and Nano Ag were mixed as conductive filler to prepare conductive ink in different proportions. By using TEM, XRD, FTIR spectrum and other testing technology, the micro-structure and morphology of the graphene/Nano Ag composite were characterized. The four probe method was used to detect the conductivity of the ink. The results showed that Nano silver particles uniformly dispersed on the graphene surface, and the size of Nano Ag particles was about 35 nm. When the mass fraction of graphene/Nano Ag composites was 12%, the resistivity of conductive ink could reach 1.08×10-7 ？·m, and the electrical conductivity could be increased by about 64%. The prepared composite graphene is flaky, and its structure is perfect. It can obviously improve the conductivity of conductive ink after added into the conductive ink.