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Preparation method of refractory moisture-proof wheat straw board

A wheat straw board and refractory technology, applied in the jointing of wooden veneers, flat products, manufacturing tools, etc., can solve the problems of easy moisture absorption, rough surface, fire prevention, poor heat resistance, etc., to improve thermal stability, The effect of heat reduction

Inactive Publication Date: 2018-08-07
许水仙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The main technical problem to be solved by the present invention is to provide a method for preparing a fire-resistant and moisture-proof wheat straw board in view of the defects that the wheat straw board currently on the market has a rough surface, is easy to absorb moisture, and as a non-metallic material, has poor fire resistance and heat resistance

Method used

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  • Preparation method of refractory moisture-proof wheat straw board

Examples

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example 1

[0027] Mix rice straw and wheat straw with a mass ratio of 1:5, put them into a pulverizer and pulverize them for 4 hours, pass through a 200-mesh sieve to obtain wheat straw scraps, take trimethylmethoxysilane with 2% mass of wheat straw scraps, and use Dissolve trimethylmethoxysilane in acetone to prepare a trimethylmethoxysilane solution with a mass fraction of 5%, mix wheat straw scraps and burnt rice husk ash at a mass ratio of 5:1, and then Soak in trimethylmethoxysilane solution, soak for 4 hours at room temperature, filter, remove the filtrate to obtain modified straw fragments; mix 70g of modified straw fragments, 20g of bamboo fiber, and 100mL of water to obtain straw slurry, and The straw slurry was injected into a forming tank equipped with a vacuum dehydration device. After air bubbling and stirring for 10 seconds, it was left to stand for vacuum dehydration for 5 minutes. When the dehydration was controlled, the vacuum degree was 70 Pa to obtain a straw wet moldin...

example 2

[0029] Mix rice straw and wheat straw at a mass ratio of 1:5, put them into a pulverizer and pulverize them for 4.5 hours, pass through a 200-mesh sieve to obtain wheat straw scraps, take trimethylmethoxysilane with 2% mass of wheat straw scraps, Dissolve trimethylmethoxysilane with acetone to prepare a trimethylmethoxysilane solution with a mass fraction of 5%, mix wheat straw scraps and rice husk burnt ash in a mass ratio of 5:1, Then soak in trimethylmethoxysilane solution, soak at room temperature for 4.5h, filter, remove the filtrate to obtain modified straw fragments; mix 75g of modified straw fragments, 25g of bamboo fiber, and 110mL of water to obtain straw slurry , inject the straw slurry into the molding tank with a vacuum dehydration device, after air bubbling and stirring for 13s, let it stand for vacuum dehydration for 7min, and control the vacuum degree of 75Pa during dehydration to obtain a straw wet molded body; add 110g polyphosphoric acid to the beaker Ammoni...

example 3

[0031] Mix rice straw and wheat straw at a mass ratio of 1:5, put them into a pulverizer and pulverize them for 5 hours, pass through a 200-mesh sieve to obtain wheat straw scraps, take trimethylmethoxysilane with 2% mass of wheat straw scraps, and use Dissolve trimethylmethoxysilane in acetone to prepare a trimethylmethoxysilane solution with a mass fraction of 5%, mix wheat straw scraps and burnt rice husk ash at a mass ratio of 5:1, and then Soak in trimethylmethoxysilane solution, soak for 5 hours at room temperature, filter, remove the filtrate to obtain modified straw fragments; mix 80g of modified straw fragments, 30g of bamboo fiber, and 120mL of water to obtain straw slurry, and The straw slurry was injected into a molding tank with a vacuum dehydration device, and after air bubbling and stirring for 15 seconds, it was left to stand for vacuum dehydration for 8 minutes. When the dehydration was controlled, the vacuum degree was 80 Pa, and a straw wet molded body was ob...

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Abstract

The invention relates to the technical field of artificial board preparation, and in particular relates to a preparation method of a refractory moisture-proof wheat straw board. The preparation methodprovided by the invention comprises the following step of taking rice straw and wheat straw as raw materials to prepare modified straw fragments, and adding methyl triethoxysilane into a flame retardant material, processing to obtain silica gel microencapsulated ammonium polyphosphate, mixing a modified soybean protein adhesive with the silica gel microencapsulated ammonium polyphosphate to obtain a flame retardant adhesive, and finally, bonding and hot-pressing wheat straw board layers to obtain the wheat straw board. According to the preparation method provided by the invention, a silica gel microencapsulated ammonium polyphosphate is prepared by wrapping ammonium polyphosphate with the silica gel, thus improving the thermal stability of ammonium polyphosphate. In addition, ammonium polyphosphate can co-decompose with the protein adhesive in a high temperature combustion process to form metaphosphoric acid, and prevent oxygen and heat from further diffusing into the polyurethane foam, thus improving the refractory and flame retardant properties of the wheat straw board; methoxy groups and amine substances in the protein adhesive react to form potassium methyl silicate, and forma waterproof mineral film on the surface of the straw board, and broad application prospect is obtained.

Description

technical field [0001] The invention relates to the technical field of artificial board preparation, in particular to a method for preparing a fire-resistant and moisture-proof wheat straw board. Background technique [0002] At present, due to the protection of the environment and forest resources in various countries, the use of wood-based panels is gradually restricted, but the demand for wood-based panels in society is increasing. Therefore, people are paying more and more attention to the issue of wood substitutes. my country is a big country of grain production and also a big country of straw production. A large amount of wheat straw is produced every year, accounting for about 20% to 30% of the total straw in the world. Among them, rice, wheat, soybean, corn, potato and other food crop straw are about 580 million tons, accounting for 89% of the total straw; peanut, rapeseed, sesame, sunflower and other oil crop straw accounted for 8% of the total, and cotton and su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27N1/00B27N3/02B27N3/10B27N3/20B27D1/08B27L11/02
CPCB27D1/08B27L11/02B27N1/00B27N3/02B27N3/10B27N3/203
Inventor 许水仙何伟仁张建初
Owner 许水仙
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