A kind of flame retardant and antibacterial composite polypropylene filter material and preparation method thereof

Abstract

The invention discloses a flame-retardant and antibacterial composite polypropylene filter material and a preparation method thereof. The filter material comprises the following components by weight percentage, 70-90 wt% of isotactic polypropylene and 3-10 wt% of functional anion release Materials, 3-10 wt% nano antibacterial agent, 2-5 wt% graphene oxide, 0.5-5 wt% flame retardant and 1-3 wt% dispersant. The filter material of the present invention can be prepared into various forms such as mesh or fabric through melt blending and extrusion, and is suitable for the removal of pollutants in the air in different environments. The functional anion releasing material adopts piezoelectric material, which can spontaneously generate Oxygen ions do not consume energy, do not produce secondary pollution such as ozone, and the released negative oxygen ions coagulate and settle with positively charged particles in the air, which can quickly remove particles; the combination of two or more flame retardants can improve For the flame retardant performance of the material, graphene oxide is used as a conductive modifier, which can not only enhance the negative ion release ability of the piezoelectric material, but also complement the antibacterial effect with the nano antibacterial agent.

Description

technical field [0001] The invention relates to an air filter material, in particular to a flame-retardant and antibacterial composite polypropylene filter material and a preparation method thereof. Background technique [0002] People pay more and more attention to air purification. The most obvious manifestation is that there are more and more air purification projects in public buildings, and air filter materials are widely used in large complexes such as subways, hospitals, hotels, and shopping malls. The purification of particulate matter in the air mainly includes physical purification and electrostatic purification. Among them, physical purification has attracted much attention because of its high efficiency. High-efficiency air filter (HEPA) is currently the most widely used particle filtration and purification technology. Its filter medium is made of fine polymer fiber material, which is considered to have a removal rate of 99.97% for particles above 0.3 microns. Am...

AI Technical Summary

Problems solved by technology

The purification of particulate matter in the air mainly includes physical purification and electrostatic purification. Among them, physical purification has attracted much attention because of its high efficiency. High-efficiency air filter (HEPA) is currently the most widely used particle filtration and purification technology. Its filter medium is made of fine polymer fiber material, which is considered to have a removal rate of 99.97% for particles above 0.3 microns. Among them, the filter medium is a key factor related to whether the concentration of particulate matter in the air meets the standard, but the existing HEPA material does not have The antibacterial and flame retardant function, on the one hand, in actual work, due to the large number of microorganisms gathering on the surface of the material, it is easy to rot and cause the release of harmful odors to humans; Secondary damage due to small pore size, high filtration resistance, complicated preparation and non-reusable use will result in waste of energy and increase in filtration costs; high-voltage electrostatic filtration technology has been used in recent years because of its long service life, low resistance and no need for frequent replacement. It is becoming more and more widespread. The principle is that the dust-containing gas is electrically separated when it passes through a high-voltage electrostatic field. Ozone and other derivative pollutants will be produced. At the same time, the efficiency of electrostatic dust removal is greatly affected by the ambient temperature and humidity, and the purification efficiency is not stable enough. The actual work will also cause ignition due to high voltage, which has a certain fire hazard.