Preparation and Performance of Graphene Oxide Modified Polyurethane Thermal Conductive Insulating Adhesive

A novel graphene oxide (GO) modified polyurethane thermal conductive insulating adhesive with small addition and excellent insulation properties was prepared by in-situ polymerization using GO as thermal conductive filler. The effects of GO content on the mechanical performance, thermal conductivity, thermal stability and insulation properties of the modified polyurethane adhesive were studied. The results showed that the tensile strength and elongation at break of polyurethane adhesive increased at first and then decreased with the increase of GO content. The thermal conductivity and thermal decomposition temperature of GO/PU composite adhesive can be effectively improved by adding appropriate amount of GO. The tensile strength, thermal conductivity and thermal decomposition temperature of polyurethane adhesive reached the maximum when GO content was 1.5 wt%. The novel GO-modified polyurethane adhesive exhibited good insulation property. The development of GO/PU thermal conductive adhesive will provide a facile method for effectively solving the “trade-off” problem between low filling and high thermal conductivity.