Osb facing panel modified with bioactive ingredients and its production process

Abstract

The application provides a production process of an OSB veneer modified by a bioactive ingredient, and the production process comprises the following steps: preparing an OSB substrate, preparing an impregnated paper, and a pressing step; the step of preparing the impregnated paper comprises the following steps: preparing a solution containing the bioactive ingredient, preparing microcapsules, preparing glue, and impregnating; the step of preparing the microcapsules is as follows: the solution containing the bioactive ingredient is mixed with monoglyceride and palm oil, then a wall material is added, the stirring time is controlled to be 47-53 min, the stirring temperature is controlled to be 58-62 DEG C, after the stirring is completed, the mixture is immediately subjected to freezing treatment at-16 to-12 DEG C, the freezing treatment time is controlled to be 26-30 min, and then drying is performed to obtain the microcapsules containing the bioactive ingredient. The OSB veneer prepared by the application has good antibacterial, mildewproof and antiviral performances, excellent mechanical properties and good antioxidant performance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of OSB veneer, and particularly relates to an OSB veneer modified by using active ingredients and a production process thereof. BACKGROUND

[0002] Veneer, full name decorative veneer plywood, is a kind of surface material for indoor decoration or furniture manufacturing, which is made by adhering natural wood or technology wood veneer to the surface of plywood and then hot pressing.

[0003] With the improvement of people's living standards, people's requirements for environmental protection, antibacterial, antiviral, mildew-proof and other properties are increasing in the process of home decoration, and healthy and environmentally friendly decorative boards have become a popular trend in the home decoration field.

[0004] In the field of OSB veneer, the prior art usually adds bioactive ingredients with antibacterial, mildew-proof, antiviral and other functions to the raw materials to improve the antibacterial, mildew-proof and antiviral properties, but the bioactive ingredients will be lost in the subsequent processing process, thereby affecting the antibacterial, mildew-proof and antiviral properties, which cannot meet the use requirements.

[0005] In order to reduce the loss of bioactive ingredients in the processing process and ensure the antibacterial, mildew-proof and antiviral properties, the prior art adds functional agents in the form of microcapsules, but the addition of such macromolecules will affect the mechanical properties of the OSB veneer, and the OSB veneer prepared by the prior art has poor antioxidant properties, and the mechanical properties decrease significantly after oxidation, which seriously affects the service life.

[0006] Therefore, the bioactive ingredient modified OSB veneer and the production process thereof prepared by the prior art have the following problems:

[0007] 1. Poor antibacterial, mildew-proof and antiviral properties;

[0008] 2. While improving the antibacterial, mildew-proof and antiviral properties, the mechanical properties are reduced;

[0009] 3. Poor antioxidant capacity, and the mechanical properties decrease significantly after oxidation. SUMMARY

[0010] In view of the technical problems of the prior art, the present application provides an OSB veneer modified by using bioactive ingredients and a production process thereof, which simultaneously solves the following technical problems:

[0011] 1. Good antibacterial, mildew-proof and antiviral properties;

[0012] 2. While improving the antibacterial, mildew-proof and antiviral properties, the mechanical properties are enhanced;

[0013] 3. Excellent antioxidant capacity, high retention rate of mechanical properties and antibacterial properties after oxidation.

[0014] To solve the above technical problems, the present application adopts the following technical solutions:

[0015] 1. Preparation of OSB board

[0016] (1) Modified zeolite powder

[0017] The zeolite powder is subjected to pulse current treatment, the treatment time is 42-48s, the current density is 137-146A / mm 2 , the pulse frequency is 13-16Hz, and the voltage is 3.7-4.9V, and the preliminary modified zeolite powder is prepared after the pulse treatment is completed;

[0018] The zeolite powder has a particle size of 85-95nm, a SiO2 mass content of 59.8-61.2%, and an Al2O3 mass content of 10.3-11.3%;

[0019] The preliminary modified zeolite powder is subjected to ball milling treatment in a ball milling device together with deionized water, sodium carboxymethyl cellulose, and cocamide, the ball milling time is controlled to be 32-48min, the ball milling speed is 196-224rpm, the ball milling temperature is 94-98℃, then aluminum chloride and oleic acid are added, and the temperature is lowered to 49-55℃ at a rate of 0.3-0.5℃ / min, and the ball milling is continued for 25-29min, after the ball milling is completed, the temperature is naturally restored to room temperature, and then dried to obtain the modified zeolite powder;

[0020] The mass ratio of the preliminary modified zeolite powder, deionized water, sodium carboxymethyl cellulose, cocamide, aluminum chloride, and oleic acid is 12-16:60-66:2.2.7:0.9-1.1:3.2-3.6:1.0-1.4;

[0021] (2) Loading

[0022] The artemisia extract is mixed with deionized water at a mixing temperature of 43-47℃, and then the modified zeolite powder and dimethyl silicone oil are added after the mixture is uniformly mixed, the temperature is raised to 60-68℃, and the mixture is stirred for 13-17min, and then dried to obtain artemisia modified particles;

[0023] The mass ratio of the artemisia extract, deionized water, modified zeolite powder, and dimethyl silicone oil is 3.8-4.2:35-39:6.0-6.4:1.0-1.2;

[0024] (3) Preparation of adhesive

[0025] The deionized water, artemisia modified particles, MDI glue, acacia gum and paraffin are mixed and placed in a ball milling device for ball milling treatment, the ball milling time is 30-34 min, the ball milling temperature is 6.2-6.6℃, after the ball milling, citric acid and triethylene diamine are added, and after uniform mixing, microwave treatment is carried out, the microwave time is 2.7-3.5 min, the microwave frequency is 16-20 kHz, the microwave power is 210-222 W, and after the microwave is finished, the adhesive is prepared;

[0026] The mass ratio of the deionized water, artemisia modified particles, MDI glue, acacia gum, paraffin, citric acid and triethylene diamine is 48-52:4.6-5.0:10-14:3.4-3.6:1.8-2.2:1.4-1.6:0.1-0.3;

[0027] (4) Preparation of plate

[0028] a. Preparation of shavings

[0029] High-quality poplar is selected, and a long wood shaving machine is used to shave the wood along the wood fiber direction to obtain thin long strip-shaped shavings, wherein the length is 108-112 mm, the width is 16-18 mm, and the thickness is 0.5-0.7 mm;

[0030] b. Drying

[0031] The shavings are dried by using a single-channel rotary drum dryer, the inlet temperature of the dryer is 398-402℃, the outlet temperature is 117-123℃, the moisture content is controlled to be 1.8-2.2%, and the dried shavings are obtained;

[0032] c. Gluing

[0033] The dried shavings are screened, and the adhesive is applied by using a gas-free atomization method to obtain the glued shavings;

[0034] The addition amount of the adhesive is 4.8-5.2% of the mass of the shavings;

[0035] d. Paving

[0036] The glued shavings are arranged longitudinally along the fiber direction of the shavings to form a surface layer, and the core layer of shavings is arranged in a vertical direction to the surface layer to form a three-layer structure of the oriented shaving board;

[0037] e. Hot pressing

[0038] The three-layer structure oriented strand board is once hot-pressed, the thickness gauge is 11-13mm, the hot-pressing time is 22-26s, the temperature is 214-218℃, the surface pressure is 3.4-3.6MPa, after the first hot-pressing, the second hot-pressing is carried out, the thickness gauge is 14-16mm, the hot-pressing time is 94-96s, the temperature is 200-202℃, the surface pressure is 2.4-2.6MPa, the OSB board is prepared after the second hot-pressing.

[0039] 2. Preparing the impregnated paper

[0040] (1) Preparing the solution containing bioactive ingredients

[0041] The bioactive ingredients are mixed with deionized water, heated to 60-64℃, stirred uniformly, and then reduced to room temperature, pentaerythritol, lecithin and castor oil are added, mixed uniformly, and then treated by low temperature plasma, the treatment time is 10-14s, the treatment intensity is 217-243W, the treatment frequency is 6.2-6.6kHz, the treatment temperature is 2.0-2.2℃, after the low temperature plasma treatment, the solution containing bioactive ingredients is prepared;

[0042] The bioactive ingredients are one of tea extract, liquorice extract and Chinese waxleaf tree extract;

[0043] The particle size of the bioactive ingredients is 106-114nm;

[0044] The mass ratio of the bioactive ingredients, deionized water, pentaerythritol, lecithin and castor oil is 4-6:57-64:2.0-2.2:1.1-1.3:0.9-1.1;

[0045] (2) Preparing the microcapsule

[0046] The solution containing bioactive ingredients is mixed with monoglyceride, palm oil, then wall material is added, the stirring time is controlled to be 47-53min, the stirring temperature is 58-62℃, after stirring, it is immediately placed in-16~-12℃ for freezing treatment, the freezing treatment time is 26-30min, after the freezing treatment, drying is carried out, the microcapsule containing bioactive ingredients is prepared;

[0047] The mass ratio of the solution containing bioactive ingredients, monoglyceride, palm oil and wall material is 110-118:1.0-1.4:1.4-1.6:13.0-15.0;

[0048] The preparation method of the wall material is as follows: mixing deionized water, gelatin and β-cyclodextrin, then placing in a closed container, vacuumizing the closed container, controlling the vacuum degree to be 0.04-0.06 MPa, introducing nitrogen to increase the pressure to 0.25-0.29 MPa, controlling the temperature to be 21-25℃, then adding chitosan solution, increasing the temperature to 48-54℃, closed treatment for 1.1-1.3 h, after the closed treatment, adding lauric acid and alkyl polyglycoside, stirring uniformly, then drying to obtain the wall material;

[0049] The mass ratio of the deionized water, gelatin, β-cyclodextrin, chitosan solution, lauric acid and alkyl polyglycoside is 125-135:6.4-6.6:7.6-8.0:5.5-5.7:2.0-2.2:3.4-3.6;

[0050] The mass concentration of the chitosan solution is 9.4-10.6%;

[0051] (3) Glue preparation

[0052] Mixing deionized water, melamine glue, microcapsules containing bioactive ingredients, PMDI glue, magnesium hydroxide, epoxy amine, sodium alkyl sulfonate, Tween 80 and lignin sulfonate to obtain a sizing agent;

[0053] The mass ratio of the deionized water, melamine glue, microcapsules containing bioactive ingredients, PMDI glue, magnesium hydroxide, epoxy amine, sodium alkyl sulfonate, Tween 80 and lignin sulfonate is 52-56:28.0-29.0:4.0-4.4:0.7-0.9:2.3-2.7:1.2-1.4:0.6-0.8:2.3-2.5:1.4-1.6;

[0054] (4) Impregnation

[0055] Impregnating the plain base paper in the sizing agent, the impregnation temperature is 32-36℃, the impregnation time is 23-27 min, then increasing the temperature to 40-44℃ at a rate of 0.3-0.5℃ / min, the impregnation time is 28-32 min, ultraviolet-ultrasonic treatment is carried out at the same time, the ultraviolet wavelength is 210-218 nm, the ultrasonic frequency is 29-33 kHz, the ultrasonic power is 185-193 W, after the ultraviolet-ultrasonic treatment, drying to a moisture content of 2.7-2.9% to obtain the impregnated paper;

[0056] The mass ratio of the plain base paper and the sizing agent is 1:3.1-3.3.

[0057] 3. Pressing

[0058] The impregnated paper is pasted to the OSB base plate, one cold pressing is carried out, the temperature is normal temperature, the pressure is 0.7-0.9 MPa, after one cold pressing, one hot pressing is carried out, the temperature is 122-126 DEG C, the pressure is 1.4-1.6 MPa, after one hot pressing, it is placed at 68-72 DEG C and is placed for 2.4-2.6 h, after static setting, two cold pressings are carried out, the temperature is normal temperature, the pressure is 0.7-0.9 MPa, after two cold pressings, two hot pressings are carried out, the temperature is 115-119 DEG C, the pressure is 1.7-1.9 MPa, after two hot pressings, surface modification, sanding, drying and other treatments are carried out to obtain the modified OSB veneer.

[0059] Compared with the prior art, the present application has the following beneficial effects:

[0060] 1. The OSB veneer modified by using the bioactive ingredient has a bacteria inhibition rate of 95.4-96.8% for staphylococcus aureus and a bacteria inhibition rate of 97.0-98.5% for escherichia coli;

[0061] 2. The OSB veneer modified by using the bioactive ingredient has a mildew-proof grade of 0;

[0062] 3. The OSB veneer modified by using the bioactive ingredient has a tensile strength of 6.8-7.4 MPa, a compressive strength of 15.4-16.9 MPa and an impact strength of 55.9-57.8 kJ / m 2 ;

[0063] After being placed in an environment with an ultraviolet intensity of 800 W / m 2 for 15 days, the tensile strength is 6.5-7.2 MPa, the compressive strength is 14.6-16.3 MPa, and the impact strength is 54.2-56.8 kJ / m 2 . DETAILED DESCRIPTION

[0064] In order to more clearly understand the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described below.

[0065] Example 1

[0066] 1. Preparation of OSB base plate

[0067] (1) Modified zeolite powder

[0068] The zeolite powder is subjected to pulse current treatment, the treatment time is 45 s, the current density is 142 A / mm 2 , the pulse frequency is 14 Hz, and the voltage is 4.3 V, and the preliminary modified zeolite powder is prepared after pulse treatment.

[0069] The zeolite powder has a particle size of 90 nm, a mass content of SiO2 of 60.4%, and a mass content of Al2O3 of 10.8%;

[0070] The preliminary modified zeolite powder, deionized water, sodium carboxymethyl cellulose, and coconut amide are placed in a ball milling device for ball milling treatment, the ball milling time is controlled to be 40 min, the ball milling rotation speed is 210 rpm, and the ball milling temperature is 96 DEG C, then aluminum chloride and oleic acid are added, and the temperature is lowered to 52 DEG C at a rate of 0.4 DEG C / min, and the ball milling is continued for 27 min, after the ball milling is completed, the temperature is naturally restored to room temperature, and drying is performed to obtain the modified zeolite powder;

[0071] The mass ratio of the preliminary modified zeolite powder, deionized water, sodium carboxymethyl cellulose, coconut amide, aluminum chloride, and oleic acid is 14:63:2.5:1.0:3.4:1.2;

[0072] (2) loading

[0073] The wormwood extract and deionized water are mixed at a mixing temperature of 45 DEG C, the modified zeolite powder and dimethyl silicone oil are added after the mixture is uniformly mixed, the temperature is raised to 64 DEG C, stirring is performed for 15 min, and drying is performed to obtain the wormwood modified granules;

[0074] The mass ratio of the wormwood extract, deionized water, modified zeolite powder, and dimethyl silicone oil is 4:37:6.2:1.1;

[0075] (3) preparation of the adhesive

[0076] The deionized water, wormwood modified granules, MDI glue, gum arabic, and paraffin are mixed and placed in a ball milling device for ball milling treatment, the ball milling time is 32 min, the ball milling temperature is 6.4 DEG C, after the ball milling is completed, citric acid and triethylene diamine are added, the mixture is uniformly mixed, and microwave treatment is performed, the microwave time is 3.1 min, the microwave frequency is 18 kHz, the microwave power is 216 W, and after the microwave treatment is completed, the adhesive is obtained;

[0077] The mass ratio of the deionized water, wormwood modified granules, MDI glue, gum arabic, paraffin, citric acid, and triethylene diamine is 50:4.8:12:3.5:2.0:1.5:0.2;

[0078] (4) preparation of the board

[0079] a. preparation of the shavings

[0080] High-quality poplar wood is selected, and the wood is flaked along the wood fiber direction by using a long wood flaking machine to obtain thin and long strip-shaped shavings, wherein the length is 110 mm, the width is 17 mm, and the thickness is 0.6 mm;

[0081] b. drying

[0082] The shavings are dried by using a single-channel rotary dryer, the inlet temperature of the dryer is 400℃, the outlet temperature is 120℃, and the moisture content is controlled at 2%, to obtain dried shavings;

[0083] c. Gluing

[0084] The dried shavings are screened, and an adhesive is applied by using a gas-free atomization method to obtain glued shavings;

[0085] The amount of the adhesive added is 5% of the mass of the shavings;

[0086] d. Laying

[0087] The glued shavings are arranged longitudinally along the fiber direction of the shavings to form a surface layer, and the core layer of shavings is arranged in a perpendicular direction to the surface layer, forming a three-layer structure of oriented shavings board;

[0088] e. Hot pressing

[0089] The three-layer structure of oriented shavings board is subjected to primary hot pressing with a thickness gauge of 12mm, a hot pressing time of 24s, a temperature of 216℃, and a surface pressure of 3.5MPa. After primary hot pressing, secondary hot pressing is performed with a thickness gauge of 15mm, a hot pressing time of 95s, a temperature of 201℃, and a surface pressure of 2.5MPa, to obtain an OSB board.

[0090] 2. Preparation of impregnated paper

[0091] (1) Preparation of tea extract-containing solution

[0092] The tea extract is mixed with deionized water, heated to 62℃, stirred uniformly, and then cooled to room temperature. Pentaerythritol, lecithin, and castor oil are added and mixed uniformly, and then subjected to low-temperature plasma treatment. The treatment time is 12s, the treatment intensity is 230W, the treatment frequency is 6.4kHz, and the treatment temperature is 2.1℃. After low-temperature plasma treatment, a tea extract-containing solution is prepared;

[0093] The particle size of the tea extract is 110nm;

[0094] The mass ratio of the tea extract, deionized water, pentaerythritol, lecithin, and castor oil is 5:60:2.1:1.2:1.0;

[0095] (2) Preparation of microcapsules

[0096] The tea extract-containing solution is mixed with monoglyceride and palm oil, and then wall material is added. The stirring time is controlled at 50min, and the stirring temperature is 60℃. After stirring, the mixture is immediately subjected to freezing treatment at -14℃ for 28min, and then dried to obtain tea extract-containing microcapsules.

[0097] The mass ratio of the solution containing tea leaf extract, monoglyceride, palm oil and wall material is 114:1.2:1.5:14.3;

[0098] The preparation method of the wall material is as follows: mixing deionized water, gelatin and β-cyclodextrin, then placing in a closed container, vacuumizing the closed container, controlling the vacuum degree to be 0.05 MPa, introducing nitrogen to increase the pressure to 0.27 MPa, controlling the temperature to be 23℃, then adding chitosan solution, increasing the temperature to 51℃, and sealing for 1.2 h, after the sealing treatment, adding lauric acid and alkyl glycoside, stirring uniformly, and drying to obtain the wall material;

[0099] The mass ratio of the deionized water, gelatin, β-cyclodextrin, chitosan solution, lauric acid and alkyl glycoside is 130:6.5:7.8:5.6:2.1:3.5;

[0100] The mass concentration of the chitosan solution is 10%;

[0101] (3) Glue preparation

[0102] Stirring uniformly the deionized water, melamine glue, tea leaf extract-containing microcapsule, PMDI glue, magnesium hydroxide, epoxy amine, sodium alkyl sulfonate, Tween 80 and lignin sulfonate to obtain the sizing agent;

[0103] The mass ratio of the deionized water, melamine glue, tea leaf extract-containing microcapsule, PMDI glue, magnesium hydroxide, epoxy amine, sodium alkyl sulfonate, Tween 80 and lignin sulfonate is 54:28.5:4.2:0.8:2.5:1.3:0.7:2.4:1.5;

[0104] (4) Impregnation

[0105] Impregnating the plain base paper in the sizing agent, the impregnation temperature is 34℃, the impregnation time is 25 min, then increasing the temperature to 42℃ at a rate of 0.4℃ / min, the impregnation time is 30 min, ultraviolet-ultrasonic treatment is carried out at the same time, the ultraviolet wavelength is 214 nm, the ultrasonic frequency is 31 kHz, and the ultrasonic power is 189 W, after the ultraviolet-ultrasonic treatment, drying to a water content of 2.8% to obtain the impregnated paper;

[0106] The mass ratio of the plain base paper and the sizing agent is 1:3.2.

[0107] 3. Pressing

[0108] The impregnated paper is pasted on the OSB substrate, and one cold pressing is carried out at room temperature and a pressure of 0.8 MPa, and then one hot pressing is carried out at a temperature of 124 DEG C and a pressure of 1.5 MPa, and then the product is placed at 70 DEG C for 2.5 h after one hot pressing, and then two cold pressings are carried out at room temperature and a pressure of 0.8 MPa, and then two hot pressings are carried out at a temperature of 117 DEG C and a pressure of 1.8 MPa, and then the product is subjected to surface modification, sanding, drying and other treatments to obtain the modified OSB veneer.

[0109] Example 2

[0110] 1. Preparation of OSB substrate

[0111] (1) Modified zeolite powder

[0112] The zeolite powder is subjected to pulse current treatment, the treatment time is 42 s, the current density is 137 A / mm 2 , the pulse frequency is 13 Hz, and the voltage is 3.7 V, and then the preliminary modified zeolite powder is prepared after the pulse treatment is completed;

[0113] The zeolite powder has a particle size of 85 nm, a SiO2 mass content of 59.8%, and an Al2O3 mass content of 10.3%;

[0114] The preliminary modified zeolite powder, deionized water, sodium carboxymethyl cellulose, and coconut amide are placed in a ball milling device for ball milling treatment, the ball milling time is controlled to be 32 min, the ball milling speed is 224 rpm, and the ball milling temperature is 94 DEG C, then aluminum chloride and oleic acid are added, and the temperature is lowered to 49 DEG C at a rate of 0.3 DEG C / min, and the ball milling is continued for 25 min, then the temperature is naturally restored to room temperature after the ball milling is completed, and then drying is carried out to obtain the modified zeolite powder;

[0115] The mass ratio of the preliminary modified zeolite powder, deionized water, sodium carboxymethyl cellulose, coconut amide, aluminum chloride, and oleic acid is 12:60:2.3:0.9:3.2:1.0;

[0116] (2) Loading

[0117] The wormwood extract is mixed with deionized water at a mixing temperature of 43 DEG C, and then the modified zeolite powder and dimethyl silicone oil are added after the mixture is uniformly mixed, the temperature is raised to 60 DEG C, stirring is carried out for 13 min, and then drying is carried out to obtain the wormwood modified particles;

[0118] The mass ratio of the wormwood extract, deionized water, modified zeolite powder, and dimethyl silicone oil is 3.8:35:6.0:1.0;

[0119] (3) Preparation of adhesive

[0120] The deionized water, artemisia modified particles, MDI glue, gum arabic and paraffin wax are mixed and placed in a ball milling device for ball milling treatment, the ball milling time is 30 min, the ball milling temperature is 6.2 DEG C, after the ball milling, citric acid and triethylene diamine are added, and after uniform mixing, microwave treatment is carried out, the microwave time is 2.7 min, the microwave frequency is 16 kHz, the microwave power is 210 W, and after the microwave is completed, the adhesive is prepared;

[0121] The mass ratio of the deionized water, artemisia modified particles, MDI glue, gum arabic, paraffin wax, citric acid and triethylene diamine is 48:4.6:10:3.4:1.8:1.4:0.1;

[0122] (4) Preparation of plate

[0123] a. Preparation of shavings

[0124] High-quality poplar is selected, and the wood is flaked along the wood fiber direction by using a long wood flaking machine to obtain thin long strip-shaped shavings, wherein the length is 108 mm, the width is 16 mm, and the thickness is 0.5 mm;

[0125] b. Drying

[0126] The shavings are dried by using a single-channel rotary drum dryer, the inlet temperature of the dryer is 398 DEG C, the outlet temperature is 117 DEG C, the moisture content is controlled to be 1.8%, and the dried shavings are obtained;

[0127] c. Gluing

[0128] The dried shavings are screened, and the adhesive is applied by using a gas-free atomization method to obtain the glued shavings;

[0129] The added amount of the adhesive is 4.8% of the mass of the shavings;

[0130] d. Paving

[0131] The glued shavings are arranged and paved into a surface layer along the fiber direction of the shavings, and the core layer of shavings is arranged in a vertical direction to the surface layer to form a three-layer structure of the oriented shavings board;

[0132] e. Hot pressing

[0133] The three-layer structure of the oriented shavings board is once hot pressed, the thickness gauge is 11 mm, the hot pressing time is 22 s, the temperature is 214 DEG C, and the surface pressure is 3.4 MPa, and after the first hot pressing is completed, the second hot pressing is carried out, the thickness gauge is 14 mm, the hot pressing time is 94 s, the temperature is 200 DEG C, and the surface pressure is 2.4 MPa, and the OSB board is prepared after the second hot pressing is completed.

[0134] 2. Preparation of impregnated paper

[0135] (1) Preparation of licorice extract-containing solution

[0136] The licorice extract is mixed with deionized water, heated to 60℃, stirred uniformly, and then lowered to room temperature. Pentaerythritol, lecithin and castor oil are added, mixed uniformly, and then subjected to low-temperature plasma treatment. The treatment time is 10s, the treatment intensity is 217W, the treatment frequency is 6.2kHz, and the treatment temperature is 2.0℃. After low-temperature plasma treatment, the licorice extract-containing solution is prepared;

[0137] The particle size of the licorice extract is 106nm;

[0138] The mass ratio of the licorice extract, deionized water, pentaerythritol, lecithin and castor oil is 4:57:2.0:1.1:0.9;

[0139] (2) Preparation of microcapsules

[0140] The licorice extract-containing solution is mixed with monoglyceride and palm oil, and then wall material is added. The stirring time is controlled at 47min and the stirring temperature is 58℃. After stirring, it is immediately frozen at-16℃ for 26min, and then dried to prepare the licorice extract-containing microcapsules;

[0141] The mass ratio of the licorice extract-containing solution, monoglyceride, palm oil and wall material is 110:1.0:1.4:13.0;

[0142] The preparation method of the wall material is as follows: deionized water, gelatin and β-cyclodextrin are mixed, then placed in a sealed container, the sealed container is vacuumed to a vacuum degree of 0.04MPa, nitrogen gas is introduced to increase the pressure to 0.25MPa, the temperature is controlled at 21℃, then chitosan solution is added, the temperature is increased to 48℃, and the sealed treatment is carried out for 1.1h. After the sealed treatment, lauric acid and alkyl glycoside are added, stirred uniformly, and then dried to prepare the wall material;

[0143] The mass ratio of the deionized water, gelatin, β-cyclodextrin, chitosan solution, lauric acid and alkyl glycoside is 125:6.4:7.6:5.5:2.0:3.4;

[0144] The mass concentration of the chitosan solution is 9.4%;

[0145] (3) Glue preparation

[0146] The deionized water, melamine glue, licorice extract-containing microcapsules, PMDI glue, magnesium hydroxide, epoxy amine, sodium alkyl sulfonate, Tween 80 and lignosulfonate are stirred uniformly to prepare a sizing agent;

[0147] The mass ratio of the deionized water, melamine glue, microcapsules containing licorice extract, PMDI glue, magnesium hydroxide, epoxy amine, sodium alkyl sulfonate, Tween 80, lignin sulfonate is 52:28.0:4.0:0.7:2.3:1.2:0.6:2.3:1.4;

[0148] (4) Immersion

[0149] The plain base paper is immersed in the sizing agent, the immersion temperature is 32℃, the immersion time is 23min, then the temperature is raised to 40℃ at a rate of 0.3℃ / min, the immersion time is 28min, ultraviolet-ultrasonic treatment is carried out at the same time, the ultraviolet wavelength is 210nm, the ultrasonic frequency is 29kHz, the ultrasonic power is 185W, after the ultraviolet-ultrasonic treatment, drying is carried out until the water content is 2.7%, and the immersed paper is prepared;

[0150] The mass ratio of the plain base paper and the sizing agent is 1:3.1.

[0151] 3. Pressing

[0152] The immersed paper is attached to the OSB base board, one-time cold pressing is carried out, the temperature is room temperature, and the pressure is 0.7MPa, after the one-time cold pressing, one-time hot pressing is carried out, the temperature is 122℃, and the pressure is 1.4MPa, after the one-time hot pressing, the temperature is 68℃, and the pressure is 2.4h, after the static treatment, two-time cold pressing is carried out, the temperature is room temperature, and the pressure is 0.7MPa, after the two-time cold pressing, two-time hot pressing is carried out, the temperature is 115℃, and the pressure is 1.7MPa, after the two-time hot pressing, surface modification, sanding, drying and other treatments are carried out, and the modified OSB veneered board is prepared.

[0153] Example 3

[0154] 1. Preparation of OSB base board

[0155] (1) Modified zeolite powder

[0156] The zeolite powder is subjected to pulse current treatment, the treatment time is 48s, the current density is 146A / mm 2 , the pulse frequency is 16Hz, and the voltage is 4.9V, and the preliminary modified zeolite powder is prepared after the pulse treatment;

[0157] The zeolite powder has a particle size of 95nm, a SiO2 mass content of 61.2%, and an Al2O3 mass content of 11.3%;

[0158] The preliminary modified zeolite powder is mixed with deionized water, sodium carboxymethyl cellulose, cocamide in a ball milling device for ball milling treatment, the ball milling time is controlled to be 48 min, the ball milling speed is 196 rpm, and the ball milling temperature is 98℃, then aluminum chloride and oleic acid are added, and the temperature is lowered to 55℃ at a rate of 0.5℃ / min, and the ball milling is continued for 29 min, after the ball milling is completed, the temperature is naturally restored to room temperature, and the modified zeolite powder is obtained after drying;

[0159] The mass ratio of the preliminary modified zeolite powder, deionized water, sodium carboxymethyl cellulose, cocamide, aluminum chloride and oleic acid is 16:66:2.7:1.1:3.6:1.4;

[0160] (2) Loading

[0161] The wormwood extract is mixed with deionized water at a mixing temperature of 47℃, and then the modified zeolite powder and dimethyl silicone oil are added after uniform mixing, the temperature is raised to 68℃, and stirring is performed for 17 min, and the wormwood modified granules are obtained after drying;

[0162] The mass ratio of the wormwood extract, deionized water, modified zeolite powder and dimethyl silicone oil is 4.2:39:6.4:1.2;

[0163] (3) Preparation of adhesive

[0164] The deionized water, wormwood modified granules, MDI glue, gum arabic and paraffin are mixed and placed in a ball milling device for ball milling treatment, the ball milling time is 34 min, and the ball milling temperature is 6.6℃, then citric acid and triethylene diamine are added after the ball milling is completed, uniform mixing is performed, and then microwave treatment is performed, the microwave time is 3.5 min, the microwave frequency is 20 kHz, and the microwave power is 222 W, and the adhesive is obtained after the microwave treatment is completed;

[0165] The mass ratio of the deionized water, wormwood modified granules, MDI glue, gum arabic, paraffin, citric acid and triethylene diamine is 52:5.0:14:3.6:2.2:1.6:0.3;

[0166] (4) Preparation of board

[0167] a. Preparation of shavings

[0168] High-quality poplar wood is selected, and the wood is flaked along the wood fiber direction by using a long wood flaking machine to obtain thin and long strip-shaped shavings, wherein the length is 112 mm, the width is 18 mm, and the thickness is 0.7 mm;

[0169] b. Drying

[0170] The shavings are dried by using a single-channel rotary drum dryer, the inlet temperature of the dryer is 402℃, the outlet temperature is 123℃, the water content is controlled to be 2.2%, and the dried shavings are obtained;

[0171] c. Sizing

[0172] The dry shavings are screened, and an adhesive is applied by airless atomization to obtain sized shavings;

[0173] The amount of the adhesive added is 5.2% of the mass of the shavings;

[0174] d. Laying

[0175] The sized shavings are arranged longitudinally along the fiber direction of the shavings to form a surface layer, and the core layer of shavings is arranged in a perpendicular direction to the surface layer to form a three-layer structure of the oriented shaving board;

[0176] e. Hot pressing

[0177] The three-layer structure of the oriented shaving board is subjected to primary hot pressing with a thickness gauge of 13 mm, a hot pressing time of 26 s, a temperature of 218°C, and a surface pressure of 3.6 MPa, and then subjected to secondary hot pressing with a thickness gauge of 16 mm, a hot pressing time of 96 s, a temperature of 202°C, and a surface pressure of 2.6 MPa to obtain an OSB board.

[0178] 2. Preparation of impregnated paper

[0179] (1) Preparation of a solution containing extract of Litsea cubeba

[0180] The extract of Litsea cubeba is mixed with deionized water, heated to 64°C, stirred uniformly, and then lowered to room temperature. Pentaerythritol, lecithin, and castor oil are added and mixed uniformly, and then subjected to low-temperature plasma treatment with a treatment time of 14 s, a treatment intensity of 243 W, a treatment frequency of 6.6 kHz, and a treatment temperature of 2.2°C. After the low-temperature plasma treatment, a solution containing the extract of Litsea cubeba is obtained.

[0181] The particle size of the extract of Litsea cubeba is 114 nm;

[0182] The mass ratio of the extract of Litsea cubeba, deionized water, pentaerythritol, lecithin, and castor oil is 6:64:2.2:1.3:1.1;

[0183] (2) Preparation of microcapsules

[0184] The solution containing the extract of Litsea cubeba is mixed with monoglyceride and palm oil, and then wall material is added. The stirring time is controlled to be 53 min, and the stirring temperature is controlled to be 62°C. After stirring, the mixture is immediately subjected to freezing treatment at -12°C for 30 min, and then dried to obtain microcapsules containing the extract of Litsea cubeba.

[0185] The mass ratio of the solution containing the extract of Litsea cubeba, monoglyceride, palm oil, and wall material is 118:1.4:1.6:15.0.

[0186] The preparation method of the wall material is that deionized water, gelatin and β-cyclodextrin are mixed, then placed in a closed container, the closed container is vacuumized, the vacuum degree is controlled to be 0.06 MPa, nitrogen is introduced to increase the pressure to 0.29 MPa, the temperature is controlled to be 25℃, then chitosan solution is added, the temperature is increased to 54℃, and the closed treatment is carried out for 1.3 h, after the closed treatment is completed, lauric acid and alkyl polyglycoside are added, stirred uniformly, and then dried to obtain the wall material.

[0187] The mass ratio of the deionized water, gelatin, β-cyclodextrin, chitosan solution, lauric acid and alkyl polyglycoside is 135:6.6:8.0:5.7:2.2:3.6.

[0188] The mass concentration of the chitosan solution is 10.6%.

[0189] (3) Glue preparation

[0190] The deionized water, melamine glue, microcapsules containing extracts of Melia toosendan, PMDI glue, magnesium hydroxide, epoxy amine, sodium alkyl sulfonate, Tween 80 and lignin sulfonate are stirred uniformly to obtain a sizing agent.

[0191] The mass ratio of the deionized water, melamine glue, microcapsules containing extracts of Melia toosendan, PMDI glue, magnesium hydroxide, epoxy amine, sodium alkyl sulfonate, Tween 80 and lignin sulfonate is 56:29.0:4.4:0.9:2.7:1.4:0.8:2.5:1.6.

[0192] (4) Impregnation

[0193] The plain base paper is impregnated in the sizing agent, the impregnation temperature is 36℃, the impregnation time is 27 min, then the temperature is increased to 44℃ at a rate of 0.5℃ / min, the impregnation time is 32 min, ultraviolet-ultrasonic treatment is carried out at the same time, the ultraviolet wavelength is 218 nm, the ultrasonic frequency is 33 kHz, the ultrasonic power is 193 W, after the ultraviolet-ultrasonic treatment is completed, the water content is dried to be 2.9%, and the impregnated paper is obtained.

[0194] The mass ratio of the plain base paper and the sizing agent is 1:3.3.

[0195] 3. Pressing

[0196] The impregnated paper is pasted on the OSB substrate, and one cold pressing is carried out at room temperature and a pressure of 0.9 MPa. After the first cold pressing, one hot pressing is carried out at a temperature of 126 DEG C and a pressure of 1.6 MPa. After the first hot pressing, the product is placed at 72 DEG C for 2.6 h. After the standing, second cold pressing is carried out at room temperature and a pressure of 0.9 MPa. After the second cold pressing, second hot pressing is carried out at a temperature of 119 DEG C and a pressure of 1.9 MPa. After the second hot pressing, surface modification, sanding, drying and other treatments are carried out to obtain the modified OSB decorative panel.

[0197] Comparative Example 1

[0198] On the basis of Example 1, the change is that in the process of preparing the OSB substrate, the modification step of the zeolite powder is omitted, and the zeolite powder without any treatment is directly used, and the rest of the operations are the same.

[0199] Comparative Example 2

[0200] On the basis of Example 1, the change is that in the preparation of the adhesive step, deionized water, modified artemisia granules and MDI glue are directly mixed and stirred uniformly to obtain the adhesive; the mass ratio of the deionized water, the modified artemisia granules and the MDI glue is 50:4.8:12, and the rest of the operations are the same.

[0201] Comparative Example 3

[0202] On the basis of Example 1, the change is that in the preparation of the microcapsule step, the freezing treatment step is omitted, and the wall material is a chitosan solution with a mass concentration of 10%, and the rest of the operations are the same.

[0203] Performance detection

[0204] The products prepared in Examples 1-3 and Comparative Examples 1-2 are subjected to performance testing, and the details are as follows:

[0205] 1. Antibacterial, mildewproof and antiviral performance

[0206]

[0207] 2. Mechanical performance

[0208]

[0209] 3. Antioxidant performance

[0210] The products prepared in Examples 1-3 and Comparative Examples 1-3 are placed in an environment with an ultraviolet intensity of 800 W / m 2 for 15 days, and the mechanical performance is measured as follows:

[0211]

[0212] Unless otherwise specified, the proportions described in the present application are mass proportions, and the percentages described are mass percentages.

[0213] Finally, it should be noted that the above description is only for the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that modifications can be made to the technical solutions described in the foregoing embodiments, or some of the technical features thereof can be replaced by equivalent features, without departing from the spirit and principle of the present application. Any modifications, equivalent replacements, improvements, and the like made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A production process of OSB veneer modified with bioactive ingredients, characterized in that, the production process comprises preparing an OSB substrate, preparing an impregnated paper, and a pressing step; the preparation of the OSB substrate comprises modifying zeolite powder, loading, preparing an adhesive, and preparing a board; the preparation of the impregnated paper comprises preparing a solution containing bioactive ingredients, preparing microcapsules, compounding, and impregnating; The modification zeolite powder step is to pulse current treat the zeolite powder, the treatment time is 42-48s, the current density is 137-146A / mm 2 , the pulse frequency is 13-16Hz, the voltage is 3.7-4.9V, and the initial modification zeolite powder is prepared after the pulse treatment; the initial modification zeolite powder, deionized water, sodium carboxymethyl cellulose and cocamide are placed in a ball milling device for ball milling treatment, the ball milling time is controlled to be 32-48min, the ball milling rotating speed is 196-224rpm, the ball milling temperature is 94-98℃, then aluminum chloride and oleic acid are added, and the temperature is lowered to 49-55℃ at a rate of 0.3-0.5℃ / min, the ball milling is continuously carried out for 25-29min, after the ball milling, the temperature is naturally recovered to room temperature, and the modified zeolite powder is prepared after drying. the loading step is to mix artemisia extract with deionized water, the mixing temperature is 43-47℃, after uniform mixing, add modified zeolite powder and dimethyl silicone oil, raise the temperature to 60-68℃, stir for 13-17min, and dry to obtain artemisia modified particles; the preparation of the adhesive step is to mix deionized water, artemisia modified particles, MDI glue, arabic gum and paraffin wax, and put them into a ball milling device for ball milling treatment, the ball milling time is 30-34min, the ball milling temperature is 6.2-6.6℃, after ball milling, add citric acid and triethylene diamine, mix uniformly, then microwave, the microwave time is 2.7-3.5min, the microwave frequency is 16-20kHz, the microwave power is 210-222W, and the adhesive is prepared after microwave; the preparation of the solution containing bioactive ingredients step is to mix bioactive ingredients with deionized water, heat to 60-64℃, stir uniformly, then reduce to room temperature, add pentaerythritol, lecithin and castor oil, mix uniformly, then low temperature plasma treatment, the treatment time is 10-14s, the treatment intensity is 217-243W, the treatment frequency is 6.2-6.6kHz, the treatment temperature is 2.0-2.2℃, and the solution containing bioactive ingredients is prepared after low temperature plasma treatment; the bioactive ingredients are one of tea extract, liquorice extract and Chinese wax extract; the particle size of the bioactive ingredients is 106-114nm; the mass ratio of the bioactive ingredients, deionized water, pentaerythritol, lecithin and castor oil is 4-6:57-64:2.0-2.2:1.1-1.3:0.9-1.1; the preparation of the microcapsules step is to mix the solution containing bioactive ingredients with monoglyceride and palm oil, then add wall material, control the stirring time to be 47-53min and the stirring temperature to be 58-62℃, immediately freeze after stirring, freeze for 26-30min, dry after freeze treatment, and prepare the microcapsules containing bioactive ingredients; the preparation method of the wall material is to mix deionized water, gelatin and β-cyclodextrin, then put them into a sealed container, vacuumize the sealed container, control the vacuum degree to be 0.04-0.06MPa, introduce nitrogen to raise the pressure to 0.25-0.29MPa, control the temperature to be 21-25℃, then add chitosan solution, raise the temperature to 48-54℃, seal for 1.1-1.3h, after sealing, add lauric acid and alkyl glycoside, stir uniformly, and dry to prepare the wall material. 2.The production process of OSB veneer modified by bioactive ingredients according to claim 1, wherein, the particle size of the zeolite powder is 85-95nm, the mass content of SiO 2 is 59.8-61.2%, and the mass content of Al 2 O 3 is 10.3-11.3% in the step of modifying the zeolite powder; the mass ratio of the preliminary modified zeolite powder, deionized water, sodium carboxymethyl cellulose, cocamide, aluminum chloride, and oleic acid is 12-16:60-66:2.-2.7:0.9-1.1:3.2-3.6:1.0-1.

4. 3.The production process of OSB veneer modified by bioactive ingredients according to claim 1, wherein, the mass ratio of the wormwood extract, deionized water, modified zeolite powder, and dimethyl silicone oil is 3.8-4.2:35-39:6.0-6.4:1.0-1.2 in the step of loading. 4.The production process of OSB veneer modified by bioactive ingredients according to claim 1, wherein, the mass ratio of the deionized water, wormwood modified particles, MDI glue, gum arabic, paraffin, citric acid, and triethylene diamine is 48-52:4.6-5.0:10-14:3.4-3.6:1.8-2.2:1.4-1.6:0.1-0.3 in the step of preparing the adhesive. 5.The production process of OSB veneer modified by bioactive ingredients according to claim 1, wherein, the mass ratio of the solution containing bioactive ingredients, monoglyceride, palm oil, and wall material is 110-118:1.0-1.4:1.4-1.6:13.0-15.0 in the step of preparing the microcapsule; the mass ratio of the deionized water, gelatin, β-cyclodextrin, chitosan solution, lauric acid, and alkyl glycoside is 125-135:6.4-6.6:7.6-8.0:5.5-5.7:2.0-2.2:3.4-3.6 in the step of preparing the wall material; the mass concentration of the chitosan solution is 9.4-10.6%. 6.The production process of OSB veneer modified by bioactive ingredients according to claim 1, wherein, the glue preparation step is to mix the deionized water, melamine glue, microcapsules containing bioactive ingredients, PMDI glue, magnesium hydroxide, epoxy amine, sodium alkyl sulfonate, Tween 80, and lignosulfonate to prepare the sizing agent; the mass ratio of the deionized water, melamine glue, microcapsules containing bioactive ingredients, PMDI glue, magnesium hydroxide, epoxy amine, sodium alkyl sulfonate, Tween 80, and lignosulfonate is 52-56:28.0-29.0:4.0-4.4:0.7-0.9:2.3-2.7:1.2-1.4:0.6-0.8:2.3-2.5:1.4-1.

6. 7.The production process of OSB veneer modified by bioactive ingredients according to claim 1, wherein, The impregnation step is to immerse the base color raw paper in the sizing agent, the impregnation temperature is 32-36℃, the impregnation time is 23-27min, then the temperature is raised to 40-44℃ at 0.3-0.5℃ / min, the impregnation time is 28-32min, ultraviolet-ultrasonic treatment is carried out at the same time, the ultraviolet wavelength is 210-218nm, the ultrasonic frequency is 29-33kHz, the ultrasonic power is 185-193W, after the ultraviolet-ultrasonic treatment, dry to the moisture content of 2.7-2.9%, and the impregnated paper is obtained; The mass ratio of the base color raw paper to the sizing agent is 1:3.1-3.

3.

8. The production process of the OSB veneer modified by the bioactive ingredient according to claim 1, characterized in that, The pressing step is to paste the impregnated paper on the OSB base plate, carry out the first cold pressing, the temperature is room temperature, the pressure is 0.7-0.9MPa, after the first cold pressing, carry out the first hot pressing, the temperature is 122-126℃, the pressure is 1.4-1.6MPa, after the first hot pressing, place it at 68-72℃ for 2.4-2.6h, after the standing, carry out the second cold pressing, the temperature is room temperature, the pressure is 0.7-0.9MPa, after the second cold pressing, carry out the second hot pressing, the temperature is 115-119℃, the pressure is 1.7-1.9MPa, after the second hot pressing, carry out the surface modification, sanding and drying treatment to obtain the modified OSB veneer.

9. The OSB veneer modified by the bioactive ingredient produced by the production process according to any one of claims 1-8.

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