CN115536429A - Preparation method of wood reinforced inorganic composite material - Google Patents
Preparation method of wood reinforced inorganic composite material Download PDFInfo
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- CN115536429A CN115536429A CN202211202247.2A CN202211202247A CN115536429A CN 115536429 A CN115536429 A CN 115536429A CN 202211202247 A CN202211202247 A CN 202211202247A CN 115536429 A CN115536429 A CN 115536429A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a preparation method of a wood reinforced inorganic composite material, which comprises the following steps: (1) Mixing and stirring sodium dodecyl sulfate, a polyvinyl alcohol aqueous solution, fatty alcohol-polyoxyethylene ether sodium sulfate and water to obtain a foaming agent; (2) Mixing wood shavings with water, adding an inorganic adhesive, stirring to obtain a first mixture, mixing a foaming agent with the first mixture, stirring to obtain a second mixture, and pressurizing, relieving pressure, maintaining and crushing to obtain porous particle units; (3) Mixing wood shavings with water, adding an inorganic adhesive and stirring to obtain a third mixture, mixing the third mixture with the porous particle units and stirring to obtain a fourth mixture, paving the fourth mixture into a plate blank, then performing hot press forming, and maintaining to obtain the wood reinforced inorganic composite material. The wood reinforced inorganic composite material prepared by the method has the advantages of light weight, high strength, heat preservation, water resistance and the like.
Description
Technical Field
The invention belongs to the field of building material manufacturing, relates to a preparation method of a wood reinforced inorganic composite material, and particularly relates to a preparation method of a light high-strength wood reinforced inorganic composite material.
Background
The wood reinforced inorganic composite material is a green and fireproof composite material which is prepared by taking wood shavings (fibers) such as wood, bamboo, straw and the like as a reinforcing material and inorganic adhesives such as portland cement, magnesium oxychloride cement or gypsum and the like as a base material through a certain forming process, and can be widely applied to the fields of furniture, indoor and outdoor decoration, building wall materials and the like.
The preparation process of the wood reinforced inorganic composite material mainly comprises a semi-dry process and a wet process. In the preparation process of the semi-dry production process, the mixed materials of the inorganic adhesive, the wood shavings (fibers) and the like are in a semi-dry state, foaming treatment cannot be carried out, the forming pressure is high, the density of the composite material is high, the strength is high, but the heat conducting property is good, and the heat insulation property is poor. In the preparation process of the wet production process, the mixed materials of the inorganic adhesive, the wood shavings (fibers) and the like are in a high-humidity slurry state, so that the foaming treatment is easy, and the prepared composite material has relatively low density, poor heat conductivity and good thermal insulation performance, but the mechanical strength of the composite material is relatively poor. Therefore, it is necessary to develop a new process for preparing a wood-reinforced inorganic composite material with high strength, light weight and heat insulation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a preparation method of a wood reinforced inorganic composite material with light weight, high strength, good heat insulation, heat preservation performance and waterproof performance.
In order to solve the technical problems, the invention adopts the following technical scheme.
A preparation method of a wood reinforced inorganic composite material comprises the following steps:
(1) Preparation of foaming agent: adding polyvinyl alcohol into hot water at the temperature of 80-90 ℃ for dissolving to obtain a polyvinyl alcohol aqueous solution, mixing and stirring lauryl sodium sulfate, the polyvinyl alcohol aqueous solution, fatty alcohol-polyoxyethylene ether sodium sulfate and water to obtain a foaming agent, wherein the lauryl sodium sulfate accounts for 40-50 parts by mass, the polyvinyl alcohol aqueous solution accounts for 15-20 parts by mass, the fatty alcohol-polyoxyethylene ether sodium sulfate accounts for 30-38 parts by mass, and the water accounts for 10-20 parts by mass;
(2) Preparing a porous particle unit by a wet method:
(2.1) mixing wood shavings with water, adding an inorganic adhesive, and fully stirring to obtain a first mixture, wherein the wood shavings account for 15-30 parts by mass, the water accounts for 40-70 parts by mass, and the inorganic adhesive accounts for 60-90 parts by mass;
(2.2) mixing the foaming agent obtained in the step (1) with the first mixture according to the mass ratio of 1: 1.2-1.4, stirring to obtain a second mixture, then putting the second mixture into a mold, pressurizing under the pressure of 1-1.5 MPa for 0.5-1 min, then relieving the pressure, standing, taking out from the mold, and curing and crushing to obtain a porous particle unit;
(3) Preparing a wood reinforced inorganic composite material by a semi-dry method:
(3.1) mixing wood shavings with water, adding an inorganic adhesive, and fully stirring to obtain a third mixture, wherein the wood shavings account for 20-25 parts by mass, the water accounts for 30-40 parts by mass, and the inorganic adhesive accounts for 70-85 parts by mass;
(3.2) mixing and stirring the third mixture and the porous particle unit obtained in the step (2.2) according to the mass ratio of 1: 0.2-0.6 to obtain a fourth mixture;
(3.3) paving the fourth mixture into a plate blank, then carrying out hot press forming, wherein the hot press pressure is 2-4 MPa, the hot press temperature is 90-120 ℃, the hot press time is 10-15 min, obtaining a semi-finished product of the wood reinforced inorganic composite material, and curing to obtain the wood reinforced inorganic composite material.
Preferably, the wood shavings comprise one or more of wood shavings, bamboo shavings and straw shavings, and the inorganic adhesive comprises one of portland cement, magnesium oxychloride cement and gypsum.
In the above method for producing a wood-reinforced inorganic composite material, in the step (1), the mass fraction of the polyvinyl alcohol in the aqueous solution of polyvinyl alcohol is preferably 5% to 10%.
In the above method for preparing the wood-reinforced inorganic composite material, preferably, in the step (1), the stirring time is 3min to 5min, and the stirring speed is 500r/min to 800r/min.
Preferably, in the step (2.1), the wood shavings are 40-60 meshes, the stirring time is 3-5 min, and the stirring rotation speed is 200-300 r/min.
In the above method for preparing a wood-reinforced inorganic composite material, preferably, in the step (2.2), the stirring time is 2min to 3min, the stirring speed is 300r/min to 500r/min, the standing is normal-temperature standing, the standing time is 48h to 72h, the curing time is 10d to 14d, and the wood-reinforced inorganic composite material is crushed to 2.5 meshes to 10 meshes.
In the above method for preparing the wood-reinforced inorganic composite material, preferably, in the step (3.1), the wood shavings are 20-40 meshes, the stirring time is 3-5 min, and the stirring speed is 200-300 r/min.
In the above method for preparing a wood-reinforced inorganic composite material, preferably, in the step (3.2), the stirring time is 2min to 3min, and the stirring speed is 500r/min to 700r/min.
In the above method for producing a wood-reinforced inorganic composite material, preferably, in the step (3.3), the thickness of the slab is 10mm to 40mm.
In the method for preparing the wood-reinforced inorganic composite material, in the step (3.3), the curing is natural curing, and the curing time is 15 to 25 days.
Compared with the prior art, the invention has the advantages that:
(1) Aiming at the characteristics that the semi-dry production process of the wood reinforced inorganic composite material has the defects of incapability of foaming treatment, large density and mechanical strength of the composite material, poor heat preservation performance and the like, and the wet production process has the characteristics of easiness in foaming treatment, small density of the composite material, poor mechanical strength, poor heat preservation performance and the like, the wood reinforced inorganic composite material is prepared by adopting the wood reinforced inorganic composite material and the composite material for synergy and preparing porous particles with good heat insulation and heat preservation performance through the wet process and is used as a heat insulation and preservation unit of the wood reinforced inorganic composite material, the heat insulation and preservation unit is compounded with an inorganic adhesive and wood shavings through the semi-dry process to prepare the wood reinforced inorganic composite material, and the process details are synergistically improved, so that the wood reinforced inorganic composite material is ensured to have good heat preservation performance and also ensured to have low density and sufficient mechanical strength.
(2) The invention adopts the polyvinyl alcohol as one of the components of the foaming agent, not only has good foaming effect, but also has the function of sealing the water entering the channels of the wood reinforced inorganic composite material, and can better improve the waterproof performance of the wood reinforced inorganic composite material (the expansion rate of the water absorption thickness is reduced within 24 hours).
Detailed Description
The invention is further described below with reference to specific preferred embodiments, without thereby limiting the scope of protection of the invention. The materials and equipment used in the following examples are commercially available.
Example 1:
the preparation method of the wood-reinforced inorganic composite material comprises the following steps:
(1) Preparation of foaming agent:
adding polyvinyl alcohol (PVA) into hot water at 90 ℃ to dissolve the PVA into aqueous solution with the mass fraction of 10%, and then mixing and stirring lauryl sodium sulfate (K12), the polyvinyl alcohol (PVA) aqueous solution, fatty alcohol polyoxyethylene ether sodium sulfate (AES) and water for 5min at the stirring speed of 600r/min to obtain the foaming agent, wherein the foaming agent comprises, by mass, 40 parts of K12, 15 parts of PVA aqueous solution, 30 parts of AES and 15 parts of water.
(2) Wet process for preparing porous particle unit
(2.1) fully mixing 40-mesh wood shavings with tap water, then adding portland cement and fully stirring for 5min at the stirring speed of 250r/min to obtain a first mixture, wherein the wood shavings account for 15 parts by mass, the tap water accounts for 40 parts by mass, and the portland cement accounts for 60 parts by mass.
(2.2) mixing and stirring the foaming agent and the first mixture according to the mass ratio of 1: 1.2 for 2.5min, wherein the stirring speed is 300r/min, obtaining a second mixture, then putting the second mixture into a mold, pressurizing for 0.5min under the pressure of 1MPa, then releasing the pressure, standing at normal temperature for 72h, then taking out the second mixture from the mold, maintaining for 14d, and then sending the second mixture into a crusher to crush the second mixture into 5-mesh porous particle units.
(3) Semidry method for preparing light high-strength wood reinforced silicate cement composite material
(3.1) fully mixing 20-mesh wood shavings with tap water, then adding portland cement, fully stirring for 3min at the stirring speed of 300r/min, and obtaining a third mixture, wherein the wood shavings account for 25 parts by mass, the tap water accounts for 30 parts by mass, and the portland cement accounts for 70 parts by mass.
(3.2) mixing and stirring the third mixture and the porous particle unit according to the mass ratio of 1: 0.2 for 3min, wherein the stirring speed is 600r/min, and obtaining a fourth mixture 4.
(3.3) paving the fourth mixture 4 into a plate blank with the thickness of 10mm, then sending the plate blank into a hot press for pressing and forming, wherein the pressure is 3MPa, the hot pressing temperature is 90 ℃, and the hot pressing time is 10min, so as to obtain a semi-finished product of the wood-reinforced inorganic composite material, and naturally curing the semi-finished product for 25 days to obtain the wood-reinforced inorganic composite material, in particular to the light-weight high-strength wood-reinforced portland cement composite material.
Comparative example 1:
fully mixing 20-mesh wood shavings with tap water, then adding portland cement and fully stirring for 3min, wherein the stirring speed is 300r/min. Wherein, the wood shavings account for 25 parts by mass, the tap water accounts for 30 parts by mass, and the portland cement accounts for 70 parts by mass. Paving the mixture into a plate blank with the thickness of 10mm, then sending the plate blank into a hot press for pressing and forming, wherein the pressure is 3MPa, the hot pressing temperature is 90 ℃, and the hot pressing time is 10min, so as to obtain a semi-finished product of the wood reinforced inorganic composite material, and naturally curing the semi-finished product for 25 days, so as to obtain the wood reinforced inorganic composite material.
The wood-reinforced inorganic composite materials obtained in example 1 and comparative example 1 were tested for density, internal bond strength, static bending strength, 24-hour water absorption thickness expansion ratio and thermal conductivity according to GBT 24312-2009 and GBT 23483-2009, and the results are shown in table 1.
Table 1 table of results of physical and mechanical properties test of the wood-reinforced inorganic composite materials of example 1 and comparative example 1
As can be seen from table 1, in the case that the density of the wood-reinforced inorganic composite material of the present embodiment is significantly lower than that of the comparative example 1, the strength is well maintained, which is close to that of the comparative example 1, and both exceed the national standards of cement particle boards, but the waterproof performance and the thermal insulation performance of the wood-reinforced inorganic composite material of the present embodiment are significantly better than those of the comparative example 1.
Example 2:
the preparation method of the wood-reinforced inorganic composite material comprises the following steps:
(1) Preparation of blowing agent
Adding polyvinyl alcohol (PVA) into hot water at 90 ℃ to dissolve the PVA into aqueous solution with the mass fraction of 10%, and then mixing and stirring sodium dodecyl sulfate (K12), the aqueous solution of the polyvinyl alcohol (PVA), sodium fatty alcohol-polyoxyethylene ether sulfate (AES) and water for 5min at the stirring speed of 600r/min to obtain the foaming agent, wherein the foaming agent comprises 40 parts by mass of K12, 15 parts by mass of the aqueous solution of the PVA, 30 parts by mass of AES and 15 parts by mass of water.
(2) Wet process for preparing porous particle unit
(2.1) fully mixing 50-mesh bamboo wood shavings with tap water, then adding magnesium oxychloride cement, fully stirring for 5min at the stirring speed of 200r/min to obtain a first mixture, wherein the bamboo wood shavings account for 15 parts by mass, the tap water accounts for 40 parts by mass, and the magnesium oxychloride cement accounts for 60 parts by mass.
(2.2) mixing and stirring the foaming agent and the first mixture according to the mass ratio of 1: 1.2 for 2.5min, wherein the stirring speed is 300r/min, and obtaining a second mixture. And putting the second mixture into a mold, pressurizing for 0.5min under the pressure of 1MPa, releasing the pressure, standing at normal temperature for 72h, taking out the second mixture from the mold, maintaining for 14d, and then feeding the second mixture into a crusher to crush the second mixture into porous particle units with 3 meshes.
(3) Semi-dry method for preparing light high-strength wood reinforced magnesium oxychloride cement composite material
(3.1) fully mixing 30-mesh bamboo wood shavings with tap water, then adding magnesium oxychloride cement, fully stirring for 3min at the stirring speed of 300r/min to obtain a third mixture, wherein the bamboo wood shavings account for 20 parts by mass, the tap water accounts for 30 parts by mass, and the magnesium oxychloride cement accounts for 70 parts by mass.
(3.2) mixing and stirring the third mixture and the porous particle unit according to the mass ratio of 1: 0.3 for 3min, wherein the stirring speed is 600r/min, and obtaining a fourth mixture.
(3.3) paving the fourth mixture into a plate blank with the thickness of 18mm, then sending the plate blank into a hot press for pressing and forming, wherein the pressure is 2.5MPa, the hot pressing temperature is 100 ℃, and the hot pressing time is 12min, so as to obtain a semi-finished product of the wood-reinforced inorganic composite material, and naturally curing the semi-finished product for 20 days to obtain the wood-reinforced inorganic composite material, in particular to the light-weight high-strength wood-reinforced magnesium oxychloride cement composite material.
Comparative example 2:
fully mixing 30-mesh bamboo wood shavings with tap water, then adding magnesium oxychloride cement, and fully stirring for 3min, wherein the stirring speed is 300r/min. Wherein, the wood shavings account for 20 parts, the tap water accounts for 30 parts, and the magnesium oxychloride cement accounts for 70 parts by mass. Paving the mixture into a slab with the thickness of 18mm, then sending the slab into a hot press for pressing and forming, wherein the pressure is 2.5MPa, the hot pressing temperature is 100 ℃, and the hot pressing time is 12min, so as to obtain a semi-finished product of the wood reinforced inorganic composite material, and naturally curing the semi-finished product for 20 days, so as to obtain the wood reinforced inorganic composite material.
The wood-reinforced inorganic composite materials obtained in example 2 and comparative example 2 were tested for density, internal bond strength, static bending strength, 24-hour water absorption thickness expansion rate and thermal conductivity according to GBT 24312-2009 and GBT 23483-2009, and the results are shown in table 2.
Table 2 table of results of the test of physical and mechanical properties of the wood reinforced inorganic composite material of example 2 and comparative example 2
Example 3:
the preparation method of the wood-reinforced inorganic composite material comprises the following steps:
(1) Preparation of the blowing agent
Adding polyvinyl alcohol (PVA) into hot water at 85 ℃ to dissolve the PVA into an aqueous solution with the mass fraction of 8%, and then mixing and stirring sodium dodecyl sulfate (K12), the aqueous solution of the polyvinyl alcohol (PVA), sodium fatty alcohol-polyoxyethylene ether sulfate (AES) and water for 4min at the stirring speed of 500r/min to obtain the foaming agent, wherein the foaming agent comprises 45 parts by mass of K12, 17 parts by mass of the aqueous solution of the PVA, 32 parts by mass of AES and 15 parts by mass of water.
(2) Wet process for preparing porous particle unit
(2.1) fully mixing 60-mesh straw shavings with tap water, then adding gypsum and fully stirring for 5min at the stirring speed of 300r/min to obtain a first mixture, wherein the straw shavings account for 20 parts by mass, the tap water accounts for 50 parts by mass, and the gypsum accounts for 60 parts by mass.
(2.2) mixing and stirring the foaming agent and the first mixture 1 according to the mass ratio of 1: 1.4 for 3min, wherein the stirring speed is 500r/min, and obtaining a second mixture. And then putting the second mixture into a mold, pressurizing for 1min under the pressure of 1.0MPa, releasing the pressure, standing at normal temperature for 72h, taking out the second mixture from the mold, maintaining for 12d, and then sending the second mixture into a crusher to crush the second mixture into porous particle units with 4 meshes.
(3) Semi-dry method for preparing light high-strength wood reinforced gypsum composite material
(3.1) fully mixing 40-mesh straw shavings with tap water, then adding gypsum and fully stirring for 5min at the stirring speed of 200r/min to obtain a third mixture, wherein the straw shavings account for 20 parts by mass, the tap water accounts for 30 parts by mass, and the gypsum accounts for 70 parts by mass.
(3.2) mixing and stirring the third mixture and the porous particle unit according to the mass ratio of 1: 0.6 for 3min, wherein the stirring speed is 600r/min, and obtaining a fourth mixture.
And (3.3) paving the fourth mixture into a plate blank with the thickness of 40mm, then sending the plate blank into a hot press for pressing and forming, wherein the pressure is 2MPa, the hot pressing temperature is 90 ℃, and the hot pressing time is 15min, so as to obtain a semi-finished product of the wood reinforced inorganic composite material, and naturally curing the semi-finished product for 20 days, so as to obtain the light high-strength wood reinforced gypsum composite material.
Comparative example 3:
mixing 40 mesh straw shavings with tap water, adding gypsum, and stirring for 5min at 200r/min. Wherein, the straw shavings account for 20 parts, the tap water accounts for 30 parts, and the gypsum accounts for 70 parts by weight. Paving the mixture into a 40mm plate blank, then sending the plate blank into a hot press for pressing and forming, wherein the pressure is 2MPa, the hot pressing temperature is 90 ℃, and the hot pressing time is 15min, so as to obtain a semi-finished product of the wood reinforced inorganic composite material, and naturally curing the semi-finished product for 20 days, so as to obtain the light high-strength wood reinforced gypsum composite material.
The wood-reinforced inorganic composite materials obtained in example 3 and comparative example 3 were tested for density, internal bond strength, static bending strength, 24-hour water absorption thickness expansion ratio and thermal conductivity according to GBT 24312-2009 and GBT 23483-2009, and the results are shown in table 3.
Table 3 table of results of the physical and mechanical properties test of the wood-reinforced inorganic composite materials of example 3 and comparative example 3
The foregoing is illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the spirit and scope of the invention, using the methods and techniques disclosed above. Therefore, any simple modifications, equivalent substitutions, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are within the scope of the technical scheme of the present invention.
Claims (10)
1. The preparation method of the wood reinforced inorganic composite material is characterized by comprising the following steps:
(1) Preparation of the foaming agent: adding polyvinyl alcohol into hot water at the temperature of 80-90 ℃ for dissolving to obtain a polyvinyl alcohol aqueous solution, mixing and stirring lauryl sodium sulfate, the polyvinyl alcohol aqueous solution, fatty alcohol-polyoxyethylene ether sodium sulfate and water to obtain a foaming agent, wherein the lauryl sodium sulfate accounts for 40-50 parts by mass, the polyvinyl alcohol aqueous solution accounts for 15-20 parts by mass, the fatty alcohol-polyoxyethylene ether sodium sulfate accounts for 30-38 parts by mass, and the water accounts for 10-20 parts by mass;
(2) Preparing a porous particle unit by a wet method:
(2.1) mixing wood shavings with water, adding an inorganic adhesive, and fully stirring to obtain a first mixture, wherein the wood shavings account for 15-30 parts by mass, the water accounts for 40-70 parts by mass, and the inorganic adhesive accounts for 60-90 parts by mass;
(2.2) mixing the foaming agent obtained in the step (1) with the first mixture according to the mass ratio of 1: 1.2-1.4, stirring to obtain a second mixture, then putting the second mixture into a mold, pressurizing under the pressure of 1-1.5 MPa for 0.5-1 min, then relieving the pressure, standing, taking out from the mold, and curing and crushing to obtain a porous particle unit;
(3) Preparing a wood reinforced inorganic composite material by a semi-dry method:
(3.1) mixing wood shavings with water, adding an inorganic adhesive, and fully stirring to obtain a third mixture, wherein the wood shavings account for 20-25 parts by mass, the water accounts for 30-40 parts by mass, and the inorganic adhesive accounts for 70-85 parts by mass;
(3.2) mixing and stirring the third mixture and the porous particle unit obtained in the step (2.2) according to the mass ratio of 1: 0.2-0.6 to obtain a fourth mixture;
and (3.3) paving the fourth mixture into a plate blank, then carrying out hot press forming, wherein the hot press pressure is 2-4 MPa, the hot press temperature is 90-120 ℃, the hot press time is 10-15 min, obtaining a semi-finished product of the wood reinforced inorganic composite material, and curing to obtain the wood reinforced inorganic composite material.
2. The method of claim 1, wherein the wood strands comprise one or more of wood strands, bamboo strands, and straw strands, and the inorganic binder comprises one of portland cement, magnesium oxychloride cement, and gypsum.
3. The method of claim 1, wherein in the step (1), the polyvinyl alcohol is contained in the aqueous solution of polyvinyl alcohol in an amount of 5 to 10% by mass.
4. The method of claim 1, wherein the stirring time in step (1) is 3 to 5min, and the stirring speed is 500 to 800r/min.
5. The method according to any one of claims 1 to 4, wherein in the step (2.1), the wood strands are 40 to 60 mesh, the stirring time is 3 to 5min, and the stirring rotation speed is 200 to 300r/min.
6. The method according to any one of claims 1 to 4, wherein in the step (2.2), the stirring time is 2min to 3min, the stirring speed is 300r/min to 500r/min, the standing is a standing at normal temperature, the standing time is 48h to 72h, the curing time is 10d to 14d, and the pulverization is carried out to 2.5 mesh to 10 mesh.
7. The method of any of claims 1-4, wherein in step (3.1), the wood strands are 20-40 mesh, the stirring time is 3-5 min, and the stirring speed is 200-300 r/min.
8. The method of any of claims 1-4, wherein in step (3.2), the stirring is performed for a time period of 2min to 3min and at a speed of 500r/min to 700r/min.
9. The method of producing the wood-reinforced inorganic composite material according to any one of claims 1 to 4, wherein in the step (3.3), the thickness of the slab is 10mm to 40mm.
10. The method according to any one of claims 1 to 4, wherein in the step (3.3), the curing is natural curing, and the curing time is 15 to 25 days.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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