纳米银/石墨烯复合物对导电胶性能的影响

Effects of nano silver-graphene composites on the properties of electrically conductive adhesives

采用液相原位还原法制备了纳米银/石墨烯复合物,利用X射线衍射(XRD)、傅里叶变换红外(FT-IR)光谱、透射电镜(TEM)等测试技术表征了纳米银/石墨烯复合物的结构和形貌,并将纳米银/石墨烯复合物作为填料添加到银填充导电胶中,研究了其对导电胶性能的影响。结果表明:纳米银颗粒均匀分散于石墨烯表面,纳米银粒径约为30 nm;石墨烯呈卷曲的片状,且片层较薄;添加纳米银/石墨烯复合物后,导电胶的导电性能和导热性能均有明显提升。

Nano silver-graphene composites were prepared by the lipuid phase in-situ reduction of Ag ion and graphene oxide. X-ray diffraction （XRD）, Fourier transform infrared spectroscopy （FT-IR） and transmission electron microscope （TEM） were employed to characterize the structure and morphology of resulted composites. The composites were added into electrically conductive adhesives （ECAs） filled with silver flakes as conductive fillers to study their effect on properties of ECAs. Results show that the silver nanoparticles （about 30 rim） have a uniform distribution on the surface of thin graphene, and the morphology of graphene is curled and lamellar graphene is very thin. It is also found that the electrical and thermal properties of electrically conductive adhesives are significantly improved by the addition of the nano silver/graphene composites.