CN110054471B - Magnesium-based plant fiberboard and preparation method thereof - Google Patents
Magnesium-based plant fiberboard and preparation method thereof Download PDFInfo
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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
- C04B28/30—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 magnesium cements or similar cements
- C04B28/32—Magnesium oxychloride cements, e.g. Sorel cement
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00017—Aspects relating to the protection of the environment
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- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention discloses a magnesium-based plant fiberboard and a preparation method thereof, wherein the magnesium-based plant fiberboard comprises a forming agent, a reinforcing material, a modifier, an activator, a foaming agent and water, wherein the forming agent is magnesium chloride and magnesium oxide; the reinforcing material is a mixture consisting of fly ash, wheat straw powder, blast furnace slag, talcum powder and mica powder; the modifier is a mixture consisting of sodium tripolyphosphate, 3-aminopropyl trimethoxysilane and sodium silicate; the activating agent is a mixture consisting of calcium hydroxide, polyvinyl alcohol and sodium sulfate; the foaming agent is a mixture consisting of sodium bicarbonate, aluminum sulfate and silicon carbide. According to the invention, the problem of poor moisture resistance of the traditional straw board is solved by the action of the forming agent, the reinforcing material, the modifier, the activator and the foaming agent and the combination of specific process conditions, and the prepared magnesium-based plant fiber board has good breaking strength and impact strength.
Description
Technical Field
The invention relates to the field of fiberboard production, in particular to a magnesium-based plant fiberboard and a preparation method thereof.
Background
At present, according to incomplete statistics, the utilization rate of agricultural and forestry wastes such as straws utilized in the world is less than 2%, the utilization rate of the straws in China is 33%, and if the straw materials are made into boards, a lot of wood resources are saved, so that the pressing of the straws after a series of complex industrial treatment into the boards is one of important research directions in the future.
The magnesium oxychloride material has excellent physical and mechanical properties, fire resistance and wear resistance, so that the material can be widely applied to the fields of building engineering, municipal engineering, traffic and light industry. Currently, magnesium oxychloride material usually uses magnesium oxide and magnesium chloride as forming agents, in order to make magnesium fully and quickly coagulate, it is crucial to control the proper content of magnesium chloride, if too low, the purpose of fully and quickly coagulating magnesium cannot be achieved, and the content of chloride ion is too high, which is liable to cause the plate to absorb moisture and return to halogen. In addition, the magnesium oxychloride material in the prior art is difficult to meet the national or industrial standard requirements in the aspects of breaking strength, impact strength, shrinkage, wet expansion rate, screw holding force, incombustibility and the like, and is easy to age and deform, so that the use of the magnesium oxychloride material in actual production is limited. Therefore, the magnesium-based plant fiber board material which reasonably utilizes straw resources and has good mechanical properties is needed in the field.
Disclosure of Invention
This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. In this section, as well as in the abstract and the title of the invention of this application, simplifications or omissions may be made to avoid obscuring the purpose of the section, the abstract and the title, and such simplifications or omissions are not intended to limit the scope of the invention.
The present invention has been made in view of the above and/or other problems occurring in the prior art.
Therefore, one of the objects of the present invention is to provide a magnesium-based plant fiber board, which overcomes the disadvantages of the existing magnesium-based plant fiber board.
To solve the above technical problem, according to an aspect of the present invention, the present invention provides the following technical solutions: the magnesium-based plant fiberboard comprises a forming agent, a reinforcing material, a modifier, an activator, a foaming agent and water, wherein the forming agent comprises 20-30 parts by mass of magnesium chloride and 80-100 parts by mass of magnesium oxide; the reinforcing material is a mixture consisting of 10-15 parts of fly ash, 10-20 parts of wheat straw powder, 10-15 parts of blast furnace slag, 1-2 parts of talcum powder and 1-2 parts of mica powder in parts by mass; the modifier is a mixture consisting of 1-4 parts of sodium tripolyphosphate, 1-2 parts of 3-aminopropyl trimethoxysilane and 1-2 parts of sodium silicate in parts by mass; the activating agent is a mixture composed of calcium hydroxide, polyvinyl alcohol and sodium sulfate, and the activating agent comprises, by mass, 0.5-1 part of calcium hydroxide, 0.5-1 part of polyvinyl alcohol and 0.5-1 part of sodium sulfate; the foaming agent is a mixture consisting of sodium bicarbonate, aluminum sulfate and silicon carbide, and the foaming agent comprises, by mass, 0.6-3 parts of sodium bicarbonate, 0.1-0.5 part of aluminum sulfate and 0.5-1 part of silicon carbide; the water is deionized water, and the deionized water accounts for 100-120 parts by mass.
As a preferable embodiment of the magnesium-based plant fiber board of the present invention, wherein: the modified magnesium-aluminum-magnesium-aluminum alloy material is characterized by comprising, by weight, 25 parts of magnesium chloride, 100 parts of magnesium oxide, 15 parts of fly ash, 20 parts of wheat straw powder, 15 parts of blast furnace slag, 2 parts of talcum powder, 2 parts of mica powder, 2 parts of sodium tripolyphosphate, 1 part of 3-aminopropyl trimethoxy silane, 1 part of sodium silicate, 1 part of calcium hydroxide, 1 part of polyvinyl alcohol, 1 part of sodium sulfate, 1 part of sodium bicarbonate, 0.3 part of aluminum sulfate and 0.5 part of silicon carbide.
As a preferable embodiment of the magnesium-based plant fiber board of the present invention, wherein: the particle size of the coal ash is 100 meshes, the particle size of the blast furnace slag is 10 mu m, the particle size of the wheat straw powder is 60 meshes, the particle size of the talcum powder is 0.02mm, and the particle size of the mica powder is 0.01 mm.
As a preferable embodiment of the magnesium-based plant fiber board of the present invention, wherein: the magnesium oxide is light-burned magnesium oxide, and the activity of the magnesium oxide is 60-65%.
As a preferable embodiment of the magnesium-based plant fiber board of the present invention, wherein: the magnesium chloride is one or more of anhydrous magnesium chloride and magnesium chloride hexahydrate.
The invention also aims to overcome the defects of the existing preparation method of the magnesium-based plant fiber board and provide a preparation method of the magnesium-based plant fiber board.
In order to solve the above technical problem, according to another aspect of the present invention, the present invention provides the following technical solutions: a production method of a magnesium-based plant fiberboard comprises the steps of putting 20-30 parts of magnesium chloride into 100-120 parts of water, and uniformly stirring and mixing to obtain a magnesium chloride aqueous solution; adding 80-100 parts of magnesium oxide into the magnesium chloride aqueous solution, and then sequentially adding a reinforcing material, a modifier, an activator and a foaming agent to mix to prepare magnesium-based plant fiberboard slurry; putting the magnesium-based plant fiber board slurry into a mold, laying 1-5 layers of two-dimensional fiber mesh cloth or three-dimensional fiber hollow fabric, and performing roll forming; and (3) curing for 24 hours under natural conditions, demolding, curing for 2 days under the environment that the temperature is 15-30 ℃ and the air humidity is 30-50, and cutting and polishing to obtain the magnesium-based plant fiber board.
As a preferable embodiment of the method for producing the magnesium-based plant fiber board of the present invention, wherein: the reinforcing materials are fly ash, wheat straw powder, blast furnace slag, talcum powder and mica powder, wherein the forming agent is magnesium chloride and magnesium oxide, and the magnesium chloride accounts for 20-30 parts and the magnesium oxide accounts for 80-100 parts by mass; the reinforcing material is a mixture consisting of 10-15 parts of fly ash, 10-20 parts of wheat straw powder, 10-15 parts of blast furnace slag, 2-4 parts of talcum powder and 2-4 parts of mica powder in parts by mass; the modifier is a mixture consisting of 1-4 parts of sodium tripolyphosphate, 1-2 parts of 3-aminopropyl trimethoxysilane and 1-2 parts of sodium silicate in parts by mass; the activating agent is a mixture composed of calcium hydroxide, polyvinyl alcohol and sodium sulfate, and the activating agent comprises, by mass, 0.5-1 part of calcium hydroxide, 0.5-1 part of polyvinyl alcohol and 0.5-1 part of sodium sulfate; the foaming agent is a mixture consisting of sodium bicarbonate, aluminum sulfate and silicon carbide, and the foaming agent comprises, by mass, 0.6-3 parts of sodium bicarbonate, 0.1-0.5 part of aluminum sulfate and 0.5-1 part of silicon carbide.
As a preferable embodiment of the method for producing the magnesium-based plant fiber board of the present invention, wherein: the particle size of the coal ash is 100 meshes, the particle size of the blast furnace slag is 10 mu m, the particle size of the wheat straw powder is 60 meshes, the particle size of the talcum powder is 0.02mm, and the particle size of the mica powder is 0.01 mm.
The invention has the beneficial effects that:
(1) the invention adopts low-pollution additive materials, can reduce the environmental pollution, solves the environmental protection problem of the traditional straw board, simultaneously solves the problem of poor moisture resistance of the traditional straw board by combining the synergistic effect of the forming agent, the reinforcing material, the modifier, the activator and the foaming agent through specific process conditions, and the prepared magnesium-based plant fiber board has the advantages that the flexural strength and the tensile strength reach better levels, the flexural strength reaches 32.9MPa, the tensile strength reaches 16.9MPa and the screw holding force reaches 110N/m.
(2) The preparation method disclosed by the invention is simple in preparation process, simple and feasible, convenient and fast to operate, low in cost, free of pollution and suitable for large-scale production.
(3) The foaming agent is added, so that the size of the slurry is increased, the specific gravity of the product is reduced, the airing and air-drying time is shortened, the production process is shortened, and the production cost is reduced under the condition that the strength and the fire resistance of the product are not reduced.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, specific embodiments thereof are described in detail below with reference to examples of the specification.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
The magnesium oxide is light-burned magnesium oxide, and the activity of the magnesium oxide is 60-65%.
Example 1
Adding 25 parts of magnesium chloride into 120 parts of water, and uniformly stirring and mixing to obtain a magnesium chloride aqueous solution;
adding 100 parts of magnesium oxide into the magnesium chloride aqueous solution, sequentially adding a reinforcing material, a modifier, an activator and a foaming agent, and mixing to prepare magnesium-based plant fiberboard slurry;
putting the magnesium-based plant fiber board slurry into a mold, laying 1-5 layers of two-dimensional fiber mesh cloth or three-dimensional fiber hollow fabric, and performing roll forming;
and (3) curing for 24 hours under natural conditions, demolding, curing for 3 days under the environment that the temperature is 15-30 ℃ and the air humidity is 30-50, and cutting and polishing to obtain the magnesium-based plant fiber board.
Wherein the reinforcing materials are 15 parts of fly ash, 20 parts of wheat straw powder, 15 parts of blast furnace slag, 2 parts of talcum powder, 2 parts of mica powder, 100 meshes of fly ash, 10 mu m of blast furnace slag, 60 meshes of wheat straw powder, 0.02mm of talcum powder and 0.01mm of mica powder;
the modifier comprises 2 parts of sodium tripolyphosphate, 1 part of 3-aminopropyltrimethoxysilane and 1 part of sodium silicate in parts by mass;
the activating agents comprise 1 part of calcium hydroxide, 1 part of polyvinyl alcohol and 1 part of sodium sulfate in parts by mass;
the foaming agent comprises 2 parts by mass of sodium bicarbonate, 0.3 part by mass of aluminum sulfate and 0.5 part by mass of silicon carbide.
Example 2
Putting 30 parts of magnesium chloride into 120 parts of water, and uniformly stirring and mixing to obtain a magnesium chloride aqueous solution;
adding 100 parts of magnesium oxide into the magnesium chloride aqueous solution, sequentially adding a reinforcing material, a modifier, an activator and a foaming agent, and mixing to prepare magnesium-based plant fiberboard slurry;
putting the magnesium-based plant fiber board slurry into a mold, laying 1-5 layers of two-dimensional fiber mesh cloth or three-dimensional fiber hollow fabric, and performing roll forming;
and (3) curing for 24 hours under natural conditions, demolding, curing for 3 days under the environment that the temperature is 15-30 ℃ and the air humidity is 30-50, and cutting and polishing to obtain the magnesium-based plant fiber board.
Wherein the reinforcing materials are 15 parts of fly ash, 20 parts of wheat straw powder, 15 parts of blast furnace slag, 4 parts of talcum powder, 4 parts of mica powder, 100 meshes of fly ash, 10 mu m of blast furnace slag, 60 meshes of wheat straw powder, 0.02mm of talcum powder and 0.01mm of mica powder;
the modifier is sodium tripolyphosphate, 3-aminopropyl trimethoxy silane and sodium silicate, and the sodium tripolyphosphate is 4 parts, the 3-aminopropyl trimethoxy silane is 2 parts, and the sodium silicate is 2 parts by mass;
the activating agents comprise 1 part of calcium hydroxide, 1 part of polyvinyl alcohol and 1 part of sodium sulfate in parts by mass;
the foaming agent comprises 3 parts by mass of sodium bicarbonate, 0.5 part by mass of aluminum sulfate and 1 part by mass of silicon carbide.
Example 3
Putting 20 parts of magnesium chloride into 100 parts of water, and stirring and mixing uniformly to obtain a magnesium chloride aqueous solution;
adding 80 parts of magnesium oxide into the magnesium chloride aqueous solution, and then sequentially adding a reinforcing material, a modifier, an activator and a foaming agent to mix to prepare magnesium-based plant fiberboard slurry;
putting the magnesium-based plant fiber board slurry into a mold, laying 1-5 layers of two-dimensional fiber mesh cloth or three-dimensional fiber hollow fabric, and performing roll forming;
and (3) curing for 24 hours under natural conditions, demolding, curing for 3 days under the environment that the temperature is 15-30 ℃ and the air humidity is 30-50, and cutting and polishing to obtain the magnesium-based plant fiber board.
Wherein the reinforcing materials are 10 parts of fly ash, 10 parts of wheat straw powder, 10 parts of blast furnace slag, 2 parts of talcum powder, 2 parts of mica powder, 100 meshes of fly ash, 10 mu m of blast furnace slag, 60 meshes of wheat straw powder, 0.02mm of talcum powder and 0.01mm of mica powder;
the modifier comprises 1 part of sodium tripolyphosphate, 1 part of 3-aminopropyl trimethoxysilane and 1 part of sodium silicate in parts by mass;
the activating agents comprise 0.5 part of calcium hydroxide, 0.5 part of polyvinyl alcohol and 0.5 part of sodium sulfate in parts by mass;
the foaming agent comprises 0.6 part of sodium bicarbonate, 0.1 part of aluminum sulfate and 0.5 part of silicon carbide in parts by mass.
TABLE 1 ingredients, contents and experimental results of examples 1-3
As can be seen from Table 1, the magnesium-based plant fiber board prepared by using magnesium oxide and magnesium chloride as forming agents and adding reinforcing materials, modifiers, activators, foaming agents and water has the apparent density of 1.18t/m3The breaking strength is 32.9MPa, which is better than the lowest standard value of JC688-2006, namely 10.0 MPa; the impact strength is 5.2kJ/m2Is superior to the minimum standard value of JC688-2006 of 2.5J/m2(ii) a The water content of the product is 6.9 percent and is superior to the highest standard value of JC688-2006 by 8 percent; the wet expansion rate is 0.49 percent and is better than the highest standard value of JC688-2006 by 0.6 percent; the screw holding force is 110N/m, which is superior to JC688-2006 standard; no water drop and no moisture regain, meets the standard requirement of JC688-2006, and the grade A requirement in GB8624-1997 can be obtained due to the incombustibility.
TABLE 2 ingredients, contents and experimental results of comparative examples 1 to 4
TABLE 3 ingredients, contents and experimental results of comparative examples 5 to 8
TABLE 4 ingredients, contents and experimental results of comparative examples 9 to 12
TABLE 5 ingredients, contents and experimental results of comparative examples 13 to 15
In summary, the reinforcing material in the invention is a mixture of fly ash, wheat straw powder, blast furnace slag, talcum powder and mica powder, preferably 10-15 parts of fly ash, 10-20 parts of wheat straw powder, 10-15 parts of blast furnace slag, 2-4 parts of talcum powder and 2-4 parts of mica powder, and the board has good tensile strength and flexural strength, and meanwhile, the inventor finds that the impact of the wheat straw powder, the particle size of fly ash and the particle size of blast furnace slag on the flexural strength and the tensile strength of the board is large (see table 6), the invention preferably selects the particle size of fly ash of 100 meshes, the particle size of blast furnace slag of 10 μm and the particle size of wheat straw of 60 meshes, and the prepared board has good tensile strength and flexural strength.
TABLE 6 influence of fly ash, wheat straw powder and blast furnace slag, particle size on the performance of the panels
It can be seen that the influence of the wheat straw particle size on the flexural strength and the tensile strength of the board is large, and the flexural strength and the tensile strength become large along with the increase of the wheat straw particle size, and the dispersion degree of the wheat straw powder in a reaction system is influenced by the difference of the wheat straw particle size, so that the wheat straw powder with the small particle size is more uniformly dispersed in the system, the internal pores of a magnesium oxychloride system in the board are uniformly distributed, the compactness of the board is better, and the tensile strength of a sample is better. As the particle size of the wheat straw powder is increased, the length diameter is increased, the length of the fiber is longer, the wheat straw powder can be filled into the skeleton of the chlorine-oxygen-magnesium ternary system in the board due to the good affinity of the chlorine-oxygen-magnesium system in the board to the wheat straw powder, and the fiber is crosslinked, so that the toughness of the board is enhanced, and the breaking strength is increased.
The granularity of the blast furnace slag and the granularity of the fly ash have certain influence on the performance of the board, the smaller the granularity is, the area participating in hydration reaction is increased, the generation amount of hydration products is increased, and the strength of the board is favorably improved. But it is not that the finer the granularity of the blast furnace slag and the granularity of the fly ash, the better, after reaching a certain fineness, the strength of the plate is not increased along with the improvement of the fineness of the slag any more, and because the granularity is too small, cracks and gaps inside the slag are welded and compacted in the grinding process, so that the progress of hydration reaction is influenced, and the strength of the plate is not increased along with the improvement of the fineness of the slag any more. The inventor also finds that when the granularity of the blast furnace slag and the granularity of the fly ash are too small, the tensile strength of the plate is reduced, the invention preferably selects the granularity of the fly ash of 100 meshes, the granularity of the blast furnace slag of 10 mu m and the granularity of the wheat straw of 60 meshes, and the prepared plate has better tensile strength and breaking strength.
Meanwhile, the reinforcing material is a mixture consisting of fly ash, wheat straw powder, blast furnace slag, talcum powder and mica powder, the mechanical property of the magnesium-based plant fiber board can be enhanced by adding the mica powder in cooperation with the fly ash, the wheat straw powder and the blast furnace slag, and the magnesium-based plant fiber board is endowed with excellent wear resistance, wear resistance and heat-resistant insulating property.
The polyvinyl alcohol is PVA24-88 polyvinyl alcohol (the content is more than or equal to 99.9 percent), the activating agent is a mixture consisting of calcium hydroxide, polyvinyl alcohol and sodium sulfate, 0.5-1 part of calcium hydroxide, 0.5-1 part of polyvinyl alcohol and 0.5-1 part of sodium sulfate are selected cooperatively, the potential activity of blast furnace slag, coal ash, talcum powder and mica powder can be excited, the formation of stable hydration products and the formation of a network structure of the hydration products are facilitated, and the breaking strength and the tensile strength of the magnesium-based plant fiber board are improved. The inventor finds that when the slag is in an alkaline solution, the slag obviously shows hydraulic performance, the calcium hydroxide, the polyvinyl alcohol and the sodium sulfate have better activation effect through composite activation, the bending strength and the compressive strength of the magnesium-based plant fiber board are improved compared with the single use of the calcium hydroxide, and the improvement range of the bending strength is larger than that of the compressive strength. Probably because the dissolution of the magnesium-based compound, the generation of hydration products and the coagulation and hardening of the slurry are carried out alternately in the hydration process of the magnesium-based compound in the magnesium-based plant fiber board, the polyvinyl alcohol has emulsification effect, the polyvinyl alcohol is doped into the magnesium-based compound in the plant fiber board, and polyvinyl alcohol molecules are adsorbed on the surface of the magnesium-based compound, thereby hindering the coagulation of the magnesium-based compound and generating the suspension stabilization effect.
The modifier is sodium tripolyphosphate, 3-aminopropyl trimethoxy silane and sodium silicate, can adjust the pH value, stabilize chloride ions and prevent the chloride ions from absorbing water and returning halogen.
The foaming agent is sodium bicarbonate, aluminum sulfate and silicon carbide, preferably 0.6-3 parts of sodium bicarbonate, 0.1-0.5 part of aluminum sulfate and 0.5-1 part of silicon carbide, so that the volume of the magnesium-based compound slurry can be effectively increased, the specific gravity of the product is reduced, the airing time is shortened, the production process is shortened, and the cost is reduced under the condition that the strength and the fire resistance of the product are not reduced.
The modifier, the foaming agent, the activator and the reinforcing material have a synergistic effect, so that the magnesium-based plant fiber board has better mechanical property, the breaking strength and the tensile strength reach better levels, the breaking strength is 32.9MPa, the tensile strength is 16.9MPa, the screw holding force reaches 110N/m, and no water drop and no moisture regain exist.
The preparation method disclosed by the invention is simple in preparation process, simple and feasible, convenient and fast to operate, low in cost, free of pollution and suitable for large-scale production.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (3)
1. The production method of the magnesium-based plant fiber board is characterized by comprising the following steps of: comprises the steps of (a) preparing a mixture of a plurality of raw materials,
adding 25 parts of magnesium chloride into 120 parts of water, and uniformly stirring and mixing to obtain a magnesium chloride aqueous solution;
adding 100 parts of magnesium oxide into the magnesium chloride aqueous solution, sequentially adding a reinforcing material, a modifier, an activator and a foaming agent, and mixing to prepare magnesium-based plant fiberboard slurry;
putting the magnesium-based plant fiber board slurry into a mold, laying 1-5 layers of two-dimensional fiber mesh cloth or three-dimensional fiber hollow fabric, and performing roll forming;
curing for 24 hours under natural conditions, demolding, curing for 2 days under the environment that the temperature is 15-30 ℃ and the air humidity is 30-50, cutting and polishing to obtain the magnesium-based plant fiber board; wherein the content of the first and second substances,
the reinforcing material is a mixture consisting of 15 parts of fly ash, 20 parts of wheat straw powder, 15 parts of blast furnace slag, 2 parts of talcum powder and 2 parts of mica powder in parts by mass;
the modifier is a mixture consisting of 2 parts by mass of sodium tripolyphosphate, 1 part by mass of 3-aminopropyl trimethoxysilane and 1 part by mass of sodium silicate;
the activating agent is a mixture consisting of 1 part of calcium hydroxide, 1 part of polyvinyl alcohol and 1 part of sodium sulfate in parts by mass;
the foaming agent is a mixture consisting of sodium bicarbonate, aluminum sulfate and silicon carbide, and the foaming agent comprises 2 parts of sodium bicarbonate, 0.3 part of aluminum sulfate and 0.5 part of silicon carbide in parts by mass;
the granularity of the fly ash is 100 meshes, the granularity of the blast furnace slag is 10 mu m, the granularity of the wheat straw powder is 60 meshes, the granularity of the talcum powder is 0.02mm, and the granularity of the mica powder is 0.01 mm.
2. The method of producing magnesium-based plant fiber sheet according to claim 1, wherein: the magnesium oxide is light-burned magnesium oxide, and the activity of the magnesium oxide is 60-65%.
3. The method for producing a magnesium-based plant fiber sheet as claimed in claim 1 or 2, wherein: the magnesium chloride is one or more of anhydrous magnesium chloride and magnesium chloride hexahydrate.
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| CN112318645B (en) * | 2020-10-30 | 2023-09-05 | 徐州安联木业有限公司 | Environment-friendly flame-retardant plywood preparation device and preparation method thereof |
| US11873252B2 (en) * | 2021-09-23 | 2024-01-16 | Festival Neo Corporation | Bath or kitchen products made from magnesium oxide materials |
| CN114656882A (en) * | 2022-04-15 | 2022-06-24 | 千年舟新材科技集团股份有限公司 | Composite adhesive, flame-retardant wood substrate using composite adhesive and preparation process of flame-retardant wood substrate |
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| CN103113081A (en) * | 2012-03-29 | 2013-05-22 | 刘丰 | Microbubble magnesia cement internal/external wallboard and preparation method thereof |
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| 基于碳酸氢钠及硫酸铝发泡剂的发泡水泥性能研究;胡高远;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20190115;第10页第3段 * |
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