纳米银线/石墨烯复合材料对导电胶的性能影响研究

Effect of Silver Nanowires-Graphene Nanocomposites on Performance of Electrically Conductive Adhesive

摘要:

本文采用一步溶剂热法合成了纳米银线-石墨烯复合材料，通过X射线衍射仪（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和紫外可见光吸收（UV-Vis）对合成的复合材料进行结构及形貌的表征，并将复合材料与微米片状银粉、环氧树脂基体掺杂制备导电胶，在150 ℃下固化2 h后，对导电胶进行了导电性能和热稳定性能测试。结果表明：纳米银线-石墨烯复合材料会改善导电胶的导电性能，当在基体树脂中添加0.9 wt%的复合材料后，导电胶的体积电阻率达到最低值4.34 ? 10-4 Ω?cm，而且导电胶仍然保持着良好的热稳定性能。

Abstract:

In this study, silver nanowires-graphene nanocomposites (AgNWs-GNs) have been successfully fabricated via a facile solvothermal synthetic method. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and UV-Visible absorption spectra (UV-Vis) were employed to characterize the structure and morphology of the as-prepared nanocomposites. The electrically conductive adhesive (ECA) was prepared by mixing AgNWs-GNs, micro-sized Ag flakes and epoxy together. The electrical and thermal properties of ECAs were tested after cured at 150 ?C for 2 h. The results show the AgNWs-GNs have a profound influence on the improvement of the electrical conductivity of the ECAs. When the content of the AgNWs-GNs was 0.9 wt%, the ECAs have the lowest volume resistivity of 4.34 ? 10-4 Ω?cm. Moreover, the ECAs filled with AgNWs-GNs still possessed the great thermal stability.