Dendritic electrostatic spinning/electret composite nanofiber membrane filter material and preparation method thereof

Abstract

The invention discloses a dendritic electrostatic spinning/electret composite nanofiber membrane filter material. The material is composed of the following raw materials of, by weight, 75 to 90 parts of polythioetherimide, 7 to 13 parts of silicon monoxide, 10 to 16 parts of powdered activated carbon, 2 to 3 parts of a 3-aminopropyltriethoxysilane coupling agent, 0.8 to 2 parts of glacial acetic acid, a proper amount of deionized water, 4 to 7 parts of metatitanic acid, a proper amount of a 0.6 mol/L AgNO3 solution, a proper amount of N-methyl pyrrolidone, 0.5 to 2 parts of dibutyl phthalate and 1 to 3 parts of tetra-n-propylammonium chloride. Silicon nanowires containing alpha-quartz are prepared, the electrostatic spinning/electret composite fiber filter material is prepared through the electrostatic spinning technique and has the excellent electric charge storage performance, and the filter efficiency of the filter material is greatly improved. In addition, nano-silver is added, nano-titanium dioxide is loaded, the antibacterial endurance property of the filter material is improved, and the long-time high-efficiency filter effect is achieved.

Description

technical field [0001] The invention belongs to the field of air filtration, and in particular relates to a dendritic electrostatic spinning / electret composite nanofiber membrane filter material and a preparation method thereof. [0002] technical background [0003] With the deepening and rapid development of the industrialization process, the dust particles discharged into the atmosphere have increased sharply, among which PM2.5 (particulate pollutants with a particle size of less than 2.5µm) will cause serious harm to human health. It will directly enter the bronchi and cause diseases such as asthma, bronchitis, pneumoconiosis and cardiovascular disease. This is one of the main reasons for the sharp increase in lung cancer patients in my country. Therefore, air filter equipment has become a research hotspot, and the research and development of its core filter materials has become a top priority. [0004] The traditional melt-blown nonwoven electret material is treated with...

AI Technical Summary

Problems solved by technology

[0004] The traditional melt-blown nonwoven electret material is treated with electret, and the surface is charged to make it have a high filtration efficiency, but its charge stability is easily affected by the environment, and the charge decay rate is fast, and the filtration efficiency is greatly reduced.

In addition, the electret process, as a necessary post-treatment process, also increases the production cost to a certain extent