▎ 摘　　要

NOVELTY - Preparing graphene surface modified micron-level tourmaline negative ion release functional powder comprises adding graphene to potassium hydroxide solution, reacting at 60-120°C and pressure of 1-5 atmospheres for 2-8 hours, and obtained precipitate is porous graphene activator; using air flow process to crush the tourmaline, controlling the particle size distribution of the tourmaline powder to be 1-5 microns to obtain the tourmaline powder; mixing the graphene activator with tourmaline powder, adding a solvent, and carrying out the reaction at 60-100°C, obtaining micron-level composite material with negative ion emission function; where, the mass ratio of the graphene activator to the tourmaline powder is 1:10-1000. USE - The negative ion release functional powder is useful for preparation of polymer film material, and giving negative ion effect to carrier surface. ADVANTAGE - The negative ion release functional powder: is beneficial to increase friction and release electrons through graphene into air to combine with water vapor, with high release efficiency. has high excitation efficiency; controls particle size of tourmaline at micron level, can actively prevents agglomeration and improves the negative ion release efficiency of tourmaline. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: Product, is prepared by above mentioned method. Use of product in preparation of polymer film material, comprising mixing product and polymerizing into polymer, preparing film by hot pressing and drawing, negative ions are generated by friction, amount of negative ions generated is 6,000-26,000 per cubic centimeter. Use of product in giving negative ion effect to carrier surface, product is coated on surface of the carrier through the surface, and negative ions are generated by friction, the amount of negative ions generated is 6,000-26,000 per cubic centimeter.