Method for preparing antifungal and deodorant 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 relates to the technical field of OSB laminates, and more particularly to a method for preparing anti-mold and deodorizing OSB laminates containing bioactive substances. [Background technology]

[0002] OSB laminate, also known as oriented strand board or pine board, is a European synthetic wood primarily used for wall lining. With the rapid development of the international market in the 1970s and 1980s, the application of pine board to furniture production saw unprecedented growth. Many large furniture companies began to use OSB laminate to make furniture, as it has the advantages of no formaldehyde emission, light weight, wear resistance, and good flatness.

[0003] However, furniture made from OSB laminate has poor anti-mold and anti-bacterial properties and is prone to odors, so existing technologies usually add biologically active substances to improve anti-mold and deodorizing properties.

[0004] Horsetail pine needles have a mellow fragrance, a long aftertaste, and a gentle, lasting scent. They have the unique scent of pine, are rich in volatile oils, and have a strong, special fragrance. They are used in furniture to give off fragrance. Horsetail pine needles and balsam camphor tree have strong insect and mildew repellent properties, strong antibacterial properties, long-lasting fragrance, and strong deodorizing properties.

[0005] Currently, it is common to add biologically active substances such as horsetail pine needles and balsam camphor extract to enhance the anti-mold, antibacterial and deodorizing properties of OSB laminates. However, these active ingredients are easily lost, which affects the antibacterial and deodorizing properties and also shortens their lifespan.

[0006] Existing technology also prepares a molecular nest of plant extracts, encapsulating the plant extracts and achieving sustained release, enhancing antibacterial, deodorizing and antifungal properties, and extending the duration of action. However, the prepared OSB laminates have poor aging resistance, and the antibacterial performance is significantly reduced after aging tests. Furthermore, existing OSB laminates containing bioactive materials have poor mechanical performance and insufficient retention of mechanical performance after aging tests. Summary of the Invention

[0007] In order to solve the technical problems existing in the existing technology, the present invention provides a method for preparing an anti-mold and deodorizing OSB laminate containing bioactive substances, which has good antibacterial and deodorizing performance, good anti-mold properties, long action time, excellent mechanical properties, and excellent aging resistance, and also provides an anti-mold and deodorizing OSB laminate containing bioactive substances.

[0008] For the above technical problems, the present invention adopts the following technical solutions.

[0009] The method for preparing antifungal and deodorizing OSB laminate containing bioactive substances is specifically as follows: 1. Biologically active substance preparation The plant material is washed and dried to a moisture content of 1.3-1.7 wt%, then crushed in an airflow mill to prepare a powder. The particle size of the powder is controlled to 180-220 nm. The powder is added to a 5-7-fold volume of ethanol solution, and the stirring speed is controlled to 190-210 rpm. The temperature is raised to 56-60°C at a rate of 3.5-4.1°C / min and stirred for 2.4-2.6 hours. After stirring, microwave-ultrasonic extraction is performed, with the microwave power controlled to 474-485W and the microwave frequency controlled to 1950-2050MHz. The ultrasonic frequency is controlled at 30-34kHz, the ultrasonic power is controlled at 354-364W, and the microwave-ultrasonic extraction time is 3.0-3.4min. After the microwave-ultrasonic extraction is completed, the temperature is raised to 64-67℃ and kept at that temperature for 1.3-1.7h. After the keeping temperature is completed, the extract is filtered and placed in a vacuum environment, the vacuum degree is controlled at 0.03-0.05MPa, and the extract is kept at 72-76℃ to concentrate to 28-32% of the original volume. Finally, the extract is spray-dried and pulverized to a particle size of 245-255nm to prepare the bioactive substance. the plant is either horsetail, pine needles, balsam camphor tree or a mixed plant; The mixed plant is a mixture of horsetail pine needles and balsam camphor tree, and the mass ratio of the horsetail pine needles to the balsam camphor tree is 1:1; The volume concentration of the ethanol solution is 68 to 72%.

[0010] 2. Molecular Nest Carrier Preparation (1) Primary modified zeolite powder The zeolite powder is impregnated in a 5-fold volume of sodium hydroxide solution, the impregnation temperature is 63-67°C, and the impregnation time is 52-58 minutes. After the impregnation is completed, it is filtered, washed, and dried to obtain the impregnated zeolite powder. The impregnated zeolite powder is then put into a calcination furnace for high-temperature treatment. The temperature is first increased to 176-185°C at a rate of 2.3-2.8°C / min, and kept at 176-185°C for 37-42 minutes. Then, the temperature is increased to 362-376°C at a rate of 3.0-3.5°C / min, and kept at 362-376°C for 2.4-2.6 hours. After the heat-keeping treatment is completed, it is naturally cooled to room temperature to obtain the primary modified zeolite powder. The particle diameter of the zeolite powder is 380 to 420 nm, The mass concentration of the sodium hydroxide solution is 28 to 32%. (2) Secondary modified zeolite powder Mix the primary modified zeolite powder and the modified liquid, raise the temperature to 60-64°C, stir for 31-37 minutes, control the stirring speed at 357-370 rpm, stir uniformly, then cool to 42-48°C at a rate of 0.4-0.6°C / min, add KH560 and hexadecyltrimethoxysilane, continue stirring for 2.4-2.6 hours, control the stirring speed at 278-300 rpm, after stirring is completed, filter, wash and dry to prepare the secondary modified zeolite powder. the modifying liquid is composed of a 33 to 36 wt % ethanol solution, coco acid diethanolamide, and sodium lauryl sulfate, and the mass ratio of the 33 to 36 wt % ethanol solution, coco acid diethanolamide, and sodium lauryl sulfate is 95 to 100: 1.0 to 1.5: 0.7 to 0.9; The mass ratio of the primary modified zeolite powder, the modifying 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 absolute ethanol, and polyvinylpyrrolidone and polyethylene glycol 200 are added and ball milled. The ball mill temperature is 53-58°C, the ball milling time is 17-22 min, and the ball mill rotation speed is 344-357 rpm. After the ball milling is completed, γ-aminopropylmethyldiethyloxysilane is added and ball milling is continued. The ball milling time is 27-32 min, and the ball mill rotation speed is 123-133 rpm. After the ball milling is completed, the temperature is raised to 64-68°C and the reaction is carried out with stirring for 2.8-3.2 h. After the stirring is completed, the mixture is allowed to cool to room temperature, washed, and dried to prepare modified β-cyclodextrin. The mass ratio of the β-cyclodextrin, absolute ethanol, polyvinylpyrrolidone, polyethylene glycol 200, and γ-aminopropylmethyldiethyloxysilane was 34-36:194-205:1.6-1.8:1.8-2.2:2.5-2.7. (4) Mixture The modified β-cyclodextrin is placed in dimethylformamide, and then the secondary modified zeolite powder and sodium dodecylbenzenesulfonate are added. The temperature is raised to 85-88°C, and ultrasonic treatment is performed. The ultrasonic time is 13-17 min, the ultrasonic power is 44-51 W, and the ultrasonic frequency is 33-38 kHz. After the ultrasonic treatment is completed, the mixture is stirred. The stirring speed is controlled to 198-211 rpm, and the stirring time is 2.6-2.8 h. After the stirring is completed, the mixture is washed and dried to prepare the primary molecular nest. 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) Crosslinking Add acetic acid solution to chitosan and stir evenly, then add primary molecular nest, stir for 13-17 minutes, raise the temperature to 66-68℃, add glutaraldehyde solution and ultrasonicate, ultrasonic time is 18-22 minutes, ultrasonic frequency is 35-37kHz, ultrasonic power is 45-50W, after ultrasonication, stir at 66-68℃ for 1.9-2.2 hours, stirring speed is 200-208rpm, after stirring, cool to room temperature, wash with acetone three times, and then freeze-dry in vacuum, freezing temperature is -47--42℃, freezing time is 18-23 hours, vacuum degree is 30-35Pa, and after drying, molecular nest carrier is prepared. The chitosan has a deacetylation degree of 91.0 to 91.5% and a molecular weight of 148,000 to 153,000; The mass concentration of the acetic acid solution is 4.8 to 5.1%, The mass / volume ratio of the chitosan to the acetic acid solution is 0.4-0.6 g:13-17 mL, The mass concentration of the glutaraldehyde solution is 47 to 51%, The volume ratio of the acetic acid solution to the glutaraldehyde solution is 13 to 17:3.2 to 3.6; The mass ratio of the chitosan to the primary molecular ring is 0.4 to 0.6:0.7 to 0.9.

[0011] 3. Support Mix the molecular nest carrier with 7-9 times the volume of deionized water, add propylene glycol fatty acid ester, raise the temperature to 45-50°C, stir for 23-29 minutes, then add the bioactive substance, stir for 2.0-2.3 hours, the stirring speed is 172-180 rpm, and after stirring, let stand for 6.3-6.7 hours, filter and dry to prepare 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 and stir evenly. Then, raise the temperature to 44-48°C, add functional molecular nests and silica sol, and continue stirring for 32-37 minutes at a stirring speed of 454-461 rpm. After stirring, the functional impregnating agent is prepared. The mass ratio of the deionized water, liquid paraffin, carboxymethyl cellulose, functional molecule nests and silica sol is 107-114:2.4-2.6:8.1-8.5:10-13:8.7-9.2.

[0013] 5. Impregnation The OSB laminate is placed in a sealed container, and then 6 to 8 times the volume of functional impregnation agent and isooctanol polyoxyethylene ether are passed through. Nitrogen is passed through, and the pressure is increased to 0.7 to 0.9 MPa. The impregnation temperature is controlled at 53 to 57°C, and the impregnation time is 4.2 to 4.6 hours. After impregnation is completed, the OSB 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 biologically active substances. The mass ratio of the OSB laminate to isooctanol polyoxyethylene ether is 190-210:8.2-8.5.

[0014] The anti-mold and deodorizing OSB laminate containing the bioactive substance is prepared by the above-mentioned preparation method. [Effects 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 liquid has good dispersibility. It is then treated with kH560 and 0.6g hexadecyltrimethoxysilane. The hexadecyltrimethoxysilane improves the waterproofing performance of OSB boards. The kH560 provides epoxy groups on the surface of the zeolite powder. Then, β-cyclodextrin is modified, and amino groups are grafted onto the surface of the β-cyclodextrin. The zeolite whose surface is modified with β-cyclodextrin is then mixed. The zeolite powder was prepared by using glutaraldehyde as a crosslinking agent to crosslink chitosan with zeolite powder whose surface was modified with β-cyclodextrin. This resulted in a strong bond between the β-cyclodextrin, zeolite powder and chitosan, a stable structure, good bioactive substance loading effect, and good sustained release performance. When used in OSB laminates, the antibacterial, deodorizing, and antifungal properties of the OSB laminates can be maintained for a long time, and the OSB laminates can have good mechanical strengthening effects and improve the stability of the OSB laminates. 2. The antifungal and deodorizing OSB laminate containing the bioactive substance prepared by the present invention has an antibacterial rate of 91.8-92.6% against Candida albicans, 93.0-95.2% against Staphylococcus aureus, and 92.2-93.7% against Escherichia coli. 3. The anti-mold and deodorizing OSB laminate containing the bioactive substance prepared by the present invention has an anti-mold grade of 0. 4. The anti-mold and deodorizing OSB laminate containing the bioactive substance prepared by the present invention has first-class deodorizing performance. 5. The anti-mold and deodorizing OSB laminate containing the bioactive substance prepared by the present invention has an impact resistance of 9.2 to 9.8 kJ / m 2 The tensile strength is 13.4 to 15.6 MPa, and the compressive strength is 17.1 to 18.2 MPa. 6. The anti-mold and deodorizing OSB laminate containing the bioactive substance prepared by the present invention was left in an environment at a temperature of 46°C and a humidity of 70%, for 7 days, and after the end of the period, it was exposed to ultraviolet light at an intensity of 760 W / m 2After 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%, and the antibacterial rate against Escherichia coli was 87.1-88.2%, and the impact strength was 8.7-9.4kJ / m 2 The tensile strength is 12.4 to 14.6 MPa, and the compressive strength is 15.9 to 17.1 MPa. DETAILED DESCRIPTION OF THE INVENTION

[0016] In order to more clearly describe the technical features, objects and effects of the present invention, specific embodiments of the present invention are described below.

[0017] Example 1 1. Biologically active substance preparation The plant material was washed and dried to a moisture content of 1.5 wt%, then crushed in an airflow mill to prepare a powder. The particle size of the powder was controlled to 200 nm. The powder was added to a 6-fold volume of ethanol solution, the stirring speed was controlled to 200 rpm, and the temperature was raised while stirring, and the temperature was raised to 58 ° C at a rate of 3.8 ° C / min. After stirring, microwave-ultrasonic extraction was performed, with the microwave power controlled to 480 W and the microwave frequency controlled to 2000 MHz. The ultrasonic frequency was 32kHz, the ultrasonic power was 360W, and the microwave-ultrasonic extraction time was 3.2min. After the microwave-ultrasonic extraction was completed, the temperature was raised to 65℃ and kept at 40°C for 1.5h. After the keeping at 40°C, the extract was filtered and placed in a vacuum environment. The vacuum was controlled to 0.04MPa and kept at 74℃ until it was concentrated to 30% of its original volume. Finally, it was sprayed and dried to pulverize the particles to a diameter of 250nm, thereby obtaining the bioactive substance. The plant is a mixed plant, the mixed plant is a mixture of horsetail pine needles and balsam camphor tree, and the mass ratio of the horsetail pine needles to the balsam camphor tree is 1:1; The volume concentration of the ethanol solution is 70%.

[0018] 2. Molecular Nest Carrier Preparation (1) Primary modified zeolite powder The zeolite powder is impregnated in a 6-fold volume of sodium hydroxide solution, the impregnation temperature is 65°C, and the impregnation time is 55 minutes. After the impregnation is completed, it is filtered, washed, and dried to obtain the impregnated zeolite powder. After the impregnation, the zeolite powder is put into a calcination furnace for high-temperature treatment. The temperature is first increased to 180°C at a rate of 2.5°C / min, and kept at 180°C for 40 minutes. Then the temperature is increased to 370°C at a rate of 3.2°C / min, and kept at 370°C for 2.5 hours. After the heat-keeping treatment is completed, it is cooled to room temperature naturally to obtain 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 with 93g of modified liquid, raise the temperature to 62°C, stir for 34min, control the stirring speed at 365rpm, stir evenly, then cool to 45°C at a rate of 0.5°C / min, add 1.2g KH560 and 0.6g hexadecyltrimethoxysilane, continue stirring for 2.5h, control the stirring speed at 290rpm, after stirring, filter, wash and dry to prepare secondary modified zeolite powder. The modifying liquid is composed of a 35 wt % ethanol solution, coconut acid diethanolamide, and sodium lauryl sulfate, and the mass ratio of the 35 wt % ethanol solution, coconut acid diethanolamide, and sodium lauryl sulfate is 97:1.2:0.8. (3) Modified β-cyclodextrin 35g of beta-cyclodextrin was added to 200g of absolute ethanol, and 1.7g of polyvinylpyrrolidone and 2.0g of polyethylene glycol 200 were added and ball-milled at a temperature of 56°C for 20 minutes at a rotation speed of 352 rpm. After the ball-milling was completed, 2.6g of gamma-aminopropylmethyldiethyloxysilane was added and ball-milling was continued at a temperature of 128 rpm for 30 minutes. After the ball-milling was completed, the temperature was raised to 66°C and the mixture was stirred for 3.0 hours. After the stirring was completed, the mixture was allowed to cool to room temperature, washed, and dried to obtain modified beta-cyclodextrin. (4) Mixture 20g of modified beta-cyclodextrin was added to 130g of dimethylformamide, followed by the addition of 3.7g of secondary modified zeolite powder and 2.4g of sodium dodecylbenzenesulfonate. The temperature was raised to 87°C and ultrasonic treatment was carried out for 15 minutes with an ultrasonic power of 48W and an ultrasonic frequency of 36kHz. After the ultrasonic treatment, the mixture was stirred at a speed of 204rpm for 2.7 hours. After the stirring was completed, the mixture was washed and dried to prepare primary molecular nests. (5) Crosslinking Add 14mL of acetic acid solution to 0.5g of chitosan and stir evenly. Then add 0.8g of primary molecular nests and stir for 15min. Then, raise the temperature to 67℃, add 3.4mL of glutaraldehyde solution and ultrasonicate. The ultrasonic time is 20min, the ultrasonic frequency is 36kHz, and the ultrasonic power is 47W. After the ultrasonic treatment, the mixture is stirred at 67℃ for 2.0h. The stirring speed is 205rpm. After the stirring is completed, the mixture is cooled to room temperature, washed with acetone three times, and then vacuum freeze-dried. The freezing temperature is -45℃, the freezing time is 20h, and the vacuum is 32Pa. After drying, the molecular nest carrier is obtained. The deacetylation degree of the chitosan is 91.2% and the 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. Support Mix the molecular nest carrier with 8 times the volume of deionized water, add propylene glycol fatty acid ester, raise the temperature to 48°C, stir for 27 minutes, then add the biologically active substance, stir for 2.2 hours, the stirring speed is 175 rpm, and after stirring, let stand for 6.5 hours, after leaving, filter and dry to prepare functional molecular nest. The mass ratio of the deionized water, propylene glycol fatty acid ester, and bioactive substance was 96:1.3:8.7.

[0020] 4.Preparation of functional impregnation agent Add liquid paraffin and carboxymethyl cellulose to deionized water and stir evenly. Then, raise the temperature to 46°C, add functional molecular nests and silica sol, and continue stirring for 35 minutes at a stirring speed of 458 rpm. After stirring is complete, the functional impregnating agent is prepared. The mass ratio of the deionized water, liquid paraffin, carboxymethyl cellulose, functional molecule nests and silica sol was 110:2.5:8.3:11:9.0.

[0021] 5. Impregnation 200g of OSB laminate was placed in a sealed container, and then 7 times its volume of functional impregnating agent and 8.3g of isooctanol polyoxyethylene ether were added. Nitrogen was then passed through, the pressure was raised to 0.8MPa, the impregnation temperature was controlled at 55°C, and the impregnation time was 4.5 hours. After impregnation was complete, the container was placed in a 30°C environment and ventilated and dried for 12 hours to produce an anti-mold and deodorizing OSB laminate containing bioactive substances.

[0022] <Example 2> 1. Biologically active substance preparation The plant material was washed and dried to a moisture content of 1.3 wt%, then crushed in an airflow mill to prepare a powder. The particle size of the powder was controlled to 180 nm. The powder was added to a 5-fold volume of ethanol solution, the stirring speed was controlled to 190 rpm, and the temperature was raised to 56°C at a rate of 3.5°C / min. The mixture was stirred for 2.4 hours. After the stirring was completed, microwave-ultrasonic extraction was performed, with the microwave power controlled to 474W and the microwave frequency controlled to 1950MHz. The ultrasonic frequency was 30kHz, the ultrasonic power was 354W, and the microwave-ultrasonic extraction time was 3.0min. After the microwave-ultrasonic extraction was completed, the temperature was raised to 64℃ and kept at 64℃ for 1.3h. After the keeping at 64℃, the extract was filtered and placed in a vacuum environment. The vacuum was controlled to 0.03MPa and kept at 72℃ until it was concentrated to 28% of its original volume. Finally, it was sprayed and dried to pulverize the particles to a diameter of 245nm, thereby obtaining the bioactive substance. The plant is Equisetum arvense, The volume concentration of the ethanol solution is 68%.

[0023] 2. Molecular Nest Carrier Preparation (1) Primary modified zeolite powder The zeolite powder is impregnated in a 5-fold volume of sodium hydroxide solution, the impregnation temperature is 63°C, and the impregnation time is 52 minutes. After the impregnation is completed, it is filtered, washed, and dried to obtain the impregnated zeolite powder. After the impregnation, the zeolite powder is put into a calcination furnace for high-temperature treatment. The temperature is first increased to 176°C at a rate of 2.3°C / min, and kept at 176°C for 37 minutes. Then the temperature is increased to 362°C at a rate of 3.0°C / min, and kept at 362°C for 2.4 hours. After the keeping-up treatment, it is naturally cooled to room temperature to obtain 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 with 90g of modified liquid, raise the temperature to 60°C, stir for 31min, control the stirring speed at 357rpm, stir evenly, then cool to 42°C at a rate of 0.4°C / min, add 1.0g KH560 and 0.5g hexadecyltrimethoxysilane, continue stirring for 2.4h, control the stirring speed at 278rpm, filter, wash and dry to prepare secondary modified zeolite powder. The modifying liquid is composed of a 33 wt % ethanol solution, coconut acid diethanolamide, and sodium lauryl sulfate, and the mass ratio of the 33 wt % ethanol solution, coconut acid diethanolamide, and sodium lauryl sulfate is 95:1.0:0.7. (3) Modified β-cyclodextrin 34g of beta-cyclodextrin was added to 194g of absolute ethanol, and 1.6g of polyvinylpyrrolidone and 1.8g of polyethylene glycol 200 were added and ball-milled at a ball-milling temperature of 53°C for 17 minutes at a ball-milling speed of 344 rpm. After the ball-milling was completed, 2.5g of gamma-aminopropylmethyldiethyloxysilane was added and ball-milling was continued at a ball-milling time of 27 minutes at a ball-milling speed of 123 rpm. After the ball-milling was completed, the temperature was raised to 64°C and the mixture was stirred for 2.8 hours. After the stirring was completed, the mixture was allowed to cool to room temperature, washed, and dried to obtain modified beta-cyclodextrin. (4) Mixture 18g of modified beta-cyclodextrin was added to 125g of dimethylformamide, followed by the addition of 3.6g of secondary modified zeolite powder and 2.2g of sodium dodecylbenzenesulfonate. The temperature was raised to 85°C and ultrasonicated for 13 minutes, with an ultrasonic power of 44W and an ultrasonic frequency of 33kHz. After the ultrasonic treatment, the mixture was stirred at 198rpm for 2.6 hours. After the stirring was completed, the mixture was washed and dried to prepare primary molecular nests. (5) Crosslinking Add 13mL of acetic acid solution to 0.4g of chitosan and stir evenly. Then add 0.7g of primary molecular nests and stir for 13min. Then, raise the temperature to 66℃, add 3.2mL of glutaraldehyde solution and ultrasonicate. The ultrasonic time is 18min, the ultrasonic frequency is 35kHz, and the ultrasonic power is 45W. After the ultrasonic treatment, the mixture is stirred at 66℃ for 1.9h. The stirring speed is 200rpm. After the stirring is completed, the mixture is cooled to room temperature, washed with acetone three times, and then vacuum freeze-dried. The freezing temperature is -47℃, the freezing time is 18h, and the vacuum is 30Pa. After drying, the molecular nest carrier is obtained. The deacetylation degree of the chitosan is 91.0% and the 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. Support Mix the molecular nest carrier with 7 times the volume of deionized water, add propylene glycol fatty acid ester, raise the temperature to 45°C, stir for 23 minutes, then add the biologically active substance, stir for 2.0 hours, the stirring speed is 172 rpm, and after stirring, let stand for 6.3 hours, after leaving, filter and dry to prepare functional molecular nest. The mass ratio of the deionized water, propylene glycol fatty acid ester, and bioactive substance was 94:1.1:8.6.

[0025] 4.Preparation of functional impregnation agent Add liquid paraffin and carboxymethyl cellulose to deionized water and stir evenly. Then, raise the temperature to 44°C, add functional molecular nests and silica sol, and continue stirring for 32 minutes at a stirring speed of 454 rpm. After stirring is complete, the functional impregnating agent is prepared. The mass ratio of the deionized water, liquid paraffin, carboxymethyl cellulose, functional molecule nests and silica sol was 107:2.4:8.1:10:8.7.

[0026] 5. Impregnation 190g of OSB laminate was placed in a sealed container, and then 6 times its volume of functional impregnating agent and 8.2g of isooctanol polyoxyethylene ether were passed through. Nitrogen was passed through, the pressure was raised to 0.7MPa, the impregnation temperature was controlled at 53°C, and the impregnation time was 4.2 hours. After impregnation was complete, the container was placed in an environment of 28°C and ventilated and dried for 11 hours to produce an anti-mold and deodorizing OSB laminate containing bioactive substances.

[0027] Example 3 1. Biologically active substance preparation The plant material was washed and dried to a moisture content of 1.7 wt%, then crushed in an airflow mill to prepare a powder. The particle size of the powder was controlled to 220 nm. The powder was added to a 7-fold volume of ethanol solution, the stirring speed was controlled to 210 rpm, and the temperature was raised while stirring. The temperature was raised to 60°C at a rate of 4.1°C / min and stirred for 2.6 hours. After stirring, microwave-ultrasonic extraction was performed, with the microwave power controlled to 485W and the microwave frequency controlled to 2050MHz. The ultrasonic frequency was 34kHz, the ultrasonic power was 364W, and the microwave-ultrasonic extraction time was 3.4min. After the microwave-ultrasonic extraction was completed, the temperature was raised to 67℃ and kept at 40°C for 1.7h. After the keeping at 40°C, the extract was filtered and placed in a vacuum environment. The vacuum was controlled to 0.05MPa and kept at 76℃ until it was concentrated to 32% of its original volume. Finally, it was sprayed and dried to pulverize the particles to a diameter of 255nm, thereby obtaining the bioactive substance. the plant is a balsam camphor tree, The volume concentration of the ethanol solution is 72%.

[0028] 2. Molecular Nest Carrier Preparation (1) Primary modified zeolite powder The zeolite powder is impregnated in a 7-fold volume of sodium hydroxide solution, the impregnation temperature is 67°C, and the impregnation time is 58 minutes. After the impregnation is completed, it is filtered, washed, and dried to obtain the impregnated zeolite powder. After the impregnation, the zeolite powder is put into a calcination furnace for high-temperature treatment. It is first heated to 185°C at a rate of 2.8°C / min, kept at 185°C for 42 minutes, then heated to 376°C at a rate of 3.5°C / min, and kept at 376°C for 2.6 hours. After the keeping-up treatment, it is cooled to room temperature naturally to obtain 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 with 97g of modified liquid, raise the temperature to 64°C, stir for 37min, control the stirring speed at 370rpm, stir evenly, then cool to 48°C at a rate of 0.6°C / min, add 1.4g KH560 and 0.7g hexadecyltrimethoxysilane, continue stirring for 2.6h, control the stirring speed at 300rpm, after stirring, filter, wash and dry to prepare secondary modified zeolite powder. The modifying liquid is composed of a 36 wt % ethanol solution, coconut acid diethanolamide, and sodium lauryl sulfate, and the mass ratio of the 36 wt % ethanol solution, coconut acid diethanolamide, and sodium lauryl sulfate is 100:1.5:0.9. (3) Modified β-cyclodextrin 36g of beta-cyclodextrin was added to 205g of absolute ethanol, and 1.8g of polyvinylpyrrolidone and 2.2g of polyethylene glycol 200 were added and ball-milled at a temperature of 58°C for 22 minutes at a rotation speed of 357 rpm. After the ball-milling was completed, 2.7g of gamma-aminopropylmethyldiethyloxysilane was added and ball-milling was continued at a temperature of 133 rpm for 32 minutes. After the ball-milling was completed, the temperature was raised to 68°C and the mixture was stirred for 3.2 hours. After the stirring was completed, the mixture was allowed to cool to room temperature, washed, and dried to obtain modified beta-cyclodextrin. (4) Mixture 22g of modified beta-cyclodextrin was added to 136g of dimethylformamide, followed by the addition of 3.8g of secondary modified zeolite powder and 2.5g of sodium dodecylbenzenesulfonate. The temperature was raised to 88°C and ultrasonic treatment was carried out for 17 minutes, with an ultrasonic power of 51W and an ultrasonic frequency of 38kHz. After the ultrasonic treatment, the mixture was stirred at a speed of 211rpm for 2.8 hours. After the stirring was completed, the mixture was washed and dried to prepare primary molecular nests. (5) Crosslinking 0.6g chitosan is added with 17mL of acetic acid solution and stirred evenly. Then, 0.9g of primary molecular nest is added and stirred for 17min. The temperature is raised to 68℃, 3.6mL of glutaraldehyde solution is added and ultrasonicated. The ultrasonic time is 22min, the ultrasonic frequency is 37kHz, and the ultrasonic power is 50W. After the ultrasonication is completed, the mixture is stirred at 68℃ for 2.2h. The stirring speed is 208rpm. After the stirring is completed, the mixture is cooled to room temperature, washed with acetone three times, and then vacuum freeze-dried. The freezing temperature is -42℃, the freezing time is 23h, and the vacuum is 35Pa. After drying, the molecular nest carrier is prepared. The deacetylation degree of the chitosan is 91.5% and the 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. Support Mix the molecular nest carrier with 9 times the volume of deionized water, add propylene glycol fatty acid ester, raise the temperature to 50°C, stir for 29 minutes, then add the biologically active substance, stir for 2.3 hours, the stirring speed is 180 rpm, and after stirring, let stand for 6.7 hours, after leaving, filter and dry to prepare functional molecular nest. The mass ratio of the deionized water, propylene glycol fatty acid ester, and bioactive substance was 98:1.4:8.8.

[0030] 4.Preparation of functional impregnation agent Add liquid paraffin and carboxymethyl cellulose to deionized water and stir evenly. Then, raise the temperature to 48°C, add functional molecular nests and silica sol, and continue stirring for 37 minutes at a stirring speed of 461 rpm. After stirring is complete, the functional impregnating agent is prepared. The mass ratio of the deionized water, liquid paraffin, carboxymethyl cellulose, functional molecule nests and silica sol was 114:2.6:8.5:13:9.2.

[0031] 5. Impregnation 210g of OSB laminate was placed in a sealed container, and then 8 times its volume of functional impregnating agent and 8.5g of isooctanol polyoxyethylene ether were passed through. Nitrogen was passed through, the pressure was raised to 0.9MPa, the impregnation temperature was controlled at 57°C, and the impregnation time was 4.6 hours. After impregnation was complete, the container was placed in a 32°C environment and ventilated and dried for 14 hours to produce an anti-mold and deodorizing OSB laminate containing bioactive substances.

[0032] <Comparative Example 1> Based on Example 1, the following changes were made: (1) The first modified zeolite powder and the second modified zeolite powder process are omitted, and in the mixing process, the second modified zeolite powder is replaced with an equal amount of untreated zeolite powder; (2) In the modified β-cyclodextrin process, polyvinylpyrrolidone and polyethylene glycol 200 were replaced with an equal amount of absolute ethanol; The other operations are the same.

[0033] <Comparative Example 2> Based on Example 1, the following changes were made: (1) In the secondary modified zeolite powder process, the cocoyl diethanolamide and sodium lauryl sulfate in the modified liquid were replaced with an equal amount of 35 wt% ethanol solution; (2) The cross-linking step is omitted, and in the loading step, the molecular nest carrier is replaced with an equal amount of primary molecular nest; The other operations are the same.

[0034] Performance Detection The performance of the antifungal and deodorizing OSB laminates containing the bioactive substances prepared in Examples 1 to 3 and Comparative Examples 1 to 3 was examined, and the results are as follows: (1) Antibacterial performance JPEG2026004189000001.jpg44170(2) Anti-mold performance JPEG2026004189000002.jpg14170(3) Deodorizing performance JPEG2026004189000003.jpg15170(4) Mechanical performance JPEG2026004189000004.jpg44170(5) Aging resistance performance The products prepared in Examples 1 to 3 and Comparative Examples 1 and 2 were left to stand in an environment at a temperature of 46°C and a humidity of 70%, for 7 days, and after the end of the standing period, they were exposed to ultraviolet light at an intensity of 760 W / m 2 The product was left in the above environment for 7 days, and the above counted as one cycle. After 10 cycles, the product performance was again checked, and the results were as follows: JPEG2026004189000005.jpg59170

[0035] The present invention modifies zeolite powder, and the zeolite powder after treatment with the modification liquid has good dispersibility. It is then treated with kH560 and 0.6g hexadecyltrimethoxysilane. The hexadecyltrimethoxysilane improves the waterproofing performance of OSB boards. The kH560 provides epoxy groups on the surface of the zeolite powder. β-cyclodextrin is then modified, and amino groups are grafted onto the surface of the β-cyclodextrin. A mixing process is then carried out to prepare zeolite powder whose surface is modified with β-cyclodextrin. Glutamate is then added. Using aldehyde as a crosslinking agent, chitosan is crosslinked with zeolite powder whose surface is modified with β-cyclodextrin, resulting in a strong bond between the β-cyclodextrin, zeolite powder and chitosan, a stable structure, good bioactive substance carrying effect, good sustained release performance, strong impregnation and penetration effect on OSB laminate, uniform impregnation, homogeneous and stable components of OSB laminate, long-term maintenance of antibacterial, deodorizing and antifungal performance of OSB laminate, good mechanical strengthening effect, and improved aging resistance of OSB laminate.

[0036] Unless otherwise specified, all percentages used in the present invention are by mass.

[0037] Finally, the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. The present invention will be described in detail with reference to the above embodiments, but it should be noted that those skilled in the art can still modify the technical solutions described in the above embodiments or equivalently replace some technical features. Any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and principle of the present invention shall all fall within the protection scope of the present invention.

Claims

1. A method for preparing an anti-mold and deodorizing OSB laminate containing a bioactive substance, the method comprising the steps of preparing a bioactive substance, preparing a molecular nest carrier, supporting the bioactive substance, preparing a functional impregnating agent, and impregnating the functional impregnating agent; The step of preparing the molecular nest carrier includes a step of mixing and crosslinking a primary modified zeolite powder, a secondary modified sub-zeolite powder, and a modified β-cyclodextrin; The process of the primary modified zeolite powder is as follows: the zeolite powder is impregnated in a 5-fold volume of sodium hydroxide solution, the impregnation temperature is 63-67°C, and the impregnation time is 52-58 minutes; after the impregnation is completed, the impregnated zeolite powder is filtered, washed, and dried to obtain the impregnated zeolite powder; the impregnated zeolite powder is put into a calcination furnace for high-temperature treatment, firstly, the temperature is increased to 176-185°C at a rate of 2.3-2.8°C / min, and the temperature is maintained at 176-185°C for 37-42 minutes; then, the temperature is increased to 362-376°C at a rate of 3.0-3.5°C / min, and the temperature is maintained at 362-376°C for 2.4-2.6 hours; after the temperature maintenance, the zeolite powder is naturally cooled to room temperature to obtain the primary modified zeolite powder; The process of the second modified zeolite powder is as follows: mix the first modified zeolite powder with the modified liquid, raise the temperature to 60-64°C, stir for 31-37 minutes, control the stirring speed at 357-370 rpm, stir uniformly, then cool to 42-48°C at a rate of 0.4-0.6°C / min, add KH560 and hexadecyltrimethoxysilane, continue stirring for 2.4-2.6 hours, control the stirring speed at 278-300 rpm, and after stirring, filter, wash and dry to prepare the second modified zeolite powder; The modifying liquid is composed of a 33 to 36 wt % ethanol solution, coconut acid diethanolamide, and sodium lauryl sulfate, The modification process of the modified β-cyclodextrin is as follows: β-cyclodextrin is placed in absolute ethanol, polyvinylpyrrolidone and polyethylene glycol 200 are added, and the mixture is subjected to a ball milling treatment at a ball mill temperature of 53-58°C, a ball milling time of 17-22 min, and a ball mill rotation speed of 344-357 rpm; after the completion of the ball milling treatment, γ-aminopropylmethyldiethyloxysilane is added and the ball milling treatment is continued at a ball milling time of 27-32 min, and a ball mill rotation speed of 123-133 rpm; after the completion of the ball milling treatment, the temperature is raised to 64-68°C, and the mixture is reacted with stirring for 2.8-3.2 hours; after the completion of the stirring treatment, the mixture is allowed to cool to room temperature, washed, and dried to obtain the modified β-cyclodextrin; In the mixing step, the modified β-cyclodextrin is put into dimethylformamide, and then the secondary modified zeolite powder and sodium dodecylbenzenesulfonate are added. The temperature is raised to 85-88°C, and ultrasonic treatment is carried out. The ultrasonic time is 13-17 minutes, the ultrasonic power is 44-51W, and the ultrasonic frequency is 33-38kHz. After the ultrasonic treatment is completed, the mixture is stirred. The stirring speed is controlled to 198-211 rpm, and the stirring time is 2.6-2.8 hours. After the stirring is completed, the mixture is washed and dried to prepare the primary molecular nest. The crosslinking step comprises adding an acetic acid solution to chitosan and stirring evenly, followed by adding primary molecular nests, stirring for 13-17 minutes, raising the temperature to 66-68°C, adding glutaraldehyde solution, and ultrasonicating. The ultrasonic time is 18-22 minutes, the ultrasonic frequency is 35-37 kHz, and the ultrasonic power is 45-50 W. After the ultrasonic treatment is completed, the mixture is stirred at 66-68°C for 1.9-2.2 hours at a stirring speed of 200-208 rpm. After the stirring is completed, the mixture is allowed to cool to room temperature, washed three times with acetone, and then vacuum freeze-dried at a freezing temperature of -47 to -42°C, for 18-23 hours, and at a vacuum of 30-35 Pa. After drying, the molecular nest carrier is obtained.

2. In the step of the 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 to 32%, In the step of producing the secondary modified zeolite powder, the mass ratio of the 33 to 36 wt% ethanol solution, cocoyl diethanolamide, and sodium lauryl sulfate in the modified liquid is 95 to 100:1.0 to 1.5:0.7 to 0.9; The method for preparing an anti-mold and deodorizing OSB laminate containing a biologically active substance according to claim 1, characterized in that the mass ratio of the primary modified zeolite powder, the modifying liquid, KH560 and hexadecyltrimethoxysilane is 16-18:90-97:1.0-1.4:0.5-0.

7.

3. 2. The method for preparing an anti-mold and deodorizing OSB laminate containing a biologically active substance according to claim 1, wherein in the modified β-cyclodextrin step, the mass ratio of the 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. 2. The method for preparing an anti-mold and deodorizing OSB laminate containing a biologically active substance according to claim 1, wherein 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.

5. In the crosslinking step, the deacetylation degree 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-volume ratio of the chitosan to the acetic acid solution is 0.4-0.6 g:13-17 mL; The mass concentration of the glutaraldehyde solution is 47 to 51%; The volume ratio of the acetic acid solution to the glutaraldehyde solution is 13-17:3.2-3.6; The method for preparing an anti-mold and deodorizing OSB laminate containing a biologically active substance according to claim 1, characterized in that the mass ratio of chitosan to primary molecular nests is 0.4-0.6:0.7-0.

9.

6. The bioactive substance preparation process involves washing the plant material, drying it to a moisture content of 1.3-1.7 wt%, and then pulverizing it in an airflow mill to prepare a powder. The particle size of the powder is controlled to 180-220 nm. The powder is added to a 5-7-fold volume of ethanol solution, and the stirring speed is controlled to 190-210 rpm. The temperature is raised while stirring, and the temperature is raised to 56-60°C at a rate of 3.5-4.1°C / min. The mixture is stirred for 2.4-2.6 hours. After the stirring is complete, microwave-ultrasonic extraction is performed, with a microwave power of 474-485W and a microwave frequency of 1950-2000W. The microwave-ultrasonic extraction is carried out using a microwave-ultrasonic frequency of 50 MHz, an ultrasonic frequency of 30-34 kHz, and an ultrasonic power of 354-364 W. The microwave-ultrasonic extraction time is 3.0-3.4 min. After the microwave-ultrasonic extraction is completed, the temperature is raised to 64-67°C and kept at that temperature for 1.3-1.7 hours. After the keeping temperature is completed, the extract is filtered and placed in a vacuum environment, the vacuum degree is controlled to 0.03-0.05 MPa, and the extract is kept at 72-76°C until it is concentrated to 28-32% of its original volume. Finally, the extract is spray-dried and crushed to a particle size of 245-255 nm, thereby preparing the bioactive substance. the plant is either horsetail, pine needles, balsam camphor tree or a mixed plant; The mixed plant is a mixture of horsetail pine needles and balsam camphor tree, and the mass ratio of the horsetail pine needles to the balsam camphor tree is 1:1; 2. The method for preparing an OSB laminate containing a bioactive substance, which has anti-mold and deodorizing properties, according to claim 1, wherein the volume concentration of the ethanol solution is 68-72%.

7. The loading process is as follows: mix the molecular nest carrier with 7-9 times the volume of deionized water, add propylene glycol fatty acid ester, raise the temperature to 45-50°C, stir for 23-29 minutes, add the biologically active substance, stir for 2.0-2.3 hours, the stirring speed is 172-180 rpm, and after stirring, let stand for 6.3-6.7 hours, filter and dry to prepare functional molecular nests; 2. The method for preparing an anti-mold and deodorizing OSB laminate containing a biologically active substance according to claim 1, wherein the mass ratio of the deionized water, the propylene glycol fatty acid ester, and the biologically active substance is 94-98:1.1-1.4:8.6-8.

8.

8. The process of preparing the functional impregnating agent is as follows: add liquid paraffin and carboxymethyl cellulose to deionized water, stir uniformly, then raise the temperature to 44-48°C, add functional molecular nests and silica sol, and continue stirring for 32-37 minutes, with a stirring speed of 454-461 rpm. After stirring is completed, the functional impregnating agent is prepared. The method for preparing an anti-mold and deodorizing OSB laminate containing a biologically active substance according to claim 1, characterized in that the mass ratio of the deionized water, liquid paraffin, carboxymethyl cellulose, functional molecular nests 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 the volume of a functional impregnating agent and isooctanol polyoxyethylene ether through it, then passing nitrogen through it, raising 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 is complete, the OSB 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 biologically active substance.

2. The method for preparing an anti-mold and deodorizing OSB laminate containing a biologically active substance according to claim 1, wherein the mass ratio of the OSB laminate to isooctanol polyoxyethylene ether is 190-210:8.2-8.

5.

10. An anti-mold and deodorizing OSB laminate containing a biologically active substance, prepared by the method for preparing an anti-mold and deodorizing OSB laminate containing a biologically active substance according to any one of claims 1 to 9.

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