Anticorrosive and mildew-resistant aging-resistant wood board and preparation method thereof

Abstract

The application discloses a kind of preservative mildew-proof aging-resistant wood board and preparation method thereof, comprising: multi-walled carbon nanotube is added to oxidizing agent solution, is mixed sufficiently, oxidation reaction is carried out, and is cleaned using detergent;Antibacterial preservative and emulsifier are added to organic solvent and uniformly mixed, add to chitosan aqueous solution, while keeping sufficient stirring, centrifugal, precipitate, dry, obtain antibacterial preservative microcapsule;Multi-walled carbon nanotube and carboxylic acid derivative are stirred, filter, dry, add antibacterial preservative microcapsule, stir, and uniformly mixed with multi-walled carbon nanotube;The mixture before, wood powder, binder, additive and water are added to stirring kettle and stirred, put into plate mold, and heat solidification;Pressing, effectively enhance the performance and durability of antibacterial preservative, also increase the service life of wood board.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of anti-corrosion and anti-mildew aging wood products, in particular to an anti-corrosion and anti-mildew aging wood board and a preparation method thereof. BACKGROUND

[0002] There are three common methods for treating wood boards to prevent moisture, mildew and bacteria in the prior art: surface treatment: brushing waterproof paint such as asphalt paint and polyurethane paint on the surface of the wood board. This method is simple and easy to implement, but the protection effect on the wood board is limited. Drying treatment: drying the wood board to reduce its water content, thereby achieving the purpose of moisture prevention. This method can effectively prevent wood decay and deformation, but requires professional equipment and operating skills. Chemical corrosion prevention treatment: chemical treatment such as soaking and spraying is performed on the wood board using corrosion inhibitors to make the wood resistant to moisture and corrosion. This method is widely used and has obvious effects, but environmentally friendly corrosion inhibitors need to be used. Edge sealing treatment: the edges of the wood board are sealed using glue or edge strips to prevent moisture from entering. This method is simple and easy to implement, but the selection of suitable materials and bonding techniques needs to be paid attention to.

[0003] However, these methods all use moisture-proof, mildew-proof and antibacterial treatment on the outer surface of the wood board, and the inner part of the wood board is still unprotected. When the outer layer of the wood board is damaged, the inner layer loses its protection, greatly shortening the service life of the wood board. Moreover, the outer layer of the wood board is easily damaged by bumps during use, thereby losing its protective effect and making it prone to moisture, mildew and damage. Therefore, the wood board needs to be replaced or maintained, causing economic losses and being not conducive to the protection of the wood forest. SUMMARY

[0004] The present application overcomes the shortcomings of the prior art and provides an anti-corrosion and anti-mildew aging wood board and a preparation method thereof.

[0005] To achieve the above-mentioned purposes, the technical solution adopted by the present application is as follows: an anti-corrosion and anti-mildew aging wood board and a preparation method thereof, comprising:

[0006] S1: adding multi-walled carbon nanotubes to an oxidizing agent solution, adding them according to the predicted amount one by one, and fully mixing them, then performing an oxidation reaction at normal pressure and high temperature, and cleaning them using a detergent;

[0007] S2: uniformly mixing an antibacterial and anticorrosive agent and an emulsifier in an organic solvent, then slowly adding them to a chitosan aqueous solution while maintaining sufficient stirring, centrifuging, precipitating, and drying to obtain antibacterial and anticorrosive agent microcapsules;

[0008] S3: using ultrasonic stirring to react the multi-walled carbon nanotubes and the carboxylic acid derivative, filtering, drying, adding the antibacterial and anticorrosive agent microcapsules, stirring, and uniformly mixing them with the multi-walled carbon nanotubes;

[0009] S4: the mixture of S3, wood powder, binder, additive and water are added into a stirring kettle for stirring and mixing, and then put into a plate-shaped mold for heat curing;

[0010] S5: the operations of S1-S4 are repeated to obtain a plurality of S4 products, and the S4 products are stacked and pressed.

[0011] In a preferred embodiment of the present application, the oxidation environment of the oxidation reaction in S1 is 40-80°C under normal pressure, and the reaction time is 12-24h.

[0012] In a preferred embodiment of the present application, the detergent in S1 is selected from a detergent with a pH value of 6-8, and repeated washing is performed, and the oxidant solution in S1 is nitric acid solution or potassium permanganate solution.

[0013] In a preferred embodiment of the present application, the chitosan aqueous solution in S2 is prepared by using chitosan, a regulator and deionized water as raw materials, and hydrochloric acid or acetic acid as the regulator, and stirring uniformly by a magnetic stirrer for 30-40min.

[0014] In a preferred embodiment of the present application, the organic solvent in S2 is selected from one of methanol, ethanol or dimethylbenzene.

[0015] In a preferred embodiment of the present application, the chitosan aqueous solution in S2 is heated to 60-70°C before use.

[0016] In a preferred embodiment of the present application, the carboxylic acid derivative in S3 is selected from nano calcium carbonate, and the stirring parameters are all 20-30r / min.

[0017] In a preferred embodiment of the present application, the additive in S4 includes copper phthalocyanine salt, urea formaldehyde and aluminum hydroxide.

[0018] In a preferred embodiment of the present application, the stirring parameters in S4 are 25-45r / min, the heat curing parameters are 60-80min, and the temperature is 75-80°C.

[0019] In a preferred embodiment of the present application, the pressing parameters in S5 are a pressing temperature of 120-180°C, a pressing time of 5-10min, and a pressing pressure of 1.5-2.0MPa.

[0020] In a preferred embodiment of the present application, the pressing parameters in S5 are a pressing temperature of 120-180°C, a pressing time of 5-10min, and a pressing pressure of 1.5-2.0MPa.

[0021] The present application solves the defects in the background art, and has the following beneficial effects:

[0022] (1) The application provides a kind of anti-corrosion and anti-mildew aging wood board and its preparation method, by modifying treatment to multi-walled carbon nanotube, make it have hydrophilic, and the surface of carboxylated multi-walled carbon nanotube has negative charge, thereby again enhancing its adhesion and hydrophilic, then the microcapsule is mixed and attached to, finally wood powder is filled and made into wood board, so that multi-walled carbon nanotube is used as skeleton to uniformly attach antibacterial and anticorrosive microcapsule, then wood powder is filled to obtain anti-corrosion and anti-mildew aging wood board, effectively enhance the performance and durability of antibacterial and anticorrosive, also increase the service life of wood board.

[0023] (2) The application provides a kind of anti-corrosion and anti-mildew aging wood board and its preparation method, by exposing multi-walled carbon nanotube in strong oxidizing agent to carry out oxidation reaction, so that the surface of multi-walled carbon nanotube is modified into hydrophilic functional group by hydroxyl and carboxyl, thereby forming hydroxylated multi-walled carbon nanotube and carboxylated multi-walled carbon nanotube, so that multi-walled carbon nanotube obtains hydrophilic, therefore it will produce adsorption effect on water, constantly produce adsorption effect on water molecules, thereby constantly make the microcapsule on the multi-walled carbon nanotube dissolve and release antibacterial and anticorrosive agent, so as to prevent the breeding of microorganisms such as bacteria and microorganisms which will erode wood board and the corrosion or mildew effect of water molecules on wood board, so as to achieve the protection of wood board from inside to outside.

[0024] (3) The application provides a kind of anti-corrosion and anti-mildew aging wood board and its preparation method, by putting the cured product of S4 into a cuboid mold, and carrying out compression treatment from the top, the internal molecular gap is reduced during compression, and the internal structure is staggered and deformed, the small gap places accumulate to the large gap places, and the up and down and left and right are mixed and staggered, thereby pulling the multi-walled carbon nanotubes inside, so that the multi-walled carbon nanotubes are interwoven to form a network, and finally the wood board is formed, and since the multi-walled carbon nanotubes are interwoven to form a network, the internal structure of the wood board is restrained, so that the wood board is completely integrated, and the strength is enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor;

[0026] Figure 1 is the perspective view of the preferred embodiment of the application; DETAILED DESCRIPTION

[0027] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0028] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can be practiced in other ways different from those described herein, and therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0029] As Figure 1 indicated, a kind of anti-corrosion and mildew resistant aging wood board and its preparation method include:

[0030] S1: multi-walled carbon nanotube is added to oxidizing agent solution, and according to the predicted dosage is added gradually, and is mixed fully, oxidation reaction is carried out under normal pressure high temperature, and is cleaned using detergent;

[0031] In a preferred embodiment of the application, the oxidation environment of the oxidation reaction of S1 is carried out at 40-80 DEG C under normal pressure, and the reaction time is 12-24 h.

[0032] In a preferred embodiment of the application, the detergent in S1 is selected to clean with pH value of 6-8, and repeated cleaning is carried out, and the oxidizing agent solution in S1 is nitric acid solution or potassium permanganate solution.

[0033] It should be noted that the ratio of multi-walled carbon nanotube to oxidizing agent solution is 1:2, and the multi-walled carbon nanotube is exposed to a strong oxidizing agent such as nitric acid solution to carry out oxidation reaction, which can modify the surface of the multi-walled carbon nanotube into hydrophilic functional groups through hydroxyl and carboxyl, thereby forming hydroxylated multi-walled carbon nanotube and carboxylated multi-walled carbon nanotube, so as to make the multi-walled carbon nanotube obtain hydrophilicity, improve the dispersibility and stability of the multi-walled carbon nanotube in water phase.

[0034] S2: antibacterial preservative and emulsifier are added to organic solvent and uniformly mixed, then slowly added to chitosan aqueous solution, while keeping sufficient stirring, centrifuged, precipitated, dried, to obtain antibacterial preservative microcapsule;

[0035] In a preferred embodiment of the application, the chitosan aqueous solution in S2 uses chitosan, adjusting agent and deionized water and other raw materials, uses hydrochloric acid or acetic acid as adjusting agent, and is uniformly stirred by magnetic stirrer for 30-40 min, so as to obtain chitosan aqueous solution.

[0036] It should be noted that the ratio of the antibacterial preservative, the emulsifier and the chitosan aqueous solution is 1:3:6, and in general, hydrochloric acid or acetic acid is used as the adjusting agent to prepare the chitosan aqueous solution.

[0037] 1. Prepare raw materials such as chitosan, adjusting agent and deionized water. In general, hydrochloric acid or acetic acid is used as the adjusting agent to prepare the chitosan aqueous solution.

[0038] 2. A certain amount of chitosan powder is added to deionized water and placed at room temperature for 10-12 hours of standing stirring to make it fully absorb water.

[0039] 3. Add the adjusting agent to the mixture of chitosan and water to control the solubility and pH value of chitosan. For acetic acid, the mixture in step 2 is certainly sufficient, so only a proper amount of acetic acid needs to be added. For hydrochloric acid, a proper amount of hydrochloric acid needs to be diluted to a certain concentration.

[0040] 4. Place the above mixture on a magnetic stirrer to stir uniformly for 30-40 minutes to obtain a chitosan aqueous solution.

[0041] In a preferred embodiment of the present application, the organic solvent in S2 is selected from one of methanol, ethanol or dimethylbenzene.

[0042] In a preferred embodiment of the present application, the chitosan aqueous solution in S2 is preheated to 60-70℃ before use.

[0043] It should be noted that the prepared antibacterial preservative microcapsule is a water-soluble microcapsule. To prepare the water-soluble microcapsule of the antibacterial preservative, a water-soluble polymer needs to be selected as the shell material, and a vesicular structure encapsulating the active substance is formed during the preparation process. In the preparation process, oil droplets containing the antibacterial preservative are suspended in the water phase, and then emulsifiers and stirring methods are used to gradually form micron-sized water / oil mixtures, and water-soluble polymers such as chitosan solution are added. Then, through the formation of an emulsion system, the water-soluble polymer is uniformly embedded in the mixture to form a capsule, and finally, through centrifugation and washing steps, the water-soluble microcapsule with chitosan as the shell layer is obtained.

[0044] S3: Use ultrasonic stirring to react the multi-walled carbon nanotubes and the carboxylic acid derivative, filter, dry, add the antibacterial preservative microcapsule, stir, and uniformly mix with the multi-walled carbon nanotubes;

[0045] In a preferred embodiment of the present application, the carboxylic acid derivative in S3 is selected as nano calcium carbonate, and the parameters of the stirring are all 20-30 r / min.

[0046] It should be noted that the ratio of multi-walled carbon nanotubes to carboxylic acid derivatives is 1:6, the hydrophilic treated multi-walled carbon nanotubes can improve the dispersion and stability in the aqueous phase, thereby enhancing the adsorption performance of the water-soluble microcapsules of the antibacterial preservative, the carboxylated multi-walled carbon nanotubes have negative charges on the surface and have certain hydrophilicity, which can make them more easily interact with the microcapsules, thereby achieving the purpose of adsorbing the antibacterial preservative microcapsules on the surface, and the hydrophilic multi-walled carbon nanotubes and the antibacterial preservative microcapsules are stirred to make the antibacterial preservative microcapsules uniformly adhere to the multi-walled carbon nanotubes, and the carboxylated multi-walled carbon nanotubes have negative charges on the surface, thereby further enhancing the adhesion and hydrophilicity.

[0047] S4: The mixture, wood powder, binder, additive and water of S3 are mixed in a stirring kettle, and then put into a plate-shaped mold and heat solidified.

[0048] In a preferred embodiment of the present application, the additive in S4 includes copper phthalocyanine salt, urea formaldehyde and aluminum hydroxide.

[0049] In a preferred embodiment of the present application, the stirring parameters in S4 are 25r / min-45r / min, the heat solidification parameters are 60min-80min, and the temperature is 75℃-80℃.

[0050] It should be noted that the ratio of the mixture, wood powder, binder, additive and water is 1:1-1.5:0.05-0.2:0-1%:35-50%, and the raw materials need to be fully and uniformly mixed when mixing the materials, and the formula, ratio and stirring time of the materials need to be strictly controlled during the operation to avoid affecting the quality and performance of the product. In addition, during the solidification process, high temperature and humid environment should be avoided to avoid affecting the drying effect and quality of the wood product, and the solidified product is in a fluffy state with many internal voids.

[0051] S5: A plurality of S4 products are obtained by repeating the operations of S1-S4, and the S4 products are stacked and pressed.

[0052] In a preferred embodiment of the present application, the pressing parameters in S5 are a pressing temperature of 120℃-180℃, a pressing time of 5min-10min, and a pressing pressure of 1.5MPa-2.0MPa.

[0053] It should be noted that the cured product in the fluffy state is put into a cuboid mold, and a compression treatment is carried out from the top, the internal molecular gap is reduced during the compression process, and the internal structure is staggered and deformed, the small gap is accumulated to the large gap, and the up and down and left and right are mixed and staggered, so as to pull the internal multi-walled carbon nanotubes, so that the multi-walled carbon nanotubes are intertwined to form a network, and finally the wood board is formed, and because the multi-walled carbon nanotubes are intertwined to form a network, the structure of the wood board is restrained, so that the wood board is completely integrated, and the strength is enhanced.

[0054] Example one,

[0055] The multi-walled carbon nanotubes are added into the oxidant solution, the ratio of multi-walled carbon nanotubes to oxidant solution is 1:2, and the predicted amount is added gradually and mixed thoroughly, and the oxidation reaction is carried out at high temperature under normal pressure, the oxidation environment is between 40-80℃ under normal pressure, the reaction time is 12-24h, the detergent is selected for cleaning, the pH value of the detergent is 6-8, and the repeated cleaning is carried out; the antibacterial preservative and the emulsifier are added into the organic solvent and mixed uniformly, the organic solvent is selected from one of methanol, ethanol or xylene, then slowly added into the chitosan aqueous solution, the chitosan aqueous solution is heated to 60-70℃ in advance before use, the ratio of antibacterial preservative, emulsifier and chitosan aqueous solution is 1:3:6, and the stirring is kept fully, centrifuged, precipitated, dried, and the antibacterial preservative microcapsule is obtained; the multi-walled carbon nanotubes and the carboxylic acid derivative are stirred by ultrasonic, the carboxylic acid derivative is selected from nano calcium carbonate, the ratio of multi-walled carbon nanotubes to carboxylic acid derivative is 1:6, filtered, dried, the antibacterial preservative microcapsule is added, stirred, the stirring time is 20-30r / min, and the multi-walled carbon nanotubes are mixed uniformly; the mixture, wood powder, binder, additive and water are added into the stirring kettle and stirred, the ratio of the mixture, wood powder, binder, additive and water is 1:1-1.5:0.05-0.2:0-1%:35-50%, and then put into the plate-shaped mold, heat solidified, the stirring parameter is 25-45r / min, the heat solidification parameter is 60-80min, the temperature is 75-80℃, and finally the product is stacked and pressed, the pressing parameter is that the pressing temperature is 120-180℃, the pressing time is 5-10min, and the pressing pressure is 1.5-2.0MPa. When the wood board is in a humid place or a relatively humid place, the surface of the multi-walled carbon nanotubes is modified into hydrophilic functional groups by hydroxyl and carboxyl, so as to form hydroxylated multi-walled carbon nanotubes and carboxylated multi-walled carbon nanotubes, so that the multi-walled carbon nanotubes obtain hydrophilicity, and thus the adsorption effect on water molecules is generated, and the microcapsule with chitosan as the shell layer melts when it meets water molecules, the antibacterial preservative in the microcapsule is released, and the wood board is affected, the wood board is uniformly mixed by wood powder and multi-walled carbon nanotubes, so that the multi-walled carbon nanotubes in the wood board are in a uniform distribution state, and the microcapsule is uniformly attached to the multi-walled carbon nanotubes, so the microcapsule is uniformly distributed in the wood board, and the multi-walled carbon nanotubes are treated by hydrophilicity, so that when the wood board is in a humid place or a relatively humid place, the water content is large, the multi-walled carbon nanotubes adsorb water molecules, the water molecules act on the microcapsule, the microcapsule is dissolved, the antibacterial preservative in the microcapsule is released to the wood board, and the wood board is affected, so as to prevent the growth of bacteria, microorganisms and other microorganisms which can erode the wood board and the corrosion of water molecules to the wood board, so as to achieve the multi-level protection of the wood board from inside to outside.

[0056] Control group (blank group)

[0057] The multi-walled carbon nanotubes are added to the oxidant solution, washed with a detergent, the pH value of which is 6-8, and the washing is repeated; the antibacterial preservative and the emulsifier are added to the organic solvent and uniformly mixed, the organic solvent being dimethylbenzene, which is then slowly added to the chitosan aqueous solution, which is heated to 60-70℃ in advance before use, the ratio of the antibacterial preservative, the emulsifier and the chitosan aqueous solution being 1:3:6, while keeping sufficient stirring, centrifugation, precipitation, drying, to obtain the antibacterial preservative microcapsule; the multi-walled carbon nanotubes and the carboxylic acid derivative are subjected to ultrasonic stirring reaction, the carboxylic acid derivative being nano calcium carbonate, the ratio of the multi-walled carbon nanotubes and the carboxylic acid derivative being 1:6, filtration, drying, addition of the antibacterial preservative microcapsule, stirring, the stirring time being 20r / min-30r / min, and uniform mixing with the multi-walled carbon nanotubes; the mixture, wood powder, binder, additive and water are added to the stirring kettle for stirring and mixing, the ratio of the mixture, wood powder, binder, additive and water being 1:1-1.5:0.05-0.2:0-1%:35-50%, and then put into a plate-shaped mold, heat solidification, the stirring parameters being 25r / min-45r / min, the heat solidification parameters being 60min-80min, the temperature being 75℃-80℃, and finally the product is stacked and pressed, the pressing parameters being a pressing temperature of 120℃-180℃, a pressing time of 5min-10min and a pressing pressure of 1.5MPa-2.0MPa.

[0058] Test results: the wood mildew-proof grade is 3, the growth of the mold is moderate, the mold grows and reproduces in a relatively large amount, and accounts for less than 70% of the total area. This method has not been subjected to hydrophilic and pressing treatment, cannot adsorb water to the inner layer to make the microcapsule work, only relies on the surface microcapsule to work, and cannot achieve a good antibacterial and preservative effect.

[0059] Comparative example one

[0060] The multi-walled carbon nanotubes are added into the oxidant solution, the ratio of the multi-walled carbon nanotubes to the oxidant solution is 1:2, and the multi-walled carbon nanotubes are added according to the predicted amount successively and are fully mixed, the oxidation reaction is carried out at a high temperature under normal pressure, the oxidation environment is between 40-80°C under normal pressure, the reaction time is 12-24h, the multi-walled carbon nanotubes are cleaned by using a detergent, the pH value of the detergent is 6-8, and the multi-walled carbon nanotubes are repeatedly cleaned; the antibacterial preservative and the emulsifier are uniformly mixed in an organic solvent, the organic solvent is dimethylbenzene, then the antibacterial preservative and the emulsifier are slowly added into a chitosan aqueous solution, the chitosan aqueous solution is heated to 60-70°C in advance before use, the ratio of the antibacterial preservative, the emulsifier and the chitosan aqueous solution is 1:3:6, and meanwhile, sufficient stirring is kept, centrifugation, precipitation and drying are carried out, and the antibacterial preservative microcapsules are obtained; the multi-walled carbon nanotubes and the carboxylic acid derivative are subjected to ultrasonic stirring reaction, the carboxylic acid derivative is nano calcium carbonate, the ratio of the multi-walled carbon nanotubes to the carboxylic acid derivative is 1:6, filtration and drying are carried out, the antibacterial preservative microcapsules are added, stirring is carried out, the stirring time is 20-30r / min, and the multi-walled carbon nanotubes are uniformly mixed; the mixture, wood powder, a binder, an additive and water are added into a stirring kettle and are stirred and mixed, the ratio of the mixture, the wood powder, the binder, the additive and the water is 1:1-1.5:0.05-0.2:0-1%:35-50%, the mixture is put into a plate-shaped mold, is heat solidified, the stirring parameter is 25-45r / min, the heat solidification parameter is 60-80min, and the temperature is 75-80°C.

[0061] Test results: wood mildew-proof grade 1: trace growth, that is, growth can be observed by naked eye observation, but the growth coverage area is less than 10% of the total area of the experimental sample; the wood is treated by hydrophilicity, so that the wood can continuously absorb water molecules, thereby continuously releasing the antibacterial preservative to protect the wood.

[0062] According to the ideal embodiments of the application, the above description can be changed and modified in various ways without deviating from the technical concept of the application. The technical scope of the application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A method for preparing a preservative and mildew resistant, weather resistant wood board, characterized by, Comprise: S1: add multi-walled carbon nanotubes to an oxidizing agent solution, and add according to the predicted amount, and mix well, and carry out oxidation reaction at normal pressure and high temperature, and clean with a detergent; S2: add an antibacterial preservative and an emulsifier to an organic solvent and mix uniformly, then slowly drop into a chitosan aqueous solution while keeping sufficient stirring, centrifuge, precipitate, and dry to obtain antibacterial preservative microcapsules; S3: use ultrasonic stirring to react the multi-walled carbon nanotubes and carboxylic acid derivatives, filter, dry, add antibacterial preservative microcapsules, stir, and mix uniformly with the multi-walled carbon nanotubes; S4: add the mixture of S3, wood powder, a binder, an additive, and water into a stirring kettle and stir mix, put into a plate-shaped mold, and heat solidify; S5: repeat the operations of S1-S4 to obtain multiple S4 products, and stack and press the S4 products.

2. The method for preparing a preservative and mildew resistant aging-resistant wood board according to claim 1, characterized in that: The oxidation environment of the oxidation reaction of S1 is 40-80°C at normal pressure, and the reaction time is 12-24h.

3. The method of claim 1, wherein the method further comprises: applying a wood preservative to the wood board; and applying a wood preservative to the wood board. The detergent in S1 is selected to clean with a detergent with a pH value of 6-8, and repeated cleaning is performed, and the oxidizing agent solution in S1 is nitric acid solution or potassium permanganate solution.

4. The method for preparing a preservative and mildew resistant and weather resistant wood board according to claim 1, characterized in that: The chitosan aqueous solution in S2 uses chitosan, a regulator, and deionized water as raw materials, uses hydrochloric acid or acetic acid as a regulator, and is stirred uniformly with a magnetic stirrer for 30-40min, thereby obtaining the chitosan aqueous solution.

5. The method of claim 1, wherein the method further comprises: applying a wood preservative to the wood board; and applying a wood preservative to the wood board. The organic solvent in S2 is selected from one of methanol, ethanol, or xylene.

6. The method of claim 1, wherein the method further comprises the step of: applying a wood preservative to the wood board. The chitosan aqueous solution in S2 is heated to 60-70°C in advance before use.

7. The method of claim 1, wherein the method further comprises: applying a wood preservative to the wood board. The carboxylic acid derivative in S3 is selected to be nano calcium carbonate, and the parameters of the stirring are all 20-30r / min.

8. The method of claim 1, wherein the method further comprises: applying a wood preservative to the wood board. The additive in S4 includes copper phthalocyanine salt, urea formaldehyde, and aluminum hydroxide.

9. The method of claim 1, wherein the method further comprises: applying a wood preservative to the wood board. The parameters of the stirring in S4 are 25-45r / min, and the parameters of the heat solidification are 60-80min at a temperature of 75-80°C.

10. The method of claim 1, wherein the method further comprises: The parameters of the pressing in S5 are a pressing temperature of 120-180°C, a pressing time of 5-10min, and a pressing pressure of 1.5-2.0MPa. ​

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