▎ 摘　　要

NOVELTY - The preparation of high electrical conductivity and high thermal conductivity bacterial cellulose/graphene composite paper, involves (1) dispersing bacterial cellulose in water to make slurry to obtain bacterial cellulose slurry, (2) mixing bacterial cellulose slurry with graphene dispersion, dispersant, thickener and plasticizer uniformly to obtain bacterial cellulose/graphene composite slurry, and dispersing graphene in water to obtain graphene dispersion, (3) coating and drying composite slurry to obtain composite paper, (4) soaking composite paper is soaked in mixed solution of water-soluble calcium salt calcium and dilute nitric acid for post-treatment, washing with water, and drying, (5) hot-pressing the dried composite paper to obtain bacterial cellulose/graphene composite paper with high electrical conductivity and high thermal conductivity. USE - Preparation of high electrical conductivity and high thermal conductivity bacterial cellulose/graphene composite paper (claimed). ADVANTAGE - The method enables preparing high electrical conductivity and high thermal conductivity bacterial cellulose/graphene composite paper by simple and economical process, enabling complete adhesion of graphene and controllable doping amount, the prepared composite paper has conductivity of 54644.81 S/meter, through-surface thermal conductivity of 2.846 W/mK, and planar thermal conductivity of 42.597 W/mK, and the composite paper ensures enhanced mechanical properties and is bendable and foldable. DETAILED DESCRIPTION - The preparation of high electrical conductivity and high thermal conductivity bacterial cellulose/graphene composite paper, involves (1) dispersing bacterial cellulose in water to make slurry to obtain bacterial cellulose slurry, (2) mixing bacterial cellulose slurry with graphene dispersion, dispersant, thickener and plasticizer uniformly to obtain bacterial cellulose/graphene composite slurry, and dispersing graphene in water to obtain graphene dispersion, (3) coating and drying composite slurry to obtain composite paper, (4) soaking composite paper is soaked in mixed solution of water-soluble calcium salt calcium and dilute nitric acid for post-treatment, washing with water, and drying, (5) hot-pressing the dried composite paper to obtain bacterial cellulose/graphene composite paper with high electrical conductivity and high thermal conductivity, where the concentration of bacterial cellulose slurry in step (1) is 0.4-1.5 wt.%, the content of bacterial cellulose in step (2) is 15-85 wt.% of the paper mass, the content of graphene is 10-81 wt.% of paper mass, the content of dispersant is 0.4-2 wt.% of the paper mass, the content of thickener is 1-7 wt.% of the paper mass and the content of plasticizer is 0.25-1.8 wt.% of the paper mass, and the paper includes bacterial cellulose, graphene, dispersant, thickener and plasticizer.