Organic and inorganic composite nanofiber membrane filtering material and preparation method thereof

Abstract

The invention relates to an organic and inorganic composite nanofiber membrane filtering material and a preparation method thereof. The organic and inorganic composite nanofiber membrane filtering material is composed of a non-woven fabric base material and an organic nanofiber membrane, which is attached to the surface of the non-woven fabric base material and scattered with inorganic nano active particles. The preparation process of organic nano fiber comprises performing blend-melt spinning with thermoplastic polymer and cellulose acetate butyrate, and performing solvent extraction to obtain thermoplastic polymer nanofiber; then proportionally dispersing the nanofiber and the inorganic nano active particles into ethanol to obtain a mixed suspension of the nanofiber and the inorganic active particles; lastly, evenly coating the suspension onto the surface of the non-woven fabric base material, and drying the coated non-woven fabric base material at room temperature to obtain the organic and inorganic composite nanofiber membrane filtering material. The preparation process of the organic and inorganic composite nanofiber membrane filtering material has the advantages of being simple in process, low in cost and energy consumption and high in yield. The nanofiber and the nano active particles in the organic and inorganic composite nanofiber membrane filtering material are three-dimensionally uniformly distributed, so that the organic and inorganic composite nanofiber membrane filtering material has the advantage of being stable in structure and excellent in absorbing and filtering performance.

Description

technical field [0001] The invention relates to an organic-inorganic composite nanofiber membrane filter material and a preparation method thereof, belonging to the technical field of textile materials. Background technique [0002] In the field of textile materials, nanofibers refer to ultrafine fibers with a diameter of less than 1000 microns. They have the characteristics of large specific surface area, large aspect ratio and easy film formation. They are widely used in the fields of human protection, biomedicine, energy information and industrial purification. Especially as a membrane filter material for air purification and water treatment. [0003] The nanofiber membrane material has high porosity and small pore size, which increases the probability of blocking and adsorbing small particles in the medium, thereby improving the filtration efficiency. The existing method mainly improves the filtration efficiency of the nanofiber membrane for particulate matter by changi...

AI Technical Summary

Problems solved by technology

[0006] The disadvantage of the above technical solution is that this kind of fiber is prepared by ordinary melt spinning method, and the fiber diameter is difficult to reach the nanometer level. Compared with nanofiber, its specific surface area and porosity are low, thus affecting the filtration performance of the filter material

[0008] The disadvantage of the above technical solution is that the nanofiber material is an inorganic carbon material, which has poor plasticity and toughness, and it is difficult to process the filter material into a web; at the same time, the large-scale electrospinning equipment is expensive and costly, and it is difficult to widely apply in the field of filtration.

[0010] Although this method improves the adsorption performance of the nanofiber itself and improves the filtration effect of the material, it is difficult to effectively control the packing density of the fiber during the formation of the nanofiber membrane, so it is difficult to significantly reduce the filtration resistance of the membrane material.