A water-based acrylic coating for protecting wooden cultural relics and a preparation method thereof

Abstract

The present invention discloses a water-based acrylic coating for protecting wooden cultural relics and a preparation method thereof. The coating comprises the following components by weight: 60-80 parts of an alcohol solvent, 20-70 parts of methyl methacrylate, 20-70 parts of butyl acrylate, 10-15 parts of hydroxyethyl methacrylate, 5-8 parts of acrylic acid, 1-5 parts of nanosheets, 1-5 parts of linolenic acid, 1-5 parts of 2-bromophenol, 3-11 parts of fluoropentyl methacrylate, 0.5-2 parts of a chain transfer agent, 0.5-2 parts of an initiator, 3-7 parts of a neutralizer, 10-24 parts of a curing agent, 0.1-0.2 parts of dibutyltin dilaurate, and 100-110 parts of water. The water-based acrylic coating for protecting wooden cultural relics and a preparation method thereof are used in the present invention. The coating has strong hydrophobicity, fast drying speed, smooth surface, good appearance quality, strong water resistance, and thus has better protection effect and longer protection time. The material can effectively repair wooden cultural relics, extend the life of the cultural relics, and better protect the appearance of the cultural relics.

Description

Technical Field

[0001] The invention relates to the technical field of wooden cultural relic protection, in particular to a water-based acrylic ester coating for wooden cultural relic protection and a preparation method thereof. Background Art

[0002] As one of the world's four ancient civilizations, my country boasts a long history of development and a far-reaching level of civilization. Throughout this long process, my country's outstanding culture has been preserved in a variety of forms. As witnesses of historical development, cultural relics possess great value. Wooden cultural relics are one of my country's many cultural heritage categories. Wood has been widely used throughout history, resulting in a rich and valuable collection of cultural relics. Effectively protecting these precious cultural relics is not only a sign of respect for history but also a commitment to the inheritance and development of Chinese civilization.

[0003] As a natural biomass material, wood has inherently poor durability and is susceptible to natural factors (physical, chemical, and biological damage such as decay fungi and insects), which can reduce its strength and even completely destroy it. Therefore, a method is urgently needed to protect wooden cultural relics. Currently, methods include physical preservation, biological control, chemical preservation, fumigation, and chemical reinforcement. Physical radiation and biological control methods can effectively kill pests inside wooden cultural relics, but they are costly and do not completely solve the problem.

[0004] Compared with the above methods, common wood coatings are simple to operate, dry quickly, and have good stability, which can compensate for surface defects of cultural relics. However, there are many problems in the application of existing wood cultural relic protective coatings, including: (1) The effective protection period is limited, at most 20 to 30 years. Yellowing, plaques, clogging of micropores and powdering caused by aging affect the wooden cultural relics themselves and subsequent protection; (2) The contradiction between the hydrophilicity and the hydrophobicity of the protective film causes a humidity gradient between the inner and outer layers of the wooden cultural relics. The dry-wet interface produces stress differences with changes in ambient temperature / humidity, causing surface peeling; (3) The compatibility of polymer materials with the wooden cultural relics themselves is poor, and it is difficult to achieve uniform surface gloss, adhesion strength, aging resistance, air permeability, and thermal expansion coefficient matching.

[0005] The main types of wood coatings in China include traditional wood coatings, water-based paints, oil-based paints, UV paints, wood wax oils, wood oils, etc. There are currently no manufacturers in China that specialize in the research and production of wood cultural relic protection coatings. Currently, the coating materials used in wooden cultural relic protection mostly come from the fields of wood coatings or architectural coatings. Although there are many types of wood coatings used at home and abroad, except for the public research on wooden cultural relic protection materials by some museums and research institutes, the rest of the research is published in cultural relic protection-related societies, and the information is not widely disseminated. In addition, many problems have not been completely solved, such as cracking, warping, falling off, insufficient hardness, etc. Therefore, it is particularly urgent and necessary to develop a wooden cultural relic protection and restoration material that is dedicated to wooden cultural relic protection and has excellent performance. Summary of the Invention

[0006] The present invention aims to provide a water-based acrylic coating for protecting wooden cultural relics and a preparation method thereof, so as to solve the problems that there is currently no coating material specifically for wooden cultural relics, the existing coatings have short protective effectiveness, poor aging resistance, easy cracking, powdering, peeling, poor hardness, and are difficult to remove when re-coating.

[0007] To achieve the above objectives, the present invention provides a water-based acrylic coating for protecting wooden cultural relics, which comprises the following components by weight: 60-80 parts of an alcohol solvent, 20-70 parts of methyl methacrylate, 20-70 parts of butyl acrylate, 10-15 parts of hydroxyethyl methacrylate, 5-8 parts of acrylic acid, 1-5 parts of nanosheets, 1-5 parts of linolenic acid, 1-5 parts of 2-borneol, 3-11 parts of fluoropentyl methacrylate, 0.5-2 parts of a chain transfer agent, 0.5-2 parts of an initiator, 3-7 parts of a neutralizer, 10-24 parts of a curing agent, 0.1-0.2 parts of dibutyltin dilaurate, and 100-110 parts of water.

[0008] Preferably, the following components are included by weight: 80 parts of alcohol solvent, 69 parts of methyl methacrylate, 23 parts of butyl acrylate, 10 parts of hydroxyethyl methacrylate, 8 parts of acrylic acid, 4 parts of nanosheets, 3 parts of linolenic acid, 4 parts of 2-borneol, 11 parts of fluoropentyl methacrylate, 1 part of chain transfer agent, 1.4 parts of initiator, 9 parts of neutralizer, 24 parts of curing agent, 0.2 parts of dibutyltin dilaurate, and 100 parts of water.

[0009] Preferably, the following components are included by weight: 70 parts of alcohol solvent, 46 parts of methyl methacrylate, 46 parts of butyl acrylate, 10 parts of hydroxyethyl methacrylate, 8 parts of acrylic acid, 4 parts of nanosheets, 3 parts of linolenic acid, 4 parts of 2-borneol, 11 parts of fluoropentyl methacrylate, 1 part of chain transfer agent, 1.4 parts of initiator, 9 parts of neutralizer, 24 parts of curing agent, 0.2 parts of dibutyltin dilaurate, and 100 parts of water.

[0010] Preferably, the following components are included by weight: 60 parts of alcohol solvent, 23 parts of methyl methacrylate, 69 parts of butyl acrylate, 10 parts of hydroxyethyl methacrylate, 8 parts of acrylic acid, 4 parts of nanosheets, 3 parts of linolenic acid, 4 parts of 2-borneol, 11 parts of fluoropentyl methacrylate, 1 part of chain transfer agent, 1.4 parts of initiator, 9 parts of neutralizer, 24 parts of curing agent, 0.2 parts of dibutyltin dilaurate, and 100 parts of water.

[0011] Preferably, the alcohol solvent is one or more of methanol, ethanol, n-propanol, and isopropanol.

[0012] Preferably, the initiator is one or more of hydrogen peroxide, ammonium persulfate, azobisisobutyronitrile, and benzophenone.

[0013] Preferably, the nanosheets are perovskite nanosheets.

[0014] Preferably, the neutralizing agent is one or more of triethylamine, dimethylethanolamine, diethylethanolamine, and 2-amino-2-methylpropanol.

[0015] Preferably, the curing agent is hexamethylene diisocyanate, and the chain transfer agent is dodecyl mercaptan.

[0016] The present invention provides a method for preparing a water-based acrylic coating for protecting wooden cultural relics, comprising the following steps:

[0017] Step 1: Add isopropyl alcohol solution to a three-necked flask equipped with a stirring device, a thermometer, a reflux condenser, and a dropping device, stir and heat to 80-90°C in a water bath, and keep the temperature in a constant temperature water bath for 20 minutes;

[0018] Step 2: After the constant temperature water bath, the mixture obtained by mixing the above monomers and initiators is added dropwise within 3-4 hours, and then kept warm for 2 hours. During the insulation process, nitrogen is filled for protection to obtain an acrylic resin prepolymer;

[0019] Step 3: When the temperature in the three-necked flask drops to 55°C, add an appropriate amount of amine neutralizer and stir thoroughly for 20 minutes. Then add an appropriate amount of deionized water and stir at high speed for 20 minutes to obtain a water-based acrylic resin. Add a curing agent and an organic tin catalyst to cure into a film.

[0020] Therefore, the present invention adopts the above-mentioned water-based acrylic coating for protecting wooden cultural relics and its preparation method, which has the following beneficial effects:

[0021] (1) The present invention uses acrylic acid ester monomers as raw materials, disperses the monomers in water through mechanical stirring to form an emulsion, and polymerizes the monomers using an aqueous initiator. The emulsion has excellent mechanical properties, is biodegradable, and is environmentally friendly.

[0022] (2) The coating prepared by the method provided by the present invention undergoes a cross-linking reaction of the reactive groups of several components during its film formation process, so that the coating has a network structure, and thus has good solvent resistance and chemical resistance, and the film has high hardness.

[0023] (3) The coating prepared by the method provided by the present invention is a highly light-transmitting material. When applied to wood, the light transmittance can reach over 90%. The surface is smooth and flat, and does not affect the appearance of the protected wooden cultural relics. It is suitable for the protection of a variety of wooden cultural relics.

[0024] (4) The water resistance of the coating prepared by the method provided by the present invention is greatly extended, thereby increasing the protection time of a single coating. In addition, the coating raw materials provided by the present invention are widely available, inexpensive, simple to prepare, and do not require high temperature and high pressure, which can greatly reduce the protection cost of wooden cultural relics.

[0025] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a graph showing the particle size test results of a water-based acrylic resin according to an embodiment of the present invention, a water-based acrylic ester coating for protecting wooden cultural relics and a preparation method thereof. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0028] Unless otherwise defined, technical or scientific terms used in the present invention shall have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs.

[0029] The invention provides a water-based acrylic ester coating for protecting wooden cultural relics. The coating comprises the following components by weight: 60-80 parts of an alcohol solvent, 20-70 parts of methyl methacrylate, 20-70 parts of butyl acrylate, 10-15 parts of hydroxyethyl methacrylate, 5-8 parts of acrylic acid, 1-5 parts of nanosheets, 1-5 parts of linolenic acid, 1-5 parts of 2-borneol, 3-11 parts of fluoropentyl methacrylate, 0.5-2 parts of a chain transfer agent, 0.5-2 parts of an initiator, 3-7 parts of a neutralizer, 10-24 parts of a curing agent, 0.1-0.2 parts of dibutyltin dilaurate, and 100-110 parts of water.

[0030] The preparation method comprises the following steps:

[0031] Step 1: Add isopropyl alcohol solution to a three-necked flask equipped with a stirring device, a thermometer, a reflux condenser, and a dropping device, stir and heat to 80-90°C in a water bath, and then keep the temperature in a constant temperature water bath for 20 minutes;

[0032] Step 2: After the constant temperature water bath, the mixture obtained by mixing the above monomers and initiators is added dropwise within 3-4 hours, and then kept warm for 2 hours. During the insulation process, nitrogen is filled for protection to obtain an acrylic resin prepolymer;

[0033] Step 3: When the temperature in the three-necked flask drops to 55°C, add an appropriate amount of amine neutralizer and stir thoroughly for 20 minutes. Then add an appropriate amount of deionized water and stir at high speed for 20 minutes to obtain a water-based acrylic resin. Add a curing agent and an organic tin catalyst to cure into a film.

[0034] Example 1

[0035] In a three-necked flask equipped with a stirring device, thermometer, reflux condenser, and dropping device, add isopropyl alcohol solvent, stir in a water bath, heat to 85°C, and keep warm for 20 minutes. After constant temperature water bath, add 23g methyl methacrylate, 23g butyl acrylate, 5g hydroxyethyl methacrylate, 4g acrylic acid, 2g nanosheets, 1.5g linolenic acid, 2g 2-borneol, 5.5g fluoropentyl methacrylate, 0.5g dodecanethiol, 0.7g azobisisobutyronitrile, 0.1ml dibutyltin dilaurate, and 100 parts of water.

[0036] The mixture of the above monomers and initiator is added dropwise within 3-4 hours, then kept warm for 2 hours under N2 protection to obtain an acrylic resin prepolymer, cooled to 55°C, 4.5g of triethylamine neutralizer is added, and the mixture is fully stirred for 20 minutes. Then, an appropriate amount of deionized water is added and stirred at high speed for 20 minutes to obtain a water-based acrylic resin. 12g of hexamethylene diisocyanate and 0.1ml of dibutyltin dilaurate are added, and the coating solution is then applied to the surface of the wood material and evaporated at room temperature for 36 hours to obtain a water-based acrylic coating.

[0037] Example 2

[0038] In a three-necked flask equipped with a stirring device, thermometer, reflux condenser, and dropping device, add isopropyl alcohol solvent, stir in a water bath and heat to 85°C, and keep warm for 20 minutes. After a constant temperature water bath, add 34.5g of methyl methacrylate, 11.5g of butyl acrylate, 5g of hydroxyethyl methacrylate, 4g of acrylic acid, 2g of nanosheets, 1.5g of linolenic acid, 2g of 2-borneol, 5.5g of fluoropentyl methacrylate, 0.5g of dodecanethiol, 0.7g of azobisisobutyronitrile, 0.1ml of dibutyltin dilaurate, and 100 parts of water.

[0039] The mixture of the above monomers and initiator is added dropwise within 3-4 hours, then kept warm for 2 hours under N2 protection to obtain an acrylic resin prepolymer, cooled to 55°C, 4.5g of triethylamine neutralizer is added, and the mixture is fully stirred for 20 minutes. Then, an appropriate amount of deionized water is added and stirred at high speed for 20 minutes to obtain a water-based acrylic resin. 12g of hexamethylene diisocyanate and 0.1ml of dibutyltin dilaurate are added, and the coating solution is then applied to the surface of the wood material and evaporated at room temperature for 36 hours to obtain a water-based acrylic coating.

[0040] Example 3

[0041] In a three-necked flask equipped with a stirring device, thermometer, reflux condenser, and dropping device, add isopropyl alcohol solvent, stir in a water bath, heat to 85°C, and keep warm for 20 minutes. After constant temperature water bath, add 23g methyl methacrylate, 23g butyl acrylate, 5g hydroxyethyl methacrylate, 4g acrylic acid, 2g nanosheets, 1.5g linolenic acid, 2g 2-borneol, 5.5g fluoropentyl methacrylate, 0.5g dodecanethiol, 0.7g azobisisobutyronitrile, 0.1ml dibutyltin dilaurate, and 100 parts of water.

[0042] The mixture of the above monomers and initiator is added dropwise within 3-4 hours, then kept warm for 2 hours under N2 protection to obtain an acrylic resin prepolymer, cooled to 55°C, 4.5g of triethylamine neutralizer is added, and the mixture is fully stirred for 20 minutes. Then, an appropriate amount of deionized water is added and stirred at high speed for 20 minutes to obtain a water-based acrylic resin. 12g of hexamethylene diisocyanate and 0.1ml of dibutyltin dilaurate are added, and the coating solution is then applied to the surface of the wood material and evaporated at room temperature for 36 hours to obtain a water-based acrylic coating.

[0043] Example 4

[0044] In a three-necked flask equipped with a stirring device, thermometer, reflux condenser, and dropping device, add isopropyl alcohol solvent, stir in a water bath and heat to 85°C, and keep warm for 20 minutes. After constant temperature water bath, add 15.4g methyl methacrylate, 30.6g butyl acrylate, 5g hydroxyethyl methacrylate, 4g acrylic acid, 2g nanosheets, 1.5g linolenic acid, 2g 2-borneol, 5.5g fluoropentyl methacrylate, 0.5g dodecanethiol, 0.7g azobisisobutyronitrile, 0.1ml dibutyltin dilaurate, and 100 parts of water.

[0045] The mixture of the above monomers and initiator is added dropwise within 3-4 hours, then kept warm for 2 hours under N2 protection to obtain an acrylic resin prepolymer, cooled to 55°C, 4.5g of triethylamine neutralizer is added, and the mixture is fully stirred for 20 minutes. Then, an appropriate amount of deionized water is added and stirred at high speed for 20 minutes to obtain a water-based acrylic resin. 12g of hexamethylene diisocyanate and 0.1ml of dibutyltin dilaurate are added, and the coating solution is then applied to the surface of the wood material and evaporated at room temperature for 36 hours to obtain a water-based acrylic coating.

[0046] Example 5

[0047] In a three-necked flask equipped with a stirring device, thermometer, reflux condenser, and dropping device, add isopropyl alcohol solvent, stir in a water bath and heat to 85°C, and keep warm for 20 minutes. After constant temperature water bath, add 11.5g methyl methacrylate, 34.5g butyl acrylate, 5g hydroxyethyl methacrylate, 4g acrylic acid, 2g nanosheets, 1.5g linolenic acid, 2g 2-borneol, 5.5g fluoropentyl methacrylate, 0.5g dodecanethiol, 0.7g azobisisobutyronitrile, 0.1ml dibutyltin dilaurate, and 100 parts of water.

[0048] The mixture of the above monomers and initiator is added dropwise within 3-4 hours, then kept warm for 2 hours under N2 protection to obtain an acrylic resin prepolymer, cooled to 55°C, 4.5g of triethylamine neutralizer is added, and the mixture is fully stirred for 20 minutes. Then, an appropriate amount of deionized water is added and stirred at high speed for 20 minutes to obtain a water-based acrylic resin. 12g of hexamethylene diisocyanate and 0.1ml of dibutyltin dilaurate are added, and the coating solution is then applied to the surface of the wood material and evaporated at room temperature for 36 hours to obtain a water-based acrylic coating.

[0049] Effect verification

[0050] During the coating process, material viscosity is a crucial factor. High viscosity impairs fluidity, preventing sufficient leveling during the coating process, and creating surface defects such as bumps and lumps. Conversely, low viscosity can lead to noticeable flow and film formation. Only when the material viscosity is appropriate can the final coating result meet practical requirements. The paint film should be uniform, delicate, glossy, smooth, and free of flow marks. Therefore, material viscosity is a key factor influencing spraying results.

[0051] B-72 is a widely used acrylic ester material for cultural relic preservation. It's a surface sealing material from the Paraloid series, model B-72. Paraloid B-72, a general-purpose thermoplastic synthetic resin produced by Rohm and Haas, a subsidiary of Dow Chemical, is a copolymer of 70% ethyl methacrylate and 30% methyl acrylate (PEMA / PMA). B-72 has been used in the restoration field for 50 years and is highly effective at penetrating and reinforcing untreated damaged areas of cultural relics, as well as sealing and protecting them. It's also widely used in cultural relic restoration, making significant contributions to the preservation and restoration of works of art. Therefore, to better illustrate the advancement of the present invention's technical solution over the prior art, B-72 is used as a comparative example.

[0052] Comparative Example 1

[0053] In the same way, B-72, a coating commonly used in cultural relic protection today, was also coated on a 5cm*10cm pine wood block as comparative example 1.

[0054] The experiment was conducted using the following method:

[0055] The adhesion performance test uses the common cross-cut test, which is determined according to the national standard "GB / T9286-2021". Grade 0 is the best, followed by grade 1, and grade 5 is the worst; the transmittance is measured using a spectrophotometer with a wavelength of 550nm. The instrument automatically calculates the transmittance; a contact angle tester is used to analyze the contact angle between the liquid and the coating film using optical imaging methods, thereby characterizing the wetting affinity and repellency properties between the two phases; a nanoparticle size and Zeta potential analyzer is used to measure the particle size distribution and stability of the resin; the sample is cut into 2cm*2cm squares and immersed in water for 40 hours, and the water absorption rate is calculated based on the mass change of the sample before and after soaking in water; the test results are shown in Table 1.

[0056] Table 1 Performance test results

[0057]

[0058]

[0059] The embodiment of the present invention prepares a coating with high adhesion, high transmittance, high hardness and high water contact angle. Figure 1 It can be seen that as the MMA:BA ratio decreases, the resin particle size continues to decrease. Except for MMA:BA=3:1, the average particle sizes of the other resins are all below 80 nanometers, and the minimum average particle size reaches about 20 nanometers. It can be seen that the resin has excellent stability.

[0060] Therefore, the present invention adopts the above-mentioned water-based acrylic coating for protecting wooden cultural relics and its preparation method, which has high light transmittance, fast drying speed, smooth surface, good appearance quality, strong water resistance, and thus has better protection effect and longer protection time. The raw materials for preparing the coating are low in price, the preparation is simple, and no high temperature and high pressure are required, which can greatly reduce the protection cost of wooden cultural relics; it also has good re-dissolution ability, and can achieve reversibility of materials and processes during the cultural relic restoration process, and can more easily replace other cultural relic protection materials.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solutions of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A water-based acrylic coating for protecting wooden cultural relics, characterized by: The invention comprises the following components by weight: 60-80 parts of alcohol solvent, 20-70 parts of methyl methacrylate, 20-70 parts of butyl acrylate, 10-15 parts of hydroxyethyl methacrylate, 5-8 parts of acrylic acid, 1-5 parts of nanosheets, 1-5 parts of linolenic acid, 1-5 parts of 2-borneol, 3-11 parts of fluoropentyl methacrylate, 0.5-2 parts of chain transfer agent, 0.5-2 parts of initiator, 3-7 parts of neutralizer, 10-24 parts of curing agent, 0.1-0.2 parts of dibutyltin dilaurate, and 100-110 parts of water. The preparation method of the above-mentioned water-based acrylic coating for protecting wooden cultural relics comprises the following steps: Step 1: Add isopropyl alcohol solution to a three-necked flask equipped with a stirring device, a thermometer, a reflux condenser, and a dropping device, stir and heat to 80-90°C in a water bath, and keep the temperature in a constant temperature water bath for 20 minutes; Step 2: After the constant temperature water bath, the mixture obtained by mixing the above monomers and initiators is added dropwise within 3-4 hours, and then kept warm for 2 hours. During the insulation process, nitrogen is filled for protection to obtain an acrylic resin prepolymer; Step 3: When the temperature in the three-necked flask drops to 55°C, add an appropriate amount of amine neutralizer and stir thoroughly for 20 minutes. Then add an appropriate amount of deionized water and stir at high speed for 20 minutes to obtain a water-based acrylic resin. Add a curing agent and an organic tin catalyst to cure into a film.

2. The water-based acrylic coating for protecting wooden cultural relics according to claim 1, characterized in that: The invention comprises the following components by weight: 80 parts of alcohol solvent, 69 parts of methyl methacrylate, 23 parts of butyl acrylate, 10 parts of hydroxyethyl methacrylate, 8 parts of acrylic acid, 4 parts of nanosheets, 3 parts of linolenic acid, 4 parts of 2-borneol, 11 parts of fluoropentyl methacrylate, 1 part of chain transfer agent, 1.4 parts of initiator, 9 parts of neutralizer, 24 parts of curing agent, 0.2 parts of dibutyltin dilaurate and 100 parts of water.

3. The water-based acrylic coating for protecting wooden cultural relics according to claim 1, characterized in that: The invention comprises the following components by weight: 70 parts of alcohol solvent, 46 parts of methyl methacrylate, 46 parts of butyl acrylate, 10 parts of hydroxyethyl methacrylate, 8 parts of acrylic acid, 4 parts of nanosheets, 3 parts of linolenic acid, 4 parts of 2-borneol, 11 parts of fluoropentyl methacrylate, 1 part of chain transfer agent, 1.4 parts of initiator, 9 parts of neutralizer, 24 parts of curing agent, 0.2 parts of dibutyltin dilaurate and 100 parts of water.

4. The water-based acrylic coating for protecting wooden cultural relics according to claim 1, characterized in that: The invention comprises the following components by weight: 60 parts of alcohol solvent, 23 parts of methyl methacrylate, 69 parts of butyl acrylate, 10 parts of hydroxyethyl methacrylate, 8 parts of acrylic acid, 4 parts of nanosheets, 3 parts of linolenic acid, 4 parts of 2-borneol, 11 parts of fluoropentyl methacrylate, 1 part of chain transfer agent, 1.4 parts of initiator, 9 parts of neutralizer, 24 parts of curing agent, 0.2 parts of dibutyltin dilaurate and 100 parts of water.

5. The water-based acrylic coating for protecting wooden cultural relics according to claim 1, characterized in that: The alcohol solvent is one or more of methanol, ethanol, n-propanol and isopropanol.

6. The water-based acrylic coating for protecting wooden cultural relics according to claim 1, characterized in that: The initiator is one or more of hydrogen peroxide, ammonium persulfate, azobisisobutyronitrile, and benzophenone.

7. The water-based acrylic coating for protecting wooden cultural relics according to claim 1, characterized in that: The nanosheets are perovskite nanosheets.

8. The water-based acrylic coating for protecting wooden cultural relics according to claim 1, characterized in that: The neutralizing agent is one or more of triethylamine, dimethylethanolamine, diethylethanolamine, and 2-nitro-2-methylpropanol.

9. The water-based acrylic coating for protecting wooden cultural relics according to claim 1, characterized in that: The curing agent is hexamethylene diisocyanate, and the chain transfer agent is dodecyl mercaptan.

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