Flame-retardant thermal modification wood and preparation method thereof

A thermal modification, wood technology, applied in the direction of wood treatment, impregnated wood, wood impregnation, etc., can solve the problem of undiscovered wood

Active Publication Date: 2016-06-15
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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  • Flame-retardant thermal modification wood and preparation method thereof
  • Flame-retardant thermal modification wood and preparation method thereof
  • Flame-retardant thermal modification wood and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Embodiment 1 prepares modified nitrogen phosphorus flame retardant

[0087] 1. Preparation of polysilicate aluminum dihydrogen phosphate solution

[0088]1A) Add aluminum dihydrogen phosphate powder into water, stir, dissolve evenly, and make aluminum dihydrogen phosphate solution, wherein, the mass percentage concentration of aluminum dihydrogen phosphate solution is 20%, that is, every 100g of aluminum dihydrogen phosphate is dissolved in 400g of aluminum dihydrogen phosphate in water;

[0089] 1B) adding sodium silicate into water, stirring, and dissolving evenly to prepare a silicate solution, wherein the mass percentage concentration of the sodium silicate solution is 3%, that is, every 3g of sodium silicate is dissolved in 97g of water;

[0090] In the present invention, the concentration of the aluminum dihydrogen phosphate solution is except 20%, and the aluminum dihydrogen phosphate solution with a concentration of 15-25% is applicable to the present invention...

Embodiment 2

[0107] Embodiment 2 prepares flame-retardant thermally modified wood

[0108] 1. Preparation of modified flame retardant solution

[0109] Dissolve the modified nitrogen-phosphorus flame retardant prepared in Example 1 in water, stir and dissolve evenly to obtain a modified flame retardant solution, the mass percentage concentration of the modified flame retardant solution is 10%, that is, every 10g of modified nitrogen-phosphorus Flame retardant solution in 90g of water, ready.

[0110] In the embodiment of the present invention, the mass percent concentration of the flame retardant solution is 10% for illustration. Other flame retardant solutions with a mass percent concentration of 5-15% are applicable to the present invention.

[0111] In addition to the modified nitrogen-phosphorus flame retardant, the flame retardant used for the dipping treatment in the present invention is also suitable for the present invention. The nitrogen-phosphorus flame retardant powder prepare...

Embodiment 3

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

[0128] 1. Preparation of modified flame retardant solution

[0129] Dissolve the modified nitrogen-phosphorus flame retardant prepared in Example 1 in water, stir and dissolve evenly to obtain a modified flame retardant solution, the mass percentage concentration of the modified flame retardant solution is 5%, that is, every 5g of modified nitrogen-phosphorus Fire retardant solution in 95g of water, to get.

[0130] 2. Dipping treatment

[0131] 2-1) Vacuum impregnation treatment

[0132] Pour the flame retardant solution into the impregnation tank equipped with fast-growing poplar, soak the wood completely, and connect the vacuum pump; turn on the vacuum pump for vacuum treatment, so that the vacuum degree in the tank is reduced and maintained at -0.09MPa. Carry out vacuum impregnation treatment to wood under pressure state, make vacuum impregnation wood, wherein, the volume ratio of wood and flame r...

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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 heat-treated wood and a preparation method thereof, in particular to flame-retardant heat-treated wood and its preparation, and belongs to the technical field of wood heat modification treatment. Background technique [0002] Existing studies have shown that high-temperature heat treatment of wood is generally carried out under protective gases such as vacuum or water vapor, nitrogen, etc., and the temperature is raised to between 160-260 °C, and the physical and chemical reactions of wood are caused by heat to improve its performance. The holding time is usually 2-10 hours, and some processing times even reach more than 10 hours. High-temperature heat treatment can endow wood with excellent dimensional stability, biological durability, corrosion resistance, safety, and environmental protection. Heat-treated materials are widely used in furniture, indoor and outdoor architectural decoration and structures, wooden escalators, p...

Claims

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Application Information

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Patent Type & Authority Applications(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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