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Preparation method of wood-based selective near-infrared absorption material

A technology of base selectivity and absorbing materials, applied in wood treatment, wood heating, wood impregnation, etc., can solve the problem that transparent wood does not have near-infrared absorption characteristics, achieve strong near-infrared light absorption ability, good social value, preparation short cycle effect

Inactive Publication Date: 2020-09-25
王怀远
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that existing transparent wood does not possess near-infrared absorption characteristics, and to provide a preparation method of wood-based selective near-infrared absorption materials

Method used

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specific Embodiment approach 1

[0009] Embodiment 1: This embodiment is a preparation method of a wood-based selective near-infrared absorbing material, which is specifically completed according to the following steps:

[0010] 1. Remove the chromophoric groups in the wood to obtain the delignified wood substrate;

[0011] 2. Add metal tungsten organic chelates and tungsten oxide nanowires into the resin as near-infrared absorbers to obtain a resin mixed with near-infrared endothermic materials, and the tungsten oxide nanowires in the resin mixed with near-infrared endothermic materials The mass fraction of the thread is 0.03% to 1%, and the mass fraction of metal tungsten organic chelate in the resin mixed with near-infrared endothermic material is 3% to 15%;

[0012] 3. Immerse the delignified wood substrate into the resin mixed with near-infrared heat-absorbing materials, then add curing agent and ethanol, and mix well. First, it will be treated by vacuum infiltration-pressurized infiltration cycle for 1h...

specific Embodiment approach 2

[0013] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the specific process of removing the chromophoric group in the wood in step 1 is as follows: ①, first dry the wood veneer at a temperature of 103-105°C for 12h-14h , to obtain the dried wood veneer; ②, immerse the dried wood veneer in the delignification solution, and use glacial acetic acid to adjust the pH of the delignification solution to 4-5, and then treat it in a water bath at a temperature of 75-95°C for 8 hours ~12h, the treated wood is obtained; the delignification solution is a sodium chlorite solution with a mass fraction of 2.5% to 3.5%; ③, using hydrogen peroxide with a mass fraction of 7 to 25% to bleach the treated wood, The bleached wood is obtained; ④, the bleached wood is first rinsed with deionized water for 10s to 30s, and then extracted and dehydrated with a dehydrating agent to obtain a de-lignified wood substrate. Others are the same as the first embodimen...

specific Embodiment approach 3

[0014] Specific embodiment three: the difference between this embodiment and specific embodiment two is: the material of the wood veneer described in step 1. is basswood, and density is 500kg / m 3 ~550kg / m 3 . Others are the same as in the second embodiment.

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Abstract

The invention discloses a preparation method of a wood-based selective near-infrared absorption material, which belongs to the technical field of wood modification, and particularly relates to a preparation method of a transparent wood material. The invention aims to solve the problem that the existing transparent wood does not have the near-infrared absorption characteristic. The preparation method comprises the following steps: 1, removing chromophoric groups to obtain a delignified wood substrate; 2, preparing resin doped with a near-infrared heat absorption material; and 3, dipping the delignified wood substrate into resin doped with a near-infrared heat absorption material, then adding a curing agent and ethanol, carrying out vacuum permeation-pressurized permeation cyclic treatment,and then carrying out normal-pressure curing, so as to obtain the wood-based selective near-infrared absorption material. The invention has the advantages that: 1, the light transmittance can reach more than 85 percent, and the near-infrared absorption rate exceeds 85 percent; 2, the mechanical property of the wood is enhanced to a great extent, and the heat conductivity coefficient is only 0.175W / (m.K); and 3, the cost is low, the process is simple and the preparation period is short. The method is mainly used for preparing the wood-based selective near-infrared absorption material.

Description

technical field [0001] The invention belongs to the technical field of wood modification, and in particular relates to a preparation method of a transparent wood material. Background technique [0002] Wood is a natural polymer material with high mechanical strength, low thermal conductivity and many micro-nano pore structures. Its main chemical components are cellulose, hemicellulose and lignin. At present, there are very few studies on the transparent modification of wood at home and abroad, and they generally face the problem of insufficient polymer penetration. Using vacuum infiltration or pressure infiltration alone, the cost is high and the penetration effect is poor, and the existing transparent wood Does not have near-infrared absorption properties. Contents of the invention [0003] The purpose of the present invention is to solve the problem that the existing transparent wood does not have near-infrared absorption characteristics, and to provide a preparation m...

Claims

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Application Information

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IPC IPC(8): B27K3/52B27K5/00B27K5/04
CPCB27K3/52B27K5/00B27K5/001B27K5/04
Inventor 王怀远陆袁威王美琪田雪峰廖圆圆
Owner 王怀远
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