A kind of porous fiber non-woven fabric and preparation method thereof

Abstract

The invention discloses a porous fiber nonwoven fabric and a preparation method thereof, and relates to the technical field of textiles. In the present invention, polyethylene glycol 200 and paraffin are first mixed to prepare a mixed diluent, and then sodium alginate and vinyl acetate are used under the action of sodium persulfate to prepare a modified sodium alginate blank, and then the modified sodium alginate blank is prepared. The sodium alginate blank is mixed with nano calcium carbonate treated with sodium dodecyl benzene sulfonate and polyethyleneimine to obtain modified sodium alginate, and the mixed diluent and modified sodium alginate are mixed into the polymer, The primary non-woven fabric is obtained by mixing granulation and melt-blown spinning. Finally, the primary non-woven fabric is mixed and reacted with a mixed aqueous solution, filtered, and freeze-dried to obtain a porous fiber non-woven fabric. The porous fiber nonwoven fabric prepared by the invention has good porosity and excellent mechanical properties.

Description

technical field [0001] The invention relates to the technical field of textiles, in particular to a porous fiber non-woven fabric and a preparation method thereof. Background technique [0002] Melt-blown technology is a method of preparing ultra-fine fibers by blowing polymer melt with high-speed, high-temperature air (often close to the melting point of the polymer) to make it stretch rapidly, which can be formed into non-woven fabrics in one step. The non-woven fabric assembled by random stacking of fibers produced by melt-blown technology has very good structural properties, such as ultra-fine fibers, large specific surface area, high porosity, interconnected pore structure, and small solute diffusion resistance. Suitable for use as adsorption and filtration separation materials. Melt blown non-woven products have unique advantages in the fields of medical protection (smog, bird flu, air purification), thermal insulation, sound absorption and noise reduction, sewage tre...

AI Technical Summary

Problems solved by technology

However, there are still some deficiencies in the existing melt-blown technology

[0003] Existing melt-blown non-woven products still cannot meet the high-precision and high-performance filtration requirements, such as anti-smog masks, car / tank engine dust-proof, etc. If you want to further improve the use effect or performance of its products, you need to increase its specific surface area. This can be achieved by reducing the fiber diameter to the nanoscale and introducing a porous structure

Nonwoven Technologies Company has prepared polypropylene fibers with a fiber diameter of about 500nm by using a spinning hole with a diameter of 63.5μm, but this method has a low yield, and the spinneret is extremely expensive, and it is easy to crack and plug, and the production cost is too high. high

At present, domestic meltblown equipment and polypropylene raw materials cannot meet the production conditions of nanofibers

The introduction of the porous structure can be achieved by adding incompatible inorganic nanoparticles or polymers to the melt-blown polymer masterbatch, and then selectively removing the pores by solvent dissolution or calcination, but this method will lead to a significant increase in the mechanical properties of the fibers. Decline and there is a problem of incomplete dissolution

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