▎ 摘　　要

NOVELTY - A low residual image polyimide comprises diamine monomer, alicyclic dianhydride monomer, additive containing piperidine group and graphene. The diamine monomer is a mixture of diamine monomer containing linear alkyl and N,N,N',N'-tetrakis(p-aminophenyl)p-phenylenediamine. USE - Low residual image polyimide used in liquid crystal alignment film (claimed). ADVANTAGE - The low residual image polyimide improves the voltage retention rate, alignment performance of the film, accumulation of ions and charges, and improves the liquid crystal residual image due to mutually matched three aspects. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of low residual image polyimide, which involves adding a diamine monomer containing linear alkyl and alicyclic dianhydride monomer into a solvent under an inert gas atmosphere, uniformly dispersing graphene, reacting, adding N,N,N',N'-tetrakis(p-aminophenyl)p-phenylenediamine, reacting, adding additive containing piperidine group and reacting.