A kind of flame-retardant thermally modified wood and its preparation method

A thermal modification, wood technology, applied in wood treatment, wood impregnation, wood impregnation, etc., can solve the problem of no wood found

Active Publication Date: 2017-08-25
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] No related patents have been found on the process combining flame retardant with high temperature heat treatment and the wood produced by this method

Method used

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  • A kind of flame-retardant thermally modified wood and its preparation method
  • A kind of flame-retardant thermally modified wood and its preparation method
  • A kind of flame-retardant thermally modified wood and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Example 1 Preparation of modified nitrogen and phosphorus flame retardant

[0087] 1. Prepare polysilicate aluminum dihydrogen phosphate solution

[0088] 1A) Add aluminum dihydrogen phosphate powder to water, stir and dissolve uniformly to prepare aluminum dihydrogen phosphate solution, where the mass percentage concentration of the aluminum dihydrogen phosphate solution is 20%, that is, 400g aluminum dihydrogen phosphate is dissolved in every 100g In the water

[0089] 1B) Add sodium silicate to water, stir and dissolve uniformly to prepare a silicate solution, wherein the mass percentage concentration of the sodium silicate solution is 3%, that is, every 3g sodium silicate is dissolved in 97g water;

[0090] The concentration of aluminum dihydrogen phosphate solution in the present invention is 20%, and aluminum dihydrogen phosphate solutions with a concentration of 15-25% are all suitable for the present invention; the concentration of the silicate solution is 3% except for...

Embodiment 2

[0107] Example 2 Preparation of flame-retardant thermally modified wood

[0108] 1. Prepare modified flame retardant solution

[0109] The modified nitrogen and phosphorus flame retardant prepared in Example 1 was dissolved in water, stirred and dissolved uniformly to obtain a modified flame retardant solution. The mass percentage concentration of the modified flame retardant solution was 10%, that is, every 10g of modified nitrogen and phosphorus The flame retardant solution is obtained in 90g water.

[0110] In the embodiment of the present invention, the flame retardant solution with a mass percentage concentration of 10% is taken as an example for description, and other flame retardant solutions with a mass percentage concentration of 5-15% are all suitable for the present invention.

[0111] In addition to the modified nitrogen-phosphorus flame-retardant, the flame-retardant used in the impregnation treatment of the present invention is also applicable to the present invention. ...

Embodiment 3

[0127] Example 3 Preparation of flame-retardant thermally modified wood

[0128] 1. Prepare modified flame retardant solution

[0129] The modified nitrogen and phosphorus flame retardant prepared in Example 1 was dissolved in water, stirred and dissolved uniformly to obtain a modified flame retardant solution. The mass percentage concentration of the modified flame retardant solution was 5%, that is, every 5g of modified nitrogen and phosphorus The flame retardant solution is obtained in 95g water.

[0130] 2. Dipping treatment

[0131] 2-1) Vacuum impregnation treatment

[0132] Pour the flame retardant solution into the impregnating tank with fast-growing poplar wood, soak the wood completely, and connect the vacuum pump; turn on the vacuum pump for vacuum treatment to reduce the vacuum in the tank and keep it at -0.09MPa. Vacuum impregnation treatment is performed on the wood under pressure to obtain vacuum impregnated wood, wherein the volume ratio of the wood to the flame retard...

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Abstract

The invention relates to flame-retardant thermal modification wood and a preparation method thereof. The preparation method comprises the step that after being subjected to immersion treatment, the wood is subjected to heat treatment. According to the flame-retardant thermal modification wood and the preparation method thereof, the flame-retardant thermal modification wood is prepared by combining the wood high-temperature heat treatment with the wood flame-retardant technology; the dual characteristics that the wood is subjected to high-temperature heat treatment and flame retarding are achieved at the same time; the flame-retardant thermal modification wood has the good surface decorative performance, dimensional stability and the like, and the excellent flame-retardant property is also achieved; the combustion heat release rate and smoke production are substantially decreased, and the fireproof safety of processed wood products is greatly increased.

Description

Technical field [0001] The invention relates to a heat-treated wood and a preparation method thereof, in particular to a fire-retardant heat-treated wood and a preparation thereof, and belongs to the technical field of wood thermal modification treatment. Background technique [0002] Existing studies have shown that high-temperature heat treatment of wood is generally carried out under vacuum, water vapor, nitrogen and other protective gases, and the temperature is increased to between 160-260°C. The heat causes the wood to undergo physical and chemical reactions to achieve the purpose of improving its performance. The holding time is usually 2-10 hours, and part of the processing time can even reach more than 10 hours. High temperature heat treatment can give excellent wood dimensional stability, biological durability, corrosion resistance, safety, and environmental protection. Heat-treated materials are widely used in furniture, indoor and outdoor architectural decoration and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27K3/08B27K3/02B27K5/00B27K3/52B27K3/16C01B33/20
CPCB27K3/02B27K3/08B27K3/166B27K3/52B27K5/0085B27K2240/30C01B33/20
Inventor 储德淼母军张峰薛磊张宇
Owner BEIJING FORESTRY UNIVERSITY
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