▎ 摘　　要

NOVELTY - Preparing high-efficiency two-dimensional nanomaterial and cellulose nanocrystalline composite filter film involves adding hexagonal boron nitride, graphite, molybdenum disulfide, glucose and corundum grinding ball into corundum ball milling tank, where corundum grinding ball is of two kinds, weight and diameter ratio are 10:1, average grain diameter of hexagonal boron nitride, graphite and molybdenum disulfide is 3-10 microns, and mass ratio is 1:1:1. The mass ratio of hexagonal boron nitride, graphite and molybdenum disulfide as a whole to corundum grinding ball is 22:1-50:1. The mass ratio of hexagonal boron nitride, graphene and molybdenum disulfide to glucose is 1:5. The corundum ball mill is rotated under protection of argon to obtain mixed powder of boron nitride nanosheets, graphene, molybdenum disulfide nanosheets and glucose. USE - Method for preparing high-efficiency two-dimensional nanomaterial and cellulose nanocrystalline composite filter film. ADVANTAGE - The method enables to prepare two-dimensional nanomaterial and cellulose nanocrystalline composite filter film with high efficiency. DETAILED DESCRIPTION - Preparing high-efficiency two-dimensional nanomaterial and cellulose nanocrystalline composite filter film involves adding hexagonal boron nitride, graphite, molybdenum disulfide, glucose and corundum grinding ball into corundum ball milling tank, where corundum grinding ball is of two kinds, weight and diameter ratio are 10:1, average grain diameter of hexagonal boron nitride, graphite and molybdenum disulfide is 3-10 microns, and mass ratio is 1:1:1. The mass ratio of hexagonal boron nitride, graphite and molybdenum disulfide as a whole to corundum grinding ball is 22:1-50:1. The mass ratio of hexagonal boron nitride, graphene and molybdenum disulfide to glucose is 1:5. The corundum ball mill is rotated under protection of argon to obtain mixed powder of boron nitride nanosheets, graphene, molybdenum disulfide nanosheets and glucose, where ball milling speed is 200-500 revolutions/minute (rpm), and ball milling time is 4-8 hours. The mixed powder of boron nitride nanosheets, graphene, molybdenum disulfide nanosheets and glucose is dispersed into deionized water by ultrasonication, and glucose in the mixed powder is removed through vacuum filtration to obtain boron nitride nanosheets, graphene and molybdenum disulfide nanosheet mixed powder. The mixed powder of boron nitride nanosheets, graphene and molybdenum disulfide nanosheets are dispersed in deionized water through ultrasound, and more than 100 layers of nanosheets are removed by high-speed centrifugation, where ultrasound duration is 1-3 hours, centrifugal speed 1000-3000 rpm, and centrifugal time is 10-50 minutes. The mixed powder of boron nitride nanosheets, graphene and molybdenum disulfide nanosheets with more than 100 layers of nanosheets removed at temperature of 80 degrees C is vaccum dried. The proper proportion of cellulose nanocrystalline is added to less than 100 layers of boron nitride nanosheet, graphene and molybdenum disulfide nano sheet of mixed powder, dispersed in deionized water by ultrasound, nylon film surface is passed through vacuum suction filtering method to obtain boron nitride nanometer sheet, graphene, nanometer sheet of molybdenum disulfide and cellulose nanocrystalline film, where ultrasonic time is 1-3 hours, and aperture of nylon film is 0.2 microns.