▎ 摘　　要

NOVELTY - Tea residue graphene-copper-cerium-metal organic framework (MOF)-polyvinyl butyral (PVB) composite material is prepared from waste tea leaves, cerium-MOF and copper source materials. USE - The composite material is useful for preparing a heat conductive material and an anticorrosive paint (claimed), and for national defense undertakings. The heat conductive material such as heat conductive film is useful for heat conduction of electronic devices. ADVANTAGE - The composite material adopts waste and cost-effective raw materials, has simple, economical, safe and environmentally-friendly preparation process, which is suitable for continuous industrial production, and expands its application field. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the composite material, involving (i) preparing a PVB ethanol slurry, (ii) taking tea leaf residue dry powder, heating under nitrogen condition, cooling to obtain tea residue charcoal, adding potassium acetate, mixing, heating under nitrogen condition, and cooling to obtain tea residue graphene, (iii) take cerium-MOF, tea residue graphene and copper source material, thoroughly mixing, centrifuging and washing, where cerium-MOF changes from light yellow to grayish blue, adding dimethylacetamide, dimethyl sulfoxide (DMSO) and glucose, increasing the temperature for heating reaction, washing, centrifuging, and drying to obtain a tea residue graphene-copper-cerium-MOF composite, and (iv) thoroughly mixing the PVB ethanol slurry and the tea residue graphene-copper-cerium-MOF composite to obtain the finished composite material.