Carbon-quantum-dot-optimized furfuryl-alcohol-modified wood and preparation method therefor
By using carbon quantum dot catalysts to catalyze furfuryl alcohol-modified wood, the problems of decreased toughness and blackening of wood color in furfuryl alcohol-modified wood have been solved, achieving overall performance optimization of wood. The preparation method is simple and low in cost.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- BEIJING FORESTRY UNIVERSITY
- Filing Date
- 2025-04-02
- Publication Date
- 2026-07-16
AI Technical Summary
The reduced toughness and blackening of furfuryl alcohol-modified wood, coupled with the harsh and limited functionality of traditional catalysts, have restricted the widespread application of wood modification technologies.
Using carbon quantum dots as a catalyst, wood is treated by vacuum pressure impregnation and then aged and cured at room temperature. The carbon quantum dots are modified with hydroxyl, carboxyl and BF4- ions, which catalyze the curing of furfuryl alcohol in the wood, thereby improving toughness and resistance to biological degradation.
It achieves an overall balance of dimensional stability, strength, toughness and resistance to biological degradation of wood, improves the problem of decreased toughness of furfuryl alcohol-modified wood, and solves the problem of wood color turning black. The preparation method is simple and low cost.
Smart Images
Figure CN2025086839_16072026_PF_FP_ABST
Abstract
Description
A carbon quantum dot-optimized furfuryl alcohol modified material and its preparation method Technical Field
[0001] This invention belongs to the field of wood modification technology, specifically relating to a carbon quantum dot-optimized furfuryl alcohol-modified wood and its preparation method. Background Technology
[0002] The information disclosed in this background section is intended only to enhance understanding of the overall background of the invention and is not necessarily to be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art.
[0003] Wood, as a renewable and recyclable green material, is widely used in construction, furniture, decoration, and other fields due to its excellent physical and mechanical properties and unique environmental characteristics, such as high strength-to-weight ratio, ease of processing, and beautiful texture. However, the main components of wood contain a large number of hygroscopic groups, leading to dimensional instability, deformation, cracking, and microbial deterioration such as mold and decay. Therefore, to avoid these problems, wood needs to be modified.
[0004] Furfuryl alcohol modification of wood involves using furfuryl alcohol as a modifier, compounding it with a catalyst, and impregnating and filling the cell cavities and cell walls of wood. Upon heating, the mixture solidifies into furfuryl alcohol resin within the wood, thereby improving its properties. The furfuryl alcohol modification process is simple, significantly improving dimensional stability, compressive strength along the grain, and resistance to biological degradation. Furthermore, the modifier is derived from agricultural residues, making it widely available, low in toxicity, and environmentally friendly, thus attracting industry attention. Commercial production has been achieved in some European countries and the United States. However, due to the inherent brittleness of furfuryl alcohol resin and the use of acidic catalysts and heating conditions during the modification process, the toughness of the modified wood decreases significantly. When the weight gain of furfuryl alcohol-modified wood reaches 70%, the impact toughness of the wood can decrease by 57%. Currently, methods such as removing lignin from the wood and introducing flexible polymers can alleviate the decrease in toughness to some extent, but the effects are not ideal, and the processes are complex and difficult to scale up for industrial production. To date, no research has been conducted on designing catalysts to improve the toughness of furfuryl alcohol-modified wood. Furthermore, traditional catalysts such as sulfuric acid and maleic anhydride exhibit vigorous reactions and limited functionality, which restricts the widespread application of furfuryl alcohol modification technology in the wood modification industry. Therefore, designing mild, multi-functional catalysts to optimize furfuryl alcohol modification technology for wood has significant practical application value. Summary of the Invention
[0005] The purpose of this invention is to solve the problem of decreased toughness in furfuryl alcohol-modified wood. By designing a novel catalyst, the overall balance and optimization of wood dimensional stability, strength, toughness, and resistance to biological degradation are achieved, and the problem of wood color turning black is solved. This invention provides a carbon quantum dot-optimized furfuryl alcohol-modified wood and its preparation method.
[0006] This invention is achieved through the following technical solution:
[0007] In a first aspect, this invention proposes a method for preparing carbon quantum dot-optimized furfuryl alcohol-modified wood. The method involves treating wood with a carbon quantum dot / furfuryl alcohol-modified liquid via vacuum pressure impregnation, then wrapping the wood with a high-temperature resistant and waterproof material and aging it at room temperature to allow the modifiers (carbon quantum dots and furfuryl alcohol) to better penetrate the wood cell walls. The wood is then placed in a drying oven or kiln for heating and curing to obtain the carbon quantum dot-optimized furfuryl alcohol-modified wood. The method for obtaining the carbon quantum dot / furfuryl alcohol-modified liquid includes mixing carbon quantum dots, furfuryl alcohol, and water to obtain the carbon quantum dot / furfuryl alcohol-modified liquid.
[0008] Furthermore, the carbon quantum dots are surface-ion-modified carbon quantum dots.
[0009] Furthermore, the surface of the carbon quantum dots contains hydroxyl groups, carboxyl groups, and ions.
[0010] Furthermore, the ion is BF4. - .
[0011] Furthermore, the method for obtaining the carbon quantum dots is as follows: using polybasic organic acids and fluoroborates as raw materials, dissolving them in water by ultrasound, and then reacting them by heating to obtain carbon quantum dots.
[0012] Furthermore, in the carbon quantum dot / furfuryl alcohol modified solution, the concentration of carbon quantum dots is 0.5% to 5% by mass percentage, the concentration of furfuryl alcohol is 10% to 70%, and the concentration of water is 25% to 89.5%.
[0013] Furthermore, the vacuum pressure impregnation method is as follows: first, vacuum treatment is performed for 30 to 120 minutes under a vacuum degree of -0.05 to -0.1 MPa, then the carbon quantum dot / furfuryl alcohol modified liquid is introduced, and then pressure treatment is performed for 60 to 180 minutes under a pressure of 0.3 to 2 MPa.
[0014] Furthermore, the high-temperature resistant and waterproof material is tin foil and / or silicone paper, and the room temperature aging time is 12 to 72 hours.
[0015] The heat curing process is as follows: first, treat at 60-80℃ for 1-5 hours, then treat at 100-120℃ for 5-24 hours, and finally, remove the high-temperature resistant waterproof material and dry at 40-80℃ to constant weight.
[0016] Secondly, the present invention proposes a carbon quantum dot-optimized furfuryl alcohol modified material prepared by the above-mentioned method for preparing carbon quantum dot-optimized furfuryl alcohol modified material.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] Carbon quantum dots (CQDs) are zero-dimensional carbon nanomaterials mainly composed of C, H, and O elements. They possess advantages such as small particle size and large specific surface area, with numerous surface groups providing abundant central active sites for catalysis; they also exhibit excellent electron transfer capabilities, serving as both electron acceptors and donors. Furthermore, CQDs exhibit good hydrophilicity, low toxicity, and are widely available and easily synthesized, making them ideal catalysts. The carbon quantum dot / furfuryl alcohol modified liquid of this invention utilizes carbon quantum dots both as a catalyst for the curing of furfuryl alcohol in wood and as a wood modifier to impart excellent decay resistance to wood, achieving multiple effects with a single agent. Therefore, this invention employs carbon quantum dots to catalyze the curing of furfuryl alcohol monomers, significantly improving the dimensional stability, compressive strength, and resistance to biodegradation of wood, mitigating the problem of decreased toughness, achieving an overall balance and optimization of dimensional stability, strength, toughness, and resistance to biodegradation, and solving the problem of wood discoloration.
[0019] Furthermore, the carbon quantum dot preparation method of this invention is simple, produces no solid byproducts, is time-efficient, and low-cost, making it suitable for large-scale application. The carbon quantum dots of this invention are ion-modified and contain abundant hydroxyl, carboxyl, and BF4 groups on their surface. - Ions can act as acid catalysts and hydrogen bond catalysts, and have good catalytic properties for curing furfuryl alcohol monomers and inhibiting bacteria.
[0020] The carbon quantum dot-optimized furfuryl alcohol-modified wood of this invention solves the problem of decreased toughness of furfuryl alcohol-modified wood, achieves overall balance and optimization of wood's dimensional stability, strength, toughness and resistance to biological degradation, and also solves the problem of the modified wood turning black. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0022] Figure 1 is a schematic diagram of the material color of Comparative Examples 1, 3 and Example 2.
[0023] Figure 2 is a graph showing the flexural strength and modulus of elasticity of the modified materials of Comparative Examples 1, 2 and Example 1.
[0024] Figure 3 is a graph showing the compressive strength along the grain of the modified materials of Comparative Examples 1, 2 and Example 1.
[0025] Figure 4 shows the impact toughness data of the modified materials of Comparative Examples 1, 3 and Example 2.
[0026] Figure 5 shows the corrosion resistance test results of the modified materials of Comparative Examples 1, 3 and Example 2.
[0027] Figure 6 is a graph showing the dimensional stability data of the modified materials of Comparative Example 3 and Example 2. Embodiments of the present invention
[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. The embodiments provide detailed implementation methods and specific operation processes, but the scope of protection of the present invention is not limited to the following embodiments.
[0029] In the following examples, the carbon quantum dot / furfuryl alcohol modified solution is prepared. The carbon quantum dots can be prepared using existing methods, such as the "An Ionic-Based Carbon Quantum Dot and Its Application in Resin Curing" proposed in Chinese Patent Application Publication No. CN118956387A. Using polybasic organic acids and fluoroborates as raw materials, the carbon quantum dots are fully dissolved in water using ultrasound, and then heated in a microwave oven for 3–10 minutes to obtain surface-ion-modified carbon quantum dots. Then, the carbon quantum dots, furfuryl alcohol, and water are mixed in a certain proportion to obtain the carbon quantum dot / furfuryl alcohol modified solution.
[0030] Example 1
[0031] Preparation of carbon quantum dot / furfuryl alcohol modified solution: Using 4 parts oxalic acid and 1 part sodium fluoroborate as raw materials, the solutions were fully dissolved in water by ultrasonication and then heated in a microwave oven for 5 minutes to obtain surface ion-modified carbon quantum dots. A carbon quantum dot / furfuryl alcohol modified solution was prepared by stirring with a glass rod according to the following mass percentages: carbon quantum dot concentration 1.25%, furfuryl alcohol concentration 15%, and the remainder water, resulting in a homogeneous, clear yellow solution.
[0032] Wood processing and characterization: Poplar was selected and the wood was processed into wood with dimensions of 20mm (axial) × 20mm (tangential) × 20mm (radial), 80mm (axial) × 10mm (tangential) × 4mm (radial), and 30mm (axial) × 20mm (tangential) × 20mm (radial).
[0033] Vacuum pressure impregnation of wood: Vacuum treatment was performed for 45 minutes at a vacuum of -0.05 MPa, followed by the introduction of a carbon quantum dot / furfuryl alcohol modified solution, and then pressure treatment was carried out for 90 minutes at 0.5 MPa. After impregnation, excess modifier was wiped off the wood surface, and the wood was wrapped in aluminum foil and aged at room temperature for 48 hours to allow the modifier to better penetrate the wood cell walls. Then, the wood was placed in a drying oven for heat curing, first treated at 80℃ for 2 hours, and then at 105℃ for 10 hours. The aluminum foil was removed, and finally, the wood was dried at 80℃ to constant weight, thus obtaining carbon quantum dot-optimized furfuryl alcohol modified wood.
[0034] Example 2
[0035] Preparation of carbon quantum dot / furfuryl alcohol modified solution: Using 3 parts citric acid and 2 parts sodium fluoroborate as raw materials, the solutions were fully dissolved in water by ultrasonication, and then heated in a microwave oven for 8 minutes to obtain surface ion-modified carbon quantum dots. A carbon quantum dot / furfuryl alcohol modified solution was prepared by stirring with a glass rod according to the following mass percentages: carbon quantum dot concentration 2.5%, furfuryl alcohol concentration 30%, and the remainder water, yielding a homogeneous, clear, yellow solution.
[0036] Wood processing and characterization: Radiata pine was selected and processed into wood with dimensions of 20mm (axial) × 20mm (tangential) × 20mm (radial), 80mm (axial) × 10mm (tangential) × 4mm (radial), and 30mm (axial) × 20mm (tangential) × 20mm (radial).
[0037] Vacuum pressure impregnation of wood: Vacuum treatment was performed for 60 minutes under a vacuum of -0.1 MPa, followed by introduction of carbon quantum dot / furfuryl alcohol modified solution, and then pressure treatment was carried out for 120 minutes under a pressure of 0.8 MPa. After impregnation, excess modifier was wiped off the wood surface, and the wood was wrapped in aluminum foil and aged at room temperature for 36 hours to allow the modifier to better penetrate the wood cell walls. Then, the wood was placed in a drying oven for heat curing, first treated at 60℃ for 2 hours, and then at 110℃ for 10 hours. The aluminum foil was removed, and finally, the wood was dried at 60℃ to constant weight, thus obtaining carbon quantum dot-optimized furfuryl alcohol modified wood.
[0038] Example 3
[0039] Preparation of carbon quantum dot / furfuryl alcohol modified solution: Using 5 parts citric acid and 2 parts ammonium fluoroborate as raw materials, the solutions were fully dissolved in water by ultrasonication, and then heated in a microwave oven for 12 minutes to obtain surface ion-modified carbon quantum dots. A carbon quantum dot / furfuryl alcohol modified solution was prepared by stirring with a glass rod according to the following mass percentages: carbon quantum dot concentration 0.5%, furfuryl alcohol concentration 10%, and the remainder water, resulting in a homogeneous, clear, yellow solution.
[0040] Wood processing and characterization: Selected Pinus sylvestris, the wood was processed into wood with dimensions of 20mm (axial) × 20mm (tangential) × 20mm (radial), 80mm (axial) × 10mm (tangential) × 4mm (radial), and 30mm (axial) × 20mm (tangential) × 20mm (radial);
[0041] Vacuum pressure impregnation of wood: Vacuum treatment was performed for 30 minutes under a vacuum of -0.08 MPa, followed by the introduction of carbon quantum dot / furfuryl alcohol modified solution, and then pressure treatment was performed for 60 minutes under a pressure of 0.3 MPa. After impregnation, excess modifier was wiped off the wood surface, and the wood was wrapped with silicone paper and aged at room temperature for 72 hours to allow the modifier to better penetrate into the wood cell walls. Then, the wood was placed in a drying oven for heat curing, first treated at 60℃ for 2 hours, and then treated at 120℃ for 15 hours. The silicone paper was removed, and finally dried at 40℃ to constant weight to obtain carbon quantum dot-optimized furfuryl alcohol modified wood.
[0042] Example 4
[0043] Preparation of carbon quantum dot / furfuryl alcohol modified solution: Using 2 parts oxalic acid and 1 part ammonium fluoroborate as raw materials, the solutions were fully dissolved in water by ultrasonication, and then heated in a microwave oven for 8 minutes to obtain surface ion-modified carbon quantum dots. A carbon quantum dot / furfuryl alcohol modified solution was prepared by stirring with a glass rod according to the following mass percentages: 5% carbon quantum dot concentration, 70% furfuryl alcohol concentration, and the remainder being water, resulting in a homogeneous, clear, yellow solution.
[0044] Wood processing and characterization: Eucalyptus wood was selected and processed into wood with dimensions of 20mm (axial) × 20mm (tangential) × 20mm (radial), 80mm (axial) × 10mm (tangential) × 4mm (radial), and 30mm (axial) × 20mm (tangential) × 20mm (radial).
[0045] Vacuum pressure impregnation of wood: Vacuum treatment was performed for 120 min at a vacuum of -0.1 MPa, followed by introduction of carbon quantum dot / furfuryl alcohol modified solution, and then pressure treatment was carried out for 180 min at 1.5 MPa. After impregnation, excess modifier was wiped off the wood surface, and the wood was wrapped in aluminum foil and aged at room temperature for 72 h to allow the modifier to better penetrate the wood cell walls. Then, the wood was placed in a drying oven for heat curing, first treated at 80℃ for 5 h, and then at 110℃ for 20 h. The aluminum foil was removed, and finally dried at 50℃ to constant weight, thus obtaining carbon quantum dot-optimized furfuryl alcohol modified wood.
[0046] Example 5
[0047] Preparation of carbon quantum dot / furfuryl alcohol modified solution: Using 2 parts oxalic acid and 1 part ammonium fluoroborate as raw materials, the solutions were fully dissolved in water by ultrasonication, and then heated in a microwave oven for 10 minutes to obtain surface ion-modified carbon quantum dots. A carbon quantum dot / furfuryl alcohol modified solution was prepared by stirring with a glass rod according to the following mass percentages: carbon quantum dot concentration 3%, furfuryl alcohol concentration 50%, and the remainder water, yielding a homogeneous, clear, yellow solution.
[0048] Wood processing and characterization: Poplar was selected and the wood was processed into wood with dimensions of 20mm (axial) × 20mm (tangential) × 20mm (radial), 80mm (axial) × 10mm (tangential) × 4mm (radial), and 30mm (axial) × 20mm (tangential) × 20mm (radial).
[0049] Vacuum pressure impregnation of wood: Vacuum treatment was performed for 100 min at a vacuum of -0.08 MPa, followed by introduction of carbon quantum dot / furfuryl alcohol modified solution, and then pressure treatment was carried out for 160 min at 1.2 MPa. After impregnation, excess modifier was wiped off the wood surface, and the wood was wrapped with silicone paper and aged at room temperature for 60 h to allow the modifier to better penetrate the wood cell walls. Then, the wood was placed in a drying oven for heat curing, first treated at 70℃ for 4 h, and then at 120℃ for 15 h. The silicone paper was removed, and finally dried at 70℃ to constant weight, thus obtaining carbon quantum dot-optimized furfuryl alcohol modified wood.
[0050] Example 6
[0051] Preparation of carbon quantum dot / furfuryl alcohol modified solution: Using 4 parts oxalic acid and 1 part ammonium fluoroborate as raw materials, the solutions were fully dissolved in water by ultrasonication, and then heated in a microwave oven for 10 minutes to obtain surface ion-modified carbon quantum dots. A carbon quantum dot / furfuryl alcohol modified solution was prepared by stirring with a glass rod according to the following mass percentages: carbon quantum dot concentration 1.5%, furfuryl alcohol concentration 20%, and the remainder water, yielding a homogeneous, clear, yellow solution.
[0052] Wood processing and characterization: Radiata pine was selected and processed into wood with dimensions of 20mm (axial) × 20mm (tangential) × 20mm (radial), 80mm (axial) × 10mm (tangential) × 4mm (radial), and 30mm (axial) × 20mm (tangential) × 20mm (radial).
[0053] Vacuum pressure impregnation of wood: Vacuum treatment was performed for 30 minutes at a vacuum of -0.1 MPa, followed by introduction of carbon quantum dot / furfuryl alcohol modified solution, and then pressure treatment was carried out for 60 minutes at 1.5 MPa. After impregnation, excess modifier was wiped off the wood surface, and the wood was wrapped in silicone paper and aged at room temperature for 12 hours to allow the modifier to better penetrate the wood cell walls. Then, the wood was placed in a drying oven for heat curing, first treated at 80℃ for 4 hours, and then at 100℃ for 9 hours. The silicone paper was removed, and finally, the wood was dried at 50℃ to constant weight, thus obtaining carbon quantum dot-optimized furfuryl alcohol modified wood.
[0054] It should be noted that for the processing and characterization of wood, bark-free wood can be selected. If it is a heartwood species, sapwood should be selected as much as possible, and the wood should be sawn into specimens of a certain size. Broadleaf woods such as poplar, oak, and eucalyptus can be selected, as well as coniferous woods such as cedar, radiata pine, and larch.
[0055] In the above embodiments, during vacuum pressure impregnation of wood, the carbon quantum dot / furfuryl alcohol modified solution can be treated with the wood using a vacuum pressure impregnation method. After impregnation, excess modifier on the wood surface is wiped off with a paper towel. The wood is then aged at room temperature to allow the modifier to better penetrate the wood cell walls. Finally, the wood is placed in a drying oven for heat curing treatment, thereby obtaining carbon quantum dot-optimized furfuryl alcohol modified material. The physical and mechanical properties of the modified material, including impact toughness, flexural strength and modulus of elasticity, compressive strength, dimensional stability, and corrosion resistance, are all improved.
[0056] Comparative Example 1
[0057] Untreated wood was dried to constant weight at 103°C to prepare physical and mechanical test specimens of the above dimensions.
[0058] Comparative Example 2
[0059] By mass percentage, the concentration of maleic anhydride was 1.25%, the concentration of furfuryl alcohol was 15%, and the remainder was water, to obtain a homogeneous pale yellow clear solution; then the wood was impregnated under vacuum pressure as in Example 1.
[0060] Comparative Example 3
[0061] By mass percentage, the concentration of maleic anhydride was 2.5%, the concentration of furfuryl alcohol was 30%, and the remainder was water, to obtain a homogeneous pale yellow clear solution; then the wood was impregnated under vacuum pressure as in Example 2.
[0062] After modification treatment, the weight gain, volume increase, and density change rates of Examples 1 and 2 and Comparative Examples 2 and 3 are shown in Table 1. As can be seen from the table, the weight gain and volume increase rates of Example 2, using carbon quantum dots as a catalyst, are both greater than those of Comparative Example 3, which uses a traditional catalyst. The density change rate indicates that the density changes of both are basically the same. Similarly, Examples 1 and Comparative Example 2 also show similar changes. This indicates that the carbon quantum dot catalyst can successfully solidify furfuryl alcohol inside the wood and exert a strong swelling effect on the cell wall.
[0063] Table 1 shows the weight gain rate, volume increase rate, and density change rate for Examples 1 and 2 and Comparative Examples 2 and 3.
[0064] Weight gain rate (%) Volume gain rate (%) Density change rate (%) Example 1 22.1 (±2.1) 9.8 (±0.7) 11.1 (±1.8) Example 2 53.1 (±7.2) 16.2 (±2.9) 30.1 (±2.4) Comparative Example 2 20.4 (±1.3) 5.5 (±1.1) 13.3 (±1.9) Comparative Example 3 47.2 (±2.7) 12.0 (±0.7) 31.5 (±3.5)
[0065] Figure 1 is a schematic diagram of the material color of Comparative Examples 1, 3 and Example 2. As can be seen from Figure 1, Comparative Example 3 is black, which is a darker color, while Example 2, which uses carbon quantum dots as a catalyst, is brown, which improves the problem of the furfuryl alcohol modified material turning black.
[0066] Figure 2 is a schematic diagram of the flexural strength and elastic modulus of Comparative Examples 1, 2 and Example 1. As can be seen from Figure 2, the flexural strength and elastic modulus of Example 1, which uses carbon quantum dots as a catalyst, are both greater than those of Comparative Example 2.
[0067] Figure 3 is a schematic diagram of the parallel compressive strength of Comparative Examples 1, 2 and Example 1. As can be seen from Figure 3, the parallel compressive strength of Example 1, which uses carbon quantum dots as a catalyst, is greater than that of Comparative Example 2.
[0068] Figure 4 is a schematic diagram of the impact toughness of Comparative Examples 1, 3 and Example 2. As can be seen from Figure 4, the toughness of Comparative Example 3 decreased by 35%, while the toughness of Example 2, which uses carbon quantum dots as a catalyst, increased by 38% compared with Comparative Example 3, and even exceeded that of the untreated material. This is mainly due to the interaction between carbon quantum dots and wood.
[0069] Figure 5 is a schematic diagram of the corrosion resistance of Comparative Examples 1, 3 and Example 2. As can be seen from Figure 5, Comparative Example 3 has a certain degree of corrosion resistance, while Example 2, which uses carbon quantum dots as a catalyst, has excellent corrosion resistance and achieves a bactericidal effect.
[0070] Figure 6 is a schematic diagram of the dimensional stability of Comparative Example 3 and Example 2. As can be seen from Figure 6, compared with Comparative Example 2, the anti-swelling rate of Example 2, which uses carbon quantum dots as a catalyst, increased by 22% and reached 80%. This indicates that the carbon quantum dot-optimized furfuryl alcohol modified material has good dimensional stability.
Claims
1. A method for preparing carbon quantum dot-optimized furfuryl alcohol modified material, characterized in that, Wood was treated by vacuum pressure impregnation with carbon quantum dot / furfuryl alcohol modified liquid, then wrapped with high temperature resistant and waterproof material and aged at room temperature. Finally, the wood was placed in a drying oven or drying kiln for heating and curing to obtain carbon quantum dot optimized furfuryl alcohol modified material. The method for obtaining the carbon quantum dot / furfuryl alcohol modified solution includes: mixing carbon quantum dots, furfuryl alcohol and water to obtain the carbon quantum dot / furfuryl alcohol modified solution.
2. The preparation method of the carbon quantum dot-optimized furfuryl alcohol modified material as described in claim 1, characterized in that, The carbon quantum dots are surface-ion-modified carbon quantum dots.
3. The preparation method of carbon quantum dot-optimized furfuryl alcohol modified material as described in claim 2, characterized in that, The surface of the carbon quantum dots contains hydroxyl groups, carboxyl groups, and ions.
4. The preparation method of carbon quantum dot-optimized furfuryl alcohol modified material as described in claim 3, characterized in that, The ion is BF4. - .
5. The preparation method of a carbon quantum dot-optimized furfuryl alcohol modified material as described in claim 1, characterized in that, The method for obtaining carbon quantum dots is as follows: using polybasic organic acids and fluoroborates as raw materials, dissolving them in water by ultrasound, and then reacting them by heating to obtain carbon quantum dots.
6. The method for preparing a carbon quantum dot-optimized furfuryl alcohol modified material as described in claim 1, characterized in that, In the carbon quantum dot / furfuryl alcohol modified solution, the concentration of carbon quantum dots is 0.5% to 5% by mass percentage, the concentration of furfuryl alcohol is 10% to 70%, and the concentration of water is 25% to 89.5%.
7. The method for preparing a carbon quantum dot-optimized furfuryl alcohol modified material as described in claim 1, characterized in that, The vacuum pressure impregnation procedure is as follows: first, vacuum treatment is carried out for 30 to 120 minutes under a vacuum degree of -0.05 to -0.1 MPa, then the carbon quantum dot / furfuryl alcohol modified liquid is introduced, and then pressure treatment is carried out for 60 to 180 minutes under a pressure of 0.3 to 2 MPa.
8. The preparation method of a carbon quantum dot-optimized furfuryl alcohol modified material as described in claim 1, characterized in that, The high-temperature resistant and waterproof material is tin foil and / or silicone paper, and the room temperature aging time is 12 to 72 hours.
9. The preparation method of furfuryl alcohol modified material based on carbon quantum dots as described in claim 1, characterized in that, The heat curing process is as follows: first, treat at 60-80℃ for 1-5 hours, then treat at 100-120℃ for 5-24 hours, and finally, remove the high-temperature resistant waterproof material and dry at 40-80℃ to constant weight.
10. A method for preparing a carbon quantum dot-optimized furfuryl alcohol modified material according to any one of claims 1-9, wherein the carbon quantum dot-optimized furfuryl alcohol modified material is prepared.