High-thermal-conductivity polymer conductive ink and production process thereof

Abstract

The invention discloses high-thermal-conductivity polymer conductive ink. The high-thermal-conductivity polymer conductive ink comprises the following components in percentage: 20-80% of conductive functional unit, 1-30% of resin, 1-30% of solvent and 1-20% of additive, wherein the conductive functional unit comprises a conductive polymer and functional unit particles, wherein the conductive polymer content accounts for 60-99% of mass of the conductive functional unit and the content of functional unit particles account for 1-40% of mass of the conductive functional unit. According to the high-thermal-conductivity polymer conductive ink disclosed by the invention, the content of the conductive ink solid particles is reduced, the dispersion stability of the conductive ink is improved, and the universal process is imparted; and meanwhile, the functional unit particles act as both a conductive unit and a thermal conductive unit and thus both the high conductivity and high thermal conductivity are imparted.

Description

technical field [0001] The invention relates to a conductive ink, in particular to a polymer conductive ink with high thermal conductivity and a production process thereof. Background technique [0002] Traditional conductive inks are compounded by adding conductive unit powder to polymers. The conductive functional unit is the most critical component, mainly including carbon, metal or metal oxides, and conductive polymers. Gold, silver and copper paste inks have excellent conductivity, and the resistance value can reach 10 -2 ~l0 -3 Wcm; gold and silver inks have good performance, but are expensive, and silver itself has defects such as easy migration, vulcanization, poor resistance to solder erosion, and easy cracking during sintering. Under the action of air and water, copper paste ink will produce an oxide layer to make the conductivity unstable. The film layer of carbon paste ink is not easy to oxidize, and has stable performance. After curing, it is resistant to ac...

AI Technical Summary

Problems solved by technology

The characteristics of high electrical and thermal conductivity, the intrinsic stability of carbon materials, and nanostructures all determine that graphene and carbon nanotubes can be used as functional units to give inks high electrical and thermal conductivity, but unlike metal silver conductive inks, these nanocarbon systems There is a large interface resistance in the conductive unit, so that the conductivity that can be obtained is not high