Method for manufacturing electrospun nanofiber gas filtering material in mass manner

Abstract

The invention discloses a method for manufacturing an electrospun nanofiber gas filtering material in a mass manner by using an umbrella-shaped electrostatic spinning sprayer. The method comprises: dissolving a high-molecular polymer in a solvent, mixing to obtain an even solution; using the spinning solution in electrostatic spinning to obtain a nanofiber membrane; combining the nanofiber membrane with a non-woven fabric, manufacturing non-woven fabric / nanofilm / non-woven fabric composite film; performing ultrasonic bonding on the non-woven fabric / nanofilm / non-woven fabric composite film, to manufacture a filtering material. The manufacturing method is convenient and fast, and can realize small-batch production. Filtering efficiency of the obtained filtering material reaches up to 99.55%, filtering resistance is 150-200 Pa, gas permeability reaches 355L.m<-2>.s<-1>, and moisture-penetrability reaches 9.6 m<2>.Pa / w, that is, the material has good gas permeability and moisture penetrability, and the method has very good application prospect in the field of air filtering.

Description

technical field [0001] The invention belongs to the application field of electrospinning nanofiber membranes, and in particular relates to a method for mass-preparing electrospinning nanofiber gas filter materials by using an umbrella-shaped electrospinning nozzle. Background technique [0002] In recent years, the problem of air pollution has been serious and has spread to major cities in my country, such as PM2.5, commonly known as "smog". As daily protective equipment, filter products can effectively resist the threat of PM2.5 to human health (including various diseases such as pneumonia, asthma and decreased lung function). At present, the filtration products on the market include carbon fiber felt pads, polymer fabrics, and non-woven fabrics. Among them, there are two main types that occupy a large market share. One is non-woven fabric products, which have low filtration efficiency and are difficult to meet people's high environmental cleanliness. One is the product ob...

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Problems solved by technology

An anti-smog mask with dual functions of filtration and adsorption prepared by designing the mask structure [Chen Mingwei et al. An anti-smog mask with dual functions of filtration and adsorption based on nanostructures [P]. Chinese patent: ZL201410490840.0, 2014 -09-23], the filter material can be replaced, but there is no data on the filtration efficiency and resistance of the product and after repeated cleaning and use

In addition, two patents applied by Guizhou Provincial Institute of Analysis and Testing, [Song Guanglin et al. A spinning solution and its method for preparing antibacterial air filter membrane [P]. Chinese patent: ZL201410407569.X, 2014-08-18] And [Song Guanglin et al. A preparation method of air filtration membrane [P]. Chinese patent: ZL201410406705.3, 2014-08-18] also did not provide data on the filtration efficiency and resistance of the product

There are few reports on nano-membrane filtration products with high output, high filtration efficiency, low filtration resistance, and good air and moisture permeability.

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