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Preparation method of multicolor fluorescent transparent wood based on carbon quantum dots and transparent wood

A technology of carbon quantum dots and fluorescence, which is applied in the field of transparent wood, can solve the problems of limited use, single fluorescence, and inability to change color, and achieve the effect of shortening the curing time and simplifying the curing process

Active Publication Date: 2021-10-01
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current fluorescent transparent wood based on carbon quantum has a single fluorescence, cannot change color, and cannot be used in all industries, which limits its use.

Method used

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  • Preparation method of multicolor fluorescent transparent wood based on carbon quantum dots and transparent wood

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The preparation method of multi-color fluorescent transparent wood based on carbon quantum dots comprises the following steps:

[0033] (1): Select a poplar veneer sample with a size of 20mm*20mm*1.5mm, and dry it at 80°C for 12 hours to a dry state. The density of the veneer sample after drying is 0.087g / cm 3 spare;

[0034] (2): Mix 20g of sodium hypochlorite and 500ml of distilled water and stir evenly. Use glacial acetic acid to adjust the pH of the mixed solution to 4.6 to obtain a delignification aqueous solution. Soak 1.044g of veneer samples dried in step (1) in the delignification In the plain aqueous solution, heat in a water bath at 85°C for 8 hours for delignification treatment, until the veneer sample is white;

[0035] (3): The veneer sample that has been delignified in step (2) is taken out, rinsed with deionized water and stored in absolute ethanol for dehydration treatment to obtain a delignified veneer template;

[0036] (4): Weigh 0.1g of alkali lig...

Embodiment 2

[0041] (1): Select a poplar veneer sample with a size of 20mm*20mm*1.5mm, and dry it at 85°C for 12 hours to a dry state. The density of the veneer sample after drying is 0.087g / cm 3 spare;

[0042] (2): Mix 20g of sodium hypochlorite and 500ml of distilled water and stir evenly. Use glacial acetic acid to adjust the pH of the mixed solution to 4.6 to obtain a delignification aqueous solution. Soak 1.044g of veneer samples dried in step (1) in the delignification In the plain aqueous solution, heat in a water bath at 85°C for 8 hours for delignification treatment, until the veneer sample is white;

[0043] (3): The veneer sample that has been delignified in step (2) is taken out, rinsed with deionized water and stored in absolute ethanol for dehydration treatment to obtain a delignified veneer template;

[0044](4): Weigh 0.1g of alkali lignin, 0.3g of o-phenylenediamine and 0.3g of terephthalic acid, add them to 10ml of absolute ethanol, mix them evenly, and place them in a ...

Embodiment 3

[0049] (1): Select a poplar veneer sample with a size of 20mm*20mm*1.5mm, and dry it at 90°C for 12 hours to a dry state. The density of the veneer sample after drying is 0.087g / cm 3 spare;

[0050] (2): Mix 20g of sodium hypochlorite and 500ml of distilled water and stir evenly. Use glacial acetic acid to adjust the pH of the mixed solution to 4.6 to obtain a delignification aqueous solution. Soak 1.044g of veneer samples dried in step (1) in the delignification In the plain aqueous solution, heat in a water bath at 85°C for 8 hours for delignification treatment, until the veneer sample is white;

[0051] (3): The veneer sample that has been delignified in step (2) is taken out, rinsed with deionized water and stored in absolute ethanol for dehydration treatment to obtain a delignified veneer template;

[0052] (4): Weigh 0.1g of alkali lignin and 0.3g of p-phenylenediamine into 10ml of sulfuric acid solution with a concentration of 40wt% and mix evenly, and place them in a ...

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Abstract

The invention provides a preparation method of multicolor fluorescent transparent wood based on carbon quantum dots and a transparent wood. According to the method, the method comprises the steps of subjecting wood to conventional drying treatment, soaking the dried wood in a mixed solution of pure water, sodium hypochlorite and glacial acetic acid, and obtaining delignification veneer through subsequent steps such as dehydration; carrying out dehydration carbonization reaction on lignin and different nitrogen-containing compounds by using a solvothermal method to prepare carbon quantum dot solutions with different fluorescence properties, and then carrying out vacuum impregnation on delignification veneers in the carbon quantum dot solutions so that carbon quantum dots are uniformly distributed on the inner surfaces of wood cell cavities; and then soaking the delignification veneer in light-cured resin, cell cavities of the light-cured resin are filled with the delignification veneer, and the multicolor fluorescent transparent wood based on the carbon quantum is obtained after ultraviolet curing. According to the invention, alkali lignin is used as a carbon source to prepare green and orange red light-emitting carbon quantum dots, and the carbon quantum dots are mixed according to different proportions to expand the multicolor carbon quantum dot impregnation liquid.

Description

technical field [0001] The invention belongs to the field of new wood technology development and modification, in particular to a preparation method of multi-color fluorescent transparent wood based on carbon quantum dots and transparent wood. Background technique [0002] Forest resources are renewable energy, and wood, as a widespread natural material, is widely used in various fields. The hierarchical porous structure and chemical functionality of wood's internal cellulose framework endow it with broader modifiability. With the help of this special structure, researchers expect to broaden its function and application fields by modifying wood. [0003] Transparent wood is a new type of material based on wood modification, which can basically retain the mechanical properties of wood and has high light transmittance. Transparent wood is prepared by injecting a transparent polymer whose refractive index matches the sample cell wall composition into delignified wood to fill ...

Claims

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Application Information

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IPC IPC(8): B27K3/08B27K3/02B27K3/50B27K3/36B27K3/20B27K3/52B27K3/38B27K3/42B27K5/04B27K5/00
CPCB27K3/08B27K3/025B27K3/0214B27K3/50B27K3/36B27K3/20B27K3/52B27K3/38B27K3/42B27K5/04B27K5/003B27K2240/15B27K2240/00
Inventor 吴燕甘健吴新宇王雅婧王晶张海桥
Owner NANJING FORESTRY UNIV
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