Method for preparing antifungal and deodorizing OSB laminates containing bioactive substances

Abstract

To provide a method for preparing an antimold and deodorant OSB laminated sheet good in antibacterial antimold and deodorant capacity, high in mechanical capacity and excellent in antiaging capacity.SOLUTION: The preparation method of the OSB laminate comprises a step of preparing a molecular sieve carrier, wherein the step of preparing the molecular sieve carrier comprises a step of mixing and cross-linking a primary modified zeolite powder, a secondary modified sub-zeolite powder and a modified beta-cyclodextrin, wherein the cross-linking is carried out by adding an acetic acid to chitosane, stirring uniformly, then adding a primary molecular sieve, stirring, raising the temperature to 66 to 68 °C., adding a glutaraldehyde and carrying out ultrasonic treatment, and after the ultrasonic treatment is completed, carrying out ultrasonic treatment at 66 to 68 °C. for 1.9 to 2. 2h stirring, and after the stirring is completed, cooling and washing followed by vacuum freeze drying, wherein the freezing temperature is - 47 to - 42 °C.; The freezing time is 18 to 23h, and the vacuum degree is 30 to 35Pa to prepare a molecular nest carrier. It has good antibacterial and antifungal and deodorant properties, high mechanical properties and excellent anti-aging properties.SELECTED DRAWING: None

Description

Technical Field

[0001] The present invention belongs to the technical field of OSB laminated boards, and specifically relates to a method for preparing an anti - mold and deodorant OSB laminated board containing bioactive substances.

Background Art

[0002] OSB laminated board, also called oriented strand board and pine board, is mainly used for wall priming and is a synthetic wood produced in Europe. With the rapid international development in the 1970s and 1980s, the application of pine board in furniture has achieved unprecedented development. Many large - scale furniture enterprises have started to make furniture using OSB laminated board, which has the advantages of no formaldehyde emission, light weight, wear resistance, and good flatness.

[0003] However, furniture made of OSB laminated board has low anti - mold performance, low antibacterial performance, and is prone to generating odors. Therefore, in existing technologies, bioactive substances are usually added to improve anti - mold performance and deodorant performance.

[0004] The leaves of Equisetum arvense have a mild fragrance, a long aftertaste, a gentle fragrance that persists, a unique pine fragrance, rich volatile oils, and a strong special fragrance. When used in furniture, it emits fragrance. The leaves of Equisetum arvense and Cinnamomum camphora have high insect - proof and anti - mold performance, high antibacterial performance, a long - lasting fragrance, and high deodorant performance.

[0005] Currently, in order to improve the anti - mold, antibacterial, and deodorant performance of OSB laminated board, it is common to add bioactive substances such as the leaves of Equisetum arvense and extracts of Cinnamomum camphora. However, the active ingredients such as the leaves of Equisetum arvense and extracts of Cinnamomum camphora are easily lost, affecting antibacterial and deodorant performance, and their effects do not last long.

[0006] Existing technologies have also been prepared to form molecular nests of plant extracts, wrap the plant extracts, achieve sustained - release performance, enhance antibacterial deodorant and anti - mold performance, and extend the action time. However, the prepared OSB laminated board does not have good aging resistance, and after the aging test, the antibacterial performance has significantly decreased. Furthermore, existing OSB laminates containing bioactive substances have poor mechanical performance and insufficient retention of mechanical performance after aging tests. [Overview of the Initiative]

[0007] To solve the technical problems present in existing technologies, the present invention provides a method for preparing an antifungal and deodorizing OSB laminate containing a bioactive substance that has good antibacterial and deodorizing performance, good antifungal properties, a long duration of action, high mechanical performance, and high aging resistance, and also provides an antifungal and deodorizing OSB laminate containing a bioactive substance.

[0008] To address the above technical problems, the present invention employs the following technical solutions.

[0009] The method for preparing an antifungal and deodorizing OSB laminate containing a bioactive substance is specifically as follows: 1. Biologically active substance preparation The plants are washed, dried to a moisture content of 1.3-1.7 wt%, then placed in an air-jet pulverizer and ground to prepare a powder. The particle size of the powder is controlled to 180-220 nm. The powder is added to 5-7 times its volume of ethanol solution, the stirring speed is controlled to 190-210 rpm, and the temperature is increased while stirring at a rate of 3.5-4.1 °C / min to 56-60 °C. The mixture is stirred for 2.4-2.6 hours. After stirring is complete, microwave-ultrasonic extraction is performed, with the microwave power controlled to 474-485 W and the microwave frequency controlled to 1950-2050 MHz. The ultrasonic frequency is controlled to 30-34 kHz, the ultrasonic power to 354-364 W, the microwave-ultrasonic extraction time is 3.0-3.4 min, after microwave-ultrasonic extraction is complete, the temperature is raised to 64-67°C and kept warm for 1.3-1.7 hours, after which the solution is filtered, the extract is placed under vacuum, the vacuum level is controlled to 0.03-0.05 MPa, and it is kept warm at 72-76°C to concentrate it to 28-32% of the original volume, and finally it is sprayed and dried, and pulverized to a particle size of 245-255 nm to prepare the bioactive substance. The aforementioned plant is either horsetail, balsam camphor tree, or a mixture of plants. The aforementioned mixed plant is a mixture of horsetail needles and balsam camphor wood, and the mass ratio of horsetail needles to balsam camphor wood is 1:1. The volume concentration of the ethanol solution is 68-72%.

[0010] 2. Preparation of molecular nest carriers (1) Primary modified zeolite powder Zeolite powder is impregnated in a sodium hydroxide solution five times its volume at an impregnation temperature of 63-67°C for 52-58 minutes. After impregnation, it is filtered, washed, and dried to prepare the impregnated zeolite powder. The impregnated zeolite powder is then subjected to high-temperature treatment in a calcination furnace. First, the temperature is raised to 176-185°C at a rate of 2.3-2.8°C / min, and then maintained at 176-185°C for 37-42 minutes. After that, the temperature is raised to 362-376°C at a rate of 3.0-3.5°C / min, and then maintained at 362-376°C for 2.4-2.6 hours. After the heat treatment is complete, it is allowed to cool naturally to room temperature to prepare the primary modified zeolite powder. The particle size of the zeolite powder is 380-420 nm. The mass concentration of the sodium hydroxide solution is 28-32%. (2) Secondary modified zeolite powder The primary modified zeolite powder and the modification solution are mixed, the temperature is raised to 60-64°C, and the mixture is stirred for 31-37 minutes, controlling the stirring speed to 357-370 rpm. After uniform stirring, the mixture is cooled to 42-48°C at a rate of 0.4-0.6°C / min, kH560 and hexadecyltrimethoxysilane are added, and the mixture is stirred continuously for 2.4-2.6 hours, controlling the stirring speed to 278-300 rpm. After stirring is complete, the mixture is filtered, washed, and dried to prepare the secondary modified zeolite powder. The aforementioned modified solution consists of a 33-36 wt% ethanol solution, cocoate diethanolamide, and sodium lauryl sulfate, and the mass ratio of the 33-36 wt% ethanol solution, cocoate diethanolamide, and sodium lauryl sulfate is 95-100:1.0-1.5:0.7-0.9. The mass ratio of the primary modified zeolite powder, modified liquid, kH560, and hexadecyltrimethoxysilane is 16-18:90-97:1.0-1.4:0.5-0.7. (3) Modified β-cyclodextrin β-cyclodextrin is placed in anhydrous ethanol, polyvinylpyrrolidone and polyethylene glycol 200 are added, and ball milling is performed. The ball milling temperature is 53-58°C, the ball milling time is 17-22 min, and the ball milling speed is 344-357 rpm. After ball milling is complete, γ-aminopropylmethyldiethyloxysilane is added and ball milling is continued. The ball milling time is 27-32 min and the ball milling speed is 123-133 rpm. After ball milling is complete, the temperature is raised to 64-68°C and the reaction is carried out with stirring for 2.8-3.2 hours. After stirring is complete, it is allowed to cool naturally to room temperature, washed, dried, and modified β-cyclodextrin is prepared. The mass ratio of the aforementioned β-cyclodextrin, anhydrous ethanol, polyvinylpyrrolidone, polyethylene glycol 200, and γ-aminopropylmethyldiethyloxysilane is 34-36:194-205:1.6-1.8:1.8-2.2:2.5-2.7. (4) Mixture Modified β-cyclodextrin is placed in dimethylformamide, then secondary modified zeolite powder and sodium dodecylbenzenesulfonate are added, the temperature is raised to 85-88°C, and sonication is performed for 13-17 minutes, with a sonication power of 44-51W and a sonication frequency of 33-38kHz. After sonication, the mixture is stirred, with the stirring speed controlled to 198-211 rpm, for a stirring time of 2.6-2.8 hours. After stirring, the mixture is washed and dried to prepare the primary molecular structure. The mass ratio of the modified β-cyclodextrin, dimethylformamide, secondary modified zeolite powder, and sodium dodecylbenzenesulfonate is 18-22:125-136:3.6-3.8:2.2-2.5. (5) Bridge After adding acetic acid solution to chitosan and stirring uniformly, add the primary molecular nest and stir for 13-17 minutes. Raise the temperature to 66-68°C, add glutaraldehyde solution, and sonicate. The sonication time is 18-22 minutes, the ultrasonic frequency is 35-37 kHz, and the ultrasonic power is 45-50 W. After sonication, stir at 66-68°C for 1.9-2.2 hours at a stirring speed of 200-208 rpm. After stirring, allow to cool naturally to room temperature, wash three times with acetone, and then vacuum freeze-dry. The freezing temperature is -47--42°C, the freezing time is 18-23 hours, and the vacuum level is 30-35 Pa. After drying, prepare the molecular nest support. The degree of deacetylation of the chitosan is 91.0-91.5%, and its molecular weight is 148,000-153,000. The mass concentration of the acetic acid solution is 4.8-5.1%. The mass-to-volume ratio of the chitosan and acetic acid solution is 0.4-0.6 g:13-17 mL. The mass concentration of the glutaraldehyde solution is 47-51%. The volume ratio of the acetic acid solution to the glutaraldehyde solution is 13-17:3.2-3.6. The mass ratio of the chitosan to the primary molecular nest is 0.4-0.6:0.7-0.9.

[0011] 3. Carrying The molecular nest support is mixed with 7-9 times its volume of deionized water, propylene glycol fatty acid ester is added, the temperature is raised to 45-50°C, and the mixture is stirred for 23-29 minutes. Then, the bioactive substance is added and the mixture is stirred for 2.0-2.3 hours at a stirring speed of 172-180 rpm. After stirring, the mixture is allowed to stand for 6.3-6.7 hours. After standing, the mixture is filtered and dried to prepare the functional molecular nest. The mass ratio of the deionized water, propylene glycol fatty acid ester, and bioactive substance is 94-98:1.1-1.4:8.6-8.8.

[0012] 4.Preparation of functional impregnation agent Add liquid paraffin and carboxymethyl cellulose to deionized water, stir evenly, then raise the temperature to 44 - 48 °C, add functional molecular cages and silica sol, and continue stirring for 32 - 37 min. The stirring rotation speed is 454 - 461 rpm. After the stirring is completed, prepare a functional impregnating agent. The mass ratio of the deionized water, liquid paraffin, carboxymethyl cellulose, functional molecular cages and silica sol is 107 - 114:2.4 - 2.6:8.1 - 8.5:10 - 13:8.7 - 9.2.

[0013] 5. Impregnation Place the OSB laminated board in a sealed container, then pass 6 - 8 times the volume of the functional impregnating agent and isooctanol polyoxyethylene ether, pass nitrogen, raise the pressure to 0.7 - 0.9 MPa, control the impregnation temperature at 53 - 57 °C, and the impregnation time is 4.2 - 4.6 h. After the impregnation is completed, place it in an environment of 28 - 32 °C and ventilate and dry for 11 - 14 h to prepare an anti - mold and deodorant OSB laminated board containing bioactive substances. The mass ratio of the OSB laminated board and isooctanol polyoxyethylene ether is 190 - 210:8.2 - 8.5.

[0014] The anti - mold and deodorant OSB laminated board containing bioactive substances is prepared by the above preparation method.

Advantages of the Invention

[0015] Compared with the prior art, the present invention has the following beneficial effects. 1. The present invention modifies zeolite powder, and the zeolite powder after treatment with the modification solution has good dispersibility. Subsequently, it is treated with kH560 and 0.6 g hexadecyltrimethoxysilane. The hexadecyltrimethoxysilane improves the waterproofing performance of the OSB board material, and kH560 gives epoxy groups to the surface of the zeolite powder. Subsequently, β-cyclodextrin is modified, and amino groups are grafted onto the surface of the β-cyclodextrin. In the mixing process, the surface of the zeolite powder is modified with β-cyclodextrin. Chitosan is prepared as a powder, and then glutaraldehyde is used as a crosslinking agent to crosslink chitosan with zeolite powder whose surface is modified with β-cyclodextrin. As a result, the β-cyclodextrin, zeolite powder, and chitosan are strongly bound together, the structure is stable, the bioactive substance loading effect is good, and the sustained release performance is good. When used in OSB laminates, the antibacterial, deodorizing, and antifungal properties of the OSB laminates are maintained for a long period of time, and it has a good mechanical strengthening effect, which can improve the stability of the OSB laminates. 2. The antifungal and deodorizing OSB laminate containing the bioactive substance prepared in this invention has an antibacterial rate of 91.8-92.6% against Candida albicans, an antibacterial rate of 93.0-95.2% against Staphylococcus aureus, and an antibacterial rate of 92.2-93.7% against Escherichia coli. 3. The antifungal and deodorizing OSB laminate containing the bioactive substance prepared in this invention has an antifungal grade of 0. 4. The antifungal and deodorizing OSB laminate containing the bioactive substance prepared in this invention has a deodorizing performance of Class 1. 5. The antifungal and deodorizing OSB laminate containing the bioactive substance prepared in this invention has an impact strength of 9.2 to 9.8 kJ / m². 2 The tensile strength is 13.4-15.6 MPa, and the compressive strength is 17.1-18.2 MPa. 6. The antifungal and deodorizing OSB laminate containing the bioactive substance prepared according to the present invention was left to stand in an environment with a temperature of 46°C and a humidity of 70% for a standing time of 7 days. After the standing period, the UV intensity was 760 W / m². 2It was left standing for 7 days in the environment described above. Taking the above as one cycle, after performing 10 cycles of treatment, the antibacterial rate against Candida albicans was 86.4 - 87.5%, the antibacterial rate against Staphylococcus aureus was 88.2 - 89.9%, the antibacterial rate against Escherichia coli was 87.1 - 88.2%, and the impact resistance strength was 8.7 - 9.4 kJ / m 2 and the tensile strength was 12.4 - 14.6 MPa, and the compressive strength was 15.9 - 17.1 MPa.

Embodiments for Carrying out the Invention

[0016] To more clearly explain the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will be described below.

[0017] <Example 1> 1. Preparation of Bioactive Substance The plants were washed, dried until the water content reached 1.5 wt%, then placed in an airflow pulverizer for pulverization treatment to prepare a powder. The particle size of the powder was controlled to 200 nm. The powder was added to a six-fold volume of ethanol solution, the stirring speed was controlled to 200 rpm, and the temperature was raised while stirring. The temperature was raised to 58 °C at a rate of 3.8 °C / min, stirred for 2.5 h, and after the stirring ended, microwave-ultrasonic extraction was performed. The microwave power was controlled to 480 W, the microwave frequency was 2000 MHz, the ultrasonic frequency was 32 kHz, the ultrasonic power was 360 W, and the microwave-ultrasonic extraction time was all 3.2 min. After the microwave-ultrasonic extraction ended, the temperature was raised to 65 °C and heat preservation treatment was carried out for 1.5 h. After the heat preservation treatment ended, filtration was performed, the extract was placed in a vacuum environment, the vacuum degree was controlled to 0.04 MPa, and it was heat-preserved at 74 °C and concentrated to 30% of the original volume, and finally spray-dried and pulverized until the particle size reached 250 nm to prepare a bioactive substance. The above plants are mixed plants, and the mixed plants are a mixture of Epimedium leaves and Cinnamomum camphora. The mass ratio of Epimedium leaves to Cinnamomum camphora is 1:1. The volume concentration of the ethanol solution is 70%.

[0018] 2. Preparation of Molecular Sieve Carrier (1) Primary Modified Zeolite Powder Zeolite powder is impregnated in a sodium hydroxide solution six times its volume at an impregnation temperature of 65°C for 55 minutes. After impregnation, it is filtered, washed, and dried to prepare the impregnated zeolite powder. The impregnated zeolite powder is then subjected to high-temperature treatment in a calcination furnace, first increasing the temperature to 180°C at a rate of 2.5°C / min, maintaining the temperature at 180°C for 40 minutes, then increasing the temperature to 370°C at a rate of 3.2°C / min, maintaining the temperature at 370°C for 2.5 hours, and after the heat treatment is complete, it is allowed to cool naturally to room temperature to prepare the primary modified zeolite powder. The particle size of the zeolite powder is 400 nm. The mass concentration of the sodium hydroxide solution is 30%. (2) Secondary modified zeolite powder Mix 17g of primary modified zeolite powder and 93g of modification solution, raise the temperature to 62°C, stir for 34 minutes, control the stirring speed to 365 rpm, and stir uniformly. Then, cool to 45°C at a rate of 0.5°C / min, add 1.2g kH560 and 0.6g hexadecyltrimethoxysilane, continue stirring for 2.5 hours, control the stirring speed to 290 rpm, and after stirring is complete, filter, wash, and dry to prepare secondary modified zeolite powder. The aforementioned modification solution consists of a 35 wt% ethanol solution, coco acid diethanolamide, and sodium lauryl sulfate, and the mass ratio of the 35 wt% ethanol solution, coco acid diethanolamide, and sodium lauryl sulfate is 97:1.2:0.8. (3) Modified β-cyclodextrin 35g β-cyclodextrin was placed in 200g anhydrous ethanol, 1.7g polyvinylpyrrolidone and 2.0g polyethylene glycol 200 were added, and the mixture was ball-milled. The ball-milling temperature was 56°C, the ball-milling time was 20 min, and the ball-milling speed was 352 rpm. After the ball-milling was complete, 2.6g γ-aminopropylmethyldiethyloxysilane was added and the ball-milling was continued for 30 min at a ball-milling speed of 128 rpm. After the ball-milling was complete, the temperature was raised to 66°C and the mixture was reacted with stirring for 3.0h. After stirring was complete, the mixture was allowed to cool naturally to room temperature, washed, dried, and the modified β-cyclodextrin was prepared. (4) Mixture 20g of modified β-cyclodextrin was placed in 130g of dimethylformamide, then 3.7g of secondary modified zeolite powder and 2.4g of sodium dodecylbenzenesulfonate were added, the temperature was raised to 87°C, and sonication was performed for 15 minutes, with a sonication power of 48W and a sonication frequency of 36kHz. After sonication, the mixture was stirred, with the stirring speed controlled to 204rpm, for a stirring time of 2.7h. After stirring, the mixture was washed and dried to prepare the primary molecular structure. (5) Bridge 0.5 g chitosan was mixed with 14 mL of acetic acid solution and stirred uniformly. Then 0.8 g of primary molecular nest was added and stirred for 15 min. The temperature was raised to 67°C, and 3.4 mL of glutaraldehyde solution was added and sonicated. The sonication time was 20 min, the ultrasonic frequency was 36 kHz, and the ultrasonic power was 47 W. After sonication, the mixture was stirred at 67°C for 2.0 h at a stirring speed of 205 rpm. After stirring, it was allowed to cool naturally to room temperature, washed three times with acetone, and then vacuum freeze-dried. The freezing temperature was -45°C, the freezing time was 20 h, and the vacuum level was 32 Pa. After drying, the molecular nest support was prepared. The degree of deacetylation of the chitosan is 91.2%, and its molecular weight is 150,000. The mass concentration of the acetic acid solution is 5.0%. The mass concentration of the glutaraldehyde solution is 50%.

[0019] 3. Carrying A molecular nest support is mixed with 8 times its volume of deionized water, propylene glycol fatty acid ester is added, the temperature is raised to 48°C, and the mixture is stirred for 27 minutes. Then, a bioactive substance is added, and the mixture is stirred for 2.2 hours at a stirring speed of 175 rpm. After stirring, the mixture is allowed to stand for 6.5 hours. After standing, the mixture is filtered and dried to prepare a functional molecular nest. The mass ratio of the deionized water, propylene glycol fatty acid ester, and bioactive substance is 96:1.3:8.7.

[0020] 4.Preparation of functional impregnation agent Liquid paraffin and carboxymethylcellulose were added to deionized water and mixed uniformly. Then the temperature was raised to 46°C, and functional molecular material and silica sol were added. Mixing was continued for 35 minutes at a stirring speed of 458 rpm. After mixing was complete, the functional impregnating agent was prepared. The mass ratio of the deionized water, liquid paraffin, carboxymethylcellulose, functional molecular structure, and silica sol is 110:2.5:8.3:11:9.0.

[0021] 5. Impregnation A 200g OSB laminate is placed in a sealed container, then 7 times its volume of functional impregnating agent and 8.3g of iso-octanol polyoxyethylene ether are passed through it, nitrogen is passed through, the pressure is increased to 0.8MPa, the impregnation temperature is controlled to 55℃, and the impregnation time is 4.5h. After impregnation is complete, it is placed in a 30℃ environment and ventilated and dried for 12h to prepare an anti-mold and deodorizing OSB laminate containing bioactive substances.

[0022] <Example 2> 1. Biologically active substance preparation The plants were washed, dried to a moisture content of 1.3 wt%, then placed in an air-jet pulverizer and ground to prepare a powder. The particle size of the powder was controlled to 180 nm. The powder was added to 5 times its volume of ethanol solution, the stirring speed was controlled to 190 rpm, and the temperature was increased while stirring at a rate of 3.5 °C / min to 56 °C. The stirring was continued for 2.4 hours. After stirring was complete, microwave-ultrasonic extraction was performed, with the microwave power controlled to 474 W and the microwave frequency to 1950 MHz. The ultrasonic frequency was 30 kHz, the ultrasonic power was 354 W, the microwave-ultrasonic extraction time was 3.0 min, after the microwave-ultrasonic extraction was completed, the temperature was raised to 64°C and kept warm for 1.3 hours, after which the solution was filtered, the extract was placed under vacuum, the vacuum level was controlled to 0.03 MPa, and it was kept warm at 72°C to concentrate it to 28% of the original volume, and finally it was sprayed and dried, and pulverized to a particle size of 245 nm to prepare the bioactive substance. The aforementioned plant is horsetail (Equisetum arvense), The volume concentration of the ethanol solution is 68%.

[0023] 2. Preparation of molecular nest carriers (1) Primary modified zeolite powder Zeolite powder is impregnated in a sodium hydroxide solution five times its volume at an impregnation temperature of 63°C for 52 minutes. After impregnation, it is filtered, washed, and dried to prepare the impregnated zeolite powder. The impregnated zeolite powder is then subjected to high-temperature treatment in a calcination furnace, first at a rate of 2.3°C / min to 176°C, then maintained at 176°C for 37 minutes, then at a rate of 3.0°C / min to 362°C, then maintained at 362°C for 2.4 hours. After the heat treatment is complete, it is allowed to cool naturally to room temperature to prepare the primary modified zeolite powder. The particle size of the zeolite powder is 380 nm. The mass concentration of the sodium hydroxide solution is 28%. (2) Secondary modified zeolite powder Mix 16g of primary modified zeolite powder and 90g of modification solution, raise the temperature to 60°C, stir for 31 minutes, control the stirring speed to 357rpm, and stir uniformly. Then, cool to 42°C at a rate of 0.4°C / min, add 1.0g kH560 and 0.5g hexadecyltrimethoxysilane, continue stirring for 2.4 hours, control the stirring speed to 278rpm, and after stirring is complete, filter, wash, and dry to prepare secondary modified zeolite powder. The aforementioned modification solution consists of a 33 wt% ethanol solution, coco acid diethanolamide, and sodium lauryl sulfate, and the mass ratio of the 33 wt% ethanol solution, coco acid diethanolamide, and sodium lauryl sulfate is 95:1.0:0.7. (3) Modified β-cyclodextrin 34 g β-cyclodextrin was placed in 194 g anhydrous ethanol, 1.6 g polyvinylpyrrolidone and 1.8 g polyethylene glycol 200 were added, and the mixture was ball-milled. The ball-milling temperature was 53°C, the ball-milling time was 17 min, and the ball-milling speed was 344 rpm. After the ball-milling was complete, 2.5 g γ-aminopropylmethyldiethyloxysilane was added and the ball-milling process was continued. The ball-milling time was 27 min and the ball-milling speed was 123 rpm. After the ball-milling was complete, the temperature was raised to 64°C and the mixture was reacted with stirring for 2.8 hours. After stirring was complete, the mixture was allowed to cool naturally to room temperature, washed, dried, and the modified β-cyclodextrin was prepared. (4) Mixture 18 g of modified β-cyclodextrin was placed in 125 g of dimethylformamide, then 3.6 g of secondary modified zeolite powder and 2.2 g of sodium dodecylbenzenesulfonate were added, the temperature was raised to 85°C, and sonication was performed for 13 mins, with a sonication power of 44 W and a sonication frequency of 33 kHz. After sonication, the mixture was stirred, with the stirring speed controlled to 198 rpm, for a stirring time of 2.6 h. After stirring, the mixture was washed and dried to prepare the primary molecular structure. (5) Bridge 0.4 g chitosan was mixed with 13 mL of acetic acid solution and stirred uniformly. Then 0.7 g of primary molecular nest was added and stirred for 13 min. The temperature was raised to 66°C, and 3.2 mL of glutaraldehyde solution was added and sonicated. The sonication time was 18 min, the ultrasonic frequency was 35 kHz, and the ultrasonic power was 45 W. After sonication, the mixture was stirred at 66°C for 1.9 h at a stirring speed of 200 rpm. After stirring, it was allowed to cool naturally to room temperature, washed three times with acetone, and then vacuum freeze-dried. The freezing temperature was -47°C, the freezing time was 18 h, and the vacuum level was 30 Pa. After drying, the molecular nest support was prepared. The degree of deacetylation of the chitosan is 91.0%, and its molecular weight is 148,000. The mass concentration of the acetic acid solution is 4.8%. The mass concentration of the glutaraldehyde solution is 47%.

[0024] 3. Carrying A molecular nest support is mixed with 7 times its volume of deionized water, propylene glycol fatty acid ester is added, the temperature is raised to 45°C, and the mixture is stirred for 23 minutes. Then, a bioactive substance is added, and the mixture is stirred for 2.0 hours at a stirring speed of 172 rpm. After stirring, the mixture is allowed to stand for 6.3 hours. After standing, the mixture is filtered and dried to prepare a functional molecular nest. The mass ratio of the deionized water, propylene glycol fatty acid ester, and bioactive substance is 94:1.1:8.6.

[0025] 4.Preparation of functional impregnation agent Liquid paraffin and carboxymethylcellulose were added to deionized water and mixed uniformly. Then the temperature was raised to 44°C, and functional molecular material and silica sol were added. Mixing was continued for 32 minutes at a stirring speed of 454 rpm. After mixing was complete, the functional impregnation agent was prepared. The mass ratio of the deionized water, liquid paraffin, carboxymethylcellulose, functional molecular structure, and silica sol is 107:2.4:8.1:10:8.7.

[0026] 5. Impregnation A 190g OSB laminate is placed in a sealed container, then 6 times its volume of functional impregnating agent and 8.2g of iso-octanol polyoxyethylene ether are passed through it, nitrogen is passed through, the pressure is increased to 0.7MPa, the impregnation temperature is controlled to 53°C, and the impregnation time is 4.2h. After impregnation is complete, it is placed in a 28°C environment and ventilated and dried for 11h to prepare an anti-mold and deodorizing OSB laminate containing bioactive substances.

[0027] <Example 3> 1. Biologically active substance preparation The plants were washed, dried to a moisture content of 1.7 wt%, then placed in an air-jet pulverizer and ground to prepare a powder. The particle size of the powder was controlled to 220 nm. The powder was added to 7 times its volume of ethanol solution, the stirring speed was controlled to 210 rpm, and the temperature was increased while stirring at a rate of 4.1 °C / min to 60 °C. The stirring was continued for 2.6 hours. After stirring was complete, microwave-ultrasonic extraction was performed, with the microwave power controlled to 485 W and the microwave frequency set to 2050 MHz. The ultrasonic frequency was 34 kHz, the ultrasonic power was 364 W, the microwave-ultrasonic extraction time was 3.4 min, after the microwave-ultrasonic extraction was completed, the temperature was raised to 67°C and kept warm for 1.7 hours, after which it was filtered, the extract was placed under vacuum, the vacuum level was controlled to 0.05 MPa, and it was kept warm at 76°C to concentrate it to 32% of the original volume, and finally it was sprayed and dried, and pulverized to a particle size of 255 nm to prepare the bioactive substance. The aforementioned plant is the balsam camphor tree. The volume concentration of the ethanol solution is 72%.

[0028] 2. Preparation of molecular nest carriers (1) Primary modified zeolite powder Zeolite powder was impregnated in a sodium hydroxide solution seven times its volume at an impregnation temperature of 67°C for 58 minutes. After impregnation, it was filtered, washed, and dried to prepare the impregnated zeolite powder. The impregnated zeolite powder was then subjected to high-temperature treatment in a calcination furnace, first increasing the temperature to 185°C at a rate of 2.8°C / min, maintaining the temperature at 185°C for 42 minutes, then increasing the temperature to 376°C at a rate of 3.5°C / min, maintaining the temperature at 376°C for 2.6 hours, and after the heat treatment was completed, it was allowed to cool naturally to room temperature to prepare the primary modified zeolite powder. The particle size of the zeolite powder is 420 nm. The mass concentration of the sodium hydroxide solution is 32%. (2) Secondary modified zeolite powder Mix 18g of primary modified zeolite powder and 97g of modification solution, raise the temperature to 64°C, stir for 37 minutes, control the stirring speed to 370rpm, and stir uniformly. Then, cool to 48°C at a rate of 0.6°C / min, add 1.4g kH560 and 0.7g hexadecyltrimethoxysilane, continue stirring for 2.6 hours, control the stirring speed to 300rpm, and after stirring is complete, filter, wash, and dry to prepare secondary modified zeolite powder. The aforementioned modified solution consists of a 36 wt% ethanol solution, coco acid diethanolamide, and sodium lauryl sulfate, and the mass ratio of the 36 wt% ethanol solution, coco acid diethanolamide, and sodium lauryl sulfate is 100:1.5:0.9. (3) Modified β-cyclodextrin 36 g β-cyclodextrin was placed in 205 g anhydrous ethanol, 1.8 g polyvinylpyrrolidone and 2.2 g polyethylene glycol 200 were added, and the mixture was ball-milled. The ball-milling temperature was 58°C, the ball-milling time was 22 min, and the ball-milling speed was 357 rpm. After the ball-milling was complete, 2.7 g γ-aminopropylmethyldiethyloxysilane was added and the ball-milling process was continued for 32 min at a ball-milling speed of 133 rpm. After the ball-milling was complete, the temperature was raised to 68°C and the mixture was reacted with stirring for 3.2 hours. After stirring was complete, the mixture was allowed to cool naturally to room temperature, washed, dried, and the modified β-cyclodextrin was prepared. (4) Mixture 22g of modified β-cyclodextrin was placed in 136g of dimethylformamide, then 3.8g of secondary modified zeolite powder and 2.5g of sodium dodecylbenzenesulfonate were added, the temperature was raised to 88°C, and sonication was performed for 17 minutes, with a sonication power of 51W and a sonication frequency of 38kHz. After sonication, the mixture was stirred, with the stirring speed controlled to 211rpm, for a stirring time of 2.8h. After stirring, the mixture was washed and dried to prepare the primary molecular structure. (5) Bridge 0.6 g chitosan was mixed with 17 mL of acetic acid solution and stirred uniformly. Then, 0.9 g of primary molecular nest was added and stirred for 17 min. The temperature was raised to 68°C, and 3.6 mL of glutaraldehyde solution was added and sonicated. The sonication time was 22 min, the ultrasonic frequency was 37 kHz, and the ultrasonic power was 50 W. After sonication, the mixture was stirred at 68°C for 2.2 hours at a stirring speed of 208 rpm. After stirring, it was allowed to cool naturally to room temperature, washed three times with acetone, and then vacuum freeze-dried. The freezing temperature was -42°C, the freezing time was 23 hours, and the vacuum level was 35 Pa. After drying, the molecular nest support was prepared. The degree of deacetylation of the chitosan is 91.5%, and its molecular weight is 153,000. The mass concentration of the acetic acid solution is 5.1%. The mass concentration of the glutaraldehyde solution is 51%.

[0029] 3. Carrying A molecular nest support is mixed with 9 times its volume of deionized water, propylene glycol fatty acid ester is added, the temperature is raised to 50°C, and the mixture is stirred for 29 minutes. Then, a bioactive substance is added, and the mixture is stirred for 2.3 hours at a stirring speed of 180 rpm. After stirring, the mixture is allowed to stand for 6.7 hours. After standing, the mixture is filtered and dried to prepare a functional molecular nest. The mass ratio of the deionized water, propylene glycol fatty acid ester, and bioactive substance is 98:1.4:8.8.

[0030] 4.Preparation of functional impregnation agent Liquid paraffin and carboxymethylcellulose were added to deionized water and mixed uniformly. Then the temperature was raised to 48°C, and functional molecular material and silica sol were added. Mixing was continued for 37 minutes at a stirring speed of 461 rpm. After mixing was complete, the functional impregnating agent was prepared. The mass ratio of the deionized water, liquid paraffin, carboxymethylcellulose, functional molecular structure, and silica sol is 114:2.6:8.5:13:9.2.

[0031] 5. Impregnation A 210g OSB laminate is placed in a sealed container, then 8 times its volume of functional impregnating agent and 8.5g isooctanolic polyoxyethylene ether are passed through it, nitrogen is passed through, the pressure is increased to 0.9MPa, the impregnation temperature is controlled to 57°C, and the impregnation time is 4.6h. After impregnation is complete, it is placed in a 32°C environment and ventilated and dried for 14h to prepare an antifungal and deodorizing OSB laminate containing bioactive substances.

[0032] <Comparative Example 1> Based on Example 1, the following modifications were made: (1) The steps of primary modified zeolite powder and secondary modified zeolite powder are omitted, and in the mixing step, the secondary modified zeolite powder is replaced with an equal amount of untreated zeolite powder. (2) In the modified β-cyclodextrin step, polyvinylpyrrolidone and polyethylene glycol 200 are replaced with equal amounts of anhydrous ethanol. Other operations are the same.

[0033] <Comparative Example 2> Based on Example 1, the following modifications were made: (1) In the secondary modified zeolite powder step, replace the coco acid diethanolamide and sodium lauryl sulfate in the modification solution with an equal volume of 35 wt% ethanol solution. (2) The crosslinking process is omitted, and in the loading process, the molecular nest carrier is replaced with an equal amount of primary molecular nests. Other operations are the same.

[0034] Performance detection The performance of the antifungal and deodorizing OSB laminates containing bioactive substances prepared in Examples 1-3 and Comparative Examples 1-3 was detected, and specifically, the results were as follows: (1) Antibacterial performance JPEG0007840384000001.jpg44170(2) Anti-mold performance JPEG0007840384000002.jpg14170(3) Deodorizing performance JPEG0007840384000003.jpg15170(4) Mechanical performance JPEG0007840384000004.jpg44170(5) Aging resistance performance The products prepared in Examples 1-3 and Comparative Examples 1-2 were left to stand in an environment with a temperature of 46°C and a humidity of 70% for 7 days. After the standing period, the UV intensity was 760 W / m². 2 The product was left undisturbed in the environment for 7 days, and the above constituted one cycle. After 10 cycles of processing, the product performance was detected again, specifically as follows: JPEG0007840384000005.jpg59170

[0035] This invention modifies zeolite powder, and the zeolite powder after treatment with the modification solution has good dispersibility. Subsequently, it is treated with kH560 and 0.6g hexadecyltrimethoxysilane. The hexadecyltrimethoxysilane improves the waterproofing performance of the OSB board material, and kH560 gives epoxy groups to the surface of the zeolite powder. Subsequently, β-cyclodextrin is modified, and amino groups are grafted onto the surface of the β-cyclodextrin. A mixing step prepares zeolite powder whose surface is modified with β-cyclodextrin, and then glutaramide is added. By using rudenhyde as a crosslinking agent, chitosan and zeolite powder modified with β-cyclodextrin on its surface are crosslinked, resulting in strong bonding between β-cyclodextrin, zeolite powder, and chitosan, a stable structure, good support for bioactive substances, good sustained release performance, strong impregnation and penetration into OSB laminates, uniform impregnation, homogeneous and stable components of the OSB laminates, long-term maintenance of antibacterial, deodorizing, and antifungal properties of the OSB laminates, good mechanical strengthening effect, and improved aging resistance of the OSB laminates.

[0036] Unless otherwise specified, all percentages used in this invention are mass percentages.

[0037] Finally, the above are merely preferred embodiments of the present invention and are not intended to limit the invention. The invention will be described in detail with reference to the above embodiments, but those skilled in the art should note that it is still possible to modify the technical solutions described in the above embodiments or to substitute some of the technical features. Any modifications, substitutions, improvements, etc., made without departing from the spirit and principles of the invention shall all be within the scope of protection of the invention.

Claims

1. A method for preparing an antifungal and deodorizing OSB laminate containing a bioactive substance, wherein the preparation method includes the steps of preparing the bioactive substance, preparing the molecular carrier, supporting it, preparing the functional impregnating agent, and impregnating it. The aforementioned molecular carrier preparation step includes a step of mixing and crosslinking primary modified zeolite powder, secondary modified zeolite powder, and modified β-cyclodextrin. The process for the primary modified zeolite powder involves impregnating the zeolite powder in a sodium hydroxide solution five times its volume, with an impregnation temperature of 63-67°C and an impregnation time of 52-58 mins. After impregnation, the powder is filtered, washed, and dried to prepare the post-impregnation zeolite powder. The post-impregnation zeolite powder is then subjected to high-temperature treatment in a calcination furnace, first at a rate of 2.3-2.8°C / min at 176°C- The temperature is raised to 185°C, maintained at 176-185°C for 37-42 mins, then raised at a rate of 3.0-3.5°C / min to 362-376°C, and then heated for 2.4-2.6°C at 362-376°C. The process involves maintaining the temperature, then allowing it to cool naturally to room temperature after the temperature-maintaining treatment is complete, to prepare the primary modified zeolite powder. The process for the secondary modified zeolite powder involves mixing the primary modified zeolite powder with the modification liquid, raising the temperature to 60-64°C, stirring for 31-37 minutes, controlling the stirring speed to 357-370 rpm, stirring uniformly, and then cooling to 42-48°C at a rate of 0.4-0.6°C / min. Add kH560 and hexadecyltrimethoxysilane, continue stirring for 2.4 to 2.6 hours, control the stirring speed to 278 to 300 rpm, and after stirring is complete, filter, wash, and dry to prepare the secondary modified zeolite powder. The aforementioned modification solution consists of a 33-36 wt% ethanol solution, cocoacid diethanolamide, and sodium lauryl sulfate. The modification process for the modified β-cyclodextrin involves placing β-cyclodextrin in anhydrous ethanol, adding polyvinylpyrrolidone and polyethylene glycol 200, and performing a ball mill treatment. The ball mill temperature is 53-58°C, the ball mill time is 17-22 mins, and the ball mill rotation speed is 344-357 rpm. After the ball milling is complete, γ-aminopropylmethyldiethyloxysilane is added and the ball mill treatment is continued. The ball mill time is 27-32 mins, and the ball mill rotation speed is 123-133 rpm. After the ball mill treatment is complete, the temperature is raised to 64-68°C, and the reaction is carried out with stirring for 2.8-3.2 hours. After stirring is complete, the mixture is allowed to cool naturally to room temperature, washed, dried, and the modified β-cyclodextrin is prepared. The aforementioned mixing step involves adding modified β-cyclodextrin to dimethylformamide, then adding secondary modified zeolite powder and sodium dodecylbenzenesulfonate, raising the temperature to 85-88°C, and performing sonication for 13-17 minutes, with an ultrasonic power of 44-51 W and an ultrasonic frequency of 33-38 kHz. After the sonication is complete, the mixture is stirred, with the stirring speed controlled to 198-211 rpm and the stirring time 2.6-2.8 hours. After stirring, the mixture is washed and dried to prepare the primary molecular structure. A method for preparing an antifungal and deodorizing OSB laminate containing a bioactive substance, characterized in that the crosslinking step involves adding an acetic acid solution to chitosan, stirring uniformly, adding a primary molecular nest, stirring for 13 to 17 minutes, raising the temperature to 66 to 68°C, adding a glutaraldehyde solution and performing ultrasonic treatment, the ultrasonic treatment time being 18 to 22 minutes, the ultrasonic frequency being 35 to 37 kHz, and the ultrasonic power being 45 to 50 W, stirring at 66 to 68°C for 1.9 to 2.2 hours after the ultrasonic treatment, the stirring rotation speed being 200 to 208 rpm, cooling naturally to room temperature after the stirring is completed, washing three times with acetone, and then vacuum freeze-drying, the freezing temperature being -47 to -42°C, the freezing time being 18 to 23 hours, and the vacuum level being 30 to 35 Pa, and preparing a molecular nest support after drying.

2. In the process of primary modified zeolite powder, the particle size of the zeolite powder is 380 to 420 nm. The mass concentration of the sodium hydroxide solution is 28-32%. In the process of secondary modified zeolite powder, the mass ratio of the 33-36 wt% ethanol solution, cocoate diethanolamide, and sodium lauryl sulfate in the modification solution is 95-100:1.0-1.5:0.7-0.

9. The mass ratio of the primary modified zeolite powder, the modified liquid, kH560, and hexadecyltrimethoxysilane is 16-18:90-97:1.0-1.4:0.5-0.

7. A method for preparing an antifungal and deodorizing OSB laminate containing the bioactive substance described in claim 1.

3. A method for preparing an antifungal and deodorizing OSB laminate containing a biologically active substance, characterized in that, in the step of modifying β-cyclodextrin, the mass ratio of β-cyclodextrin, anhydrous ethanol, polyvinylpyrrolidone, polyethylene glycol 200, and γ-aminopropylmethyldiethyloxysilane is 34-36:194-205:1.6-1.8:1.8-2.2:2.5-2.

7.

4. In the mixing step, the mass ratio of the modified β-cyclodextrin, dimethylformamide, secondary modified zeolite powder, and sodium dodecylbenzenesulfonate is 18-22:125-136:3.6-3.8:2.2-2.5, characterized in that (1) A method for preparing an antifungal and deodorizing OSB laminate containing the bioactive substance described above.

5. In the aforementioned crosslinking process, the degree of deacetylation of the chitosan is 91.0 to 91.5%, and the molecular weight is 148,000 to 153,000. The mass concentration of the acetic acid solution is 4.8 to 5.1%. The mass-to-volume ratio of the chitosan and acetic acid solution is 0.4 to 0.6 g: 13 to 17 mL. The mass concentration of the glutaraldehyde solution is 47-51%. The volume ratio of the acetic acid solution to the glutaraldehyde solution is 13-17:3.2-3.

6. the law of nature, The mass ratio of the chitosan to the primary molecular structure is 0.4-0.6:0.7-0.

9. A method for preparing an antifungal and deodorizing OSB laminate containing the bioactive substance described in claim 1, characterized by the above.

6. The process for preparing the bioactive substance involves washing the plant, drying it to a moisture content of 1.3-1.7 wt%, then placing it in an air-jet pulverizer for pulverization to prepare a powder, controlling the particle size of the powder to 180-220 nm, adding the powder to 5-7 times its volume in an ethanol solution, controlling the stirring speed to 190-210 rpm, and increasing the temperature while stirring at a rate of 3.5-4.1°C / min at 56°C- The process involves raising the temperature to 60°C, stirring for 2.4 to 2.6 hours, then performing microwave-ultrasonic extraction with the microwave power controlled to 474 to 485 W, the microwave frequency to 1950 to 2050 MHz, the ultrasonic frequency to 30 to 34 kHz, and the ultrasonic power to 354 to 364 W, with a microwave-ultrasonic extraction time of 3.0 to 3.4 minutes. After microwave-ultrasonic extraction, the temperature is raised to 64 to 67°C and maintained for 1.3 to 1.7 hours. After the maintenance period, the mixture is filtered, the extract is placed under vacuum, the vacuum level is controlled to 0.03 to 0.05 MPa, and it is maintained at 72 to 76°C to concentrate it to 28 to 32% of its original volume. Finally, it is sprayed and dried, and pulverized to a particle size of 245 to 255 nm to prepare a bioactive substance. The aforementioned plant is either horsetail, balsam camphor tree, or a mixture of plants. The aforementioned mixed plant is a mixture of horsetail needles and balsam camphor wood, and the mass ratio of horsetail needles to balsam camphor wood is 1:

1. A method for preparing an antifungal and deodorizing OSB laminate containing a biologically active substance, characterized in that the volume concentration of the ethanol solution is 68 to 72%.

7. The aforementioned loading process involves mixing the molecular nest support with 7 to 9 times its volume of deionized water, adding propylene glycol fatty acid ester, raising the temperature to 45 to 50°C, stirring for 23 to 29 minutes, then adding the bioactive substance, stirring for 2.0 to 2.3 hours at a stirring speed of 172 to 180 rpm, allowing the mixture to stand for 6.3 to 6.7 hours after stirring, filtering and drying the mixture to prepare a functional molecular nest. A method for preparing an antifungal and deodorizing OSB laminate containing a bioactive substance, characterized in that the mass ratio of the deionized water, propylene glycol fatty acid ester, and bioactive substance is 94-98:1.1-1.4:8.6-8.

8.

8. The process for preparing the functional impregnating agent involves adding liquid paraffin and carboxymethylcellulose to deionized water, stirring uniformly, raising the temperature to 44-48°C, adding the functional molecular structure and silica sol, and continuing to stir for 32-37 minutes at a stirring speed of 454-461 rpm. After the stirring is complete, the functional impregnating agent is prepared. A method for preparing an antifungal and deodorizing OSB laminate containing a bioactive substance according to claim 1, characterized in that the mass ratio of the deionized water, liquid paraffin, carboxymethylcellulose, functional molecular structure, and silica sol is 107-114:2.4-2.6:8.1-8.5:10-13:8.7-9.

2.

9. The impregnation process involves placing the OSB laminate in a sealed container, then passing 6 to 8 times its volume of a functional impregnating agent and iso-octanol polyoxyethylene ether through it, passing nitrogen through it, increasing the pressure to 0.7 to 0.9 MPa, controlling the impregnation temperature to 53 to 57°C, and impregnation for 4.2 to 4.6 hours. After impregnation, the laminate is placed in an environment of 28 to 32°C and ventilated and dried for 11 to 14 hours to prepare an anti-mold and deodorizing OSB laminate containing a bioactive substance. The bioactive substance according to claim 1 is characterized in that the mass ratio of the OSB laminate to isooctanolic polyoxyethylene ether is 190 to 210:8.2 to 8.

5. A method for preparing an antifungal and deodorizing OSB laminate.

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