▎ 摘　　要

NOVELTY - Graphite as raw material is subjected to oxidation-reduction process to obtain graphene, and the obtained graphene is dispersed in water or organic solvent to obtain graphene dispersion. A surface of the filter material is pretreated by uniformly spraying solution containing 3-aminopropyltriethoxysilane as coupling agent and ethanol in volume ratio of 1:3, the resultant filter material is immersed in or sprayed with the obtained graphene dispersion, and dried. The resultant material is washed using water or light solvent, and dried at 110 degrees C, to obtain bag-type dust collector. USE - Preparation of bag-type dust collector (claimed). DETAILED DESCRIPTION - Graphite as raw material is subjected to oxidation-reduction process to obtain graphene, and the obtained graphene is dispersed in water or organic solvent to obtain graphene dispersion. A surface of the filter material is pretreated by uniformly spraying solution containing 3-aminopropyltriethoxysilane as coupling agent and ethanol in volume ratio of 1:3, the resultant filter material is immersed or sprayed using the obtained graphene dispersion, and dried for 24 hours. The resultant material is washed using water or light solvent, and dried at 110 degrees C for 10 hours under vacuum oven, to obtain bag-type dust collector.