SiO2 aerogel-bicomponent non-woven felt composite material for absorption and its manufacturing method

Abstract

The invention relates to a SIO2 aerogel-bi-component nonwoven composite for absorption in the areas of air purification, effluent treatment, chemical purification, chemical filtration, seawater purification and solvent recovery, which has two layers of bi-component nonwoven to clamp one layer of particle SIO2 aerogel or three layers of bi-component knonwoven to clamp two layers of particle SIO2 aerogel. Said bi-component nonwoven is selected as common polyester fiber and polypropylene with lower melting point or polypropylene and polyethylene, to be made into network and felt with needle. The rate between said two components are 30:70-70:30, the density of nonwoven felt is 50-400g / m2, the thickness is 1-5mm, the particle diameter of SIO2 aerogel is 20-60 items, and the cost is 10-100g of each square meter composite. The producing method comprises heating and crushing the nonwoven felt which has clamped particle SIO2 aerogel on the compounding machine as a whole. The invention has the advantages as high specific surface area, high absorption rate, long service life and wider application.

Description

Technical field [0001] The present invention relates to SiO for adsorption used in the fields of air purification, sewage treatment, chemical purification, medical filtration, seawater purification, solvent recovery, etc. 2 Aerogel-two-component non-woven felt composite material and manufacturing method thereof. Background technique [0002] With the rise of the wave of green, healthy, and optimized human living environment, the application of filtration and adsorption materials has become more and more extensive. Granular activated carbon is the earliest first-generation adsorption material used by people. Activated carbon fiber is a second-generation adsorption material. It is a fibrous high-efficiency adsorption material made of high-polymer material through high-temperature carbonization and activation. Its adsorption performance is greatly improved than that of granular activated carbon, and its application range is also It is wider, but the adsorption efficiency still canno...

AI Technical Summary

Problems solved by technology

But due to SiO 2 The mechanical strength of airgel is low, it is difficult to form, and it will turn into powder when it is slightly stressed. It is difficult to use as an adsorption material alone, which also hinders a wide range of applications.

[0004] Some people try to use SiO 2 Airgel composite technology with other materials, such as Chinese Patent Application No. 95197068.2 "A Composite Material Containing Airgel, Its Preparation Method and Application" and Chinese Patent Application No. 96196880.X "Aerogel Composite Material Containing Fibers 》, but most of its products are composite plates, and many composite materials will cover the pores of airgel, so they are all used in the field of thermal insulation, not in the field of filtration and adsorption

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