An antibacterial air filter membrane based on polyacrylonitrile/graphene oxide/tea polyphenol composite and its preparation method

Abstract

The invention discloses an antibacterial air filter membrane based on a polyacrylonitrile / graphene oxide / tea polyphenol compound. The antibacterial air filter membrane takes a non-woven fabric as a base material, and a composite membrane formed by the polyacrylonitrile / graphene oxide / tea polyphenol compound is deposited on the surface of the base material; the mass ratio of polyacrylonitrile to graphene oxide to tea polyphenol is (16 to 30) : (4 to 10) : (1 to 16). Meanwhile, the invention provides a corresponding preparation method. A microscopic structure of the antibacterial air filter membrane provided by the invention is as follows: polyacrylonitrile (PAN) nano-fibers form a staggered net-shaped structure aggregate, and the diameter is about 50 to 300nm; the graphene oxide (GO) is dispersed between the PAN fibers and between crossed points of the fibers; the diameter distribution of the GO is relatively great, and is in a micron grade; a structure that the nano-fibers is combinedwith a micron layered object is formed by the GO and the PAN. By adopting the structure disclosed by the invention, the thickness of the filter membrane can be improved and the porosity of the filtermembrane is kept; the filtering efficiency of the filter membrane is improved, and the pressure drop of the filter membrane is effectively kept; the filter membrane has the effect of filtering PM2.5 (Particulate Matter 2.5) in the air and has good antibacterial performance.

Description

technical field [0001] The invention relates to an antibacterial air filter membrane based on a polyacrylonitrile / graphene oxide / tea polyphenol compound and a preparation method thereof. Background technique [0002] In recent years, with the development of industrialization and urbanization, air pollution has become increasingly serious. Among them, PM2.5, a tiny particle in the air, stays in the air for a long time and travels a long distance, and can pass through the upper and lower respiratory tracts of the human body, and finally deposits in the lungs of the human body, and even enters the blood through the lungs, posing a major threat to the human body , can cause respiratory disease, heart disease, etc., and can also put pregnant women at risk of premature delivery. The air filter membrane can effectively remove tiny particles in the air, and can be applied to respirators, indoor air purifiers, industrial gas purification, etc. Therefore, the increasingly serious en...

AI Technical Summary

Problems solved by technology

However, the fiber diameter of traditional filter materials is at the micron level, and the gaps are too large to effectively filter tiny particles in the air. Studies have shown that as the fiber diameter decreases, the filtration performance of the material gradually increases. When the fiber diameter is at the nanometer level can significantly improve the filter performance of the material for PM2.5

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