High-hardness wear-resistant paint wiping method for mahogany furniture based on nano modified raw lacquer and enzyme catalytic oxidation

Abstract

The invention relates to the technical field of furniture surface treatment, in particular to a mahogany furniture high-hardness wear-resistant paint wiping method based on nano-modified raw lacquer and enzyme catalytic oxidation, which comprises the following steps: S1, blank treatment; s2, ground color treatment; s3, wiping paint for the first time; s4, carrying out enzyme catalytic oxidation; s5, circularly wiping paint and polishing; and S6, fine polishing. According to the high-hardness wear-resistant redwood furniture paint wiping method based on the nano-modified raw lacquer and the enzyme catalytic oxidation, by introducing a bio-enzyme catalytic oxidation technology, the drying period of more than 24 hours for each time of paint wiping in a traditional process is shortened to be within 6 hours, and by combining circulating optimization of nano-paint wiping, enzyme catalysis and fine grinding, the paint wiping efficiency is greatly improved; the production cycle of the whole process is greatly shortened from 30-40 days to 10-15 days, and the efficiency is improved by about 66%. The breakthrough solves the industrial pain points of long period and low productivity in redwood furniture production, the occupied cost and time cost of a production site are remarkably reduced, and technical support is provided for large-scale production.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of furniture surface treatment, in particular, to a high-hardness and wear-resistant wiping paint method for rosewood furniture based on nano-modified raw lacquer and enzyme catalytic oxidation. BACKGROUND

[0002] As a carrier of traditional craftsmanship and cultural heritage, the surface finishing process of rosewood furniture directly affects the texture, durability and cultural value of the furniture. Among them, the wiping paint (wiping lacquer) process using natural raw lacquer (also known as lacquer) as raw material, because it can highlight the natural texture of rosewood and form a jade-like texture, has become a classic treatment method for high-end rosewood furniture.

[0003] However, the traditional rosewood furniture wiping paint process has many technical limitations in practical application: Long process cycle: The traditional process needs to go through multiple wiping, polishing and shading cycles. The shading of each layer of paint needs to be carried out under specific temperature and humidity (usually temperature 25-30℃, humidity 75-85%), and the drying time of each layer is as long as 24 hours or more. The whole process usually takes 30-40 days or even longer, which seriously restricts the production efficiency.

[0004] Insufficient paint film performance: Although the natural raw lacquer film has good adhesion and decoration, its hardness (usually pencil hardness is only about 2H) and wear resistance are still inferior to modern chemical coatings. Long-term use can cause scratches and wear, affecting the appearance and service life of the furniture.

[0005] Strong environmental dependence: The drying of raw lacquer relies on the oxidation polymerization reaction of laccase, and the requirements for temperature and humidity are strict. Fluctuations in temperature and humidity can cause uneven drying of the paint film, resulting in defects such as wrinkles and bubbles, increasing the difficulty of quality control in production.

[0006] Limited functionality and decoration: The traditional process mainly relies on the color and luster of wood and a small amount of mineral pigments for color adjustment, with limited color richness. At the same time, the paint film has insufficient density, and its water resistance and weather resistance are generally poor, making it difficult to meet the demand for multifunctionality of modern furniture. SUMMARY

[0007] The present application aims to provide a high-hardness and wear-resistant wiping paint method for rosewood furniture based on nano-modified raw lacquer and enzyme catalytic oxidation, to solve the problem of the traditional process needing multiple wiping, polishing and shading cycles, each layer of paint needing to be shaded under specific temperature and humidity (usually temperature 25-30℃, humidity 75-85%), and the drying time of each layer being as long as 24 hours or more, the whole process usually taking 30-40 days or even longer, which seriously restricts the production efficiency.

[0008] To achieve the above object, the application provides a redwood furniture high-hardness wear-resistant paint method based on nano-modified raw lacquer and enzyme catalytic oxidation, which comprises the following steps: S1, blank processing: finely polishing the white blank redwood furniture to be smooth and flat; S2, base color processing: using water-based plant dyes to show the wood grain, and then shading; S3, first paint: using traditional raw lacquer to uniformly paint the first layer to seal the bottom surface, and then putting the redwood furniture into a shading room, and shading for 6-8 hours under the conditions of a temperature of 25-30 DEG C and a humidity of 75-85%; S4, enzyme catalytic oxidation: using a superfine atomizing spray gun to uniformly spray a biological enzyme catalytic drying agent on the paint film surface which is not completely dry, and then continuing to put it into the above-mentioned shading room, so that the enzyme accelerates the polymerization of paint phenol, and the drying time in this stage is 2-4 hours; the biological enzyme catalytic drying agent is an enzyme solution prepared by dissolving paint enzyme in a buffer solution with a pH value of 4.5-6.0; S5, circulating paint and polishing: using nano-composite raw lacquer to paint the second time, immediately repeating the enzyme catalytic oxidation process of step S4, and after the surface is dry, using superfine sandpaper with a mesh size of more than 2000 to slightly and finely polish to remove particulate matter, and repeating the above-mentioned circulation of “painting nano lacquer→ enzyme catalysis→ fine polishing” 4-6 times, and the interval time of each paint is shortened to within 6 hours; S6, fine polishing: after all the coating is completed, naturally stabilizing for 7-10 days, and finally manually polishing with natural beeswax to obtain a mirror effect.

[0009] This setting combines nano-modified raw lacquer and enzyme catalytic oxidation technology through the process of “blank processing→ base color processing→ first paint→ enzyme catalytic oxidation→ circulating paint and polishing→ fine polishing”. The first paint uses traditional raw lacquer to seal the bottom surface, and the subsequent circulation adopts nano-composite raw lacquer, and cooperates with biological enzyme to accelerate the polymerization of paint phenol, so as to shorten the drying time, and form a high-quality paint film through multiple circulation and fine polishing.

[0010] As a preferred scheme of the application, the preparation of the biological enzyme catalytic drying agent in step S4 comprises the following steps: S41, enzyme activity determination: adopting spectrophotometry, using ABTS as a substrate, adding 0.5mM ABTS solution and a proper amount of appropriately diluted enzyme solution in 1mL pH3.0, 0.1M citric acid-sodium phosphate buffer solution, and using an ultraviolet spectrophotometer to monitor the change of absorbance at 420nm under the condition of constant temperature of 30 DEG C, so as to determine the enzyme activity of the paint enzyme crude enzyme solution; S42, buffer solution preparation: using 0.1M citric acid-sodium phosphate buffer system, accurately weigh the amount of citric acid and sodium phosphate dibasic, dissolve with ultrapure water, adjust the pH value to 5.2±0.1; S43, working solution dilution and preparation: according to the enzyme activity of the crude enzyme solution measured in step S1, accurately dilute the working solution of laccase under the low temperature operation table of 4-10℃ using the buffer prepared in step S2, and adjust the enzyme activity of the working solution of laccase to the range of 300U / mL±50U / mL; S44, stabilization treatment: add 5% anhydrous glycerol and 0.01% potassium sorbate to the prepared working solution; S45, storage and use: the prepared biological drying agent working solution is divided into brown light-proof reagent bottles and stored in a refrigerator at 4℃±1℃ in the dark, and is balanced at room temperature for at least 30 minutes before use, and an air pressure spray gun is used to ensure uniform spraying and no liquid droplet residue.

[0011] This setting clearly specifies the preparation steps of the biological enzyme catalytic drying agent, determines the enzyme activity by spectrophotometry, prepares a buffer solution with a specific pH, dilutes the laccase to an optimal concentration, adds stabilizers and specifies the storage and use conditions to ensure stable enzyme activity and efficient catalysis of the oxidation polymerization of raw lacquer.

[0012] As a preferred scheme of the present application, in step S5, the nano-composite raw lacquer is prepared by taking the filtered raw lacquer as a base material, adding 5%-15% nano-aluminum oxide powder and 2%-5% nano-silica sol based on the weight of the raw lacquer, and uniformly dispersing them by a high-speed dispersion machine.

[0013] This setting uses filtered raw lacquer as a base material, adds 5%-15% nano-aluminum oxide (to enhance hardness) and 2%-5% nano-silica sol (to improve compactness and adhesion), and uniformly disperses them by a high-speed dispersion machine to form a composite structure with "rigid skeleton + compact filling".

[0014] As a preferred scheme of the present application, in step S2, the conditions for shade drying are temperature 25-30℃ and humidity 75-85%.

[0015] This setting controls the shade drying conditions after base color treatment to be temperature 25-30℃ and humidity 75-85%, which meets the curing needs of water-based plant dyes and provides a stable base for subsequent raw lacquer coating.

[0016] As a preferred scheme of the present application, the effective use period of the biological drying agent working solution in step S5 is within 7 days after preparation, and the enzyme activity needs to be re-measured before use.

[0017] This setting limits the shelf life of the biological drying agent working solution to 7 days, and the enzyme activity must be retested before use, because laccase activity decreases over time, and exceeding the expiration date or insufficient enzyme activity will affect the catalytic effect.

[0018] As a preferred embodiment of the present invention, the nano-alumina in step S5 is α-phase alumina.

[0019] This design uses α-phase alumina as a nano-additive, which has extremely high hardness (Mohs hardness 9) and chemical stability, and can improve the mechanical properties of the coating film compared to other phases.

[0020] As a preferred embodiment of the present invention, it also includes a device for applying high-hardness, wear-resistant lacquer to mahogany furniture, comprising a blank polishing unit, a base color treatment unit, a lacquer application unit, an enzyme-catalyzed oxidation unit, a circulation treatment unit, and a fine polishing unit.

[0021] This setup breaks down the painting process into six units: raw material grinding, base color treatment, painting, enzyme-catalyzed oxidation, recycling, and fine polishing. Each unit has a clear division of labor, forming an assembly line-style operation system.

[0022] As a preferred embodiment of the present invention, the blank polishing unit adopts a polishing machine, which is used to finely polish the blank mahogany furniture until it is smooth and flat. The base color treatment unit includes a dye container for holding water-based plant dye and a rubbing brush. The rubbing brush is used to apply water-based plant dye to the mahogany furniture after it has been treated by the blank polishing unit. The base color treatment unit also includes a first shade drying rack for drying the rubbed mahogany furniture in the shade. The lacquer wiping unit includes a first lacquer container and a first lacquer wiping brush. The first lacquer container is used to hold traditional raw lacquer, and the first lacquer wiping brush is used to apply the traditional raw lacquer to the mahogany furniture that has been treated by the base color treatment unit for the first time. The enzyme-catalyzed oxidation unit includes a bio-enzyme catalytic drying agent storage component, an ultra-fine atomizing spray gun, and a second drying rack. The bio-enzyme catalytic drying agent storage component is used to store the bio-enzyme catalytic drying agent. The ultra-fine atomizing spray gun is connected to the bio-enzyme catalytic drying agent storage component and is used to evenly spray the bio-enzyme catalytic drying agent onto the surface of the paint film that is not completely dry. The second drying rack is used to provide an environment of 25-30℃ and 75-85% humidity for the mahogany furniture after spraying the bio-enzyme catalytic drying agent to accelerate the polymerization of urushiol. The recycling unit includes a second paint container, a second paint brush, a sander, and a control component. The second paint container is used to hold nano-composite raw paint, the second paint brush is used to apply the nano-composite raw paint, and the sander is ultra-fine sandpaper with a grit of 2000 or higher, used to perform slight fine sanding on the paint film after it has dried. The control component uses a single-chip microcomputer processor to control the "applying nano-paint → enzyme catalysis → fine sanding" process to cycle 4-6 times. The second paint container in the recycling unit is also connected to a high-speed disperser, which is used to fully homogenize and disperse the nano-composite raw paint material in the second paint container to form nano-composite raw paint. The fine polishing unit includes a beeswax container and a polishing machine. The beeswax container is used to hold natural beeswax, and the polishing machine is used to apply natural beeswax to the mahogany furniture that has been processed by the recycling unit and then manually polish it to achieve a mirror finish.

[0023] This setting defines in detail the core components of each unit (such as the grinding machine used in the billet grinding unit, the ultrafine atomizing spray gun used in the enzyme catalysis unit, etc.), clarifies the function of the components (such as controlling the components to cycle 4-6 times), and ensures that each step is executed accurately.

[0024] As a preferred embodiment of the present invention, the bio-enzyme catalytic drying agent storage component includes a brown light-proof reagent bottle and a refrigerator. The brown light-proof reagent bottle is used to dispense the bio-enzyme catalytic drying agent working solution, and the refrigerator is used to store the brown light-proof reagent bottle at 4℃±1℃ in the dark.

[0025] This setup uses a brown, light-proof reagent bottle (UV-protected) and a 4℃±1℃ refrigerator (low-temperature storage) to delay laccase protein denaturation and maintain enzyme activity.

[0026] As a preferred embodiment of the present invention, both the first and second shade drying racks include a temperature and humidity control module, which is used to control the temperature of the shade drying environment at 25-30℃ and the humidity at 75-85%.

[0027] The first and second shade drying racks are equipped with temperature and humidity control modules to precisely maintain a temperature of 25-30℃ and a humidity of 75-85%, which is suitable for the biochemical requirements of lacquer oxidation polymerization and water-based dye curing.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This high-hardness, wear-resistant lacquer application method for mahogany furniture, based on nano-modified raw lacquer and enzyme-catalyzed oxidation, shortens the drying cycle of each coat of lacquer from over 24 hours in traditional processes to less than 6 hours by introducing bio-enzyme catalytic oxidation technology. Combined with the optimized cycle of "applying nano-lacquer → enzyme catalysis → fine polishing," the entire production cycle is significantly reduced from 30-40 days to 10-15 days, improving efficiency by approximately 66%. This breakthrough solves the industry pain points of "long cycle and low capacity" in mahogany furniture production, significantly reducing production site and time costs, and providing technical support for large-scale production. 2. In this method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation, the synergistic effect of nano-alumina (α-Al2O3) and nano-silica (SiO2) increases the pencil hardness of the lacquer film from 2H in traditional processes to 4H, and reduces the weight loss (rotating rubber wheel test) from 45mg to 18mg, resulting in a 150% improvement in wear resistance. This "rigid skeleton + dense filling" structural design gives the lacquer film scratch resistance close to that of ceramics, enabling it to withstand friction and impacts during daily use for a long time. The dense structure and chemical inert barrier formed by nanomaterials upgrade the boiling water resistance of the paint film from "slight whitening, which can be recovered" in the traditional process to "no obvious change"; the adhesion level is improved from "excellent" to "best", effectively preventing the paint film from cracking and peeling, and significantly extending the service life of mahogany furniture. 3. This method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation uses natural raw lacquer as the base material throughout the process, combined with a bio-enzyme catalytic drying agent (laccase) and water-based plant dyes. This avoids the risks of toxic volatile emissions and lacquer film discoloration associated with chemical drying agents (such as cobalt-manganese compounds). The finished furniture has no irritating odor, meeting the stringent environmental and health requirements of modern home furnishings, while retaining the skin-friendly properties of natural raw lacquer, achieving a perfect fusion of traditional craftsmanship and green concepts. 4. In this method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation, the microscopic filling effect of nanomaterials eliminates internal pores in the lacquer film. Combined with fine sanding using ultra-fine sandpaper (2000 grit or higher) and polishing with natural beeswax, the gloss of the lacquer film is increased from 85 GU to 95 GU, creating a unique "porcelain-like" or "jade-like" mirror effect. Simultaneously, the flexible use of water-based plant dyes breaks through the color limitations of traditional processes, highlighting the natural wood grain's layering while allowing for rich tonal expressions according to design needs, satisfying modern aesthetics' dual pursuit of "texture and individuality." 5. In this method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation, the enzyme-catalyzed reaction has a higher tolerance for temperature and humidity fluctuations. Combined with the shortened drying time, this reduces the risk of lacquer film defects caused by weather changes in traditional processes. Even when the temperature and humidity in the shaded room fluctuate by ±5%, uniform drying of the lacquer film can still be guaranteed, significantly simplifying quality control in the production process and improving process stability. Attached Figure Description

[0029] Fig. 1 This is a schematic diagram of the overall structure of the present invention; Fig. 2 This is a schematic diagram of the background color processing unit in this invention; Fig. 3 This is a schematic diagram of the paint wiping unit in this invention; Fig. 4 This is a schematic diagram of the enzyme catalytic oxidation unit in this invention; Fig. 5 This is a schematic diagram of the loop processing unit in this invention; Fig. 6 This is a schematic diagram of the fine polishing unit in this invention; The meanings of the labels in the diagram are as follows: 1. Raw material polishing unit; 2. Base color treatment unit; 21. Dye container; 22. Color wiping brush; 23. First shade drying rack; 3. Paint wiping unit; 31. First paint container; 32. First paint wiping brush; 4. Enzyme catalytic oxidation unit; 41. Bio-enzyme catalytic drying agent storage component; 411. Brown light-proof reagent bottle; 412. Refrigerator; 42. Ultra-fine atomizing spray gun; 43. Second shade drying rack; 5. Circulation processing unit; 51. Second paint container; 52. Second paint wiping brush; 53. Polishing machine; 54. Control component; 55. High-speed disperser; 6. Fine polishing unit; 61. Beeswax container; 62. Polishing machine. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This invention provides a method for producing a high-hardness, wear-resistant coating for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation, such as... Figs. 1-3 As shown, it includes the following steps: S1. Raw material processing: Finely sand the unfinished rosewood furniture until it is smooth and flat; S2. Base color treatment: Use water-based plant dyes to rub the wood grain to reveal it, and then let it air dry. S3. First coat of lacquer: Apply the first layer of traditional raw lacquer evenly to seal the bottom surface. Then place the mahogany furniture in a shade room and let it air dry for 6-8 hours at a temperature of 25-30℃ and a humidity of 75-85%. S4. Enzyme-catalyzed oxidation: Using an ultra-fine atomizing spray gun, the bio-enzyme catalytic drying agent is evenly sprayed onto the surface of the not-completely-dried paint film, and then placed back into the above-mentioned shade chamber to accelerate the polymerization of urushiol. The drying time for this stage is 2-4 hours. The bio-enzyme catalytic drying agent is an enzyme solution prepared by dissolving laccase in a buffer solution with a pH value of 4.5-6.0. S5. Cyclic wiping and sanding: Apply nano-composite raw lacquer for the second wiping, and immediately repeat the enzyme-catalyzed oxidation process of step S4. After the surface is dry, use ultra-fine sandpaper of 2000 grit or higher to lightly and finely sand to remove particles. Repeat the above cycle of "wiping nano-lacquer → enzyme catalysis → fine sanding" 4-6 times, and shorten the interval between each wiping to within 6 hours. S6. Fine polishing: After all coatings are applied, allow 7-10 days for natural stabilization, and finally hand polish with natural beeswax to achieve a mirror finish.

[0032] The process combines nano-modified raw lacquer with enzyme-catalyzed oxidation technology through the following steps: "Raw material processing (raw material sanding unit 1) → Base color processing (base color processing unit 2) → Initial varnishing (varnishing unit 3) → Enzyme-catalyzed oxidation (enzyme-catalyzed oxidation unit 4) → Circular varnishing and sanding (circular processing unit 5) → Fine polishing (fine polishing unit 6)". The initial varnishing uses traditional raw lacquer to seal the base surface, while subsequent cycles use nano-composite raw lacquer, combined with bio-enzymes to accelerate urushiol polymerization, shortening drying time. Through multiple cycles and fine polishing, a high-quality lacquer film is formed. This significantly shortens the production cycle from the traditional 30-40 days to 10-15 days; it significantly improves the hardness and abrasion resistance of the lacquer film, achieving a pencil hardness of 4H and a 150% increase in abrasion resistance; it reduces dependence on environmental temperature and humidity, while water-based plant dyes and fine polishing enhance the decorative effect, achieving a mirror-like texture.

[0033] In this embodiment, the preparation of the bio-enzyme catalytic drying agent in step S4 includes the following steps: S41. Enzyme activity assay: The enzyme activity of crude laccase was determined by spectrophotometry using ABTS as a substrate. 0.5 mM ABTS solution and an appropriate amount of diluted enzyme solution were added to 1 mL of pH 3.0, 0.1 M citrate-disodium hydrogen phosphate buffer. The absorbance was monitored at 420 nm using a UV spectrophotometer under constant temperature of 30 °C. S42. Buffer solution preparation: Use a 0.1M citrate-disodium hydrogen phosphate buffer system. Accurately weigh a fixed amount of citric acid and disodium hydrogen phosphate, dissolve and bring to volume with ultrapure water, and adjust the pH value to 5.2±0.1. S43. Working solution dilution and preparation: Based on the enzyme activity of the crude enzyme solution measured in step S1, use the buffer solution prepared in step S2 to accurately dilute the solution under a low temperature operating table at 4-10℃, and adjust the enzyme activity of the laccase working solution to the range of 300U / mL±50U / mL. S44. Stabilization treatment: Add 5% anhydrous glycerol and 0.01% potassium sorbate to the prepared working solution; S45. Storage and Use: Dispense the prepared biological drying agent working solution into brown light-proof reagent bottles and store them in a refrigerator at 4℃±1℃ in the dark. Before use, allow it to equilibrate at room temperature for at least 30 minutes and use an air pressure spray gun to ensure uniform spraying and no droplet residue.

[0034] The preparation steps of the bio-enzyme catalytic drying agent are clearly defined. Enzyme activity is determined by spectrophotometry. A buffer solution with a specific pH is prepared, laccase is diluted to the optimal concentration, stabilizers are added, and storage and usage conditions are standardized using the bio-enzyme catalytic drying agent storage component 41 to ensure stable enzyme activity and efficient catalysis of raw lacquer oxidation polymerization. This ensures the catalytic efficiency of the bio-enzyme drying agent, shortening the drying time of each coat of lacquer to 2-4 hours and avoiding uneven drying of the lacquer film caused by unstable enzyme activity. The addition of glycerol and potassium sorbate extends the shelf life of the working solution to 7 days, reducing production costs. Standardized storage and usage methods involving the bio-enzyme catalytic drying agent storage component 41 ensure consistent catalytic effects and improve process stability.

[0035] Specifically, in step S5, the nano-composite raw lacquer is formed by taking finely filtered raw lacquer as the base material, adding 5%-15% of the weight of the raw lacquer nano-alumina powder, 2%-5% of the weight of the raw lacquer nano-silica sol, and an appropriate amount of diluent, and then fully homogenizing and dispersing it using a high-speed disperser.

[0036] The nano-composite raw lacquer uses finely filtered raw lacquer as a base, with the addition of 5%-15% nano-alumina to enhance hardness and 2%-5% nano-silica sol to improve density and adhesion. After homogenization and dispersion by a high-speed disperser 55, a composite structure of "rigid skeleton + dense filler" is formed and stored in a second lacquer container 51. The synergistic effect of nano-alumina and silica increases the hardness of the lacquer film from the traditional 2H to 4H, significantly enhancing wear resistance. The high-speed disperser 55 ensures uniform distribution of nanoparticles, preventing agglomeration, guaranteeing lacquer film density and surface smoothness, and improving gloss to 95GU, creating a unique "porcelain-like" texture. The second lacquer container 51 ensures stable storage of the nano-composite raw lacquer.

[0037] Furthermore, in step S2, the conditions for air drying are a temperature of 25-30°C and a humidity of 75-85%.

[0038] After the base coat treatment, the drying conditions are controlled at a temperature of 25-30℃ and a humidity of 75-85%, and are carried out on the first drying rack 23. This environment is suitable for the curing requirements of water-based plant dyes stored in dye containers 21 and applied by wiping brushes 22, while also providing a stable base for subsequent lacquer coating. To avoid uneven base coat, fading, or wood deformation caused by improper drying conditions, the first drying rack 23 ensures clear wood grain and color development, while the dye containers 21 and wiping brushes 22 ensure even application of the base coat, laying a good foundation for subsequent lacquer film adhesion and improving the consistency of the overall decorative effect.

[0039] Furthermore, the effective usage period of the biological drying agent working solution in step S5 is within 7 days after preparation, and the enzyme activity needs to be re-measured before use.

[0040] The working solution of the bio-catalyst drying agent, stored in the brown, light-proof reagent bottle 411 of the bio-enzyme catalytic drying agent storage component 41, has a shelf life of 7 days. Enzyme activity must be retested before use, as laccase activity decreases over time; exceeding the shelf life or insufficient enzyme activity will affect the catalytic effect. It is sprayed using an ultra-fine atomizing spray gun 42 during use. This prevents prolonged drying time or film defects caused by enzyme activity decay, ensuring stable catalytic efficiency for each batch. The combined use of the bio-enzyme catalytic drying agent storage component 41 and the ultra-fine atomizing spray gun 42 reduces rework due to material failure and lowers production risks.

[0041] Furthermore, the nano-alumina in step S5 is α-phase alumina.

[0042] Alpha-phase alumina is selected as a nano-additive and added to the nano-composite raw lacquer in the second paint container 51. It possesses extremely high hardness (Mohs hardness 9) and chemical stability, and compared to other phases, it significantly enhances the mechanical properties of the paint film. The rigid framework effect of alpha-phase alumina is more pronounced, further strengthening the paint film's scratch resistance and weather resistance, increasing wear resistance by 150%, and providing resistance to acids, alkalis, and moisture erosion, thus extending the furniture's lifespan. The second paint container 51 ensures thorough mixing with other components.

[0043] Furthermore, it also includes a device for applying high-hardness, wear-resistant lacquer to mahogany furniture, comprising a blank polishing unit 1, a base color treatment unit 2, a lacquer application unit 3, an enzyme-catalyzed oxidation unit 4, a circulation treatment unit 5, and a fine polishing unit 6.

[0044] The painting process is broken down into six units: raw material grinding unit 1, base color treatment unit 2, painting unit 3, enzyme-catalyzed oxidation unit 4, circulation treatment unit 5, and fine polishing unit 6. Each unit has a clear division of labor, forming an assembly line operation system. This achieves process standardization and automation, reducing human error. The coordinated operation of units such as raw material grinding unit 1 and base color treatment unit 2 improves production efficiency, while also facilitating equipment maintenance and process parameter optimization, adapting to the needs of large-scale production.

[0045] Furthermore, the blank polishing unit 1 uses a polishing machine to finely polish the blank mahogany furniture until it is smooth and flat; The base color treatment unit 2 includes a dye container 21 for holding water-based plant dye and a rubbing brush 22. The rubbing brush 22 is used to dip into the water-based plant dye and rub the mahogany furniture after it has been treated by the blank polishing unit 1. The base color treatment unit 2 also includes a first shade drying rack 23 for rubbing the mahogany furniture after it has been rubbed. The lacquer wiping unit 3 includes a first lacquer container 31 and a first lacquer wiping brush 32. The first lacquer container 31 is used to hold traditional raw lacquer, and the first lacquer wiping brush 32 is used to dip into traditional raw lacquer and apply it to the mahogany furniture treated by the base color treatment unit 2 for the first time. The enzyme-catalyzed oxidation unit 4 includes a bio-enzyme catalytic drying agent storage component 41, an ultra-fine atomizing spray gun 42, and a second shade drying rack 43. The bio-enzyme catalytic drying agent storage component 41 is used to store the bio-enzyme catalytic drying agent. The ultra-fine atomizing spray gun 42 is connected to the bio-enzyme catalytic drying agent storage component 41 and is used to evenly spray the bio-enzyme catalytic drying agent onto the surface of the paint film that is not completely dry. The second shade drying rack 43 is used to provide an environment of 25-30℃ and 75-85% humidity for the mahogany furniture after spraying the bio-enzyme catalytic drying agent to accelerate the polymerization of urushiol. The recycling unit 5 includes a second paint container 51, a second paint brush 52, a sander 53, and a control component 54. The second paint container 51 is used to hold nano-composite raw paint, the second paint brush 52 is used to dip into the nano-composite raw paint for wiping, the sander 53 is ultra-fine sandpaper of 2000 grit or higher, used to perform slight fine sanding on the paint film after surface drying, and the control component 54 is a single-chip microcomputer processor used to control the "wiping nano paint → enzyme catalysis → fine sanding" process to cycle 4-6 times. The second paint container 51 in the recycling unit 5 is also connected to a high-speed disperser 55, which is used to fully homogenize and disperse the nano-composite raw paint raw material in the second paint container 51 to form nano-composite raw paint. The fine polishing unit 6 includes a beeswax container 61 and a polishing machine 62. The beeswax container 61 is used to hold natural beeswax, and the polishing machine 62 is used to dip into the natural beeswax and manually polish the mahogany furniture after it has been treated by the circulation processing unit 5 to obtain a mirror effect.

[0046] The core components of each unit are defined in detail. For example, the blank grinding unit 1 uses a grinding machine, and the enzyme catalytic oxidation unit 4 uses an ultra-fine atomizing spray gun 42. The functions of each component are clearly defined. For example, the control component 54 of the circulation processing unit 5 controls the circulation 4-6 times to ensure the precise execution of each step. Specialized equipment such as the second paint brush 52 and the ultra-fine atomizing spray gun 42 improve the uniformity of coating and catalysis; the grinding machine 53 with sandpaper of 2000 grit or higher reduces paint film damage; and the automated circulation of the control component 54 ensures process consistency, ultimately achieving a stable improvement in paint film performance and reaching the "optimal" adhesion level.

[0047] Furthermore, the bio-enzyme catalytic drying agent storage component 41 includes a brown light-proof reagent bottle 411 and a refrigerator 412. The brown light-proof reagent bottle 411 is used to dispense the bio-enzyme catalytic drying agent working solution, and the refrigerator 412 is used to store the brown light-proof reagent bottle 411 in a light-proof environment at 4℃±1℃.

[0048] The bio-enzyme catalytic drying agent storage component 41 includes a brown light-proof reagent bottle 411 and a refrigerator 412. The brown light-proof reagent bottle 411 protects against ultraviolet rays, while the refrigerator 412 controls the temperature at 4℃±1℃, delaying laccase protein denaturation and maintaining enzyme activity. This effectively maintains enzyme activity stability, ensuring that the catalytic efficiency of the working solution meets the standard within the 7-day shelf life. The combined use of the brown light-proof reagent bottle 411 and the refrigerator 412 reduces material waste caused by improper storage and lowers production costs.

[0049] Furthermore, both the first drying rack 23 and the second drying rack 43 include a temperature and humidity control module, which is used to control the temperature of the drying environment at 25-30℃ and the humidity at 75-85%.

[0050] Both the first and second shade drying racks 23 and 43 include temperature and humidity control modules to precisely maintain a temperature of 25-30℃ and a humidity of 75-85%, adapting to the biochemical requirements of raw lacquer oxidation polymerization and water-based dye curing. To avoid paint film wrinkling, bubbling, or uneven drying caused by fluctuations in ambient temperature and humidity, the temperature and humidity control modules of the first and second shade drying racks 23 and 43 improve process stability; precise temperature and humidity control maximizes enzyme catalytic efficiency, ensuring that the drying time for each pass is consistently within 6 hours, shortening the overall cycle time.

[0051] Finally, it should be noted that the electronic components in the control components 54 and other components in this embodiment are all general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, all the above-mentioned electrical components are connected by wires. The specific connection method should refer to the working order of each electrical component in the above working principle to complete the electrical connection. All of these are technologies known in the art.

[0052] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for producing a high-hardness, wear-resistant coating for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation, characterized in that: Includes the following steps: S1. Raw material processing: Finely sand the unfinished rosewood furniture until it is smooth and flat; S2. Base color treatment: Use water-based plant dyes to rub the wood grain to reveal it, and then let it air dry. S3. First coat of lacquer: Apply the first layer of traditional raw lacquer evenly to seal the bottom surface. Then place the mahogany furniture in a shade room and let it air dry for 6-8 hours at a temperature of 25-30℃ and a humidity of 75-85%. S4. Enzyme-catalyzed oxidation: Using an ultra-fine atomizing spray gun, the bio-enzyme catalytic drying agent is evenly sprayed onto the surface of the not-completely-dried paint film, and then placed back into the above-mentioned shade chamber to accelerate the polymerization of urushiol. The drying time for this stage is 2-4 hours. The bio-enzyme catalytic drying agent is an enzyme solution prepared by dissolving laccase in a buffer solution with a pH value of 4.5-6.

0. S5. Cyclic wiping and sanding: Apply nano-composite raw lacquer for the second wiping, and immediately repeat the enzyme-catalyzed oxidation process of step S4. After the surface is dry, use ultra-fine sandpaper of 2000 grit or higher to lightly and finely sand to remove particles. Repeat the above cycle of "wiping nano-lacquer → enzyme catalysis → fine sanding" 4-6 times, and shorten the interval between each wiping to within 6 hours. S6. Fine polishing: After all coatings are applied, allow 7-10 days for natural stabilization, and finally hand polish with natural beeswax to achieve a mirror finish.

2. The method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation according to claim 1, characterized in that: The preparation of the bio-enzyme-catalyzed drying agent in step S4 includes the following steps: S41. Enzyme activity assay: The enzyme activity of crude laccase was determined by spectrophotometry using ABTS as a substrate. 0.5 mM ABTS solution and an appropriate amount of diluted enzyme solution were added to 1 mL of pH 3.0, 0.1 M citrate-disodium hydrogen phosphate buffer. The absorbance was monitored at 420 nm using a UV spectrophotometer under constant temperature of 30 °C. S42. Buffer solution preparation: Use a 0.1M citrate-disodium hydrogen phosphate buffer system. Accurately weigh a fixed amount of citric acid and disodium hydrogen phosphate, dissolve and bring to volume with ultrapure water, and adjust the pH value to 5.2±0.

1. S43. Working solution dilution and preparation: Based on the enzyme activity of the crude enzyme solution measured in step S1, use the buffer solution prepared in step S2 to accurately dilute the solution at a low temperature of 4-10℃ to adjust the enzyme activity of the laccase working solution to the range of 300U / mL±50U / mL. S44. Stabilization treatment: Add 5% anhydrous glycerol and 0.01% potassium sorbate to the prepared working solution; S45. Storage and Use: Dispense the prepared biological drying agent working solution into brown light-proof reagent bottles and store them in a refrigerator at 4℃±1℃ in the dark. Before use, allow it to equilibrate at room temperature for at least 30 minutes and use an air pressure spray gun to ensure even spraying and no droplet residue.

3. The method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation according to claim 1, characterized in that: In step S5, the nano-composite raw lacquer is formed by taking finely filtered raw lacquer as the base material, adding 5%-15% of the weight of the raw lacquer nano-alumina powder, 2%-5% of the weight of the raw lacquer nano-silica sol and an appropriate amount of diluent, and then fully homogenizing and dispersing it using a high-speed disperser.

4. The method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation according to claim 1, characterized in that: In step S2, the conditions for air drying are a temperature of 25-30℃ and a humidity of 75-85%.

5. The method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation according to claim 1, characterized in that: The effective usage period of the biological drying agent working solution in step S5 is within 7 days after preparation, and the enzyme activity needs to be re-measured before use.

6. The method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation according to claim 1, characterized in that: The nano-alumina mentioned in step S5 is α-phase alumina.

7. The method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation according to claim 1, characterized in that: It also includes a device for applying high-hardness, wear-resistant lacquer to mahogany furniture, including a blank polishing unit (1), a base color treatment unit (2), a lacquer application unit (3), an enzyme-catalyzed oxidation unit (4), a recycling unit (5), and a fine polishing unit (6).

8. The method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation according to claim 7, characterized in that: The blank polishing unit (1) uses a polishing machine to finely polish the blank mahogany furniture until it is smooth and flat; The base color treatment unit (2) includes a dye container (21) for holding water-based plant dye and a rubbing brush (22). The rubbing brush (22) is used to dip into the water-based plant dye to rub the mahogany furniture after it has been treated by the blank polishing unit (1). The base color treatment unit (2) also includes a first shade drying rack (23) for shading the rubbed mahogany furniture. The lacquer wiping unit (3) includes a first lacquer container (31) and a first lacquer wiping brush (32). The first lacquer container (31) is used to hold traditional raw lacquer, and the first lacquer wiping brush (32) is used to dip into traditional raw lacquer and apply it to the mahogany furniture treated by the base color treatment unit (2) for the first time. The enzyme-catalyzed oxidation unit (4) includes a bio-enzyme catalytic drying agent storage component (41), an ultra-fine atomizing spray gun (42), and a second shade drying rack (43). The bio-enzyme catalytic drying agent storage component (41) is used to store the bio-enzyme catalytic drying agent. The ultra-fine atomizing spray gun (42) is connected to the bio-enzyme catalytic drying agent storage component (41) and is used to spray the bio-enzyme catalytic drying agent evenly on the surface of the paint film that is not completely dry. The second shade drying rack (43) is used to provide an environment with a temperature of 25-30℃ and a humidity of 75-85% for the mahogany furniture after spraying the bio-enzyme catalytic drying agent in order to accelerate the polymerization of urushiol. The recycling unit (5) includes a second paint container (51), a second paint brush (52), a polishing machine (53), and a control component (54). The second paint container (51) is used to hold nano-composite raw paint, the second paint brush (52) is used to dip into the nano-composite raw paint for wiping, and the polishing machine (53) is ultra-fine sandpaper with a mesh size of 2000 or higher, used to perform slight fine polishing on the paint film after surface drying. The control component (54) adopts a single-chip microcomputer processor to control the "wiping nano-paint → enzyme catalysis → fine polishing" process to cycle 4-6 times. The second paint container (51) in the recycling unit (5) is also connected to a high-speed disperser (55), which is used to fully homogenize and disperse the nano-composite raw paint raw material in the second paint container (51) to form nano-composite raw paint. The fine polishing unit (6) includes a beeswax container (61) and a polishing machine (62). The beeswax container (61) is used to hold natural beeswax, and the polishing machine (62) is used to dip into the natural beeswax and hand polish the mahogany furniture treated by the recycling unit (5) to obtain a mirror effect.

9. The method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation according to claim 8, characterized in that: The bio-enzyme catalytic drying agent storage component (41) includes a brown light-proof reagent bottle (411) and a refrigerator (412). The brown light-proof reagent bottle (411) is used to dispense the bio-enzyme catalytic drying agent working solution, and the refrigerator (412) is used to store the brown light-proof reagent bottle (411) in the light-proof environment at 4℃±1℃.

10. The method for producing high-hardness, wear-resistant lacquer for mahogany furniture based on nano-modified raw lacquer and enzyme-catalyzed oxidation according to claim 9, characterized in that: The first drying rack (23) and the second drying rack (43) both include a temperature and humidity control module, which is used to control the temperature of the drying environment at 25-30℃ and the humidity at 75-85%.

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