Preparation method of tough composite high-temperature needling filter material

A filter material and toughness technology, which is applied in the field of preparation of strong and tough composite high-temperature needle-punched filter materials, can solve the problems of brittleness, poor ductility and toughness, poor thermal shock resistance, etc., and achieve outstanding filtering performance, reduced damage, high The effect of filtering precision

Inactive Publication Date: 2016-12-14
YANCHENG SHIBANG TRADE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem mainly solved by the present invention: aiming at the defects of brittleness, poor ductility / toughness, and poor thermal shock resistance of the current traditional filter materials, the present invention combines the hydrolyzate of nitric acid and aluminum isopropoxide with ethyl orthosilicate Mix water bath with alcohol liquid saponification hydrolyzate, add hydrofluoric acid solution dropwise, ball mill with basalt fragments, calcined to melt, draw wire with glass rod, carry out loosening treatment, and finally lay acupuncture to get a strong and tough composite high temperature needle Prick the filter material, compound aluminum isopropoxide and tetraethyl silicate to prepare xerogel, and then compound calcination and melting with basalt to prepare the filter material, and toughen and modify the filter material through the whiskers formed by gel calcination, which has a wide range of applications. prospect of use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0016] According to the mass ratio of 1:5, aluminum isopropoxide and 15% nitric acid solution were stirred and mixed, heated in a water bath at 85°C for 10 minutes to prepare aluminum isopropoxide hydrolyzate, and then according to the mass ratio of 1:1, orthosilicon Ethyl orthosilicate was stirred and mixed with 50% ethanol solution and placed in a beaker, 10% nitric acid solution was added dropwise until the pH reached 4.5, and heated in a water bath at 75°C for 1 hour to prepare ethyl orthosilicate hydrolyzate, then According to the mass ratio of 1:1, the aluminum isopropoxide hydrolyzate and the tetraethyl orthosilicate hydrolyzate were mixed and placed in the Erlenmeyer flask, and heated in a water bath at 75°C for 1 hour; after the water bath heating was completed, dropwise added Mass fraction of 10% hydrofluoric acid solution, the dropping mass is controlled to be 1 / 10 of the hydrolyzate mass of tetraethyl orthosilicate, after the dropping is completed, stir and mix for ...

example 2

[0019] According to the mass ratio of 1:5, aluminum isopropoxide and 15% nitric acid solution were stirred and mixed, heated in a water bath at 87°C for 13 minutes to prepare aluminum isopropoxide hydrolyzate, and then according to the mass ratio of 1:1, orthosilicon Stir and mix ethyl orthosilicate with 50% ethanol solution and place in a beaker, add dropwise 10% nitric acid solution until the pH reaches 4.5, and heat in a water bath at 77°C for 1.5h to prepare ethyl orthosilicate hydrolyzate. Then, according to the mass ratio of 1:1, the aluminum isopropoxide hydrolyzate and the tetraethyl orthosilicate hydrolyzate were mixed and placed in the Erlenmeyer flask, and heated in a water bath at 77°C for 1.5h; after the water bath heating was completed, the Erlenmeyer flask was Add a hydrofluoric acid solution with a mass fraction of 10% dropwise, and control the dropping mass to be 1 / 10 of the hydrolyzed solution of tetraethyl orthosilicate. After the dropping is completed, stir ...

example 3

[0022] According to the mass ratio of 1:5, aluminum isopropoxide and 15% nitric acid solution were stirred and mixed, and heated in a water bath at 90°C for 15 minutes to prepare aluminum isopropoxide hydrolyzate, and then according to the mass ratio of 1:1, orthosilicon Ethyl orthosilicate was stirred and mixed with 50% ethanol solution and placed in a beaker, 10% nitric acid solution was added dropwise until the pH reached 4.5, and heated in a water bath at 80°C for 2 hours to prepare ethyl orthosilicate hydrolyzate, then According to the mass ratio of 1:1, the aluminum isopropoxide hydrolyzate and the tetraethyl orthosilicate hydrolyzate were stirred and mixed and placed in the Erlenmeyer flask, and heated in a water bath at 80°C for 2 hours; after the water bath heating was completed, dropwise added Mass fraction of 10% hydrofluoric acid solution, control the dropping mass to be 1 / 10 of the mass of tetraethyl orthosilicate hydrolyzate, after the dropping is completed, stir ...

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Abstract

The invention discloses a preparation method of a tough composite high-temperature needling filter material and belongs to the technical field of filter materials. The preparation method comprises the steps that hydrolysate of nitric acid and aluminum isopropoxide and saponification hydrolysate of tetraethoxysilane and aqueous alcohol are mixed in a water bath, a hydrofluoric acid solution is added dropwise, the mixture and basalt fragments are ball-milled and calcined to be fused, then drawing is conducted with a glass rod, opening treatment is conducted, lastly, needling laying is conducted, and the tough composite high-temperature needling filter material is obtained. Basalt is used as an additive, and the basalt is high in density, compression strength and durability; hydrofluoric acid is used for making effective ingredients in the basalt released, the brittleness and toughness of the basalt are improved, and wide application prospects are achieved.

Description

technical field [0001] The invention discloses a preparation method of a strong-toughness composite high-temperature needle-punched filter material, which belongs to the technical field of filter materials. Background technique [0002] With the advancement of science and technology, the research on high temperature resistant air filter materials has attracted the attention of researchers at home and abroad. At present, high temperature resistant air filter materials have been widely used in the automotive industry, pharmaceutical industry, environmental protection industry, nuclear industry and military fields Wait. As a new type of filter material, non-woven high temperature resistant air filter material has better filter performance than woven and knitted filter materials, and has high output, low cost, easy deep processing on the production line and can be combined with other filter materials Composite and other advantages, so it has been widely used in all walks of lif...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/14C10K1/02
CPCB01D39/14B01D2239/10C10K1/024
Inventor 董晓蒋玉芳陆娜
Owner YANCHENG SHIBANG TRADE
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