Process for the production of an antibacterial veneered particle board

Abstract

The application discloses a preparation process of antibacterial veneered chipboard, which comprises the following steps: polymerizing and emulsifying a modifier, methyl methacrylate, butyl acrylate and acrylamide to obtain a modified emulsion; and mixing the chip with the modified emulsion and hot-pressing to form a shape. The organic antibacterial agent and the inorganic antibacterial agent are combined, when bacteria contact the veneered chipboard, the bacteria can be quickly adsorbed, the bacterial cell membrane is destroyed, the protein inside the bacterial cell is leaked, the bacteria death effect is achieved, meanwhile, the titanium dioxide on the surface is irradiated, the electrons can be excited from the valence band to the conduction band, meanwhile, the corresponding holes are generated in the valence band, under the action of the electric field, the electrons and the holes are separated, migrate to different positions on the surface and react, the generated superoxide anion free radicals can react with the organic matters in the bacteria to kill the bacteria, compared with the traditional organic antibacterial agent, the preparation process will not appear precipitation, and the persistence of the antibacterial effect is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shaving board preparation, and particularly relates to a preparation process of antibacterial veneered shaving board. BACKGROUND

[0002] The rapid development of the times makes people have higher pursuit of the quality of life, and the demand for wood and wood products is increasing in quantity and quality. Wood product production is facing the dilemma of shortage of wood resources. Shaving board is a non-structural board made of wood processing residues, small diameter wood or fiber materials from non-wood plants, which is processed into shavings or shavings and mixed with adhesive and hot pressed into a board. The shaving board has the characteristics of high bending strength, not easy to deform, superior performance, surface wear resistance, high temperature resistance, easy to maintain, acid and alkali corrosion resistance, stain resistance, high added value and texture diversity, and is widely used in furniture, floor, door, decorative wallboard, table top and other fields. The wide use of shaving board reduces the consumption of natural materials and improves the overall value of wood. However, the existing shaving board has no antibacterial property, which limits the use of shaving board. SUMMARY

[0003] The present application relates to the technical field of shaving board preparation, and particularly relates to a preparation process of antibacterial veneered shaving board.

[0004] The purpose of the present application can be achieved by the following technical solutions:

[0005] A preparation process of antibacterial veneered shaving board, specifically comprising the following steps:

[0006] The modifier, methyl methacrylate, butyl acrylate and acrylamide are mixed uniformly to prepare a monomer suspension. The emulsifier OP-10, sodium dodecyl benzene sulfonate and deionized water are mixed, and the monomer suspension is stirred and added under the conditions of a rotation speed of 300-500 r / min and a temperature of 20-25 DEG C. After stirring for 30-40 min, the temperature is raised to 75-80 DEG C, and potassium persulfate is added for reaction for 6-8 h to prepare a modified emulsion. The shaving and the modified emulsion are mixed uniformly, and then added to a mold. The shaving board is prepared by hot pressing at a temperature of 100-110 DEG C for 15-20 min.

[0007] Further, the amount ratio of the modifier, methyl methacrylate, butyl acrylate and acrylamide is 3:13.28:7.55:2.68, the amount ratio of the emulsifier OP-10, sodium dodecyl benzene sulfonate, deionized water and monomer suspension is 1.2 g:0.5 g:100 mL:26.51 g, and the amount of potassium persulfate is 0.1-0.3% of the mass fraction of the monomer suspension. The mass ratio of the shaving and the modified emulsion is 2:1.

[0008] Further, the modifier is made by the following steps:

[0009] Step A1: uniformly mix tetrabutyl titanate, acetic acid and n-propanol to obtain a mixed solution, disperse the modified chitosan in deionized water, stir and add the mixed solution under the conditions of a rotation speed of 60-120 r / min and a temperature of 145-150℃, react for 8-10 h, and prepare a modified matrix;

[0010] Step A2: disperse the modified matrix in ethanol, stir and add KH570 under the conditions of a rotation speed of 200-300 r / min and a temperature of 40-50℃, after stirring for 30-40 min, warm to 80-85℃, reflux for 20-25 h, cool to room temperature and filter, wash the substrate to neutral, and prepare the modifier.

[0011] Further, the volume ratio of tetrabutyl titanate, acetic acid and n-propanol in step A1 is 1:1:7, and the usage ratio of modified chitosan, deionized water and the mixed solution is 1 g:7 mL:9 mL.

[0012] Further, the usage ratio of the modified matrix, ethanol and KH570 in step A2 is 2 g:50 mL:0.05 g.

[0013] Further, the modified chitosan is made by the following steps:

[0014] Step B1: mix mercaptoglycerol and acryloyl chloride, react under the conditions of a rotation speed of 120-150 r / min and 365 nm ultraviolet light irradiation for 1-1.5 h to prepare intermediate 1, uniformly mix intermediate 1, epichlorohydrin, benzyltriethylammonium chloride and DMF, protect by nitrogen, react under the conditions of a rotation speed of 150-200 r / min and a temperature of 100-105℃ for 2-4 h, cool to 70-75℃, add sodium hydroxide solution, and continue to react for 15-20 h to prepare intermediate 2;

[0015] Step B2: dissolve 11-bromo-1-alcohol in chloroform, add sodium bicarbonate and hydroquinone, stir and add intermediate 2 under the conditions of a rotation speed of 150-200 r / min and a temperature of 55-65℃, react for 7-9 h to prepare intermediate 3, mix intermediate 3, dimethyl ethylamine, hydroquinone and acetonitrile, react under the conditions of a rotation speed of 60-80 r / min and a temperature of 48-53℃ for 20-25 h to prepare the crosslinking agent;

[0016] Step B3: chitosan was dissolved in glacial acetic acid to obtain a dropping solution, sodium hydroxide was dissolved in deionized water, and the dropping solution was added under the conditions of a rotation speed of 120-150 r / min and a temperature of 70-80℃, and after the dropping was completed, the filtrate was removed by filtration, the filter cake was washed with deionized water until it was neutral, and chitosan microspheres were obtained, the chitosan microspheres were dispersed in deionized water, a crosslinking agent was added, and the reaction was carried out under the conditions of a rotation speed of 20-50 r / min, a temperature of 45-50℃, and a pH value of 9-10 for 4-6 h, and then the filtrate was removed by filtration, the substrate was washed until it was neutral and dried, and modified chitosan was prepared.

[0017] Further, the molar ratio of the mercapto glycerol and acryloyl chloride in step B1 is 1:1, and the amount ratio of the intermediate 1, epichlorohydrin, benzyl triethyl ammonium chloride and sodium hydroxide solution is 40 mmol:80 mmol:0.27 g:14 g, and the mass fraction of the sodium hydroxide solution is 30%.

[0018] Further, the amount ratio of the 11-bromo-1-alcohol, sodium bicarbonate, hydroquinone and the intermediate 2 in step B2 is 20 mmol:40 mmol:8.36 mg:40 mmol, and the amount ratio of the intermediate 3, dimethyl ethylamine, hydroquinone and acetonitrile is 6.3 mmol:25 mmol:3.8 mg:5 mL.

[0019] Further, the amount ratio of the chitosan and glacial acetic acid in step B3 is 1 g:25 mL, the mass fraction of the glacial acetic acid is 2%, the amount ratio of the sodium hydroxide, deionized water and the dropping solution is 4 g:100 mL:5 mL, and the amount ratio of the chitosan microspheres, deionized water and the crosslinking agent is 1 g:50 mL:1 g.

[0020] The beneficial effects of the present application: the antibacterial veneered particle board disclosed in the present application, by polymerizing and emulsifying the modifier, methyl methacrylate, butyl acrylate and acrylamide to obtain a modified emulsion, then mixing the shavings with the modified emulsion and hot pressing to form, the modifier uses tetrabutyl titanate as raw material, loads nano titanium dioxide on the surface of modified chitosan to prepare a modified matrix, and the modified matrix is surface treated with KH570 to graft active double bonds on the surface of the modified matrix to prepare the modifier, the active double bonds on the surface of the modifier can participate in polymerization, increase the cooperation of the modifier and the organic molecular chain, and ensure the antibacterial durability of the antibacterial veneered particle board, the modified chitosan uses mercaptoglycerol and acryloyl chloride as raw materials, under light conditions, the mercapto group on the mercaptoglycerol reacts with the double bond on the acryloyl chloride to prepare an intermediate 1, the intermediate 1 and epichlorohydrin are reacted, the hydroxyl group on the intermediate 1 and the ring-opening reaction of epichlorohydrin, and then the ring is closed under the action of sodium hydroxide to form a new epoxy group to prepare an intermediate 2, the 11-bromo-1-alcohol and the intermediate 2 are reacted, the alcohol hydroxyl group on the 11-bromo-1-alcohol and the acyl chloride on the intermediate 2 are reacted, the intermediate 3 is prepared, the intermediate 3 and dimethyl ethylamine are reacted to form a quaternary ammonium salt structure to prepare a crosslinking agent, the chitosan is first dissolved, then converted into a spherical shape in a sodium hydroxide solution, and finally crosslinked with the crosslinking agent to form a crosslinked chitosan containing a long-chain quaternary ammonium salt structure, the organic antibacterial and inorganic antibacterial are combined, when bacteria contact the veneered particle board, the bacteria can be quickly adsorbed and the bacterial cell membrane can be destroyed, so that the protein inside the bacterial cell is leaked to achieve the effect of killing the bacteria, and the surface titanium dioxide is irradiated, the electrons can be excited from the valence band to the conduction band, and the corresponding holes are generated in the valence band, under the action of the electric field, the electrons and holes are separated and migrate to different positions on the surface to react, and the generated superoxide anion free radicals can react with the organic matter in the bacteria to kill the bacteria, compared with the traditional organic antibacterial agent, there is no precipitation, and the antibacterial effect is ensured to be persistent. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described below. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application. Embodiment 1

[0022] A preparation process of an antibacterial veneered particle board, specifically comprising the following steps:

[0023] The modifier, methyl methacrylate, butyl acrylate and acrylamide are mixed uniformly to prepare a monomer suspension, the emulsifier OP-10, sodium dodecyl benzene sulfonate and deionized water are mixed, under the condition that the rotating speed is 300 r / min and the temperature is 20℃, the monomer suspension is stirred and added, after stirring for 30 min, the temperature is raised to 75℃, potassium persulfate is added to react for 6 h to prepare a modified emulsion, the shavings are mixed uniformly with the modified emulsion and then added into a mold, under the condition that the temperature is 100℃, hot pressing is carried out for 15 min to prepare an antibacterial decorative shaving board.

[0024] The amount ratio of the modifier, methyl methacrylate, butyl acrylate and acrylamide is 3:13.28:7.55:2.68, the amount ratio of the emulsifier OP-10, sodium dodecyl benzene sulfonate, deionized water and the monomer suspension is 1.2 g:0.5 g:100 mL:26.51 g, the amount of potassium persulfate is 0.1% of the mass fraction of the monomer suspension, and the mass ratio of the shavings and the modified emulsion is 2:1.

[0025] The modifier is prepared by the following steps:

[0026] Step A1: the tetrabutyl titanate, acetic acid and n-propanol are mixed uniformly to obtain a mixed solution, the modified chitosan is dispersed in deionized water, under the condition that the rotating speed is 60 r / min and the temperature is 145℃, the mixed solution is stirred and added, reaction is carried out for 8 h to prepare a modified matrix;

[0027] Step A2: the modified matrix is dispersed in ethanol, under the condition that the rotating speed is 200 r / min and the temperature is 40℃, KH570 is stirred and added, after stirring for 30 min, the temperature is raised to 80℃, reflux is carried out for 20 h, the temperature is lowered to room temperature and filtration is carried out, the substrate is washed to neutral to prepare the modifier.

[0028] The volume ratio of the tetrabutyl titanate, acetic acid and n-propanol in step A1 is 1:1:7, and the amount ratio of the modified chitosan, deionized water and the mixed solution is 1 g:7 mL:9 mL.

[0029] The amount ratio of the modified matrix, ethanol and KH570 in step A2 is 2 g:50 mL:0.05 g.

[0030] The modified chitosan is prepared by the following steps:

[0031] Step B1: the intermediate 1 was prepared by mixing the mercaptan glycerol and acryloyl chloride under the condition of 120 r / min rotation speed and 365 nm ultraviolet light irradiation for 1 h, and then mixing the intermediate 1, epichlorohydrin, benzyl triethyl ammonium chloride and DMF uniformly, and then performing reaction under the condition of 150 r / min rotation speed and 100 DEG C for 2 h, and then cooling to 70 DEG C, and then adding sodium hydroxide solution, and then continuing to perform reaction for 15 h;

[0032] Step B2: the intermediate 3 was prepared by dissolving the 11-bromo-1-alcohol in chloroform, and then adding sodium bicarbonate and hydroquinone under the condition of 150 r / min rotation speed and 55 DEG C, and then stirring and adding the intermediate 2, and then performing reaction for 7 h, and then mixing the intermediate 3, dimethyl ethyl amine, hydroquinone and acetonitrile under the condition of 60 r / min rotation speed and 48 DEG C, and then performing reaction for 20 h.

[0033] Step B3: the intermediate 3 was prepared by dissolving the 11-bromo-1-alcohol in chloroform, and then adding sodium bicarbonate and hydroquinone under the condition of 150 r / min rotation speed and 55 DEG C, and then stirring and adding the intermediate 2, and then performing reaction for 7 h, and then mixing the intermediate 3, dimethyl ethyl amine, hydroquinone and acetonitrile under the condition of 60 r / min rotation speed and 48 DEG C, and then performing reaction for 20 h.

[0034] The molar ratio of the mercaptan glycerol and acryloyl chloride in step B1 is 1:1, and the dosage ratio of the intermediate 1, epichlorohydrin, benzyl triethyl ammonium chloride and sodium hydroxide solution is 40 mmol:80 mmol:0.27 g:14 g, and the mass fraction of the sodium hydroxide solution is 30%.

[0035] The dosage ratio of the 11-bromo-1-alcohol, sodium bicarbonate, hydroquinone and the intermediate 2 in step B2 is 20 mmol:40 mmol:8.36 mg:40 mmol, and the dosage ratio of the intermediate 3, dimethyl ethyl amine, hydroquinone and acetonitrile is 6.3 mmol:25 mmol:3.8 mg:5 mL.

[0036] The dosage ratio of the chitosan and glacial acetic acid in step B3 is 1 g:25 mL, the mass fraction of the glacial acetic acid is 2%, the dosage ratio of the sodium hydroxide, deionized water and the dropping solution is 4 g:100 mL:5 mL, and the dosage ratio of the chitosan microspheres, deionized water and the crosslinking agent is 1 g:50 mL:1 g. Example 2

[0037] A preparation process of an antibacterial veneered particle board, specifically comprising the following steps:

[0038] The modifier, methyl methacrylate, butyl acrylate and acrylamide are mixed uniformly to prepare a monomer suspension, the emulsifier OP-10, sodium dodecyl benzene sulfonate and deionized water are mixed, stirring is carried out at a rotation speed of 300 r / min and a temperature of 25℃, and the monomer suspension is added, after stirring for 35 min, the temperature is raised to 78℃, and potassium persulfate is added to react for 7 h, to prepare a modified emulsion, the shavings are mixed uniformly with the modified emulsion, and then added into a mold, and hot pressing is carried out at a temperature of 105℃ for 18 min, to prepare an antibacterial decorative shaving board.

[0039] The amount ratio of the modifier, methyl methacrylate, butyl acrylate and acrylamide is 3:13.28:7.55:2.68, the amount ratio of the emulsifier OP-10, sodium dodecyl benzene sulfonate, deionized water and the monomer suspension is 1.2 g:0.5 g:100 mL:26.51 g, the amount of potassium persulfate is 0.2% of the mass fraction of the monomer suspension, and the mass ratio of the shavings and the modified emulsion is 2:1.

[0040] The modifier is prepared by the following steps:

[0041] Step A1: the tetrabutyl titanate, acetic acid and n-propanol are mixed uniformly to obtain a mixed solution, the modified chitosan is dispersed in deionized water, stirring is carried out at a rotation speed of 60 r / min and a temperature of 148℃, and the mixed solution is added, to react for 9 h, to prepare a modified matrix;

[0042] Step A2: the modified matrix is dispersed in ethanol, stirring is carried out at a rotation speed of 200 r / min and a temperature of 45℃, and KH570 is added, after stirring for 35 min, the temperature is raised to 83℃, and refluxing is carried out for 23 h, to reduce the temperature to room temperature and filter, the substrate is washed to neutral, to prepare the modifier.

[0043] The volume ratio of the tetrabutyl titanate, acetic acid and n-propanol in step A1 is 1:1:7, and the amount ratio of the modified chitosan, deionized water and the mixed solution is 1 g:7 mL:9 mL.

[0044] The amount ratio of the modified matrix, ethanol and KH570 in step A2 is 2 g:50 mL:0.05 g.

[0045] The modified chitosan is prepared by the following steps:

[0046] Step B1: thiol glycerol and acryloyl chloride were mixed, and under the condition of 120 r / min rotation speed and 365 nm ultraviolet light irradiation, the reaction was carried out for 1.5 h to obtain intermediate 1; intermediate 1, epichlorohydrin, benzyl triethyl ammonium chloride and DMF were uniformly mixed, nitrogen was introduced for protection, and under the condition of 150 r / min rotation speed and 103℃, the reaction was carried out for 3 h; after being cooled to 73℃, sodium hydroxide solution was added, and the reaction was continued for 15-20 h to obtain intermediate 2;

[0047] Step B2: 11-bromo-1-alcohol was dissolved in chloroform, sodium bicarbonate and hydroquinone were added, and under the condition of 150 r / min rotation speed and 60℃, intermediate 2 was added and stirred to carry out the reaction for 8 h to obtain intermediate 3; intermediate 3, dimethyl ethylamine, hydroquinone and acetonitrile were mixed, and under the condition of 80 r / min rotation speed and 50℃, the reaction was carried out for 23 h to obtain a crosslinking agent;

[0048] Step B3: chitosan was dissolved in glacial acetic acid to obtain a dropping solution; sodium hydroxide was dissolved in deionized water, and under the condition of 120 r / min rotation speed and 75℃, the dropping solution was added and stirred; after the dropping was completed, the filtrate was removed by filtration, the filter cake was washed with deionized water until it was neutral, and chitosan microspheres were obtained; the chitosan microspheres were dispersed in deionized water, and the crosslinking agent was added; under the condition of 50 r / min rotation speed, 48℃, and pH 9, the reaction was carried out for 5 h; the filtrate was removed by filtration, the substrate was washed until it was neutral, and was dried to obtain modified chitosan.

[0049] The molar ratio of thiol glycerol and acryloyl chloride in step B1 was 1:1, and the amount ratio of intermediate 1, epichlorohydrin, benzyl triethyl ammonium chloride and sodium hydroxide solution was 40 mmol:80 mmol:0.27 g:14 g, and the mass fraction of sodium hydroxide solution was 30%.

[0050] The amount ratio of 11-bromo-1-alcohol, sodium bicarbonate, hydroquinone and intermediate 2 in step B2 was 20 mmol:40 mmol:8.36 mg:40 mmol, and the amount ratio of intermediate 3, dimethyl ethylamine, hydroquinone and acetonitrile was 6.3 mmol:25 mmol:3.8 mg:5 mL.

[0051] The amount ratio of chitosan and glacial acetic acid in step B3 was 1 g:25 mL, the mass fraction of glacial acetic acid was 2%, the amount ratio of sodium hydroxide, deionized water and dropping solution was 4 g:100 mL:5 mL, and the amount ratio of chitosan microspheres, deionized water and crosslinking agent was 1 g:50 mL:1 g. Example 3

[0052] A preparation process of an antibacterial veneered particle board, specifically comprising the following steps:

[0053] The modifier, methyl methacrylate, butyl acrylate and acrylamide are mixed uniformly to prepare a monomer suspension, the emulsifier OP-10, sodium dodecyl benzene sulfonate and deionized water are mixed, stirring is carried out at a rotation speed of 500 r / min and a temperature of 25℃, and the monomer suspension is added, after stirring for 40 min, the temperature is raised to 80℃, and potassium persulfate is added to react for 8 h to prepare a modified emulsion, the shavings are mixed uniformly with the modified emulsion, and then added into a mold, and hot pressing is carried out at a temperature of 110℃ for 20 min to prepare an antibacterial decorative shaving board.

[0054] The amount ratio of the modifier, methyl methacrylate, butyl acrylate and acrylamide is 3:13.28:7.55:2.68, the amount ratio of the emulsifier OP-10, sodium dodecyl benzene sulfonate, deionized water and the monomer suspension is 1.2 g:0.5 g:100 mL:26.51 g, the amount of potassium persulfate is 0.3% of the mass fraction of the monomer suspension, and the mass ratio of the shavings and the modified emulsion is 2:1.

[0055] The modifier is prepared by the following steps:

[0056] Step A1: The tetrabutyl titanate, acetic acid and n-propanol are mixed uniformly to obtain a mixed solution, the modified chitosan is dispersed in deionized water, stirring is carried out at a rotation speed of 120 r / min and a temperature of 150℃, and the mixed solution is added to react for 10 h to prepare a modified matrix;

[0057] Step A2: The modified matrix is dispersed in ethanol, stirring is carried out at a rotation speed of 300 r / min and a temperature of 50℃, and KH570 is added, after stirring for 40 min, the temperature is raised to 85℃, reflux is carried out for 25 h, the temperature is lowered to room temperature and filtration is carried out, and the substrate is washed to neutral to prepare the modifier.

[0058] The volume ratio of the tetrabutyl titanate, acetic acid and n-propanol in step A1 is 1:1:7, and the amount ratio of the modified chitosan, deionized water and the mixed solution is 1 g:7 mL:9 mL.

[0059] The amount ratio of the modified matrix, ethanol and KH570 in step A2 is 2 g:50 mL:0.05 g.

[0060] The modified chitosan is prepared by the following steps:

[0061] Step B1: thiol glycerol and acryloyl chloride were mixed, and reacted under the condition of 150 r / min rotation speed, 365 nm ultraviolet light irradiation for 1.5 h to prepare intermediate 1; intermediate 1, epichlorohydrin, benzyl triethyl ammonium chloride and DMF were uniformly mixed, and protected by nitrogen; and reacted under the condition of 200 r / min rotation speed and 105℃ for 4 h; then cooled to 75℃, and added with sodium hydroxide solution, and continued to react for 20 h to prepare intermediate 2;

[0062] Step B2: 11-bromo-1-alcohol was dissolved in chloroform, and added with sodium bicarbonate and hydroquinone; and stirred under the condition of 200 r / min rotation speed and 65℃ for 9 h, and added with intermediate 2 to react to prepare intermediate 3; intermediate 3, dimethyl ethylamine, hydroquinone and acetonitrile were mixed, and reacted under the condition of 80 r / min rotation speed and 53℃ for 25 h to prepare the crosslinking agent.

[0063] Step B3: chitosan was dissolved in glacial acetic acid to prepare a dropping solution; and sodium hydroxide was dissolved in deionized water, and stirred under the condition of 150 r / min rotation speed and 80℃, and added with the dropping solution; after the dropping was completed, the filtrate was removed by filtration, and the filter cake was washed with deionized water until neutral to obtain chitosan microspheres; the chitosan microspheres were dispersed in deionized water, and added with the crosslinking agent; and reacted under the condition of 50 r / min rotation speed, 50℃, pH 10 for 6 h, and then the filtrate was removed by filtration, and the substrate was washed until neutral and dried to prepare the modified chitosan.

[0064] The molar ratio of thiol glycerol and acryloyl chloride in step B1 was 1:1; the amount ratio of intermediate 1, epichlorohydrin, benzyl triethyl ammonium chloride and sodium hydroxide solution was 40 mmol:80 mmol:0.27 g:14 g; and the mass fraction of sodium hydroxide solution was 30%.

[0065] The amount ratio of 11-bromo-1-alcohol, sodium bicarbonate, hydroquinone and intermediate 2 in step B2 was 20 mmol:40 mmol:8.36 mg:40 mmol; and the amount ratio of intermediate 3, dimethyl ethylamine, hydroquinone and acetonitrile was 6.3 mmol:25 mmol:3.8 mg:5 mL.

[0066] The amount ratio of chitosan and glacial acetic acid in step B3 was 1 g:25 mL; the mass fraction of glacial acetic acid was 2%; the amount ratio of sodium hydroxide, deionized water and dropping solution was 4 g:100 mL:5 mL; and the amount ratio of chitosan microspheres, deionized water and crosslinking agent was 1 g:50 mL:1 g.

[0067] Comparative Example 1

[0068] The comparative example is compared with example 1, and a modified base is used instead of a modifier, and the remaining steps are the same.

[0069] Comparative example 2

[0070] The comparative example is compared with example 1, and chitosan is used instead of modified chitosan, and the remaining steps are the same.

[0071] Comparative example 3

[0072] The comparative example is compared with example 1, and ethylene glycol glycidyl ether is used instead of a modifier, and the remaining steps are the same.

[0073] 10 7 CFU / mL of S. aureus and E. coli bacterial solution was applied to the surface of the decorative chipboard, and a layer of sterile PE film was covered, and after 1 h, the decorative chipboard was rinsed with phosphate buffer, the rinse was applied to the culture medium, and cultured for 24 h, the number of bacteria was counted, the antibacterial rate was calculated, and according to the standard of GB / T17657-2013, the decorative chipboard was made into a sample of 50mmx50mm to detect the number of openings, and the test results are shown in the following table.

[0074]

[0075] From the above table, it can be seen that the present application has good antibacterial effect and internal bonding strength.

[0076] The above content is only an example and description of the concept of the present application, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the concept of the present application or exceed the scope defined by the present claims, and should belong to the protection scope of the present application.

Claims

1. A process for the production of an antibacterial veneered particle board, characterized by: Specifically comprising the following steps: The modifier, methyl methacrylate, butyl acrylate and acrylamide are mixed uniformly to prepare a monomer suspension, the emulsifier OP-10, sodium dodecyl benzene sulfonate and deionized water are mixed, stirred and added into the monomer suspension, after stirring treatment, heating and adding potassium persulfate for reaction, a modified emulsion is prepared, the shavings are mixed uniformly in the modified emulsion and then added into a mold for hot pressing treatment to prepare the antibacterial veneered shaving board; The modifier is prepared by the following steps: Step A1: the tetrabutyl titanate, acetic acid and n-propanol are mixed uniformly to obtain a mixed solution, the modified chitosan is dispersed in deionized water, stirred and added into the mixed solution for reaction to prepare a modified matrix; Step A2: the modified matrix is dispersed in ethanol, stirred and added into KH570, after stirring treatment, heating and refluxing, cooling to room temperature and filtering, the substrate is washed to neutral to prepare the modifier; The modified chitosan is prepared by the following steps: Step B1: the mercapto glycerol and acryloyl chloride are mixed and reacted to prepare intermediate 1, the intermediate 1, epichlorohydrin, benzyl triethyl ammonium chloride and DMF are mixed and reacted, the temperature is lowered and sodium hydroxide solution is added, the reaction is continued to prepare intermediate 2; Step B2: the 11-bromo-1-alcohol is dissolved in chloroform, sodium bicarbonate and hydroquinone are added, stirred and added into the intermediate 2 for reaction to prepare intermediate 3, the intermediate 3, dimethyl ethylamine, hydroquinone and acetonitrile are mixed for reaction to prepare a crosslinking agent; Step B3: the chitosan is dissolved in glacial acetic acid to obtain a dropping solution, sodium hydroxide is dissolved in deionized water, stirred and added into the dropping solution, after dropping is completed, the filtrate is removed by filtering, the filter cake is washed to neutral with deionized water to obtain chitosan microspheres, the chitosan microspheres are dispersed in deionized water, the crosslinking agent is added, after reaction, the filtrate is removed by filtering, the substrate is washed to neutral and dried to prepare the modified chitosan.

2. A process for the preparation of an antibacterial overlay particle board according to claim 1, characterized in that: The use amount ratio of the modifier, methyl methacrylate, butyl acrylate and acrylamide is 3:13.28:7.55:2.68, the use amount ratio of the emulsifier OP-10, sodium dodecyl benzene sulfonate, deionized water and the monomer suspension is 1.2g:0.5g:100mL:26.51g, the use amount of potassium persulfate is 0.1-0.3% of the mass fraction of the monomer suspension, and the mass ratio of the shavings and the modified emulsion is 2:

1.

3. A process for the preparation of an antibacterial overlay particle board according to claim 1, characterized in that: The volume ratio of the tetrabutyl titanate, acetic acid and n-propanol in step A1 is 1:1:7, and the use amount ratio of the modified chitosan, deionized water and the mixed solution is 1g:7mL:9mL.

4. The process for preparing an antibacterial overlay particle board according to claim 1, characterized in that: The use amount ratio of the modified matrix, ethanol and KH570 in step A2 is 2g:50mL:0.05g.

5. The process of claim 1, wherein: The molar ratio of the mercapto glycerol and acryloyl chloride in step B1 is 1:1, and the use amount ratio of the intermediate 1, epichlorohydrin, benzyl triethyl ammonium chloride and sodium hydroxide solution is 40mmol:80mmol:0.27g:14g.

6. The process of claim 1, wherein: The 11-bromo-1-ol, sodium bicarbonate, hydroquinone and intermediate 2 were used in a ratio of 20 mmol:40 mmol:8.36 mg:40 mmol, and intermediate 3, dimethyl ethylamine, hydroquinone and acetonitrile were used in a ratio of 6.3 mmol:25 mmol:3.8 mg:5 mL.

7. The process of claim 1, wherein: The chitosan and glacial acetic acid were used in a ratio of 1 g:25 mL, the sodium hydroxide, deionized water and dropwise liquid were used in a ratio of 4 g:100 mL:5 mL, and the chitosan microspheres, deionized water and crosslinking agent were used in a ratio of 1 g:50 mL:1 g.

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