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A kind of preparation method of silicate flame retardant dense wood

A silicate and wood technology, applied in wood heating, wood impregnation, wood treatment and other directions, can solve the problems of high cost and high brittleness of impregnated modified materials, achieve low cost, improve flame retardancy, and be suitable for popularization and application Effect

Active Publication Date: 2021-04-23
HENAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 pressing. Wood structure, while improving the loss resistance of flame retardant components, completely solve the problems of free formaldehyde release and impregnated modified materials with high brittleness and high cost, and significantly improve the mechanical strength and flame retardant properties of wood

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  • A kind of preparation method of silicate flame retardant dense wood
  • A kind of preparation method of silicate flame retardant dense wood

Examples

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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 dense wood, and belongs to the technical field of preparation methods of flame-retardant dense wood. The invention forms a dense laminated wood structure through steps such as wood component removal, silicate infiltration, and high-temperature hot-pressing process. While improving the loss resistance of flame-retardant components, it completely solves the problem of free formaldehyde release and high brittleness of impregnated modified materials. , high cost and other issues, significantly improving the mechanical strength and flame retardant properties of wood. Moreover, the invention has low cost, simple process, no expensive resin synthesis device, low impregnation pressure, easy control, and short drying cycle; it is environmentally friendly, has no formaldehyde release, and reduces environmental pollution; and at the same time, it improves the strength, toughness and flame retardancy of wood performance. The invention has high reference value for the reinforcement-flame retardant modification of low-quality wood in plantation forests, 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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Patent Type & Authority Patents(China)
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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