Abstract

Carbon nanotubes (CNTs) decorated with silver nanoparticles (AgNPs) are promising nanomaterials for improving the dielectric properties of polymer materials for energy storage and micro-capacitor applications. However, the cost of AgNPs limits their wide application. This work describes the synthesis of green silver nanoparticles (GAgNPs) from cashew leaves and their hybridization with CNTs. These new hybrid nanocomposites were developed by adding 0.1, 0.2, 0.3, 0.4 and 0.5% CNTs and 0.5% GAgNPs in an epoxy matrix. Electrical conductivity, dielectric constant, and capacitor raised as CNTs content increased from 0.1 to 0.5% with 0.5% GAgNPs. The high dielectric constant reported in this work was made possible because of the high electron mobility of GAgNPs, which helps to enhance the conductivity of the epoxy. The highest electrical conductivity and dielectric constant were obtained for hybrid nanocomposites based on 0.5% CNTs and 0.5% GAgNPs. It was established that GAgNPs modified CNTs can be used to enhanced the electrical conductivity, dielectric constant and capacitance of epoxy resins for isotropic conductive adhesives, assemblies, and electronic packaging applications.

摘要

用银纳米颗粒（AgNP）装饰的碳纳米管（CNT）是有望改善用于能量存储和微电容器应用的聚合物材料介电性能的纳米材料。然而，AgNP的成本限制了其广泛的应用。这项工作描述了从腰果叶合成绿色银纳米颗粒（GAgNPs）以及它们与CNT的杂交。这些新的杂化纳米复合材料是通过在环氧基质中添加0.1％，0.2％，0.3％，0.4％和0.5％的CNT和0.5％GAgNP来开发的。当碳纳米管含量为0.5％时，随着碳纳米管含量从0.1％增加到0.5％，电导率，介电常数和电容器会提高。由于GAgNPs的高电子迁移率，使这项工作中报道的高介电常数成为可能，这有助于提高环氧树脂的电导率。对于基于0.5％CNT和0.5％GAgNPs的杂化纳米复合材料，获得了最高的电导率和介电常数。已经确定，GAgNPs改性的CNT可用于增强用于各向同性导电胶粘剂，组件和电子包装应用的环氧树脂的电导率，介电常数和电容。