High-strength shaving board and preparation method thereof
By preparing core-shell structure adhesive, the modified monomer of polyphenol structure enhances the mechanical properties and antibacterial properties of particleboards, the problems of insufficient strength and lack of antibacterial functions of traditional particleboards are solved, and high-strength and efficient antibacterial particleboard preparation is achieved.
Patent Information
- Application Number
- CN202510853665.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-24
- Publication Date
- 2025-08-05
AI Technical Summary
Traditional particle boards have insufficient mechanical properties, poor dimensional stability, and lack antibacterial functions. The existing modification methods are difficult to take into account strength, water resistance and antibacterial properties, and inaccurate control of hot pressing process parameters affects product performance stability.
Core-shell structural adhesives are prepared by modified monomers containing polyphenol structures. The core-shell structural adhesives are formed by combining polyvinyl chloride hard core and acrylate soft shell to enhance the interface bonding strength and block moisture penetration, and the antibacterial effect is achieved by combining the electrostatic adsorption and hydrogen bonding of the modified monomers.
The mechanical properties and antibacterial properties of particle board are significantly improved, and the parallel static curve strength and internal binding strength are significantly improved, with an antibacterial rate of up to 99%, solving the problems of insufficient strength and lack of antibacterial functions of traditional particle board.
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Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of particleboard preparation, and in particular to a high-strength particleboard and a preparation method thereof. Background Art
[0002] Particleboard, as an economical and environmentally friendly man-made board, is widely used in furniture manufacturing, architectural decoration and other fields.
[0003] However, traditional particleboard suffers from issues such as insufficient mechanical properties and poor dimensional stability, severely impacting its use and added value. Common particleboards currently on the market often use urea-formaldehyde or phenol-formaldehyde resins as adhesives. While these are relatively low-cost, they suffer from deficiencies such as insufficient bonding strength and poor water resistance, making them prone to delamination and deformation in humid environments. In recent years, research has attempted to improve performance by modifying adhesives with polyurethane or epoxy resins, but these approaches often face challenges such as complex processes, high costs, and environmental concerns. Regarding reinforcement and modification, existing technologies often enhance strength by adding inorganic fillers or fibers to the adhesive. However, this approach can lead to decreased adhesive fluidity, impacting the uniformity and surface quality of the board. Furthermore, conventional particleboard lacks antimicrobial properties and is susceptible to mold growth in humid environments, which not only affects aesthetics but can also pose health risks. While some studies have attempted to improve this by adding antimicrobial agents, these commonly suffer from poor compatibility with the substrate and insufficient antimicrobial durability. Adhesives using a single polymer system in existing technologies often find it difficult to meet multiple requirements such as strength, water resistance and antibacterial properties. In addition, inaccurate control of hot pressing process parameters can easily lead to stress concentration inside the board, affecting product performance stability.
[0004] Therefore, in order to solve the above problems, the present invention provides a high-strength particleboard and a preparation method thereof. Summary of the Invention
[0005] The present invention provides a high-strength particleboard and a preparation method thereof, which solves the defects in the related art.
[0006] The technical solutions of the present invention are as follows: The present invention provides a method for preparing a high-strength particleboard, comprising the following steps: Step 1: Add the emulsifier to deionized water and dissolve it fully. Then slowly add butyl acrylate, styrene, methacrylic acid, hydroxyethyl acrylate, and modified monomer. Emulsify at high shear speed for 10-15 minutes to form a pre-emulsion. Step 2: Under a protective atmosphere, polyvinyl chloride latex is mixed with sodium bisulfite solution, heated to 60-70°C, stirred for 10-20 minutes, and then the pre-emulsion and sodium persulfate solution are slowly added dropwise, and the reaction is maintained at a constant temperature for 30-40 minutes. Finally, the temperature is lowered to 40°C, hydrogen peroxide is added, and the reaction is continued for 1-2 hours. The reaction solution is passed through a 200-mesh sieve and the pH value is adjusted to 7-8 to obtain a modified emulsion; Step 3: Mix the wood chips and modified emulsion evenly, add them into a mold, and hot press them at a temperature of 100-110°C for 10-20 minutes to obtain a high-strength particleboard.
[0007] In this scheme, the emulsifier's ability to reduce interfacial tension is first utilized to disperse the oil-soluble monomer into tiny droplets that remain stable in the aqueous phase. Subsequently, under a protective atmosphere, polyvinyl chloride latex is mixed with sodium bisulfite. A pre-emulsion and sodium persulfate initiator are slowly added dropwise with stirring, triggering a free radical emulsion polymerization reaction. Free radicals generated by the decomposition of the initiator trigger monomer chain growth within or on the surface of the latex particles, ultimately forming core-shell latex particles with a polyvinyl chloride core and an acrylate copolymer shell. Sodium bisulfite acts as a chain transfer agent to regulate the polymer's molecular weight distribution, while the subsequent addition of hydrogen peroxide further promotes the complete polymerization of unreacted monomers, ensuring stable emulsion performance.
[0008] More optimally, the pre-emulsion includes the following components: by weight, 3-4 parts of emulsifier, 40-50 parts of butyl acrylate, 30-40 parts of styrene, 2-5 parts of methacrylic acid, 2-5 parts of hydroxyethyl acrylate, 20-25 parts of modified monomer, and 100-120 parts of deionized water.
[0009] More optimally, the raw materials in the modified emulsion include the following components: by weight, 40-60 parts of polyvinyl chloride latex, 0.1-0.3 parts of sodium bisulfite solution, 110-120 parts of pre-emulsion, 0.1-0.3 parts of sodium persulfate solution, and 0.1-0.2 parts of hydrogen peroxide; wherein the mass fraction of the sodium bisulfite solution is 5-8wt%, and the mass fraction of the sodium persulfate solution is 2-5wt%.
[0010] More optimally, the mass ratio of the wood shavings to the modified emulsion is 9:(1-2).
[0011] More optimally, the preparation process of the modified monomer is: S1: 4-Methylaminopyridine and 2,3,4-trihydroxybenzaldehyde were added to ethanol, stirred evenly, and acetic acid was added dropwise. The temperature was raised to 60-70°C and refluxed for 2-4 hours. After the reaction, the mixture was cooled to room temperature, and the solvent was removed by distillation under reduced pressure. The mixture was recrystallized and purified by column chromatography to obtain intermediate A. S2: Mix intermediate A with dimethyl sulfoxide, stir evenly, slowly add 3-bromopropylene, raise the temperature to 80-90°C, react for 24 hours, and after the reaction is completed, naturally cool to room temperature, add anhydrous ethanol, shake and let stand to separate, remove the upper ethanol phase, repeat washing 2-3 times, then transfer to boiling water, stir until completely dissolved, slowly cool, filter, and dry to obtain the modified monomer.
[0012] In the scheme, the amino group in 4-methylaminopyridine is nucleophilic and can attack the carbonyl carbon in the aldehyde group. Acetic acid provides a slightly acidic environment, which helps the aldehyde group protonate and enhances its electrophilicity, thereby promoting nucleophilic attack. The specific synthesis process is shown below:
[0013] More optimally, the intermediate A raw material includes the following components: by weight, 10-12 parts of 4-methylaminopyridine, 16-18 parts of 2,3,4-trihydroxybenzaldehyde, 80-100 parts of ethanol, and 0.6-0.8 parts of acetic acid.
[0014] In the scheme, intermediate A contains a pyridine ring structure, in which the nitrogen atom is easily activated in a highly polar solvent, thereby acting as a nucleophile to perform a nucleophilic attack on the α-carbon in 3-bromopropylene. The specific reaction process is shown below:
[0015] More optimally, the modified monomer raw material includes the following components: 26-28 parts of intermediate A, 80-100 parts of dimethyl sulfoxide, and 15-18 parts of 3-bromopropylene, by weight.
[0016] The working principle and beneficial effects of the present invention are: The present invention synthesizes an antibacterial modified monomer containing a polyphenol structure and prepares a core-shell structure adhesive based on the monomer, so that the resulting particleboard has both excellent mechanical properties and antibacterial properties. The details are as follows: First: In the scheme, the prepared modified monomer contains a pyridine quaternary ammonium salt structure, which has a high-density positive charge and can adsorb negatively charged bacterial cell membranes through electrostatic action, destroying the integrity of the cell membrane and causing leakage of intracellular substances. Compared with traditional quaternary ammonium salts, the positive charge of the pyridine ring is more concentrated and the antibacterial activity is stronger; at the same time, the polyphenol structure it contains can also form hydrogen bonds with the polar groups on the surface of the wood chips, enhancing interfacial adhesion and improving the mechanical properties of the material.
[0017] Second, the adhesive's core, a polyvinyl chloride (PVC) core, effectively resists external stresses. The soft acrylic copolymer shell, through its flexible molecular chains, penetrates the pores of the wood fiber, creating an anchoring effect. This significantly enhances the interfacial bond between the adhesive and the wood fiber, making the particleboard less susceptible to delamination when subjected to bending or tensile loads. Furthermore, the hydrophobic nature of the acrylic copolymer shell effectively blocks moisture penetration, reducing hygroscopic expansion of the wood fiber. DETAILED DESCRIPTION
[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.
[0019] Example 1: A method for preparing a high-strength particleboard, comprising the following steps: Step 1: Add 3 parts of emulsifier (SR-10) to 100 parts of deionized water. After fully dissolving, slowly add 40 parts of butyl acrylate, 30 parts of styrene, 2 parts of methacrylic acid, 2 parts of hydroxyethyl acrylate, and 20 parts of modified monomer. Emulsify at high shear speed for 10 minutes to form a pre-emulsion. Step 2: Under a protective atmosphere, 40 parts of polyvinyl chloride latex and 0.1 parts of sodium bisulfite solution (mass fraction 5wt%, solvent is deionized water) were mixed, heated to 60°C, stirred for 10 minutes, and then 110 parts of pre-emulsion and 0.1 parts of sodium persulfate solution (mass fraction 2wt%, solvent is deionized water) were slowly added dropwise. The reaction was maintained at a constant temperature for 30 minutes. Finally, the temperature was lowered to 40°C, 0.1 parts of hydrogen peroxide were added, and the reaction was continued for 1 hour. The reaction solution was passed through a 200-mesh sieve and the pH value was adjusted to 7 to obtain a modified emulsion. Step 3: The wood chips and the modified emulsion are mixed evenly, added into a mold, and hot-pressed for 10 minutes at a temperature of 100° C. to produce a high-strength particleboard; the mass ratio of the wood chips to the modified emulsion is 9:1; Wherein, the preparation process of the modified monomer is: S1: 10 parts of 4-methylaminopyridine and 16 parts of 2,3,4-trihydroxybenzaldehyde were added to 80 parts of ethanol, stirred evenly, and 0.6 parts of acetic acid was added dropwise. The temperature was raised to 60°C and refluxed for 2 hours. After the reaction was completed, the mixture was cooled to room temperature, and the solvent was removed by distillation under reduced pressure. The mixture was recrystallized and purified by column chromatography to obtain intermediate A. S2: Mix 26 parts of intermediate A with 80 parts of dimethyl sulfoxide, stir evenly, slowly add 15 parts of 3-bromopropylene, raise the temperature to 80°C, react for 24 hours, and after the reaction is completed, naturally cool to room temperature, add anhydrous ethanol, shake and let stand to separate, remove the upper ethanol phase, repeat washing twice, then transfer to boiling water, stir until completely dissolved, slowly cool, filter, and dry to obtain the modified monomer.
[0020] Example 2: A method for preparing a high-strength particleboard, comprising the following steps: Step 1: Add 4 parts of emulsifier (SR-10) to 120 parts of deionized water. After fully dissolving, slowly add 50 parts of butyl acrylate, 40 parts of styrene, 5 parts of methacrylic acid, 5 parts of hydroxyethyl acrylate, and 25 parts of modified monomer. Emulsify at high shear speed for 15 minutes to form a pre-emulsion. Step 2: Under a protective atmosphere, 60 parts of polyvinyl chloride latex and 0.3 parts of sodium bisulfite solution (mass fraction 8wt%, solvent is deionized water) were mixed, heated to 70°C, stirred for 20 minutes, and then 120 parts of pre-emulsion and 0.3 parts of sodium persulfate solution (mass fraction 5wt%, solvent is deionized water) were slowly added dropwise. The reaction was kept at a constant temperature for 40 minutes, and finally the temperature was lowered to 40°C, 0.2 parts of hydrogen peroxide were added, and the reaction was continued for 2 hours. The reaction solution was passed through a 200-mesh sieve and the pH value was adjusted to 8 to obtain a modified emulsion; Step 3: The wood chips and the modified emulsion are mixed evenly, added into a mold, and hot pressed at a temperature of 110° C. for 20 minutes to produce a high-strength particleboard; the mass ratio of the wood chips to the modified emulsion is 9:2; Wherein, the preparation process of the modified monomer is: S1: Add 12 parts of 4-methylaminopyridine and 18 parts of 2,3,4-trihydroxybenzaldehyde to 100 parts of ethanol, stir evenly, add 0.8 parts of acetic acid dropwise, raise the temperature to 70°C, and reflux for 4 hours. After the reaction is completed, cool to room temperature, remove the solvent by distillation under reduced pressure, recrystallize, and purify by column chromatography to obtain intermediate A; S2: Mix 28 parts of intermediate A with 100 parts of dimethyl sulfoxide, stir evenly, slowly add 18 parts of 3-bromopropylene, raise the temperature to 90°C, react for 24 hours, and after the reaction is completed, naturally cool to room temperature, add anhydrous ethanol, shake and let stand to separate, remove the upper ethanol phase, repeat washing 3 times, then transfer to boiling water, stir until completely dissolved, slowly cool, filter, and dry to obtain the modified monomer.
[0021] Example 3: A method for preparing a high-strength particleboard, comprising the following steps: Step 1: Add 3.5 parts of emulsifier (SR-10) to 110 parts of deionized water. After fully dissolving, slowly add 45 parts of butyl acrylate, 35 parts of styrene, 3.5 parts of methacrylic acid, 3.5 parts of hydroxyethyl acrylate, and 22.5 parts of modified monomer. Emulsify at high shear speed for 12.5 minutes to form a pre-emulsion. Step 2: Under a protective atmosphere, 50 parts of polyvinyl chloride latex and 0.2 parts of sodium bisulfite solution (mass fraction of 6.5wt%, solvent is deionized water) were mixed, heated to 65°C, stirred for 15 minutes, and then 115 parts of pre-emulsion and 0.2 parts of sodium persulfate solution (mass fraction of 3.5wt%, solvent is deionized water) were slowly added dropwise. The reaction was kept at a constant temperature for 35 minutes, and finally the temperature was lowered to 40°C, 0.15 parts of hydrogen peroxide were added, and the reaction was continued for 1.5 hours. The reaction solution was passed through a 200-mesh sieve and the pH value was adjusted to 7.5 to obtain a modified emulsion; Step 3: The wood chips and the modified emulsion are mixed evenly, added into a mold, and hot pressed for 15 minutes at a temperature of 105° C. to obtain a high-strength particleboard; the mass ratio of the wood chips to the modified emulsion is 9:1.5; Wherein, the preparation process of the modified monomer is: S1: 11 parts of 4-methylaminopyridine and 17 parts of 2,3,4-trihydroxybenzaldehyde were added to 90 parts of ethanol, stirred evenly, and 0.7 parts of acetic acid was added dropwise. The temperature was raised to 65°C and refluxed for 3 hours. After the reaction was completed, the mixture was cooled to room temperature, and the solvent was removed by distillation under reduced pressure. The mixture was recrystallized and purified by column chromatography to obtain intermediate A. S2: Mix 27 parts of intermediate A with 90 parts of dimethyl sulfoxide, stir evenly, slowly add 16.5 parts of 3-bromopropylene, raise the temperature to 85°C, react for 24 hours, and after the reaction is completed, naturally cool to room temperature, add anhydrous ethanol, shake and let stand to separate, remove the upper ethanol phase, repeat washing 2.5 times, then transfer to boiling water, stir until completely dissolved, slowly cool, filter, and dry to obtain the modified monomer.
[0022] Comparative Example 1: No modifying monomer was added, and the rest was the same as Example 3, specifically as follows: Step 1: Add 3.5 parts of emulsifier (SR-10) to 110 parts of deionized water. After fully dissolving, slowly add 45 parts of butyl acrylate, 35 parts of styrene, 3.5 parts of methacrylic acid, and 3.5 parts of hydroxyethyl acrylate and emulsify at high speed for 12.5 minutes to form a pre-emulsion. Step 2: Under a protective atmosphere, 50 parts of polyvinyl chloride latex and 0.2 parts of sodium bisulfite solution (mass fraction of 6.5wt%, solvent is deionized water) were mixed, heated to 65°C, stirred for 15 minutes, and then 115 parts of pre-emulsion and 0.2 parts of sodium persulfate solution (mass fraction of 3.5wt%, solvent is deionized water) were slowly added dropwise. The reaction was kept at a constant temperature for 35 minutes, and finally the temperature was lowered to 40°C, 0.15 parts of hydrogen peroxide were added, and the reaction was continued for 1.5 hours. The reaction solution was passed through a 200-mesh sieve and the pH value was adjusted to 7.5 to obtain a modified emulsion; Step 3: Evenly mix the wood chips and the modified emulsion, add the mixture into a mold, and hot-press for 15 minutes at a temperature of 105° C. to obtain a high-strength particleboard; the mass ratio of the wood chips to the modified emulsion is 9:1.5.
[0023] Comparative Example 2: No polyvinyl chloride latex was introduced, and the rest was the same as Example 3, specifically as follows: Step 1: Add 3.5 parts of emulsifier (SR-10) to 110 parts of deionized water. After fully dissolving, slowly add 45 parts of butyl acrylate, 35 parts of styrene, 3.5 parts of methacrylic acid, 3.5 parts of hydroxyethyl acrylate, and 22.5 parts of modified monomer. Emulsify at high speed for 12.5 minutes. Raise the temperature to 70-80°C. Add 0.2 parts of sodium persulfate solution (mass fraction 3.5wt%, solvent is deionized water). Maintain constant temperature for 35 minutes to obtain a modified emulsion. Step 2: The wood chips and the modified emulsion are mixed evenly, added into a mold, and hot pressed for 15 minutes at a temperature of 105° C. to produce a high-strength particleboard; the mass ratio of the wood chips to the modified emulsion is 9:1.5; Wherein, the preparation process of the modified monomer is: S1: 11 parts of 4-methylaminopyridine and 17 parts of 2,3,4-trihydroxybenzaldehyde were added to 90 parts of ethanol, stirred evenly, and 0.7 parts of acetic acid was added dropwise. The temperature was raised to 65°C and refluxed for 3 hours. After the reaction was completed, the mixture was cooled to room temperature, and the solvent was removed by distillation under reduced pressure. The mixture was recrystallized and purified by column chromatography to obtain intermediate A. S2: Mix 27 parts of intermediate A with 90 parts of dimethyl sulfoxide, stir evenly, slowly add 16.5 parts of 3-bromopropylene, raise the temperature to 85°C, react for 24 hours, and after the reaction is completed, naturally cool to room temperature, add anhydrous ethanol, shake and let stand to separate, remove the upper ethanol phase, repeat washing 2.5 times, then transfer to boiling water, stir until completely dissolved, slowly cool, filter, and dry to obtain the modified monomer.
[0024] Testing: The high-strength particleboards obtained in the examples and comparative examples were made into standard specimens of 50 mm × 50 mm (thickness 18 mm) and subjected to the following tests: (1) After the surfaces of the standard samples of the examples and comparative examples were disinfected with ethanol and treated with ultraviolet light, they were smeared with Staphylococcus aureus and Escherichia coli at a concentration of 107 CFU / mL, covered with sterile PE film and allowed to stand for 1 hour (25±1°C). The sample surfaces were then rinsed with phosphate buffered saline (PBS), the rinse solution was collected and diluted, and then smeared on nutrient agar (Staphylococcus aureus) or MacConkey agar (Escherichia coli) culture medium. After incubation at 37°C for 24 hours, the number of colonies was counted and the antibacterial rate was calculated; (2) According to GB / T17657-2013, parallel static bending strength was measured; the standard specimen was placed in a parallel direction, the span was strictly set to 20 times the specimen thickness (18 mm), and the loading head applied pressure at a constant speed of 10 mm / min until the specimen broke; the parallel static bending strength was calculated; (3) According to GB / T17657-2013, the internal bonding strength was measured. Before the test, the specimen was balanced in an environment with a temperature of 23±2°C and a relative humidity of 50±5% for more than 48 hours. A universal testing machine was used to perform a vertical tensile test. Both sides of the specimen were bonded to a metal fixture using AB glue or epoxy resin. During the test, a tensile force was applied vertically at a constant speed (usually 2 mm / min) until the specimen was delaminated and damaged. The internal bonding strength was calculated. The obtained data are shown in Table 1 below: Table 1
[0025] Conclusion: The high-strength particleboard and its preparation method provided by this invention significantly improve the mechanical and antibacterial properties of the particleboard through the innovative design of modified monomers and core-shell adhesives. Test data from Examples 1-3 showed parallel static bending strengths reaching 28 MPa, 33 MPa, and 34 MPa, respectively, and internal bonding strengths of 0.61 MPa, 0.58 MPa, and 0.62 MPa, respectively. The antibacterial rates against Staphylococcus aureus and Escherichia coli both exceeded 99%, demonstrating that this technical solution excels in strength, adhesion, and antibacterial properties.
[0026] Comparative Example 1, which lacks the modified monomer, exhibits significant decreases in parallel flexural strength and internal bonding strength (22 MPa and 0.45 MPa), as well as a significant reduction in antibacterial rate (approximately 90%). This demonstrates that the introduction of the modified monomer plays a key role in improving mechanical properties and antibacterial properties. Its polyphenol structure and quaternary pyridinium salt not only enhance interfacial adhesion but also achieve high antibacterial efficacy by disrupting bacterial cell membranes. Comparative Example 2, which lacks PVC latex, exhibits further decreases in parallel flexural strength (18 MPa) and internal bonding strength (0.34 MPa), demonstrating that the PVC core, acting as a rigid support framework, is crucial for resisting external stresses. The absence of a core-shell structure leads to a decline in the adhesive's overall performance. Although the antibacterial rate of Comparative Example 2 remains high (approximately 96%), the lack of mechanical properties highlights the importance of the core-shell synergistic effect.
[0027] In summary, the success of the present invention lies in solving the problems of insufficient strength, poor water resistance and lack of antibacterial function of traditional particleboard through the synergistic effect of modified monomers and core-shell structure, providing an effective solution for optimizing the performance of particleboard.
[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A method for preparing a high-strength particleboard, characterized in that: The following steps are involved: Step 1: Add the emulsifier to deionized water and dissolve it fully. Then slowly add butyl acrylate, styrene, methacrylic acid, hydroxyethyl acrylate, and modified monomer. Emulsify at high shear speed for 10-15 minutes to form a pre-emulsion. Step 2: Under a protective atmosphere, polyvinyl chloride latex is mixed with sodium bisulfite solution, heated to 60-70°C, stirred for 10-20 minutes, and then the pre-emulsion and sodium persulfate solution are slowly added dropwise, and the reaction is maintained at a constant temperature for 30-40 minutes. Finally, the temperature is lowered to 40°C, hydrogen peroxide is added, and the reaction is continued for 1-2 hours. The reaction solution is passed through a 200-mesh sieve and the pH value is adjusted to 7-8 to obtain a modified emulsion; Step 3: Mix the wood chips and modified emulsion evenly, add them into a mold, and hot press them at a temperature of 100-110°C for 10-20 minutes to obtain a high-strength particleboard.
2. The method for preparing a high-strength particleboard according to claim 1, wherein: The pre-emulsion comprises the following components: by weight, 3-4 parts of emulsifier, 40-50 parts of butyl acrylate, 30-40 parts of styrene, 2-5 parts of methacrylic acid, 2-5 parts of hydroxyethyl acrylate, 20-25 parts of modified monomer, and 100-120 parts of deionized water.
3. The method for preparing a high-strength particleboard according to claim 1, wherein: The raw materials in the modified emulsion include the following components: 40-60 parts of polyvinyl chloride latex, 0.1-0.3 parts of sodium bisulfite solution, 110-120 parts of pre-emulsion, 0.1-0.3 parts of sodium persulfate solution, and 0.1-0.2 parts of hydrogen peroxide, wherein the mass fraction of the sodium bisulfite solution is 5wt%-8wt%, and the mass fraction of the sodium persulfate solution is 2wt%-5wt%.
4. The method for preparing a high-strength particleboard according to claim 1, wherein: The mass ratio of the wood chips to the modified emulsion is 9:1-2.
5. The method for preparing a high-strength particleboard according to claim 1, wherein: The preparation process of the modified monomer is: S1: 4-Methylaminopyridine and 2,3,4-trihydroxybenzaldehyde were added to ethanol, stirred evenly, and acetic acid was added dropwise. The temperature was raised to 60-70°C and refluxed for 2-4 hours. After the reaction, the mixture was cooled to room temperature, and the solvent was removed by distillation under reduced pressure. The mixture was recrystallized and purified by column chromatography to obtain intermediate A. S2: Mix intermediate A with dimethyl sulfoxide, stir evenly, slowly add 3-bromopropylene, raise the temperature to 80-90°C, react for 24 hours, and after the reaction is completed, naturally cool to room temperature, add anhydrous ethanol, shake and let stand to separate, remove the upper ethanol phase, repeat washing 2-3 times, then transfer to boiling water, stir until completely dissolved, slowly cool, filter, and dry to obtain the modified monomer.
6. The method for preparing a high-strength particleboard according to claim 5, wherein: The intermediate A raw material includes the following components: by weight, 10-12 parts of 4-methylaminopyridine, 16-18 parts of 2,3,4-trihydroxybenzaldehyde, 80-100 parts of ethanol, and 0.6-0.8 parts of acetic acid.
7. The method for preparing a high-strength particleboard according to claim 5, characterized in that: The modified monomer raw material comprises the following components: 26-28 parts of intermediate A, 80-100 parts of dimethyl sulfoxide, and 15-18 parts of 3-bromopropylene, calculated by weight.
8. A high-strength particleboard, characterized by: The high-strength particleboard is prepared by the preparation method of any one of claims 1 to 7.