CN110922779A - Building templates is moulded to environment-friendly wood - Google Patents
Building templates is moulded to environment-friendly wood Download PDFInfo
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- CN110922779A CN110922779A CN201911280438.9A CN201911280438A CN110922779A CN 110922779 A CN110922779 A CN 110922779A CN 201911280438 A CN201911280438 A CN 201911280438A CN 110922779 A CN110922779 A CN 110922779A
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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
- C08L97/00—Compositions of lignin-containing materials
- C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- 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
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses an environment-friendly wood-plastic building template, which belongs to the technical field of composite materials and comprises 80-95 parts by weight of HDPE powder, 160-180 parts by weight of pretreated wood powder, 6-10 parts by weight of waste tire rubber powder, 2-4 parts by weight of calcium carbonate, 0.2-1 part by weight of methyl methacrylate/acrylate copolymer, 2-5 parts by weight of coupling agent, 0.5-2 parts by weight of toughening agent and 1.5-2.5 parts by weight of lubricating agent. The environment-friendly wood-plastic building template uses waste tire rubber powder as a raw material, realizes the recycling of wastes, is energy-saving and environment-friendly, has good rigidity and toughness, can be repeatedly used, and avoids the waste and pollution caused by short service life of the template.
Description
Technical Field
The invention belongs to the technical field of composite materials, and particularly relates to an environment-friendly wood-plastic building template.
Background
The wood-plastic material is a composite material, is prepared by mixing plant fibers and resin, and the produced plate or section has the dual characteristics of wood and plastic, can completely imitate the natural texture of the wood, has good waterproof performance due to the addition of the resin, has good dimensional stability and is not easy to deform, is widely applied to indoor decoration and outdoor use, such as indoor and outdoor decorative wallboards, doors, benches, park bridge floors, garbage can outer cylinders and the like, and is an excellent substitute of the natural wood. Compared with the traditional wood-plastic building template, the wood-plastic building template is not easy to deform due to soaking in a water environment, has long service life, is difficult to rust, has lighter weight, is convenient to assemble and has lower cost compared with the traditional steel building template. But the building template made of the wood-plastic material has the problem of poor rigidity.
With the increasing severity of the pollution problem of waste tires, waste tire rubber is added to replace or partially replace resin in the production of many wood-plastic materials. However, the waste tire rubber belongs to thermosetting materials, the brittleness of the obtained wood-plastic plate is increased after the waste tire rubber is used, and if the building template is made of materials with higher brittleness, the problem of fracture in the using process is easy to occur, and normal operation is influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the technical problems to be solved by the invention are as follows: how to improve the rigidity and toughness of the wood-plastic material product containing the waste tire rubber powder.
In order to solve the technical problems, the invention adopts the technical scheme that: an environment-friendly wood-plastic building template comprises the following components in parts by weight: 75-90 parts of HDPE powder, 150-170 parts of pretreated wood powder, 16-20 parts of waste tire rubber powder, 2-4 parts of calcium carbonate, 0.2-1 part of methyl methacrylate/acrylate copolymer, 2-5 parts of coupling agent, 0.5-2 parts of toughening agent and 1.5-2.5 parts of lubricant;
the wood powder pretreatment method comprises the following steps: soaking wood powder in ethanol for 0.5-2 hr, soaking in tap water, heating to 85-100 deg.C, steaming for 1-2 hr, and oven drying.
The other technical scheme adopted by the invention is as follows: the preparation method of the environment-friendly wood-plastic building template comprises the following steps:
mixing calcium carbonate and the pretreated wood powder, heating to 100 ℃, and uniformly mixing for 8-10 min; then adding a coupling agent, heating to 115 ℃, uniformly mixing for 2-3min, adding HDPE powder and cleaned and dried waste tire rubber powder, and mixing for 8-10 min; and then adding methyl methacrylate/acrylate copolymer, a toughening agent and a lubricant, heating to 180 ℃ for mixing, cooling, and carrying out compression molding to obtain the wood-plastic building template.
The invention has the beneficial effects that: according to the environment-friendly wood-plastic building template provided by the application, the pretreated wood flour is used as a raw material, acetic acid, propionic acid, butyric acid and tannic acid in the wood flour are removed, the influence on a resin structure and the action with a coupling agent in the subsequent processing process is effectively avoided, the compatibility of the wood flour, HDPE powder and waste tire rubber powder is improved due to the common use of calcium carbonate and methyl methacrylate/acrylate copolymer, the use of the coupling agent, the toughening agent and the lubricant is matched, the quality of the obtained environment-friendly wood-plastic building template is effectively improved, and the rigidity and the toughness of the environment-friendly wood-plastic building template are improved; the application provides a building templates is moulded to environment-friendly wood uses junked tire rubber powder as the raw materials, realizes recycling of wastes material, and is energy-concerving and environment-protective, and the building templates is moulded to obtained environment-friendly wood has good rigidity and toughness, repeatedly usable, has avoided because of the waste and the pollution that the template life-span was short to bring.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description will be given with reference to the embodiments.
The most key concept of the invention is as follows: the wood powder is pretreated, and meanwhile, calcium carbonate and methyl methacrylate/acrylate copolymer are added, so that the compatibility of the wood powder, HDPE powder and waste tire rubber powder is improved.
The invention provides an environment-friendly wood-plastic building template which comprises the following components in parts by weight: 75-90 parts of HDPE powder, 150-170 parts of pretreated wood powder, 16-20 parts of waste tire rubber powder, 2-4 parts of calcium carbonate, 0.2-1 part of methyl methacrylate/acrylate copolymer, 2-5 parts of coupling agent, 0.5-2 parts of toughening agent and 1.5-2.5 parts of lubricant;
the wood powder pretreatment method comprises the following steps: soaking wood powder in ethanol for 0.5-2 hr, soaking in tap water, heating to 85-100 deg.C, steaming for 1-2 hr, and oven drying.
The preparation method of the environment-friendly wood-plastic building template comprises the following steps:
mixing calcium carbonate and the pretreated wood powder, heating to 100 ℃, and uniformly mixing for 8-10 min; then adding a coupling agent, heating to 115 ℃, uniformly mixing for 2-3min, adding HDPE powder and cleaned and dried waste tire rubber powder, and mixing for 8-10 min; and then adding methyl methacrylate/acrylate copolymer, a toughening agent and a lubricant, heating to 180 ℃ for mixing, cooling, and carrying out compression molding to obtain the wood-plastic building template.
From the above description, the beneficial effects of the present invention are: according to the environment-friendly wood-plastic building template provided by the application, the pretreated wood flour is used as a raw material, acetic acid, propionic acid, butyric acid and tannic acid in the wood flour are removed, the influence on a resin structure and the action with a coupling agent in the subsequent processing process is effectively avoided, the calcium carbonate and the methyl methacrylate/acrylate copolymer are shared, the compatibility of the wood flour, HDPE powder and waste tire rubber powder is improved, the rheological property of a melt is effectively improved by the methyl methacrylate/acrylate copolymer, the surface of the obtained plastic building template is smoother, and meanwhile, the coupling agent, the toughening agent and the lubricant are matched for use, the quality of the obtained environment-friendly wood-plastic building template is effectively improved, and the rigidity and the toughness of the environment-friendly wood-plastic building template are improved; the application provides a building templates is moulded to environment-friendly wood uses junked tire rubber powder as the raw materials, realizes recycling of wastes material, and is energy-concerving and environment-protective, and the building templates is moulded to obtained environment-friendly wood has good rigidity and toughness, repeatedly usable, has avoided because of the waste and the pollution that the template life-span was short to bring.
Furthermore, the water content of the pretreated wood flour is 3-5%, and the particle size is 120-150 meshes.
From the above description, the moisture content and particle size of wood flour significantly affect the quality of the resulting finished product.
Further, the coupling agent is composed of SMA resin (styrene-maleic anhydride copolymer) and MAPE (maleic anhydride grafted polyethylene) in a mass ratio of 2: 1.
The description shows that the coupling agent consisting of the SMA resin and the MAPE can be applied to the wood-plastic building template to remarkably improve the tensile strength, the bending strength and the impact strength of the obtained wood-plastic building template, and the two generate synergistic effect, so that the effect is better compared with the use of any monomer.
Further, the toughening agent is chlorinated polyethylene.
As can be seen from the above description, the chlorinated polyethylene as the toughening agent has good compatibility with other raw materials, and the chlorinated polyethylene can be used together with the coupling agent to improve the toughness of the obtained wood-plastic building template.
Further, the lubricant is prepared from the following components in a mass ratio of 2: 1: 1G 60 lubricant, octadecanoic acid and polyethylene wax.
As can be seen from the above description, the lubricant composed of the above components can effectively play a role in internal lubrication and external lubrication, promote the dispersibility of calcium carbonate after addition, reduce the viscosity of the system, increase the fluidity, effectively prevent melt fracture, and simultaneously reduce the friction between the raw materials and the barrel and the screw, and has better effect compared with the use of any monomer.
Further, the preparation method of the environment-friendly wood-plastic building template further comprises the step of compounding the thermoplastic film on the surface of the wood-plastic building template through hot pressing and fusion.
As can be seen from the above description, demolding is facilitated by compounding a thermoplastic film on the surface of the wood-plastic building template in use.
Example 1:
an environment-friendly wood-plastic building template comprises the following components in parts by weight: 75kg of HDPE powder, 150kg of pretreated wood powder, 18kg of waste tire rubber powder, 2kg of calcium carbonate, 0.5kg of methyl methacrylate/acrylate copolymer, 3kg of coupling agent, 0.5kg of chlorinated polyethylene and 1.5kg of lubricant;
the wood powder pretreatment method comprises the following steps: soaking wood powder in ethanol for 1.5h, soaking in tap water, heating to 85-100 deg.C, steaming for 1h, and oven drying; the water content of the pretreated wood flour is 4%, and the grain size is 130 meshes;
the coupling agent consists of SMA resin and MAPE in a mass ratio of 2: 1;
the lubricant is prepared from the following components in percentage by mass: 1: 1G 60 lubricant, octadecanoic acid and polyethylene wax;
mixing calcium carbonate and the pretreated wood powder, heating to 100 ℃, and uniformly mixing for 8-10 min; then adding a coupling agent, heating to 115 ℃, uniformly mixing for 2-3min, adding HDPE powder and cleaned and dried waste tire rubber powder, and mixing for 8-10 min; and then adding methyl methacrylate/acrylate copolymer, a toughening agent and a lubricant, heating to 180 ℃ for mixing, then cooling and compression molding to obtain the wood-plastic building template, and compounding the thermoplastic film on the surface of the wood-plastic building template through hot-pressing fusion.
Example 2:
an environment-friendly wood-plastic building template comprises the following components in parts by weight: 85kg of HDPE powder, 160kg of pretreated wood powder, 16kg of waste tire rubber powder, 3kg of calcium carbonate, 0.2kg of methyl methacrylate/acrylate copolymer, 2kg of coupling agent, 1.6kg of chlorinated polyethylene and 2kg of lubricant;
the wood powder pretreatment method comprises the following steps: soaking wood powder in ethanol for 1h, soaking in tap water, heating to 85-100 deg.C, steaming for 2h, and oven drying; the water content of the pretreated wood flour is 3%, and the grain size is 140 meshes;
the coupling agent consists of SMA resin and MAPE in a mass ratio of 2: 1;
the lubricant is prepared from the following components in percentage by mass: 1: 1G 60 lubricant, octadecanoic acid and polyethylene wax;
mixing calcium carbonate and the pretreated wood powder, heating to 100 ℃, and uniformly mixing for 8-10 min; then adding a coupling agent, heating to 115 ℃, uniformly mixing for 2-3min, adding HDPE powder and cleaned and dried waste tire rubber powder, and mixing for 8-10 min; and then adding methyl methacrylate/acrylate copolymer, a toughening agent and a lubricant, heating to 180 ℃ for mixing, then cooling and compression molding to obtain the wood-plastic building template, and compounding the thermoplastic film on the surface of the wood-plastic building template through hot-pressing fusion.
Example 3:
an environment-friendly wood-plastic building template comprises the following components in parts by weight: 90kg of HDPE powder, 170kg of pretreated wood powder, 20kg of waste tire rubber powder, 4kg of calcium carbonate, 1kg of methyl methacrylate/acrylate copolymer, 5kg of coupling agent, 2kg of chlorinated polyethylene and 2.5kg of lubricant;
the wood powder pretreatment method comprises the following steps: soaking wood powder in ethanol for 2h, soaking in tap water, heating to 85-100 deg.C, steaming for 2h, and oven drying; the water content of the pretreated wood flour is 3%, and the grain size is 120 meshes;
the coupling agent consists of SMA resin and MAPE in a mass ratio of 2: 1;
the lubricant is prepared from the following components in percentage by mass: 1: 1G 60 lubricant, octadecanoic acid and polyethylene wax;
mixing calcium carbonate and the pretreated wood powder, heating to 100 ℃, and uniformly mixing for 8-10 min; then adding a coupling agent, heating to 115 ℃, uniformly mixing for 2-3min, adding HDPE powder and cleaned and dried waste tire rubber powder, and mixing for 8-10 min; and then adding methyl methacrylate/acrylate copolymer, a toughening agent and a lubricant, heating to 180 ℃ for mixing, then cooling and compression molding to obtain the wood-plastic building template, and compounding the thermoplastic film on the surface of the wood-plastic building template through hot-pressing fusion.
Example 4:
an environment-friendly wood-plastic building template comprises the following components in parts by weight: 80kg of HDPE powder, 165kg of pretreated wood powder, 17kg of waste tire rubber powder, 3kg of calcium carbonate, 0.8kg of methyl methacrylate/acrylate copolymer, 4kg of coupling agent, 1kg of chlorinated polyethylene and 2kg of lubricant;
the wood powder pretreatment method comprises the following steps: soaking wood powder in ethanol for 0.5h, soaking in tap water, heating to 85-100 deg.C, steaming for 1.5h, and oven drying; the water content of the pretreated wood flour is 5%, and the grain size is 150 meshes;
the coupling agent consists of SMA resin and MAPE in a mass ratio of 2: 1;
the lubricant is prepared from the following components in percentage by mass: 1: 1G 60 lubricant, octadecanoic acid and polyethylene wax;
mixing calcium carbonate and the pretreated wood powder, heating to 100 ℃, and uniformly mixing for 8-10 min; then adding a coupling agent, heating to 115 ℃, uniformly mixing for 2-3min, adding HDPE powder and cleaned and dried waste tire rubber powder, and mixing for 8-10 min; and then adding methyl methacrylate/acrylate copolymer, a toughening agent and a lubricant, heating to 180 ℃ for mixing, cooling, and carrying out compression molding to obtain the wood-plastic building template.
Comparative example 1:
comparative example 1 differs from example 3 in that the wood flour has not been pretreated.
Comparative example 2:
comparative example 2 differs from example 3 in that the coupling agent was 5kg of SMA resin.
Comparative example 3:
comparative example 3 differs from example 3 in that the coupling agent was 5kg of MAPE.
Comparative example 4:
comparative example 4 differs from example 3 in that no chlorinated polyethylene was added.
The performance test of the wood-plastic building templates prepared in examples 1 to 4 and comparative examples 1 to 4 was performed, and the results are shown in table 1.
TABLE 1
As can be seen from table 1, the mechanical properties of the wood-plastic building template can be significantly improved by simultaneously adding the SMA resin and the MAPE, the SMA resin structure has nonpolar and polar groups, and has good compatibility with the resin and the MAPE in the raw materials, so that the impact strength of the material can be significantly enhanced, and the bending strength and the tensile strength of the plastic building template can be significantly improved by using the MAPE; meanwhile, the mechanical property of the wood-plastic building template can be obviously improved by using the treated wood powder and the treated chlorinated polyethylene.
In conclusion, the environment-friendly wood-plastic building template provided by the invention uses the pretreated wood flour as a raw material, removes acetic acid, propionic acid, butyric acid and tannic acid in the wood flour, effectively avoids the influence on a resin structure and the action of a coupling agent in the subsequent processing process, improves the compatibility of the wood flour, HDPE powder and waste tire rubber powder due to the sharing of calcium carbonate and methyl methacrylate/acrylate copolymer, effectively improves the quality of the obtained environment-friendly wood-plastic building template by matching with the coupling agent, the toughening agent and the lubricant, and improves the rigidity and the toughness of the environment-friendly wood-plastic building template; the application provides a building templates is moulded to environment-friendly wood uses junked tire rubber powder as the raw materials, realizes recycling of wastes material, and is energy-concerving and environment-protective, and the building templates is moulded to obtained environment-friendly wood has good rigidity and toughness, repeatedly usable, has avoided because of the waste and the pollution that the template life-span was short to bring.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention in the specification or directly or indirectly applied to the related technical field are included in the scope of the present invention.
Claims (6)
1. The environment-friendly wood-plastic building template is characterized by comprising the following components in parts by weight: 75-90 parts of HDPE powder, 150-170 parts of pretreated wood powder, 16-20 parts of waste tire rubber powder, 2-4 parts of calcium carbonate, 0.2-1 part of methyl methacrylate/acrylate copolymer, 2-5 parts of coupling agent, 0.5-2 parts of toughening agent and 1.5-2.5 parts of lubricant;
the wood powder pretreatment method comprises the following steps: soaking wood powder in ethanol for 0.5-2 hr, soaking in tap water, heating to 85-100 deg.C, steaming for 1-2 hr, and oven drying.
2. The environment-friendly wood-plastic building template as recited in claim 1, wherein the pre-treated wood flour has a water content of 3-5% and a particle size of 120-150 mesh.
3. The environment-friendly wood-plastic building template according to claim 1, wherein the coupling agent consists of SMA resin and MAPE in a mass ratio of 2: 1.
4. The environment-friendly wood-plastic building template according to claim 3, wherein the toughening agent is chlorinated polyethylene.
5. The environment-friendly wood-plastic building template as claimed in claim 1, wherein the lubricant is prepared from 2: 1: 1G 60 lubricant, octadecanoic acid and polyethylene wax.
6. The method for preparing the environment-friendly wood-plastic building template according to any one of claims 1 to 5, which is characterized by comprising the following steps of:
mixing calcium carbonate and the pretreated wood powder, heating to 100 ℃, and uniformly mixing for 8-10 min; then adding a coupling agent, heating to 115 ℃, uniformly mixing for 2-3min, adding HDPE powder and cleaned and dried waste tire rubber powder, and mixing for 8-10 min; and then adding methyl methacrylate/acrylate copolymer, a toughening agent and a lubricant, heating to 180 ℃ for mixing, cooling, and carrying out compression molding to obtain the wood-plastic building template.
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Cited By (1)
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