▎ 摘　　要

NOVELTY - Ultra-thin ultra-low shrinkage graphene polyimide thermal conductive film comprises 300-500 pts. wt. polyimide, 3-5 pts. wt. tert-butyl ((4-hydroxycyclohexyl)methyl)carbamate and 3-8 pts. wt. graphene. USE - Used as ultra-thin ultra-low shrinkage graphene polyimide thermal conductive film. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing an ultra-thin ultra-low shrinkage graphene polyimide thermal conductive film, comprising (i) adding diamine and dianhydride into a reaction kettle at room temperature, adding m-cresol under nitrogen protection, stirring uniformly, adding isoquinoline, heating to 180-200 degrees C, carrying out the reaction for 10-14 hours, cooling, pouring reaction solution into ethanol to precipitate to obtain polyimide resin, (ii) placing graphene in an organic solvent and adding ((4-hydroxycyclohexyl)methyl)carbamic acid tert-butyl ester, performing high temperature treatment by high shear disperser, pre-dispersing, the treatment temperature is 400-900 degrees C, (iii) stirring synthesized polyimide resin and treated graphene in a stirred reaction vessel, stirring at a speed of 1000-2000 revolutions/minute, and stirring for 1-3 hours to form a membrane liquid, (iv) hydraulically introducing membrane into a defoaming kettle, and removing the bubbles in the membrane liquid under vacuum, (v) placing defoamed membrane liquid in a casting machine and casting it to form a polyimide film having a uniform thickness, and (vi) placing polyimide film in an imidization furnace for imidization treatment, and processing by a winder and a slitter.