Preparation method of ultraviolet-shielding transparent wood

An external shielding, wood technology, applied in the direction of wood treatment, wood impregnation, wood impregnation, etc., can solve the problem of no relevant articles or reports, and achieve the effect of improving social application value, reducing damage and increasing added value.

Inactive Publication Date: 2019-08-23
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Regarding the UV shielding properties of transparent wo

Method used

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  • Preparation method of ultraviolet-shielding transparent wood
  • Preparation method of ultraviolet-shielding transparent wood
  • Preparation method of ultraviolet-shielding transparent wood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) First immerse the sample in 5% sodium hydroxide solution and react at 100℃ for 80min;

[0031] (2) Wash the sample after the pretreatment treatment to neutrality, put a sufficient mass fraction of 7% sodium chlorite, and treat it under acidic conditions (pH 4), the treatment time is 1h, and the lignin is measured The content is 6.68%;

[0032] (3) Wash the treated wood with distilled water to neutrality, and then use the organic solvent gradient method (40% ethanol, 60% ethanol, 80% ethanol, pure ethanol, ethanol: acetone 1:1, pure acetone, no polymerization initiated The monomer of the dipping liquid) is dehydrated;

[0033] (4) Then the decolorized wood is immersed in pre-polymerized methyl methacrylate (MMA) for 4 hours and cured at 50°C to obtain a UV-shielding transparent wood.

[0034] The obtained ultraviolet shielding transparent wood has a light transmittance of less than 5% in the short-wave and medium-wave ultraviolet region (200nm~320nm), and has a light transm...

Embodiment 2

[0036] The preparation of UV-shielding transparent wood includes the following steps:

[0037] (1) First immerse the sample in 5% sodium hydroxide solution and react at 100℃ for 80min;

[0038] (2) Wash the sample after pretreatment treatment to neutrality, put a sufficient mass fraction of 7% sodium chlorite, and treat it under acidic conditions (pH 4). The treatment time is 1.5h. The vegetarian content is 2.36%;

[0039] (3) Wash the treated wood with distilled water to neutrality, and then use the organic solvent gradient method (40% ethanol, 60% ethanol, 80% ethanol, pure ethanol, ethanol: acetone 1:1, pure acetone, no polymerization initiated The monomer of the dipping liquid) is dehydrated;

[0040] (4) Then the decolorized wood is immersed in pre-polymerized MMA for 4 hours and cured at 50°C to obtain a UV-shielding transparent wood.

[0041] The obtained UV-shielding transparent wood has a light transmittance of less than 5% in the short-wave and medium-wave ultraviolet region...

Embodiment 3

[0043] The preparation of UV-shielding transparent wood includes the following steps:

[0044] (1) First immerse the sample in 5% sodium hydroxide solution and react at 100℃ for 80min;

[0045] (2) Wash the sample after the pretreatment treatment to neutrality, put a sufficient mass fraction of 7% sodium chlorite, and treat it under acidic conditions (pH 4), the treatment time is 2h, and the lignin is measured The content is 0.23%;

[0046] (3) Wash the treated wood with distilled water to neutrality, and then use the organic solvent gradient method (40% ethanol, 60% ethanol, 80% ethanol, pure ethanol, ethanol: acetone 1:1, pure acetone, no polymerization initiated The monomer of the dipping liquid) is dehydrated;

[0047] (4) Then the decolorized wood is immersed in pre-polymerized MMA for 4 hours and cured at 50°C to obtain a UV-shielding transparent wood.

[0048] The obtained ultraviolet shielding transparent wood has a light transmittance of less than 5% in the short-wave and med...

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Abstract

The invention discloses a preparation method of ultraviolet-shielding transparent wood. The preparation method comprises the following steps: firstly, pretreating wood sample to swell the wood samples, then treating the swelled wood samples by sodium chlorite and glacial acetic, and controlling a delignification process to obtain wood substrates with different lignin content; carrying out dehydration treatment on the sample by adopting an organic solvent gradient method, a freeze drying method or a supercritical drying method to further obtain dehydrated wood substrates with different lignin content; and carrying out dipping by using a pre-polymer which has a refractive index close to the fiber refractive index of a fiber and has high optical transmittance, and then carrying out curing. Through exploration of the ultraviolet shielding property of the transparent wood with different lignin content, the transparent wood with an ultraviolet shielding function is obtained. The obtained ultraviolet-shielding transparent wood has extremely good ultraviolet shielding characteristic and high light transmission, wherein the ultraviolet shielding effect reaches 90%, and light transmittance reaches 73% or above.

Description

Technical field [0001] The invention belongs to the technical field of wood technology development and modification, and specifically relates to a preparation method of ultraviolet shielding transparent wood. Background technique [0002] Wood is a natural polymer material with anisotropic properties, mainly composed of cellulose, hemicellulose and lignin. Among them, cellulose extends in an orderly manner along the growth direction of the plant. Lignin and hemifibrin are used as fillers and binding agents together. They are distributed between the microfibrils of the cell wall and the intercellular layer, bonding adjacent cells together, giving cells and Plants have great mechanical strength. [0003] The present invention aims to prepare a UV-shielding transparent wood, and the main technical problems involved mainly include two points, one is the regulation of the UV-shielding property of the wood, and the other is the wood light-transmitting modification of the wood. [0004] F...

Claims

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Application Information

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IPC IPC(8): B27K3/02B27K3/20B27K3/32B27K5/00B27K5/04B27K3/34B27K3/50
CPCB27K3/0207B27K3/20B27K3/32B27K3/34B27K3/50B27K5/0005B27K5/04B27K2240/90
Inventor 殷学风范晶田杏欢林涛袁枚李静王忠祥
Owner SHAANXI UNIV OF SCI & TECH
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