Preparation method of silicate flame-retardant compact wood

A silicate and wood technology, applied in wood treatment, wood heating, wood impregnation, etc., can solve the problems of high cost and brittleness of impregnated modified materials, and achieve low cost, improved flame retardancy, and low impregnation pressure. Effect

Active Publication Date: 2020-04-21
HENAN AGRICULTURAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies of the prior art and provide a method for preparing silicate flame-retardant dense wood. The present invention forms a dense laminate through the removal of wood components, silicate penetration and high-temperature hot pressin...

Method used

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  • Preparation method of silicate flame-retardant compact wood
  • Preparation method of silicate flame-retardant compact wood

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Embodiment 1

[0023] A method for preparing silicate flame-retardant dense wood, wherein the raw wood for preparing flame-retardant dense wood is selected from artificial forest wood. This embodiment takes poplar as an example to describe in detail:

[0024] (1) Dry the wood for 24 hours under the condition of (103±5° C.), and set it aside; then prepare a sodium chlorite solution with a mass fraction of 2.5% in distilled water, and add an appropriate amount of glacial acetic acid (98%) to adjust the pH value of the solution to 4.6; Put the dried wood into the acidic sodium chlorite solution, raise the temperature to 100°C, keep the liquid level higher than the wood sample and boil for 24 hours, and finally rinse the wood with distilled water several times.

[0025] (2) Select sodium silicate with a modulus of 3.3, configure a sodium silicate solution with a mass fraction of 35%, and slowly add 3-aminopropyltriethoxy with a mass fraction of 3% of the entire sodium silicate solution. Silane (...

Embodiment 2

[0030] A method for preparing silicate flame-retardant dense wood, wherein the raw wood for preparing flame-retardant dense wood is selected from artificial forest wood. This embodiment takes poplar as an example to describe in detail:

[0031] (1) Dry the wood for 24 hours under the condition of (103±5° C.), and set it aside; then prepare a sodium chlorite solution with a mass fraction of 2.5% in distilled water, and add an appropriate amount of glacial acetic acid (98%) to adjust the pH value of the solution to 4.6; Put the dried wood into the acidic sodium chlorite solution, raise the temperature to 100°C, keep the liquid level always higher than the wood sample and boil for 12 hours, and finally rinse the wood with distilled water several times.

[0032] (2) Select sodium silicate with a modulus of 3.3, configure a sodium silicate solution with a mass fraction of 30%, and slowly add 3-aminopropyltriethoxy with a mass fraction of 1% of the entire sodium silicate solution. S...

Embodiment 3

[0037] A method for preparing silicate flame-retardant dense wood, wherein the raw wood for preparing flame-retardant dense wood is selected from artificial forest wood. This embodiment takes poplar as an example to describe in detail:

[0038] (1) Dry the wood for 24 hours under the condition of (103±5° C.), and set it aside; then prepare a sodium chlorite solution with a mass fraction of 2.5% in distilled water, and add an appropriate amount of glacial acetic acid (98%) to adjust the pH value of the solution to 4.6; Put the dried wood into the acidic sodium chlorite solution, raise the temperature to 100°C, keep the liquid level higher than the wood sample and boil for 24 hours, and finally rinse the wood with distilled water several times.

[0039](2) Select sodium silicate with a modulus of 3.3, configure a sodium silicate solution with a mass fraction of 40%, and slowly add 3-aminopropyltriethoxy with a mass fraction of 3% of the entire sodium silicate solution. Silane (K...

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Abstract

The invention discloses a preparation method of silicate flame-retardant compact wood, and belongs to the technical field of preparation methods of flame-retardant compact wood. According to the invention, a compact laminated wood structure is formed through wood component removal, silicate permeation, high-temperature hot pressing and other steps, so that the problems of free formaldehyde release, and high brittleness, high cost and the like of impregnated modified materials are thoroughly solved while the loss resistance of flame-retardant components is improved, and the mechanical strengthand the flame retardance of wood are remarkably improved; the method is low in cost, simple in process, free of expensive resin synthesis devices, low in impregnation pressure, easy to control and short in drying period; no formaldehyde is released, so that the environmental pollution is reduced; the strength, the toughness and the flame retardant property of the wood are improved; and the methodhas high reference value for man-made forest low-quality wood reinforcement-flame-retardant modification, and is suitable for popularization and application.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of flame-retardant dense wood, and in particular relates to a preparation method of silicate flame-retardant dense wood. Background technique [0002] Under the background of a complete ban on logging in natural forests, which leads to a tense contradiction between timber supply and demand, improving the quality of low-quality artificial forest timber and realizing its functional and efficient utilization is an important strategic decision for the sustainable development of my country's forestry. In view of the defects of low density, low strength and easy combustion of plantation wood, the integrated technology of resin impregnation modification and flame retardant treatment (organic resin compounded with inorganic flame retardant) is mainly used at this stage to comprehensively improve the performance of wood and at the same time The loss resistance of inorganic flame retardant compo...

Claims

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Application Information

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IPC IPC(8): B27K3/02B27K3/08B27K5/00
CPCB27K3/0207B27K3/0214B27K3/08B27K5/001B27K5/007B27K2240/30
Inventor 王飞
Owner HENAN AGRICULTURAL UNIVERSITY
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