CN111978660A - Antibiotic mould proof bamboo wood fibre integrated wallboard - Google Patents
Antibiotic mould proof bamboo wood fibre integrated wallboard Download PDFInfo
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- CN111978660A CN111978660A CN202010896064.XA CN202010896064A CN111978660A CN 111978660 A CN111978660 A CN 111978660A CN 202010896064 A CN202010896064 A CN 202010896064A CN 111978660 A CN111978660 A CN 111978660A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C08K2003/2272—Ferric oxide (Fe2O3)
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Abstract
The invention discloses an antibacterial and mildewproof bamboo and wood fiber integrated wallboard which comprises the following raw materials in parts by weight: 50-60 parts of recycled polyvinyl chloride, 5-10 parts of plant fiber, 20-40 parts of glass fiber, 5-15 parts of calcium carbonate, 3-5 parts of stabilizer, 5-7 parts of composite antibacterial agent and 5-10 parts of stearic acid; adding calcium carbonate into a vacuum drying oven for drying, controlling the vacuum degree to be-0.10 MPa, the temperature to be 90-100 ℃, and the drying time to be 4-6h, and uniformly mixing a coupling agent and isopropanol according to the weight ratio of 1: 1 to prepare a mixed solution A; the composite antibacterial agent is a composite antibacterial agent of iron oxide and titanium oxide, wherein the iron oxide is used as a composite phase, the iron oxide can inhibit the crystal grains of the nano titanium dioxide from becoming large at high temperature, and the heat resistance of the prepared composite antibacterial agent can be improved, so that when the composite antibacterial agent is compounded with polyvinyl chloride, the composite antibacterial agent can be stably compounded with the polyvinyl chloride, and the stability of a system is improved.
Description
Technical Field
The invention relates to a wallboard, in particular to an antibacterial and mildewproof bamboo and wood fiber integrated wallboard.
Background
The wallboard not only needs to have the characteristics of firmness, durability and easy cleaning, but also needs to have the characteristics of noise reduction, warm in winter and cool in summer, wear resistance, impact resistance, health, environmental protection, attractiveness and the like. The materials used for manufacturing the wall board are various, such as wood, stone, PVC materials and the like, wherein the wall board made of the PVC materials has great advantages.
PVC is one of the earliest synthetic resins produced in industry, and is one of the three most used plastics in the world due to low price and easily available raw materials. Because of its excellent electrical insulating properties, it is used in the electrical and electronic industries to manufacture plugs, sockets, switches and cables. In daily life, polyvinyl chloride is used to manufacture sandals, raincoats, toys, artificial leather, and the like. Meanwhile, the chemical stability is high, so that the method can be used for manufacturing anti-corrosion pipelines, pipe fittings, oil pipelines, centrifugal pumps, blowers and the like. The PVC hard board is widely used in chemical industry for manufacturing linings of various storage tanks, corrugated boards of buildings, door and window structures, wall decorations and other building materials.
Chinese patent CN111005520A discloses a method for preparing a nano-antibacterial wallboard and the nano-antibacterial wallboard, the method for preparing comprises the following steps: 1) respectively preparing adhesive glue and an antibacterial coating, coating the adhesive glue on one side of facing paper, coating the antibacterial coating on the other side of the facing paper, and drying the facing paper; 2) laying sheet molding compound into a mold, laying dried facing paper on the sheet molding compound in the mold, and integrally molding; and (3) obtaining the wallboard with the surface of the substrate adhered with the facing paper after mould pressing, wherein the antibacterial coating, the adhesive glue and the sheet molding compound comprise the following raw materials: unsaturated polyester resin, a curing agent, a filler and a cross-linking agent, and the antibacterial coating also comprises nano oxide.
Disclosure of Invention
In order to overcome the technical problem, the invention provides an antibacterial and mildewproof bamboo-wood fiber integrated wallboard.
The technical problems to be solved by the invention are as follows:
when the heat treatment temperature is too high, the nano titanium dioxide is converted into a rutile structure, and crystal grains become large, so that the temperature resistance of the nano titanium dioxide is poor, and the nano titanium dioxide is poor when being used as an antibacterial material.
The purpose of the invention can be realized by the following technical scheme:
an antibacterial and mildew-proof bamboo wood fiber integrated wallboard comprises the following raw materials in parts by weight: 50-60 parts of recycled polyvinyl chloride, 5-10 parts of plant fiber, 20-40 parts of glass fiber, 5-15 parts of calcium carbonate, 3-5 parts of stabilizer, 5-7 parts of composite antibacterial agent and 5-10 parts of stearic acid;
the antibacterial and mildewproof bamboo-wood fiber integrated wallboard is prepared by the following method:
s1, adding calcium carbonate into a vacuum drying box for drying, controlling the vacuum degree to be-0.10 MPa, the temperature to be 90-100 ℃ and the drying time to be 4-6h, uniformly mixing a coupling agent and isopropanol according to the weight ratio of 1: 1 to prepare a mixed solution A, adding the dried calcium carbonate into a mixing machine, dropwise adding the mixed solution A, controlling the dropwise adding time to be 5-6min, mixing at the rotating speed of 100 plus materials and 120r/min while dropwise adding, brushing off the calcium carbonate on the side wall by using a brush after the dropwise adding is finished, mixing at the rotating speed of 450 plus materials and 480r/min for 2min, discharging to prepare the treated calcium carbonate;
step S2, adding the recycled polyvinyl chloride, the treated calcium carbonate and the stearic acid into a mixing machine, blending for 15min at the rotating speed of 600-;
and step S3, transferring the prepared semi-finished product into a vacuum cooling box for shaping and cooling to 35-40 ℃, and then cutting, calendering and pasting films to obtain the antibacterial and mildewproof bamboo-wood fiber integrated wallboard.
And S1, drying and dehydrating the calcium carbonate for 4-6 hours, wherein a large number of hydroxyl groups exist on the surface of the calcium carbonate, the calcium carbonate has strong hydrophilic performance and is easy to agglomerate, so that a coupling agent and isopropanol are mixed according to the weight ratio of 1: 1 to prepare a mixed solution A, and then the mixed solution A is mixed with the calcium carbonate, the coupling agent is grafted on the surface of the calcium carbonate through a covalent bond, the calcium carbonate is difficult to agglomerate, the polyvinyl chloride has high brittleness, and the polyvinyl chloride is blended with the treated calcium carbonate in the step S2, and the calcium carbonate is used as a filler, so that the toughness of the polyvinyl chloride can be enhanced, and the finally prepared wallboard has excellent toughness.
Further, in step S2, the extrusion temperature of the extruder is 150-160 ℃ at the first section of the barrel, 158-165 ℃ at the second section of the barrel, 160-165 ℃ at the third section of the barrel, 165-170 ℃ at the fourth section of the barrel, 175 ℃ at the confluence core and 195-200 ℃ at the die head.
Further, the stabilizer is one or two of an organic tin stabilizer and a calcium-zinc composite stabilizer which are mixed according to any proportion.
Further, the plant fiber is one or more of straw fiber, bamboo fiber and wood fiber which are mixed according to any proportion.
Further, in step S1, the coupling agent is one or two of titanate coupling agent and silane coupling agent, and is mixed according to any proportion.
Further, the composite antibacterial agent is prepared by the following method:
firstly, adding titanium tetrachloride into a sulfuric acid solution with the mass fraction of 10%, magnetically stirring for 15min at the rotating speed of 120r/min to prepare a titanium sulfate solution, then increasing the rotating speed, magnetically stirring at the rotating speed of 280r/min, adding a ferric sulfate solution with the mass fraction of 10% while stirring, heating in a water bath at the temperature of 45-50 ℃ after complete addition, and stirring for 30min to prepare a mixed solution C;
and secondly, adding 10 mass percent ammonia water into the prepared mixed solution C to adjust the pH until the pH is 9.0-9.3, magnetically stirring until white precipitates appear, washing the precipitates with deionized water for three times, replacing the precipitates with glycerol, transferring the precipitates into a 75 ℃ drying box to dry for 4 hours, heating to 90 ℃, preserving the heat for 30 minutes at the temperature, and calcining for 4 hours at 750-800 ℃ to obtain the composite antibacterial agent.
When the heat treatment temperature is too high, the nano titanium dioxide is converted into a rutile structure, and crystal grains become large, so that the temperature resistance of the nano titanium dioxide is poor, when the nano titanium dioxide is used as an antibacterial material, the temperature resistance of the nano titanium dioxide is poor, and when the prepared antibacterial agent is compounded with polyvinyl chloride, the adhesive force is low, so that the system stability is poor, and the nano titanium dioxide cannot be stably compounded with the polyvinyl chloride; the method comprises the steps of mixing a titanium sulfate solution with a 10% ferric sulfate solution in the first step, adjusting the pH value in the second step, and calcining the generated white precipitate at high temperature to prepare the composite antibacterial agent, wherein the composite antibacterial agent is a composite antibacterial agent of iron oxide and titanium oxide, the iron oxide is used as a composite phase, the iron oxide can inhibit the crystal grains of nano titanium dioxide from becoming large at high temperature, and the heat resistance of the prepared composite antibacterial agent can be improved.
Further, in the first step, the ratio of the amounts of the titanium sulfate and the iron sulfate is controlled to 5-6: 2, and the weight ratio of the titanium tetrachloride and the 10% sulfuric acid solution is 1 g: 10-12 mL.
The invention has the beneficial effects that:
(1) the invention relates to an antibacterial mildew-proof bamboo-wood fiber integrated wallboard, which is prepared by recycling polyvinyl chloride, plant fibers, a composite antibacterial agent and other raw materials, wherein the composite antibacterial agent can endow the wallboard with excellent antibacterial performance, calcium carbonate is dried and dehydrated for 4-6h in a step S1 in the preparation process, a large number of hydroxyl groups exist on the surface of the calcium carbonate, the calcium carbonate has strong hydrophilic performance and is easy to agglomerate, so that a coupling agent and isopropanol are mixed according to the weight ratio of 1: 1 to prepare a mixed solution A, and then the mixed solution A is mixed with the calcium carbonate, the coupling agent is grafted on the surface of the calcium carbonate through a covalent bond, the calcium carbonate is difficult to agglomerate, the polyvinyl chloride has high brittleness, the polyvinyl chloride is mixed with the treated calcium carbonate in a step S2, and the calcium carbonate is used as a filler to enhance the toughness of the polyvinyl chloride.
(2) The composite antibacterial agent is prepared, in the preparation process, nano titanium dioxide is converted into a rutile structure when the heat treatment temperature is too high, crystal grains become large, and the temperature resistance of the nano titanium dioxide is poor, so that the nano titanium dioxide is poor when being used as an antibacterial material, and when the prepared antibacterial agent is compounded with polyvinyl chloride, the adhesion is low, so that the system is poor in stability and cannot be stably compounded with the polyvinyl chloride; the method comprises the steps of mixing a titanium sulfate solution with a 10% ferric sulfate solution in the first step, adjusting the pH value in the second step, and calcining the generated white precipitate at high temperature to prepare the composite antibacterial agent, wherein the composite antibacterial agent is a composite antibacterial agent of iron oxide and titanium oxide, the iron oxide is used as a composite phase, the iron oxide can inhibit the crystal grains of nano titanium dioxide from becoming large at high temperature, and the heat resistance of the prepared composite antibacterial agent can be improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An antibacterial and mildew-proof bamboo wood fiber integrated wallboard comprises the following raw materials in parts by weight: 50 parts of recycled polyvinyl chloride, 5 parts of straw fiber, 20 parts of glass fiber, 5 parts of calcium carbonate, 3 parts of organic tin stabilizer, 5 parts of composite antibacterial agent and 5 parts of stearic acid;
the antibacterial and mildewproof bamboo-wood fiber integrated wallboard is prepared by the following method:
step S1, adding calcium carbonate into a vacuum drying oven for drying, controlling the vacuum degree to be-0.10 MPa, the temperature to be 90 ℃ and the drying time to be 4h, uniformly mixing titanate coupling agent and isopropanol according to the weight ratio of 1: 1 to prepare mixed liquid A, adding the dried calcium carbonate into a mixer, dripping the mixed liquid A into the mixer, controlling the dripping time to be 5min, mixing at the rotating speed of 100r/min while dripping, brushing off the calcium carbonate on the side wall by using a brush after dripping is finished, mixing at the rotating speed of 450r/min for 2min, and discharging to prepare the treated calcium carbonate;
step S2, adding the recycled polyvinyl chloride, the treated calcium carbonate and the stearic acid into a mixer, blending for 15min at the rotating speed of 600r/min, controlling the blending temperature to be 100 ℃ to obtain a base material B, adding the straw fiber, the glass fiber, the organic tin stabilizer, the stearic acid and the base material B into the mixer, uniformly mixing at 110 ℃, keeping the temperature for 10min, cooling to 50 ℃, standing for 10h, and extruding by an extruder to obtain a semi-finished product;
and step S3, transferring the prepared semi-finished product into a vacuum cooling box, shaping and cooling to 35 ℃, and then cutting, calendering and pasting films to obtain the antibacterial and mildewproof bamboo-wood fiber integrated wallboard.
The composite antibacterial agent is prepared by the following method:
firstly, adding titanium tetrachloride into a sulfuric acid solution with the mass fraction of 10%, magnetically stirring for 15min at the rotating speed of 120r/min to prepare a titanium sulfate solution, then increasing the rotating speed, magnetically stirring at the rotating speed of 280r/min, adding a ferric sulfate solution with the mass fraction of 10% while stirring, completely adding the titanium sulfate solution and the ferric sulfate solution, heating in a water bath at 45 ℃, stirring for 30min to prepare a mixed solution C, controlling the mass ratio of titanium sulfate to ferric sulfate to be 5: 2, and controlling the weight ratio of titanium tetrachloride to the 10% sulfuric acid solution to be 1 g: 10 mL;
and secondly, adding 10 mass percent ammonia water into the prepared mixed solution C to adjust the pH until the pH is 9.0, magnetically stirring until white precipitate appears, washing the precipitate with deionized water for three times, replacing the precipitate with glycerol, transferring the precipitate into a 75 ℃ drying oven to dry for 4 hours, then heating to 90 ℃, preserving the heat for 30min at the temperature, and then calcining for 4 hours at 750 ℃ to obtain the composite antibacterial agent.
Example 2
An antibacterial and mildew-proof bamboo wood fiber integrated wallboard comprises the following raw materials in parts by weight: 52 parts of recycled polyvinyl chloride, 6 parts of straw fiber, 25 parts of glass fiber, 8 parts of calcium carbonate, 4 parts of organic tin stabilizer, 6 parts of composite antibacterial agent and 6 parts of stearic acid;
the antibacterial and mildewproof bamboo-wood fiber integrated wallboard is prepared by the following method:
step S1, adding calcium carbonate into a vacuum drying oven for drying, controlling the vacuum degree to be-0.10 MPa, the temperature to be 90 ℃ and the drying time to be 4h, uniformly mixing titanate coupling agent and isopropanol according to the weight ratio of 1: 1 to prepare mixed liquid A, adding the dried calcium carbonate into a mixer, dripping the mixed liquid A into the mixer, controlling the dripping time to be 5min, mixing at the rotating speed of 100r/min while dripping, brushing off the calcium carbonate on the side wall by using a brush after dripping is finished, mixing at the rotating speed of 450r/min for 2min, and discharging to prepare the treated calcium carbonate;
step S2, adding the recycled polyvinyl chloride, the treated calcium carbonate and the stearic acid into a mixer, blending for 15min at the rotating speed of 600r/min, controlling the blending temperature to be 100 ℃ to obtain a base material B, adding the straw fiber, the glass fiber, the organic tin stabilizer, the stearic acid and the base material B into the mixer, uniformly mixing at 110 ℃, keeping the temperature for 10min, cooling to 50 ℃, standing for 10h, and extruding by an extruder to obtain a semi-finished product;
and step S3, transferring the prepared semi-finished product into a vacuum cooling box, shaping and cooling to 35 ℃, and then cutting, calendering and pasting films to obtain the antibacterial and mildewproof bamboo-wood fiber integrated wallboard.
The composite antibacterial agent is prepared by the following method:
firstly, adding titanium tetrachloride into a sulfuric acid solution with the mass fraction of 10%, magnetically stirring for 15min at the rotating speed of 120r/min to prepare a titanium sulfate solution, then increasing the rotating speed, magnetically stirring at the rotating speed of 280r/min, adding a ferric sulfate solution with the mass fraction of 10% while stirring, completely adding the titanium sulfate solution and the ferric sulfate solution, heating in a water bath at 45 ℃, stirring for 30min to prepare a mixed solution C, controlling the mass ratio of titanium sulfate to ferric sulfate to be 5: 2, and controlling the weight ratio of titanium tetrachloride to the 10% sulfuric acid solution to be 1 g: 10 mL;
and secondly, adding 10 mass percent ammonia water into the prepared mixed solution C to adjust the pH until the pH is 9.0, magnetically stirring until white precipitate appears, washing the precipitate with deionized water for three times, replacing the precipitate with glycerol, transferring the precipitate into a 75 ℃ drying oven to dry for 4 hours, then heating to 90 ℃, preserving the heat for 30min at the temperature, and then calcining for 4 hours at 750 ℃ to obtain the composite antibacterial agent.
Example 3
An antibacterial and mildew-proof bamboo wood fiber integrated wallboard comprises the following raw materials in parts by weight: 56 parts of recycled polyvinyl chloride, 8 parts of straw fiber, 35 parts of glass fiber, 12 parts of calcium carbonate, 5 parts of organic tin stabilizer, 6 parts of composite antibacterial agent and 8 parts of stearic acid;
the antibacterial and mildewproof bamboo-wood fiber integrated wallboard is prepared by the following method:
step S1, adding calcium carbonate into a vacuum drying oven for drying, controlling the vacuum degree to be-0.10 MPa, the temperature to be 90 ℃ and the drying time to be 4h, uniformly mixing titanate coupling agent and isopropanol according to the weight ratio of 1: 1 to prepare mixed liquid A, adding the dried calcium carbonate into a mixer, dripping the mixed liquid A into the mixer, controlling the dripping time to be 5min, mixing at the rotating speed of 100r/min while dripping, brushing off the calcium carbonate on the side wall by using a brush after dripping is finished, mixing at the rotating speed of 450r/min for 2min, and discharging to prepare the treated calcium carbonate;
step S2, adding the recycled polyvinyl chloride, the treated calcium carbonate and the stearic acid into a mixer, blending for 15min at the rotating speed of 600r/min, controlling the blending temperature to be 100 ℃ to obtain a base material B, adding the straw fiber, the glass fiber, the organic tin stabilizer, the stearic acid and the base material B into the mixer, uniformly mixing at 110 ℃, keeping the temperature for 10min, cooling to 50 ℃, standing for 10h, and extruding by an extruder to obtain a semi-finished product;
and step S3, transferring the prepared semi-finished product into a vacuum cooling box, shaping and cooling to 35 ℃, and then cutting, calendering and pasting films to obtain the antibacterial and mildewproof bamboo-wood fiber integrated wallboard.
The composite antibacterial agent is prepared by the following method:
firstly, adding titanium tetrachloride into a sulfuric acid solution with the mass fraction of 10%, magnetically stirring for 15min at the rotating speed of 120r/min to prepare a titanium sulfate solution, then increasing the rotating speed, magnetically stirring at the rotating speed of 280r/min, adding a ferric sulfate solution with the mass fraction of 10% while stirring, completely adding the titanium sulfate solution and the ferric sulfate solution, heating in a water bath at 45 ℃, stirring for 30min to prepare a mixed solution C, controlling the mass ratio of titanium sulfate to ferric sulfate to be 5: 2, and controlling the weight ratio of titanium tetrachloride to the 10% sulfuric acid solution to be 1 g: 10 mL;
and secondly, adding 10 mass percent ammonia water into the prepared mixed solution C to adjust the pH until the pH is 9.0, magnetically stirring until white precipitate appears, washing the precipitate with deionized water for three times, replacing the precipitate with glycerol, transferring the precipitate into a 75 ℃ drying oven to dry for 4 hours, then heating to 90 ℃, preserving the heat for 30min at the temperature, and then calcining for 4 hours at 750 ℃ to obtain the composite antibacterial agent.
Example 4
An antibacterial and mildew-proof bamboo wood fiber integrated wallboard comprises the following raw materials in parts by weight: 60 parts of recycled polyvinyl chloride, 10 parts of straw fiber, 40 parts of glass fiber, 15 parts of calcium carbonate, 5 parts of organic tin stabilizer, 7 parts of composite antibacterial agent and 10 parts of stearic acid;
the antibacterial and mildewproof bamboo-wood fiber integrated wallboard is prepared by the following method:
step S1, adding calcium carbonate into a vacuum drying oven for drying, controlling the vacuum degree to be-0.10 MPa, the temperature to be 90 ℃ and the drying time to be 4h, uniformly mixing titanate coupling agent and isopropanol according to the weight ratio of 1: 1 to prepare mixed liquid A, adding the dried calcium carbonate into a mixer, dripping the mixed liquid A into the mixer, controlling the dripping time to be 5min, mixing at the rotating speed of 100r/min while dripping, brushing off the calcium carbonate on the side wall by using a brush after dripping is finished, mixing at the rotating speed of 450r/min for 2min, and discharging to prepare the treated calcium carbonate;
step S2, adding the recycled polyvinyl chloride, the treated calcium carbonate and the stearic acid into a mixer, blending for 15min at the rotating speed of 600r/min, controlling the blending temperature to be 100 ℃ to obtain a base material B, adding the straw fiber, the glass fiber, the organic tin stabilizer, the stearic acid and the base material B into the mixer, uniformly mixing at 110 ℃, keeping the temperature for 10min, cooling to 50 ℃, standing for 10h, and extruding by an extruder to obtain a semi-finished product;
and step S3, transferring the prepared semi-finished product into a vacuum cooling box, shaping and cooling to 35 ℃, and then cutting, calendering and pasting films to obtain the antibacterial and mildewproof bamboo-wood fiber integrated wallboard.
The composite antibacterial agent is prepared by the following method:
firstly, adding titanium tetrachloride into a sulfuric acid solution with the mass fraction of 10%, magnetically stirring for 15min at the rotating speed of 120r/min to prepare a titanium sulfate solution, then increasing the rotating speed, magnetically stirring at the rotating speed of 280r/min, adding a ferric sulfate solution with the mass fraction of 10% while stirring, completely adding the titanium sulfate solution and the ferric sulfate solution, heating in a water bath at 45 ℃, stirring for 30min to prepare a mixed solution C, controlling the mass ratio of titanium sulfate to ferric sulfate to be 5: 2, and controlling the weight ratio of titanium tetrachloride to the 10% sulfuric acid solution to be 1 g: 10 mL;
and secondly, adding 10 mass percent ammonia water into the prepared mixed solution C to adjust the pH until the pH is 9.0, magnetically stirring until white precipitate appears, washing the precipitate with deionized water for three times, replacing the precipitate with glycerol, transferring the precipitate into a 75 ℃ drying oven to dry for 4 hours, then heating to 90 ℃, preserving the heat for 30min at the temperature, and then calcining for 4 hours at 750 ℃ to obtain the composite antibacterial agent.
Comparative example 1
This comparative example, which is not treated with calcium carbonate as compared to example 1, was prepared as follows:
step S1, adding the recycled polyvinyl chloride, calcium carbonate and stearic acid into a mixer, blending for 15min at the rotating speed of 600r/min, controlling the blending temperature to be 100 ℃ to obtain a base material B, adding the straw fiber, the glass fiber, the organic tin stabilizer, the stearic acid and the base material B into the mixer, uniformly mixing at 110 ℃, keeping the temperature for 10min, cooling to 50 ℃, standing for 10h, and extruding by an extruder to obtain a semi-finished product;
and step S2, transferring the prepared semi-finished product into a vacuum cooling box, shaping and cooling to 35 ℃, and then cutting, calendering and pasting films to obtain the antibacterial and mildewproof bamboo-wood fiber integrated wallboard.
Comparative example 2
Compared with the example 1, the preparation method of the comparative example is as follows without adding the composite antibacterial agent;
step S1, adding calcium carbonate into a vacuum drying oven for drying, controlling the vacuum degree to be-0.10 MPa, the temperature to be 90 ℃ and the drying time to be 4h, uniformly mixing titanate coupling agent and isopropanol according to the weight ratio of 1: 1 to prepare mixed liquid A, adding the dried calcium carbonate into a mixer, dripping the mixed liquid A into the mixer, controlling the dripping time to be 5min, mixing at the rotating speed of 100r/min while dripping, brushing off the calcium carbonate on the side wall by using a brush after dripping is finished, mixing at the rotating speed of 450r/min for 2min, and discharging to prepare the treated calcium carbonate;
step S2, adding the recycled polyvinyl chloride, the treated calcium carbonate and the stearic acid into a mixer, blending for 15min at the rotating speed of 600r/min, controlling the blending temperature to be 100 ℃ to obtain a base material B, adding the straw fiber, the glass fiber, the organic tin stabilizer, the stearic acid and the base material B into the mixer, uniformly mixing at 110 ℃, keeping the temperature for 10min, cooling to 50 ℃, standing for 10h, and extruding by an extruder to obtain a semi-finished product;
and step S3, transferring the prepared semi-finished product into a vacuum cooling box, shaping and cooling to 35 ℃, and then cutting, calendering and pasting films to obtain the antibacterial and mildewproof bamboo-wood fiber integrated wallboard.
Comparative example 3
This comparative example is an antibiotic integrated wallboard in the market.
The antibacterial ratios, tensile strengths and abrasion amounts of examples 1 to 4 and comparative examples 1 to 3 were measured, and the results are shown in the following table;
the antibacterial rate is as follows: the test was carried out according to the method specified in appendix B of QB/T2591-2003 and the results are as follows:
| the antibacterial rate% | Tensile strength MPa | Amount of abrasion (mg/100r) | |
| Example 1 | 92.3 | 70.1 | 15.3 |
| Example 2 | 93.1 | 69.5 | 15.5 |
| Example 3 | 92.8 | 69.1 | 15.2 |
| Example 4 | 92.5 | 69.3 | 15.3 |
| Comparative example 1 | 88.5 | 58.5 | 16.1 |
| Comparative example 2 | 33.5 | 68.2 | 16.5 |
| Comparative example 3 | 68.5 | 60.1 | 16.2 |
As can be seen from the above table, the antibacterial ratios of examples 1 to 4 were 92.3 to 92.8%, the tensile strengths were 69.1 to 70.1MPa, the abrasion amounts were 15.2 to 15.3mg/100r, the antibacterial ratios of comparative examples 1 to 3 were 33.5 to 88.5%, the tensile strengths were 60.1 to 68.2MPa, and the abrasion amounts were 16.1 to 16.5mg/100 r; therefore, the composite antibacterial agent is a composite antibacterial agent of iron oxide and titanium oxide, wherein the iron oxide is used as a composite phase, the iron oxide can inhibit the crystal grains of the nano titanium dioxide from becoming large at high temperature, and the heat resistance of the prepared composite antibacterial agent can be improved, so that when the composite antibacterial agent is compounded with polyvinyl chloride, the composite antibacterial agent can be stably compounded with the polyvinyl chloride, and the stability of a system is improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (7)
1. The antibacterial and mildew-proof bamboo-wood fiber integrated wallboard is characterized by comprising the following raw materials in parts by weight: 50-60 parts of recycled polyvinyl chloride, 5-10 parts of plant fiber, 20-40 parts of glass fiber, 5-15 parts of calcium carbonate, 3-5 parts of stabilizer, 5-7 parts of composite antibacterial agent and 5-10 parts of stearic acid;
the antibacterial and mildewproof bamboo-wood fiber integrated wallboard is prepared by the following method:
s1, adding calcium carbonate into a vacuum drying box for drying, controlling the vacuum degree to be-0.10 MPa, the temperature to be 90-100 ℃ and the drying time to be 4-6h, uniformly mixing a coupling agent and isopropanol according to the weight ratio of 1: 1 to prepare a mixed solution A, adding the dried calcium carbonate into a mixing machine, dropwise adding the mixed solution A, controlling the dropwise adding time to be 5-6min, mixing at the rotating speed of 100 plus materials and 120r/min while dropwise adding, brushing off the calcium carbonate on the side wall by using a brush after the dropwise adding is finished, mixing at the rotating speed of 450 plus materials and 480r/min for 2min, discharging to prepare the treated calcium carbonate;
step S2, adding the recycled polyvinyl chloride, the treated calcium carbonate and the stearic acid into a mixing machine, blending for 15min at the rotating speed of 600-;
and step S3, transferring the prepared semi-finished product into a vacuum cooling box for shaping and cooling to 35-40 ℃, and then cutting, calendering and pasting films to obtain the antibacterial and mildewproof bamboo-wood fiber integrated wallboard.
And S1, drying and dehydrating the calcium carbonate for 4-6 hours, wherein a large number of hydroxyl groups exist on the surface of the calcium carbonate, the calcium carbonate has strong hydrophilic performance and is easy to agglomerate, so that a coupling agent and isopropanol are mixed according to the weight ratio of 1: 1 to prepare a mixed solution A, and then the mixed solution A is mixed with the calcium carbonate, the coupling agent is grafted on the surface of the calcium carbonate through a covalent bond, the calcium carbonate is difficult to agglomerate, the polyvinyl chloride has high brittleness, and the polyvinyl chloride is blended with the treated calcium carbonate in the step S2, and the calcium carbonate is used as a filler, so that the toughness of the polyvinyl chloride can be enhanced, and the finally prepared wallboard has excellent toughness.
2. The antibacterial and mildewproof bamboo and wood fiber integrated wallboard as claimed in claim 1, wherein in the step S2, the extrusion temperature of the extruder is 150-.
3. The antibacterial and mildewproof bamboo-wood fiber integrated wallboard of claim 1, wherein the stabilizer is one or two of an organic tin stabilizer and a calcium-zinc composite stabilizer which are mixed according to any proportion.
4. The antibacterial and mildewproof bamboo-wood fiber integrated wallboard according to claim 1, wherein the plant fibers are one or a mixture of straw fibers, bamboo fibers and wood fibers in any proportion.
5. The antibacterial and mildewproof bamboo-wood fiber integrated wallboard of claim 1, wherein in the step S1, the coupling agent is one or two of titanate coupling agent and silane coupling agent which are mixed according to any proportion.
6. The antibacterial and mildewproof bamboo-wood fiber integrated wallboard of claim 1, wherein the composite antibacterial agent is prepared by the following method:
firstly, adding titanium tetrachloride into a sulfuric acid solution with the mass fraction of 10%, magnetically stirring for 15min at the rotating speed of 120r/min to prepare a titanium sulfate solution, then increasing the rotating speed, magnetically stirring at the rotating speed of 280r/min, adding a ferric sulfate solution with the mass fraction of 10% while stirring, heating in a water bath at the temperature of 45-50 ℃ after complete addition, and stirring for 30min to prepare a mixed solution C;
and secondly, adding 10 mass percent ammonia water into the prepared mixed solution C to adjust the pH until the pH is 9.0-9.3, magnetically stirring until white precipitates appear, washing the precipitates with deionized water for three times, replacing the precipitates with glycerol, transferring the precipitates into a 75 ℃ drying box to dry for 4 hours, heating to 90 ℃, preserving the heat for 30 minutes at the temperature, and calcining for 4 hours at 750-800 ℃ to obtain the composite antibacterial agent.
When the heat treatment temperature is too high, the nano titanium dioxide is converted into a rutile structure, and crystal grains become large, so that the temperature resistance of the nano titanium dioxide is poor, when the nano titanium dioxide is used as an antibacterial material, the temperature resistance of the nano titanium dioxide is poor, and when the prepared antibacterial agent is compounded with polyvinyl chloride, the adhesive force is low, so that the system stability is poor, and the nano titanium dioxide cannot be stably compounded with the polyvinyl chloride; the method comprises the steps of mixing a titanium sulfate solution with a 10% ferric sulfate solution in the first step, adjusting the pH value in the second step, and calcining the generated white precipitate at high temperature to prepare the composite antibacterial agent, wherein the composite antibacterial agent is a composite antibacterial agent of iron oxide and titanium oxide, the iron oxide is used as a composite phase, the iron oxide can inhibit the crystal grains of nano titanium dioxide from becoming large at high temperature, and the heat resistance of the prepared composite antibacterial agent can be improved.
7. The antibacterial and mildewproof bamboo-wood fiber integrated wallboard of claim 6, wherein in the first step, the weight ratio of titanium sulfate to ferric sulfate is controlled to be 5-6: 2, and the weight ratio of titanium tetrachloride to 10% sulfuric acid solution is 1 g: 10-12 mL.
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| CN117586702A (en) * | 2024-01-19 | 2024-02-23 | 海阳市凌晖包装有限公司 | Self-adhesive protective film for PP decorative plate and preparation method thereof |
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