▎ 摘　　要

NOVELTY - Preparing air purification fiber filter involves forming graphene bottom material, mixing graphene and first deionized water to form slurry. The solid content of graphene in the slurry is 2-3 wt.%. The basic primer is added to the graphene primer. The second deionized water is added, stirred. The waterborne polyurethane is added, continue to stirred until the mixture is uniform to obtain the basic primer. The amount of the second deionized water is 10-50 wt.% of the graphene primer. The amount of the aqueous polyurethane is 1-4 times the sum of the weight of the graphene primer and second deionized water. The third deionized water is added to the mixture of diatomaceous earth and sepiolite, stirred until uniformly mixed to obtain first mixed solution. The diatomaceous earth and sepiolite are both nano-sized powders. The weight ratio of diatomaceous earth and sepiolite is 1:3-1:6. USE - Method for preparing air purification fiber filter. DETAILED DESCRIPTION - Preparing air purification fiber filter involves forming graphene bottom material, mixing graphene and first deionized water to form slurry. The solid content of graphene in the slurry is 2-3 wt.%. The basic primer is added to the graphene primer. The second deionized water is added, stirred. The waterborne polyurethane is added, continue to stirred until the mixture is uniform to obtain the basic primer. The amount of the second deionized water is 10-50 wt.% of the graphene primer. The amount of the aqueous polyurethane is 1-4 times the sum of the weight of the graphene primer and second deionized water. The third deionized water is added to the mixture of diatomaceous earth and sepiolite, stirred until uniformly mixed to obtain first mixed solution. The diatomaceous earth and sepiolite are both nano-sized powders. The weight ratio of diatomaceous earth and sepiolite is 1:3-1:6. The dosage of the third deionized water is 3-7 times the sum of the weight of diatomaceous earth and sepiolite. The formaldehyde absorption liquid is added to the first mixed liquid, and mixed to obtain second mixed liquid. The weight ratio of the first mixed solution to formaldehyde absorption solution is 4:1-2:1. The filter screen is prepared. The fourth deionized water is added to the negative ion powder, and mixed to obtain the third mixed liquid. The basic primer and the second mixed liquid are added to the third mixed liquid, mixed to obtain spray paint. The amount of the fourth deionized water is 3-8 times the weight of the negative ion powder. The amount of the base primer is 25-50 wt.% of the third mixed liquid. The amount of the second mixed liquid is 25-50 wt.% of the third mixed liquid. The paint is sprayed onto surface of the filter paper to form coating. The thickness of coating is controlled to 0.1-1 millimeter, after spraying is finished. The coated filter paper is baked at 60-100 degrees C for 1-3 minutes. The filter paper is prepared into fiber filter according to the conventional method to obtain final product.