Electrolytic Synthesis and Tolyltriazole Modification of Dendritic Silver Powders for High-performance Electrically Conductive Adhesives

摘要

Dendritic silver particles (DSPs) were synthesized by a facile electrolysis method based on the self-made silver methanesul-fonic as an electrolyte and the surface of DSPs was coated with methyl-1H-benzotriazole to prepare the surface-modified DSPs. Dendritic feature with a trunk and nano-branches is confirmed by scanning electron microscopy. At temperatures above 200°C, the sintering phenomenon is discovered at the nano- branches of DSPs. As the prepared DSPs are introduced into the commercial micron-scale silver particles-based electrically conductive adhesives (ECAs), the electrical resistivity can be significantly reduced to 5.63×10~5 Ω cm, which is superior to the traditional conductive adhesives derived from the pure micron-scale silver particles, implying the high application value of DSPs for high-performance conductive adhesive.