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Preprocessing method for glass fiber cloth

A glass fiber cloth and pretreatment technology, which is applied in the direction of fiber treatment, textile material treatment, chemical instruments and methods, etc., can solve the problem of not being able to make good use of high specific surface area, low photocatalyst surface adhesion, and reduced catalytic activity, etc. problems, to achieve low cost, high production efficiency, and improve surface activity

Active Publication Date: 2013-09-11
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the pore size of the high-silica glass fiber porous structure produced by the conventional acid leaching process is 0.5-20 μm, the pore size range is wide and uncontrollable, and it cannot play the role of high specific surface area and high surface activity when used as a photocatalytic carrier. In order to improve these shortcomings of high-silica glass fiber products, the present invention controls glass phase separation through heat treatment, dilute acid pretreatment controls acid treatment reaction speed, mixed acid controls pore structure and residual impurity content, etc., to obtain pore diameter (5 ~ 20 μm ) and glass fiber cloth with controllable structure, high specific surface area, high surface activity, high temperature resistance, high acid and alkali resistance, and stable quality solve the problem of low adhesion of glass fiber cloth to the photocatalyst surface when used as a photocatalytic carrier , catalytic activity reduction and other technical problems

Method used

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  • Preprocessing method for glass fiber cloth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Cut the non-alkali glass fiber cloth (silica content 53.4wt%) with the specification of 3784-92 into 500mm square cloth, put it into the muffle furnace that has been heated to 520±10°C, keep it warm for 50min, take it out and cool it to At room temperature, then immerse it in 0.1M HCl solution, take it out after 5min and immediately put it into 3.5M, 98℃ HCl+HNO 3 Mixed solution (M HCl / M HNO3 The concentration ratio is 25:1), soak for 240 minutes, take it out and rinse it with tap water immediately, until the pH value of the surface of the cloth is tested with a wide range of test paper is greater than 6, then take it out, and finally put it in an oven for 30 minutes at 115 ° C, take it out, and cool it. product.

[0035] Product performance analysis results: the silica content is 94.3% (weight percentage); the average pore diameter of the porous structure is 15.6 μm; the specific surface area is 127.5m 2 / g; temperature resistance above 1000°C.

Embodiment 2

[0037] Cut the ternary high-silica glass fiber cloth (silica content 67.8wt%) with the specification of 1584-92 into 500mm square cloth, put it into the muffle furnace which has been heated to 450±10°C, and keep it warm for 40min. Take it out and cool it to room temperature, then immerse it in 0.1M HCl solution, take it out after 4min and immediately put it in 3.0M, 92°C HCl+HNO 3 Mixed solution (M HCl / M HNO3 The concentration ratio is 25:1), take it out after soaking for 120 minutes, and immediately rinse it with tap water until the pH value of the surface of the cloth is tested with a wide range of test paper is greater than 6, then take it out, and finally put it in an oven and dry it at 105°C for 20 minutes, take it out, and cool it down. product.

[0038] Product performance analysis results: the silica content is 95.6% (weight percentage); the average pore diameter of the porous structure is 8.6 μm; the specific surface area is 78.6m 2 / g; temperature resistance abov...

Embodiment 3

[0040] Cut the non-alkali glass fiber cloth (silica content 54.2wt%) with the specification of 3784-92 into 500mm square cloth, put it into the muffle furnace which has been heated to 480±10°C, keep it warm for 50min, take it out and cool it to At room temperature, then immerse it in 0.1M HCl solution, take it out after 4min and immediately put it into 4.0M, 100℃ HCl+HNO 3 Mixed solution (M HCl / M HNO3 The concentration ratio is 25:1), take it out after soaking for 180 minutes, and immediately rinse it with tap water until the pH value of the surface of the cloth is tested with a wide range of test paper is greater than 6, then take it out, and finally put it in an oven and bake it at 110°C for 25 minutes, take it out, and cool it down. product.

[0041] Product performance analysis results: the silica content is 93.8% (weight percent); the average pore diameter of the porous structure is 13.8 μm; the specific surface area is 121.4m 2 / g; temperature resistance above 1000°C...

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Abstract

The invention discloses a preprocessing method for glass fiber cloth. The preprocessing method is characterized by comprising the following process steps: (1) processing on the glass fiber cloth for 30-60 minutes at 400 to 550 DEG C; (2) soaking the glass fiber cloth for 1-5 minutes by utilizing 0.1M HCl solution; (3) processing the glass fiber cloth by utilizing 2.5-4M HCl+HNO3 mixed solution with the temperature of 92-100 DEG C for 120-240 minutes; (4) washing the glass fiber cloth until the surface pH is higher than 6; and (5) drying the glass fiber cloth for 5-30 minutes at 105 to 120 DEG C. The glass fiber cloth processed by utilizing the method disclosed by the invention has the silicon dioxide content higher than 93% (percentage by weight) and the characteristics of porous structure and high specific surface area, surface activity, temperature tolerance and acid-base resistance. The preprocessing method has the advantages of simple processing process, high production efficiency, low cost, stable product quality and the like and is suitable for large-scale production of photocatalytic carrier materials.

Description

technical field [0001] The invention relates to a pretreatment method of glass fiber cloth, in particular to a pretreated glass fiber cloth with a silicon dioxide content of more than 93% (percentage by weight), and having a porous structure, high specific surface area, high surface activity, high Heat resistance (temperature resistance above 1000°C), high acid and alkali resistance, can be used as photocatalytic carrier material. Background technique [0002] Environmental problems such as smog in Beijing and other places have aroused widespread concern. Environmental pollution, especially indoor pollution, has become the main concern of people. How to improve the indoor environment of human beings has become an urgent problem that people need to solve. Photocatalytic degradation is a very effective way to treat indoor environmental pollution, which has attracted the attention of governments and researchers in various countries. One of the major elements of photocatalysis ...

Claims

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Application Information

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IPC IPC(8): D06M11/11D06M11/64D06C7/00D06B15/00B01J32/00
Inventor 孙杏国黄岳祥
Owner CHINA JILIANG UNIV
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