OSB boards modified with bioactive ingredients and manufacturing process

Abstract

This invention provides an OSB board modified with bioactive ingredients and its production process. The production process includes preparing titanium dioxide molecular nests, preparing a solution containing bioactive ingredients, loading, impregnation, and molding. The loading process involves mixing the solution containing bioactive ingredients with porous titanium dioxide molecular nests and ball milling them at a ball-to-material ratio of 2-6:1, a ball milling speed of 50-54 rpm, a ball milling time of 17-23 min, and a ball milling temperature of 35-39°C. Then, palmitic acid, fatty alcohol polyoxyethylene ether, white oil, and sodium dodecylbenzene sulfonate are added, and the mixture is ball milled again at a ball milling speed of 142-151 rpm, a ball milling time of 21-27 min, and a ball milling temperature of 10-14°C. After the process, the mixture is dried to obtain the functional agent. The OSB board prepared by this invention exhibits good antibacterial and antifungal properties, maintaining excellent antibacterial and antifungal performance even in high-temperature, humid environments and environments with a moisture content of up to 30%.

Description

Technical Field

[0001] This invention belongs to the field of OSB board technology, specifically relating to an OSB board modified with bioactive ingredients and its production process. Background Technology

[0002] OSB board is a type of synthetic wood. OSB, also known as Oriented Strand Board, is a new type of board that originated in Europe and rapidly developed internationally in the 1970s and 1980s.

[0003] OSB has seen unprecedented development in the application of furniture. Many large furniture companies have started to use OSB to make furniture. The reason why it is so popular with consumers is that it releases no formaldehyde, is sturdy and durable, and is lighter and has better flatness than furniture made of medium density fiberboard.

[0004] However, furniture made from OSB boards using existing technology has poor antibacterial and anti-mildew properties, especially in humid environments where it can breed a large number of bacteria and mold, seriously affecting its performance.

[0005] Therefore, providing an OSB board modified with bioactive ingredients and its production process, which has excellent antibacterial and antifungal properties and can maintain excellent antifungal and antibacterial properties even in humid environments, is a technical problem that the existing technology can solve. Summary of the Invention

[0006] To address the technical problems existing in the prior art, this invention provides an OSB board modified with active ingredients and a production process to improve its antibacterial and antifungal properties, ensuring excellent antifungal and antibacterial properties even in humid environments.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] 1. Preparation of porous titanium dioxide molecular nests

[0009] (1) Preparation of modified precursor solution

[0010] F127, deionized water, formic acid, and hydrochloric acid were added sequentially to tetrahydrofuran and stirred for 8-12 minutes at a stirring speed of 85-89 rpm. After stirring, a modifier was added and ultrasonic oscillation was performed for 15-19 minutes at a power of 452-468 W and a frequency of 45-51 kHz. After ultrasonic oscillation, TBOT was added dropwise while stirring at a speed of 930-954 rpm for 33-37 minutes. The modified precursor solution was obtained after stirring.

[0011] The mass ratio of tetrahydrofuran, deionized water, formic acid, hydrochloric acid, and modifier is 26-28:13-15:4.5-4.9:3.0-3.4:0.4-0.6;

[0012] The modifier is composed of activated alumina, silica aerogel, guar gum, carboxymethyl cellulose, and polyvinylpyrrolidone, wherein the mass ratio of activated alumina, silica aerogel, guar gum, carboxymethyl cellulose, and polyvinylpyrrolidone is 6-8:11-13:2.3-2.5:3.4-3.6:2.9-3.1.

[0013] The method for preparing activated alumina is as follows: Alumina is placed in a high-temperature sealed container for sealing treatment. The sealing treatment temperature is 134-146℃, the sealing treatment time is 26-28min, and the sealing treatment pressure is 3.2-3.6MPa. After the sealing treatment is completed, glycerol, tartaric acid and pentaerythritol are added and stirred evenly to obtain activated alumina.

[0014] The alumina has a particle size of 135-145 nm.

[0015] The mass ratio of alumina, glycerol, tartaric acid, and pentaerythritol is 25-29:2.4-2.8:1.7-1.9:2.2-2.4.

[0016] (2) Solvent evaporation

[0017] The modified precursor solution was volatilized at 38-42℃ and 68-72℃ for 3.8-4.2h and 11.7-12.3h, respectively, to obtain a solid.

[0018] (3) Calcination

[0019] The solid was calcined in a tube furnace under N2 atmosphere at a temperature of 330-342℃ for 2.1-2.3 hours, and then calcined in an electric resistance furnace under air atmosphere for 2.3-2.7 hours at a temperature of 368-373℃ to obtain a preliminary titanium dioxide molecular nest.

[0020] (4) Post-processing

[0021] The preliminary titanium dioxide molecular nests were placed in a vacuum freeze dryer, and the vacuum degree was controlled at 143-151 Pa, the cold trap temperature was -34 to -30℃, and the time was 40-50 min. After the vacuum freeze drying process, porous titanium dioxide molecular nests were obtained.

[0022] 2. Preparation of solutions containing bioactive components

[0023] The bioactive ingredients were mixed with anhydrous ethanol, and then sodium alginate and xylitol were added. After mixing evenly, a solution containing the bioactive ingredients was obtained.

[0024] The bioactive ingredient is one of lavender extract, peppermint extract and artemisia extract;

[0025] The particle size of the bioactive ingredient is 37-43 nm;

[0026] The mass ratio of the bioactive component, anhydrous ethanol, sodium alginate and xylitol is 35-39:96-105:3.2-3.6:3.8-4.2.

[0027] 3. Load

[0028] A solution containing bioactive components is mixed with porous titanium dioxide molecular nests and subjected to a first ball milling process. The ball-to-material ratio is controlled at 2-6:1, the ball milling speed is 50-54 rpm, the ball milling time is 17-23 min, and the ball milling temperature is 35-39℃. After the first ball milling process, palmitic acid, fatty alcohol polyoxyethylene ether, white oil, and sodium dodecylbenzene sulfonate are added for a second ball milling process. The ball-to-material ratio is controlled at 6-10:1, the ball milling speed is 142-151 rpm, the ball milling time is 21-27 min, and the ball milling temperature is 10-14℃. After the second ball milling process, the functional agent is obtained after drying.

[0029] The mass ratio of the solution containing bioactive ingredients, porous titanium dioxide molecular nests, palmitic acid, fatty alcohol polyoxyethylene ether, white oil, and sodium dodecylbenzenesulfonate is 84-96:8.9-9.5:1.1-1.3:0.8-1.2:0.3-0.5:2.0-2.6.

[0030] 4. Soaking

[0031] Plain paper is immersed in a primary treatment solution for 21-23 minutes, then immersed in a secondary treatment solution for 20-25 minutes. After immersion, it is subjected to ultraviolet-microwave treatment for 6-8 minutes, with an ultraviolet wavelength of 264-276 nm, a microwave power of 310-330 W, and a microwave frequency of 29-33 kHz. After the ultraviolet-microwave treatment, it is dried to obtain functional paper.

[0032] The mass ratio of the plain base paper, the primary treatment solution, and the secondary treatment solution is 1:2.8-3.0:3.1-3.5;

[0033] The primary treatment solution is composed of deionized water, melamine gum, functional agent, gum arabic, ethyl cellulose, and sodium citrate, wherein the mass ratio of deionized water, melamine gum, functional agent, gum arabic, ethyl cellulose, and sodium citrate is 72-76:25-28:12-14:3.0-3.4:1.5-1.7:0.9-1.1.

[0034] The secondary treatment solution is composed of deionized water, PMDI gum, functional agent, xanthan gum, calcium oxide and castor oil, and the mass ratio of deionized water, PMDI gum, functional agent, xanthan gum, calcium oxide and castor oil is 60-64:2.5-2.8:7-9:2.7-2.9:2.2-2.4:1.4-1.8.

[0035] 5. Molding

[0036] Functional paper is pasted onto OSB substrate, and then subjected to processes such as pressing, surface finishing, sanding, and drying to obtain OSB substrate modified with bioactive ingredients.

[0037] Compared with the prior art, the present invention achieves the following beneficial effects:

[0038] 1. The OSB board modified with bioactive components obtained by this invention has excellent anti-mildew and mildew properties, with a mildew resistance rating of 0. The inhibition rate against Staphylococcus aureus is 98.3-99.4%, against Escherichia coli is 97.6-98.4%, and against Candida albicans is 97.9-98.8%.

[0039] 2. The OSB board modified with bioactive components obtained by this invention, when placed in an environment with a temperature of 45℃ and a humidity of 70% for 15 days, still maintains a mildew resistance level of 0; the inhibition rate against Staphylococcus aureus is 95.5-98.2%, against Escherichia coli is 92.9-95.4%, and against Candida albicans is 94.4-96.8%.

[0040] 3. Spray deionized water onto the OSB board modified with bioactive components obtained in this invention, and let it stand for 15 days while maintaining the product's moisture content at 30%. The anti-mildew level remains at 0. The inhibition rate against Staphylococcus aureus is 90.6-93.4%, against Escherichia coli is 89.0-91.2%, and against Candida albicans is 91.0-94.5%. Detailed Implementation

[0041] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention are now described.

[0042] Example 1

[0043] 1. Preparation of porous titanium dioxide molecular nests

[0044] (1) Preparation of modified precursor solution

[0045] F127, deionized water, formic acid, and hydrochloric acid were added sequentially to tetrahydrofuran and stirred for 10 min at a stirring speed of 87 rpm. After stirring, a modifier was added and the mixture was subjected to ultrasonic oscillation for 17 min at a power of 460 W and a frequency of 48 kHz. After ultrasonic oscillation, TBOT was added dropwise while stirring at a speed of 942 rpm for 35 min. The modified precursor solution was obtained after stirring.

[0046] The mass ratio of tetrahydrofuran, deionized water, formic acid, hydrochloric acid, and modifier is 27:14:4.7:3.2:0.5.

[0047] The modifier is composed of activated alumina, silica aerogel, guar gum, carboxymethyl cellulose and polyvinylpyrrolidone, wherein the mass ratio of activated alumina, silica aerogel, guar gum, carboxymethyl cellulose and polyvinylpyrrolidone is 7:12:2.4:3.5:3.0.

[0048] The method for preparing activated alumina is as follows: Alumina is placed in a high-temperature sealed container for sealing treatment. The sealing treatment temperature is 140°C, the sealing treatment time is 27 min, and the sealing treatment pressure is 3.4 MPa. After the sealing treatment is completed, glycerol, tartaric acid and pentaerythritol are added and stirred evenly to obtain activated alumina.

[0049] The alumina has a particle size of 140 nm.

[0050] The mass ratio of alumina, glycerol, tartaric acid, and pentaerythritol is 27:2.6:1.8:2.3.

[0051] (2) Solvent evaporation

[0052] The modified precursor solution was volatilized at 40℃ and 70℃ for 4 h and 12 h, respectively, to obtain a solid.

[0053] (3) Calcination

[0054] The solid was calcined in a tube furnace under N2 atmosphere at a temperature of 334℃ for 2.2 hours, and then calcined in an electric resistance furnace under air atmosphere for 2.5 hours at a temperature of 370℃ to obtain a preliminary titanium dioxide molecular nest.

[0055] (4) Post-processing

[0056] The preliminary titanium dioxide molecular nests were placed in a vacuum freeze dryer, and the vacuum degree was controlled at 147 Pa, the cold trap temperature was -32 °C, and the time was 45 min. After the vacuum freeze drying process, porous titanium dioxide molecular nests were obtained.

[0057] 2. Preparation of a solution containing lavender extract

[0058] Lavender extract was mixed with anhydrous ethanol, and then sodium alginate and xylitol were added. After mixing evenly, a solution containing lavender extract was prepared.

[0059] The lavender extract has a particle size of 40 nm.

[0060] The mass ratio of the lavender extract, anhydrous ethanol, sodium alginate and xylitol is 37:100:3.4:4.0.

[0061] 3. Load

[0062] A solution containing lavender extract was mixed with porous titanium dioxide molecular nests and subjected to a first ball milling process. The ball-to-material ratio was controlled at 4:1, the ball milling speed was 52 rpm, the ball milling time was 20 min, and the ball milling temperature was 37℃. After the first ball milling process, palmitic acid, fatty alcohol polyoxyethylene ether, white oil, and sodium dodecylbenzene sulfonate were added for a second ball milling process. The ball-to-material ratio was controlled at 8:1, the ball milling speed was 147 rpm, the ball milling time was 24 min, and the ball milling temperature was 12℃. After the second ball milling process, the functional agent was obtained after drying.

[0063] The mass ratio of the solution containing lavender extract, porous titanium dioxide molecular nests, palmitic acid, fatty alcohol polyoxyethylene ether, white oil, and sodium dodecylbenzenesulfonate is 90:9.2:1.2:1.0:0.4:2.3.

[0064] 4. Soaking

[0065] Plain paper was immersed in a primary treatment solution for 22 minutes, and then immersed in a secondary treatment solution for 23 minutes. After immersion, it was subjected to ultraviolet-microwave treatment for 7 minutes, with an ultraviolet wavelength of 270 nm, a microwave power of 320 W, and a microwave frequency of 31 kHz. Functional paper was obtained after the ultraviolet-microwave treatment.

[0066] The mass ratio of the plain base paper, the primary treatment solution, and the secondary treatment solution is 1:2.9:3.3;

[0067] The primary treatment solution is composed of deionized water, melamine gum, functional agent, gum arabic, ethyl cellulose, and sodium citrate, wherein the mass ratio of deionized water, melamine gum, functional agent, gum arabic, ethyl cellulose, and sodium citrate is 74:26:13:3.2:1.6:1.0.

[0068] The secondary treatment solution is composed of deionized water, PMDI gum, functional agent, xanthan gum, calcium oxide and castor oil, and the mass ratio of deionized water, PMDI gum, functional agent, xanthan gum, calcium oxide and castor oil is 62:2.6:8:2.8:2.3:1.6.

[0069] 5. Molding

[0070] Functional paper is pasted onto OSB substrate, and then subjected to processes such as pressing, surface finishing, sanding, and drying to obtain lavender extract modified OSB board.

[0071] Example 2

[0072] 1. Preparation of porous titanium dioxide molecular nests

[0073] (1) Preparation of modified precursor solution

[0074] F127, deionized water, formic acid, and hydrochloric acid were added sequentially to tetrahydrofuran and stirred for 8 minutes at a stirring speed of 85 rpm. After stirring, a modifier was added and the mixture was subjected to ultrasonic oscillation for 15 minutes at a power of 452 W and a frequency of 45 kHz. After ultrasonic oscillation, TBOT was added dropwise while stirring at a speed of 930 rpm for 33 minutes. The modified precursor solution was obtained after stirring.

[0075] The mass ratio of tetrahydrofuran, deionized water, formic acid, hydrochloric acid, and modifier is 26:13:4.5:3.0:0.4.

[0076] The modifier is composed of activated alumina, silica aerogel, guar gum, carboxymethyl cellulose and polyvinylpyrrolidone, wherein the mass ratio of activated alumina, silica aerogel, guar gum, carboxymethyl cellulose and polyvinylpyrrolidone is 6:11:2.3:3.4:2.9.

[0077] The method for preparing activated alumina is as follows: Alumina is placed in a high-temperature sealed container for sealing treatment. The sealing treatment temperature is 134°C, the sealing treatment time is 26 min, and the sealing treatment pressure is 3.2 MPa. After the sealing treatment is completed, glycerol, tartaric acid and pentaerythritol are added and stirred evenly to obtain activated alumina.

[0078] The alumina has a particle size of 135 nm.

[0079] The mass ratio of alumina, glycerol, tartaric acid, and pentaerythritol is 25:2.4:1.7:2.2.

[0080] (2) Solvent evaporation

[0081] The modified precursor solution was volatilized at 38℃ and 68℃ for 3.8 h and 11.7 h, respectively, to obtain a solid.

[0082] (3) Calcination

[0083] The solid was calcined in a tube furnace under N2 atmosphere at a temperature of 330°C for 2.3 hours, and then calcined in an air atmosphere in a resistance furnace for 2.7 hours at a temperature of 368°C to obtain a preliminary titanium dioxide molecular nest.

[0084] (4) Post-processing

[0085] The preliminary titanium dioxide molecular nests were placed in a vacuum freeze dryer, and the vacuum degree was controlled at 143 Pa, the cold trap temperature at -34 °C, and the time was 40 min. After the vacuum freeze drying process, porous titanium dioxide molecular nests were obtained.

[0086] 2. Preparation of a solution containing peppermint extract

[0087] Peppermint extract was mixed with anhydrous ethanol, and then sodium alginate and xylitol were added. After mixing evenly, a solution containing peppermint extract was prepared.

[0088] The peppermint extract has a particle size of 37 nm.

[0089] The mass ratio of peppermint extract, anhydrous ethanol, sodium alginate and xylitol is 35:96:3.2:3.8.

[0090] 3. Load

[0091] A solution containing peppermint extract was mixed with porous titanium dioxide molecular nests and subjected to a first ball milling process. The ball-to-material ratio was controlled at 2:1, the ball milling speed was 50 rpm, the ball milling time was 17 min, and the ball milling temperature was 35℃. After the first ball milling process, palmitic acid, fatty alcohol polyoxyethylene ether, white oil, and sodium dodecylbenzene sulfonate were added for a second ball milling process. The ball-to-material ratio was controlled at 6:1, the ball milling speed was 142 rpm, the ball milling time was 21 min, and the ball milling temperature was 10℃. After the second ball milling process, the functional agent was obtained after drying.

[0092] The mass ratio of the solution containing peppermint extract, porous titanium dioxide molecular nests, palmitic acid, fatty alcohol polyoxyethylene ether, white oil, and sodium dodecylbenzenesulfonate is 84:8.9:1.1:0.8:0.3:2.0.

[0093] 4. Soaking

[0094] Plain paper was immersed in a primary treatment solution for 21 minutes, and then immersed in a secondary treatment solution for 20 minutes. After immersion, it was subjected to ultraviolet-microwave treatment for 6 minutes, with an ultraviolet wavelength of 264 nm, a microwave power of 310 W, and a microwave frequency of 29 kHz. Functional paper was obtained after the ultraviolet-microwave treatment.

[0095] The mass ratio of the plain base paper, the primary treatment solution, and the secondary treatment solution is 1:2.8:3.1;

[0096] The primary treatment solution is composed of deionized water, melamine gum, functional agent, gum arabic, ethyl cellulose and sodium citrate, wherein the mass ratio of deionized water, melamine gum, functional agent, gum arabic, ethyl cellulose and sodium citrate is 72:25:12:3.0:1.5:0.9.

[0097] The secondary treatment solution is composed of deionized water, PMDI gum, functional agent, xanthan gum, calcium oxide and castor oil, and the mass ratio of deionized water, PMDI gum, functional agent, xanthan gum, calcium oxide and castor oil is 60:2.5:7:2.7:2.2:1.4.

[0098] 5. Molding

[0099] The functional paper is pasted onto the OSB board, and then subjected to pressing, surface finishing, sanding, and drying to obtain the peppermint extract modified OSB board.

[0100] Example 3

[0101] 1. Preparation of porous titanium dioxide molecular nests

[0102] (1) Preparation of modified precursor solution

[0103] F127, deionized water, formic acid, and hydrochloric acid were added sequentially to tetrahydrofuran and stirred for 12 min at a stirring speed of 89 rpm. After stirring, a modifier was added and the mixture was subjected to ultrasonic oscillation for 19 min at a power of 468 W and a frequency of 51 kHz. After ultrasonic oscillation, TBOT was added dropwise while stirring at a speed of 954 rpm for 37 min. The modified precursor solution was obtained after stirring.

[0104] The mass ratio of tetrahydrofuran, deionized water, formic acid, hydrochloric acid, and modifier is 28:15:4.9:3.4:0.6.

[0105] The modifier is composed of activated alumina, silica aerogel, guar gum, carboxymethyl cellulose and polyvinylpyrrolidone, wherein the mass ratio of activated alumina, silica aerogel, guar gum, carboxymethyl cellulose and polyvinylpyrrolidone is 8:13:2.5:3.6:3.1.

[0106] The method for preparing activated alumina is as follows: Alumina is placed in a high-temperature sealed container for sealing treatment. The sealing treatment temperature is 146°C, the sealing treatment time is 28 min, and the sealing treatment pressure is 3.6 MPa. After the sealing treatment is completed, glycerol, tartaric acid and pentaerythritol are added and stirred evenly to obtain activated alumina.

[0107] The alumina has a particle size of 145 nm.

[0108] The mass ratio of alumina, glycerol, tartaric acid, and pentaerythritol is 29:2.8:1.9:2.4.

[0109] (2) Solvent evaporation

[0110] The modified precursor solution was volatilized at 42℃ and 72℃ for 4.2 h and 12.3 h, respectively, to obtain a solid.

[0111] (3) Calcination

[0112] The solid was calcined in a tube furnace under N2 atmosphere at a temperature of 342℃ for 2.1 h, and then calcined in an electric resistance furnace under air atmosphere for 2.3 h at a temperature of 373℃ to obtain a preliminary titanium dioxide molecular nest.

[0113] (4) Post-processing

[0114] The preliminary titanium dioxide molecular nests were placed in a vacuum freeze dryer, and the vacuum degree was controlled at 151 Pa, the cold trap temperature was -30℃, and the time was 50 min. After the vacuum freeze drying process, porous titanium dioxide molecular nests were obtained.

[0115] 2. Preparation of a solution containing Artemisia argyi extract

[0116] Artemisia argyi extract was mixed with anhydrous ethanol, and then sodium alginate and xylitol were added. After mixing evenly, a solution containing Artemisia argyi extract was prepared.

[0117] The Artemisia argyi extract has a particle size of 43 nm.

[0118] The mass ratio of Artemisia argyi extract, anhydrous ethanol, sodium alginate and xylitol is 39:105:3.6:4.2.

[0119] 3. Load

[0120] A solution containing Artemisia argyi extract was mixed with porous titanium dioxide molecular nests and subjected to a first ball milling process. The ball-to-material ratio was controlled at 6:1, the ball milling speed was 54 rpm, the ball milling time was 23 min, and the ball milling temperature was 39℃. After the first ball milling process, palmitic acid, fatty alcohol polyoxyethylene ether, white oil, and sodium dodecylbenzene sulfonate were added for a second ball milling process. The ball-to-material ratio was controlled at 10:1, the ball milling speed was 151 rpm, the ball milling time was 27 min, and the ball milling temperature was 14℃. After the second ball milling process, the functional agent was obtained after drying.

[0121] The mass ratio of the solution containing Artemisia argyi extract, porous titanium dioxide molecular nests, palmitic acid, fatty alcohol polyoxyethylene ether, white oil, and sodium dodecylbenzenesulfonate is 96:9.5:1.3:1.2:0.5:2.6.

[0122] 4. Soaking

[0123] Plain paper was immersed in a primary treatment solution for 23 minutes, and then immersed in a secondary treatment solution for 25 minutes. After immersion, it was subjected to ultraviolet-microwave treatment for 8 minutes, with an ultraviolet wavelength of 276 nm, a microwave power of 330 W, and a microwave frequency of 33 kHz. Functional paper was obtained after the ultraviolet-microwave treatment.

[0124] The mass ratio of the plain base paper, the primary treatment solution, and the secondary treatment solution is 1:3.0:3.5;

[0125] The primary treatment solution is composed of deionized water, melamine gum, functional agent, gum arabic, ethyl cellulose, and sodium citrate, wherein the mass ratio of deionized water, melamine gum, functional agent, gum arabic, ethyl cellulose, and sodium citrate is 76:28:14:3.4:1.7:1.1.

[0126] The secondary treatment solution is composed of deionized water, PMDI gum, functional agent, xanthan gum, calcium oxide and castor oil, and the mass ratio of deionized water, PMDI gum, functional agent, xanthan gum, calcium oxide and castor oil is 64:2.8:9:2.9:2.4:1.8.

[0127] 5. Molding

[0128] Functional paper is pasted onto OSB substrate, and then subjected to pressing, surface finishing, sanding, and drying processes to obtain OSB substrate modified with Artemisia argyi extract.

[0129] Comparative Example 1

[0130] Based on Example 1, the changes are as follows: in the preparation of porous titanium dioxide molecular nests, the modifier component and the post-treatment step are omitted, while the rest of the operations are the same.

[0131] Comparative Example 2

[0132] Based on Example 1, the change is that the two ball milling steps are omitted in the loading step. Instead, the solution containing lavender extract is mixed with porous titanium dioxide molecular nests and dried to obtain the functional agent. The mass ratio of the solution containing lavender extract to the porous titanium dioxide molecular nests is 90:9.2, and the rest of the operations are the same.

[0133] Comparative Example 3

[0134] Based on Example 1, the only change is the impregnation step; all other operations remain the same.

[0135] The impregnation step is changed to immersing the plain paper in the treatment solution for 41-48 minutes, and then drying it to obtain functional paper.

[0136] The mass ratio of the plain-colored base paper to the treatment solution is 1:5.9:6.5;

[0137] The treatment solution is composed of deionized water, melamine adhesive, PMDI adhesive and functional agent, and the mass ratio of deionized water, melamine adhesive, PMDI adhesive and functional agent is 132-140:27.5-30.8:19-23.

[0138] Performance testing

[0139] 1. Antibacterial and antifungal properties

[0140]

[0141] 2. Moisture resistance

[0142] (1) The products obtained in Examples 1-3 and Comparative Examples 1-3 were placed in an environment with a temperature of 45°C and a humidity of 70% for 15 days, and their antibacterial and antifungal properties were tested. The specific results are as follows:

[0143]

[0144] (2) The products prepared in Examples 1-3 and Comparative Examples 1-3 were sprayed with deionized water and left to stand for 15 days while maintaining a moisture content of 30%. The antibacterial and antifungal properties were then tested, and the specific results are as follows:

[0145]

[0146] Unless otherwise specified, all proportions mentioned in this invention are mass proportions, and all percentages are mass percentages.

[0147] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A production process for OSB boards modified with bioactive ingredients, characterized in that, The production process includes the following steps: preparing titanium dioxide molecular nests, preparing a solution containing bioactive components, loading, impregnation, and molding. The preparation of titanium dioxide molecular nests includes the preparation of modified precursor solution, solvent evaporation, calcination and post-treatment steps; The modified precursor solution is prepared by adding F127, deionized water, formic acid and hydrochloric acid sequentially to tetrahydrofuran, stirring for 8-12 min, controlling the stirring speed at 85-89 rpm, adding the modifier after stirring, and performing ultrasonic oscillation treatment for 15-19 min, ultrasonic power at 452-468 W, and ultrasonic frequency at 45-51 kHz. After ultrasonic oscillation, TBOT is added dropwise while stirring at 930-954 rpm for 33-37 min. The modified precursor solution is obtained after stirring. The modifier is composed of activated alumina, silica aerogel, guar gum, carboxymethyl cellulose, and polyvinylpyrrolidone, wherein the mass ratio of activated alumina, silica aerogel, guar gum, carboxymethyl cellulose, and polyvinylpyrrolidone is 6-8:11-13:2.3-2.5:3.4-3.6:2.9-3.

1. The method for preparing activated alumina is as follows: Alumina is placed in a high-temperature sealed container for sealing treatment. The sealing treatment temperature is 134-146℃, the sealing treatment time is 26-28min, and the sealing treatment pressure is 3.2-3.6MPa. After the sealing treatment is completed, glycerol, tartaric acid and pentaerythritol are added and stirred evenly to obtain activated alumina. The modified precursor solution was subjected to solvent evaporation and calcination to obtain preliminary titanium dioxide molecular nests; The calcination step involves placing the solid in a tube furnace under a N2 atmosphere for calcination at a temperature of 330-342°C for 2.1-2.3 hours, and then placing it in an air atmosphere in a resistance furnace for further calcination at a temperature of 368-373°C for 2.3-2.7 hours, thereby obtaining a preliminary titanium dioxide molecular nest. The post-processing step is to place the preliminary titanium dioxide molecular nests in a vacuum freeze dryer, control the vacuum degree to be 143-151 Pa, the cold trap temperature to be -34 to -30°C, and the time to be 40-50 min. After the vacuum freeze drying process is completed, porous titanium dioxide molecular nests are obtained. The step of preparing a solution containing bioactive ingredients is as follows: the bioactive ingredients are mixed with anhydrous ethanol, and then sodium alginate and xylitol are added and mixed evenly to obtain a solution containing bioactive ingredients. The mass ratio of the bioactive component, anhydrous ethanol, sodium alginate, and xylitol is 35-39:96-105:3.2-3.6:3.8-4.

2. The loading step involves mixing a solution containing bioactive components with porous titanium dioxide molecular nests, placing it in a ball mill for a first ball milling treatment, controlling the ball-to-material ratio at 2-6:1, the ball milling speed at 50-54 rpm, the ball milling time at 17-23 min, and the ball milling temperature at 35-39℃. After the first ball milling treatment, palmitic acid, fatty alcohol polyoxyethylene ether, white oil, and sodium dodecylbenzene sulfonate are added for a second ball milling treatment, controlling the ball-to-material ratio at 6-10:1, the ball milling speed at 142-151 rpm, the ball milling time at 21-27 min, and the ball milling temperature at 10-14℃. After the second ball milling is completed, the functional agent is obtained after drying. In the loading step, the mass ratio of the solution containing bioactive ingredients, porous titanium dioxide molecular nests, palmitic acid, fatty alcohol polyoxyethylene ether, white oil, and sodium dodecylbenzenesulfonate is 84-96. 8.9-9.5:1.1-1.3:0.8-1.2:0.3-0.5:2.0-2.6； The impregnation step is as follows: the plain paper is impregnated in a primary treatment solution for 21-23 minutes, then impregnated in a secondary treatment solution for 20-25 minutes. After impregnation, ultraviolet-microwave treatment is performed for 6-8 minutes, with an ultraviolet wavelength of 264-276 nm, a microwave power of 310-330 W, and a microwave frequency of 29-33 kHz. Functional paper is obtained after the ultraviolet-microwave treatment. The primary treatment solution is composed of deionized water, melamine gum, functional agent, gum arabic, ethyl cellulose, and sodium citrate, wherein the mass ratio of deionized water, melamine gum, functional agent, gum arabic, ethyl cellulose, and sodium citrate is 72-76:25-28:12-14:3.0-3.4:1.5-1.7:0.9-1.

1. The secondary treatment solution is composed of deionized water, PMDI gum, functional agent, xanthan gum, calcium oxide and castor oil, and the mass ratio of deionized water, PMDI gum, functional agent, xanthan gum, calcium oxide and castor oil is 60-64:2.5-2.8:7-9:2.7-2.9:2.2-2.4:1.4-1.

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2. The production process of OSB board modified with bioactive ingredients according to claim 1, characterized in that, In the preparation step of the modified precursor solution, the mass ratio of tetrahydrofuran, deionized water, formic acid, hydrochloric acid and modifier is 26-28:13-15:4.5-4.9:3.0-3.4:0.4-0.

6. The alumina has a particle size of 135-145 nm. The mass ratio of alumina, glycerol, tartaric acid, and pentaerythritol is 25-29:2.4-2.8:1.7-1.9:2.2-2.

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3. The production process of OSB board modified with bioactive ingredients according to claim 1, characterized in that, The solvent evaporation step involves evaporating the modified precursor solution at 38-42℃ and 68-72℃ for 3.8-4.2h and 11.7-12.3h, respectively, to obtain a solid.

4. The production process of OSB board modified with bioactive ingredients according to claim 1, characterized in that, The bioactive ingredient is one of lavender extract, peppermint extract and artemisia extract; The particle size of the bioactive ingredient is 37-43 nm.

5. The production process of OSB board modified with bioactive ingredients according to claim 1, characterized in that, In the impregnation step, the mass ratio of the plain base paper, the primary treatment solution, and the secondary treatment solution is 1:2.8-3.0:3.1-3.

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6. The production process of OSB board modified with bioactive ingredients according to claim 1, characterized in that, The molding step involves attaching functional paper to an OSB substrate, followed by pressing, surface finishing, sanding, and drying to obtain an OSB substrate modified with bioactive ingredients.

7. OSB boards modified with bioactive ingredients obtained by the production process according to any one of claims 1-6.

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