CN116768595A - Light glass magnesium board and manufacturing method thereof - Google Patents
Light glass magnesium board and manufacturing method thereof Download PDFInfo
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- CN116768595A CN116768595A CN202310636089.XA CN202310636089A CN116768595A CN 116768595 A CN116768595 A CN 116768595A CN 202310636089 A CN202310636089 A CN 202310636089A CN 116768595 A CN116768595 A CN 116768595A
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- Prior art keywords
- magnesium
- light
- board
- magnesium silicate
- based filler
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- 239000011777 magnesium Substances 0.000 title claims abstract description 79
- 229910052749 magnesium Inorganic materials 0.000 title claims abstract description 79
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 239000011521 glass Substances 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000000391 magnesium silicate Substances 0.000 claims abstract description 105
- 229910052919 magnesium silicate Inorganic materials 0.000 claims abstract description 105
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 235000019792 magnesium silicate Nutrition 0.000 claims abstract description 101
- 239000000945 filler Substances 0.000 claims abstract description 81
- 238000001027 hydrothermal synthesis Methods 0.000 claims abstract description 44
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 239000011256 inorganic filler Substances 0.000 claims abstract description 13
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 13
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 50
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 48
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 45
- 239000000395 magnesium oxide Substances 0.000 claims description 44
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 24
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 24
- 229920002522 Wood fibre Polymers 0.000 claims description 17
- 239000002025 wood fiber Substances 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 16
- 238000001723 curing Methods 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000000839 emulsion Substances 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052710 silicon Inorganic materials 0.000 claims description 10
- 239000010703 silicon Substances 0.000 claims description 10
- 125000000123 silicon containing inorganic group Chemical group 0.000 claims description 10
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 239000012752 auxiliary agent Substances 0.000 claims description 8
- 239000000701 coagulant Substances 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 8
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 7
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 7
- 241001330002 Bambuseae Species 0.000 claims description 7
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 7
- 239000011425 bamboo Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- 239000002910 solid waste Substances 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 6
- 229910021487 silica fume Inorganic materials 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 239000001509 sodium citrate Substances 0.000 claims description 5
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 239000010433 feldspar Substances 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 4
- DHRRIBDTHFBPNG-UHFFFAOYSA-L magnesium dichloride hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[Cl-].[Cl-] DHRRIBDTHFBPNG-UHFFFAOYSA-L 0.000 claims description 4
- 239000005909 Kieselgur Substances 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 235000015165 citric acid Nutrition 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 239000010902 straw Substances 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 239000002023 wood Substances 0.000 claims description 3
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims description 2
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 2
- 239000010425 asbestos Substances 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 239000002655 kraft paper Substances 0.000 claims description 2
- 239000001630 malic acid Substances 0.000 claims description 2
- 235000011090 malic acid Nutrition 0.000 claims description 2
- 229910052895 riebeckite Inorganic materials 0.000 claims description 2
- 235000011083 sodium citrates Nutrition 0.000 claims description 2
- 235000019830 sodium polyphosphate Nutrition 0.000 claims description 2
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 238000004898 kneading Methods 0.000 claims 1
- 238000007711 solidification Methods 0.000 claims 1
- 230000008023 solidification Effects 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 5
- 231100000252 nontoxic Toxicity 0.000 abstract description 3
- 230000003000 nontoxic effect Effects 0.000 abstract description 3
- 238000005187 foaming Methods 0.000 abstract description 2
- 239000003365 glass fiber Substances 0.000 abstract description 2
- 230000003014 reinforcing effect Effects 0.000 abstract description 2
- 239000011152 fibreglass Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 57
- 239000000835 fiber Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 8
- 239000002994 raw material Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000001878 scanning electron micrograph Methods 0.000 description 3
- 125000005372 silanol group Chemical group 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- NJVOHKFLBKQLIZ-UHFFFAOYSA-N (2-ethenylphenyl) prop-2-enoate Chemical compound C=CC(=O)OC1=CC=CC=C1C=C NJVOHKFLBKQLIZ-UHFFFAOYSA-N 0.000 description 1
- 229910006283 Si—O—H Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010335 hydrothermal treatment Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B2111/30—Nailable or sawable materials
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- 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 belongs to the technical field of inorganic boards, and particularly discloses a light glass magnesium board and a manufacturing method thereof. The light magnesium silicate-based filler generated by hydrothermal reaction under specific conditions is used as a light component in the light magnesium silicate-based filler, and the performance advantages of large specific surface area, light apparent density and high compressive strength can be fully utilized; as an inorganic filler, the glass fiber-reinforced plastic composite board is different from glass fiber and foaming slurry, is nontoxic and harmless to human bodies, has good compatibility with an inorganic system of a glass magnesium board, can effectively reduce the density of the board, and does not influence the internal bonding strength of the board when being added into the glass magnesium board. The light magnesium silicate-based filler has good compatibility with a glass magnesium plate, can be uniformly dispersed in the glass magnesium plate, and plays a role in density reduction. In addition, along with the extension of the curing age of the obtained light magnesium silicate board, the light magnesium silicate-based filler can be further hydrated, the compressive strength is gradually improved, and the light magnesium silicate-based filler has a remarkable reinforcing effect on the mechanical property of the light magnesium silicate board.
Description
Technical Field
The invention belongs to the technical field of inorganic boards, and particularly relates to a light-weight glass magnesium board and a manufacturing method thereof.
Background
With the implementation of GB50222-2017 'fireproof Specification for the design of interior decoration of buildings', the fireproof requirements of building materials are increasingly strict, the market competition is more and more vigorous, and higher requirements are also put forward on the performance of plates.
As a building material which is non-combustible, environment-friendly, nontoxic, odorless, insect-proof, mothproof and long in service life, the glass magnesium board has an increasing annual demand at a speed of 15%, and has excellent market prospect. However, the density of the glass magnesium board is generally 1.2t/m 3 Above, far exceeding wood boards and light calcium silicate boards, is unfavorable for transportation and installation, thereby limiting the application thereof in the field of high-end boards.
Therefore, the realization of light weight and high strength of the glass magnesium board is a key for promoting the application of the glass magnesium board in the field of high-end functional boards.
Disclosure of Invention
In order to solve the problems of the prior art, the invention provides a novel light magnesium silicate board, which takes light magnesium silicate base filler as light filler, and utilizes the advantages of large specific surface area, light apparent density, high compressive strength, good compatibility with an inorganic system of the magnesium silicate board and the like of the light magnesium silicate base filler, and the light magnesium silicate base filler can be added into the magnesium silicate board to effectively reduce the density of the board without affecting the internal bonding strength of the board.
The invention adopts the following technical scheme:
a light-weight glass-magnesium board is prepared from light magnesium silicate base filler, magnesium sulfate, magnesium oxide, inorganic filler, coagulant, organic functional assistant and water through mixing, injection moulding, curing and solidifying.
Wherein, the light magnesium silicate-based filler is prepared by mixing silicon-containing inorganic matters and magnesium-containing inorganic matters according to the proportion of 1:1-3 of the mass ratio of silicon to magnesium, and carrying out hydrothermal reaction for 1 h-5 h at the temperature of 140 ℃ to 220 ℃ and the stirring speed of 100rpm to 800 rpm.
The light magnesium silicate-based filler generated by the hydrothermal reaction under specific conditions is used as a light component in the light magnesium silicate board, the performance advantages of large specific surface area, light apparent density and high compressive strength can be fully utilized, meanwhile, the light magnesium silicate-based filler is used as an inorganic filler, has good compatibility with an inorganic system of the magnesium silicate board, and can not only effectively reduce the density of the board, but also not influence the internal bonding strength of the board.
In addition, the light magnesium silicate-based filler is different from glass fibers and foaming slurry, is nontoxic and harmless to human bodies, has good compatibility with a glass magnesium plate, can be uniformly dispersed in the glass magnesium plate, and plays a role in reducing density. Meanwhile, as the curing age of the obtained light magnesium silicate board is prolonged, the light magnesium silicate-based filler is further hydrated, the compressive strength is gradually improved, and the light magnesium silicate-based filler has a remarkable reinforcing effect on the mechanical properties of the light magnesium silicate board.
Preferably, the light magnesium silicate-based filler may be prepared by mixing a silicon-containing inorganic substance and a magnesium-containing inorganic substance into wood fibers and performing a hydrothermal reaction. In this way, the silicon source in the formed magnesium silicate is capable of forming a silanol structure (Si-O-H) with hydroxyl groups on the surface of the wood fibers, thereby grafting the formed magnesium silicate onto the wood fibers to form a fiber-magnesium silicate composite.
Further, wood fiber is formed by rubbing and grinding straw, wood, waste kraft paper, bamboo and the like, and the length-diameter ratio is more than 20.
The fiber-magnesium silicate composite material is filled in the glass magnesium board by utilizing the advantage of high length-diameter ratio of wood fibers, so that the flexural strength and screw holding force of the board can be further enhanced, and the density of the board is reduced. Meanwhile, compared with the strengthening rib effect exerted by the toughening method of directly adding wood fiber into the glass magnesium plate, the mode of doping the wood fiber in a mode of preparing the light filler has better interface compatibility with the inorganic plate after the wood fiber is connected with the magnesium silicate filler through a silanol structure.
Further, the addition amount of the wood fiber is controlled to be 5% -20% of the total mass of the silicon-containing inorganic matters and the magnesium-containing inorganic matters.
Preferably, the silicon-containing inorganic matter is silicon-containing industrial solid waste, such as one or a mixture of at least two of silica fume, fly ash, feldspar powder, asbestos tailings and magnesium slag; the magnesium-containing inorganic substance is one or a mixture of at least two of magnesium slag, deactivated magnesium oxide and bischofite slag.
Industrial solid waste is used as a source of inorganic matters containing silicon and inorganic matters containing magnesium, a way of changing waste into valuable is provided for the bulk industrial solid waste, the economic additional value is improved, and the environmental pollution is reduced. In addition, the recycling mode of the light magnesium silicate-based filler prepared by the hydrothermal treatment plays a role of a compact plate which plays a role of light weight instead of a direct doping mode.
In the slurry, the mass ratio of the active magnesium oxide to the magnesium sulfate in the magnesium oxide is 5-7:1; the dosage of the light magnesium silicate-based filler is 5-70% of the total mass of magnesium oxide and magnesium sulfate, preferably 10-40%; the dosage of the inorganic filler is 1 to 5 percent of the total mass of the magnesium oxide and the magnesium sulfate; the dosage of the coagulant is 0.2-1% of the total mass of the magnesium oxide and the magnesium sulfate; the dosage of the organic functional auxiliary agent is 0.5-5% of the total mass of the magnesium oxide and the magnesium sulfate.
Further, the inorganic filler is any one or a mixture of at least two of bentonite, diatomite and fly ash; the coagulant regulator is any one or a mixture of at least two of citric acid, sodium citrate, malic acid and sodium polyphosphate; the organic functional auxiliary agent is any one or a mixture of at least two of acrylic emulsion, silicone-acrylate emulsion, pure acrylic emulsion, styrene-acrylate emulsion and epoxy resin.
The preparation method of the light glass magnesium board provided by the invention comprises the following steps:
and S1, preparing the light magnesium silicate-based filler.
Specifically, the silicon-containing inorganic matters and the magnesium-containing inorganic matters are mixed according to the proportion of 1:1-3 of the mass ratio of silicon to magnesium, and the hydrothermal reaction is carried out for 1-5 h at the temperature of 140-220 ℃ and the stirring speed of 100-800 rpm, and the product of the hydrothermal reaction is washed, filtered and dried to obtain the light magnesium silicate-based filler.
And S2, preparing plate-making slurry.
Specifically, the light magnesium silicate-based filler prepared in the step S1 is uniformly mixed with magnesium sulfate, magnesium oxide, inorganic filler, a coagulant, an organic functional auxiliary agent and water to obtain the plate-making slurry.
Wherein, the ratio of the amount of the substances of the active magnesium oxide and the magnesium sulfate in the magnesium oxide is controlled to be 5-7:1; the dosage of the light magnesium silicate-based filler is 5-70% of the total mass of magnesium oxide and magnesium sulfate, preferably 10-40%; the dosage of the inorganic filler is 1 to 5 percent of the total mass of the magnesium oxide and the magnesium sulfate; the dosage of the coagulant is 0.2% -1% of the total mass of magnesium oxide and magnesium sulfate; the dosage of the organic functional auxiliary agent is 0.5-5% of the total mass of the magnesium oxide and the magnesium sulfate.
And S3, injection molding of the slurry and preparation of the slab.
Specifically, the slurry obtained in the step S2 is injected into a mold, and is maintained under the condition of proper temperature and humidity, and is cured and molded to obtain the glass magnesium board blank.
Generally, curing conditions are 20-60 ℃ and curing is carried out for 7-28 days under the humidity of 60% + -5% RH.
And S4, drying, sanding and cutting the glass magnesium board blank to obtain the light glass magnesium board.
Preferably, in the preparation of the light magnesium silicate-based filler of the above step S1, wood fibers may be simultaneously added thereto to participate in the hydrothermal reaction, so as to further reduce the apparent density of the obtained light magnesium silicate-based filler.
In general, in the hydrothermal reaction in the step S1, the water consumption for the hydrothermal reaction may be controlled to 15 to 30 times the total mass of the silicon-containing inorganic substance and the magnesium-containing inorganic substance.
Drawings
FIG. 1 is an SEM image of a light magnesium silicate-based inorganic filler provided according to example 4 of the invention;
FIG. 2 is an SEM image of a light magnesium silicate-based inorganic filler provided according to example 3 of the invention;
fig. 3 is an SEM image of a comparative magnesium silicate-based filler provided in comparative example 4 according to the present invention.
Detailed Description
The following description of the technical solution in the embodiments of the present invention is clear and complete. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The embodiment provides a light-weight glass magnesium board and a manufacturing method thereof.
First, silica fume (SiO 2 52% by mass) and deactivated magnesium oxide (65% by mass of MgO) as raw materials; 172g of silica fume, 95g of inactivated magnesia powder, 4400g of water and 15g of straw fiber are weighed, and hydrothermal reaction is carried out for 4 hours at the temperature of 150 ℃ by controlling the stirring speed of 400 rpm.
And then, washing, filtering and drying the product after the hydrothermal reaction to obtain the white light magnesium silicate-based filler.
Then, 188g of the light magnesium silicate-based filler, 500g of magnesium sulfate, 1388.9g of magnesium oxide (activity 60%), 18.9g of bentonite, 3.8g of citric acid and 9.45g of acrylic emulsion were weighed and stirred uniformly in 730g of water to prepare a slurry.
And fourthly, injecting the slurry into a mold with the thickness of 50cm multiplied by 50cm, curing for 14d at the temperature of 30 ℃ and under the humidity condition of 60% RH, and curing and forming to obtain the glass magnesium board blank.
Finally, the glass magnesium board blank is dried, sanded and cut to obtain the light glass magnesium board.
Example 2
The embodiment provides a light-weight glass magnesium board and a manufacturing method thereof.
First, fly ash (SiO) 2 55% by mass) and bischofite (MgCl) 2 90% by mass) asRaw materials; 420g of fly ash, 500g of bischofite, 16200g of water and 180g of wood fiber are weighed, and the hydrothermal reaction is carried out for 1h at 220 ℃ by controlling the stirring speed of 800 rpm.
And then, washing, filtering and drying the product after the hydrothermal reaction to obtain the white light magnesium silicate-based filler.
Next, 168g of the light magnesium silicate-based filler, 500g of magnesium sulfate, 1667g of magnesium oxide (activity 70%), 21.7g of diatomaceous earth, 4.34g of sodium citrate, and 90g of epoxy resin were weighed and stirred uniformly in 1070g of water to prepare a slurry.
And fourthly, injecting the slurry into a mold with the thickness of 50cm multiplied by 50cm, curing for 7d at the temperature of 60 ℃ and under the humidity condition of 65% RH, and curing and forming to obtain the glass magnesium board blank.
Finally, the glass magnesium board blank is dried, sanded and cut to obtain the light glass magnesium board.
Example 3
The embodiment provides a light-weight glass magnesium board and a manufacturing method thereof.
Firstly, feldspar powder (SiO 2 76% by mass and magnesium slag (40% by mass of MgO) as raw materials; 300g of feldspar powder, 651g of magnesium slag, 14270g of water and 95g of bamboo fiber are weighed, and hydrothermal reaction is carried out for 3 hours at the temperature of 200 ℃ by controlling the stirring speed of 600 rpm.
And then, washing, filtering and drying the product after the hydrothermal reaction to obtain the white light magnesium silicate-based filler.
Then, 780g of the light magnesium silicate-based filler, 450g of magnesium sulfate, 1500g of magnesium oxide (with the activity of 70%), 97g of fly ash, 19g of sodium citrate and 58g of styrene-acrylic emulsion were weighed and stirred uniformly in 1200g of water to prepare a slurry.
And fourthly, injecting the slurry into a mold with the thickness of 50cm multiplied by 50cm, curing for 14d at the temperature of 40 ℃ and under the humidity condition of 65% RH, and curing and forming to obtain the glass magnesium board blank.
Finally, the glass magnesium board blank is dried, sanded and cut to obtain the light glass magnesium board.
Example 4
The embodiment provides a light-weight glass magnesium board and a manufacturing method thereof.
The same points as those of embodiment 3 are not described here, and only the differences from embodiment 3 are described. This example differs from example 3 in that in the hydrothermal reaction for the first step of preparing the light magnesium silicate-based filler, bamboo fibers are absent as a raw material; a lightweight glass magnesium board was produced as described in example 3.
In order to embody the necessity of each process in the components and the manufacturing method thereof, a plurality of comparison experiments are carried out.
Example 5
The embodiment provides a light-weight glass magnesium board and a manufacturing method thereof.
First, silica fume (SiO 2 80% by mass) and deactivated magnesium oxide (MgO 85% by mass) as raw materials; 1200g of silica fume, 2250g of deactivated magnesium oxide, 103500g of water and 1800g of wood fiber are weighed, and hydrothermal reaction is carried out for 5 hours at 140 ℃ by controlling the stirring speed of 100 rpm.
And then, washing, filtering and drying the product after the hydrothermal reaction to obtain the white light magnesium silicate-based filler.
Next, 2487g of the light magnesium silicate-based filler, 700g of magnesium sulfate, 1667g of magnesium oxide (activity 70%), 21.7g of diatomaceous earth, 4.34g of sodium citrate, and 118g of acrylic emulsion were weighed and stirred uniformly in 1070g of water to prepare a slurry.
And fourthly, injecting the slurry into a mold with the thickness of 50cm multiplied by 50cm, curing for 7d at the temperature of 60 ℃ and under the humidity condition of 65% RH, and curing and forming to obtain the glass magnesium board blank.
Finally, the glass magnesium board blank is dried, sanded and cut to obtain the light glass magnesium board.
Comparative example 1
This comparative example is intended to illustrate the importance of a light magnesium silicate-based filler in a light magnesium silicate board by providing an experiment lacking the light magnesium silicate-based filler as compared with example 4.
This comparative example is the same as example 4 and will not be described again, and only the differences from example 4 will be described. This comparative example differs from example 4 in that the light magnesium silicate-based filler is absent from the raw materials for making this comparative example; the remainder was as described with reference to example 4, a first comparative magnesium oxide panel was obtained.
Comparative example 2
This comparative example was conducted by setting an experiment for adjusting the addition mode of wood fiber as compared with example 3, and was intended to illustrate the effect of the addition mode of wood fiber on the performance of a magnesium board.
This comparative example is the same as example 3 and will not be described again, and only the differences from example 3 will be described. This comparative example is different from example 3 in that, in the raw material for producing the light magnesium silicate-based filler of this comparative example, bamboo fibers are absent, but an equal amount of bamboo fibers is directly added to the preparation of the slurry so that the bamboo fibers form a glass magnesium board by direct doping; a second comparative magnesium oxide panel was obtained as described with reference to example 3.
Comparative example 3
This comparative example is intended to illustrate the importance of light magnesium silicate-based fillers synthesized by specific hydrothermal reactions in the light magnesium silicate panels by providing an experiment in which commercially available conventional magnesium silicate was substituted for the light magnesium silicate-based fillers synthesized by specific hydrothermal reactions as compared with example 4.
This comparative example is the same as example 4 and will not be described again, and only the differences from example 4 will be described. This comparative example differs from example 4 in that in the raw materials for making this comparative example, the light magnesium silicate-based filler is replaced with an equivalent amount of magnesium sulfate; a third comparative magnesium oxide panel was obtained as described with reference to example 4.
Comparative example 4
This comparative example is intended to illustrate the importance of the hydrothermal synthesis temperature of the light magnesium silicate-based filler in the light magnesium silicate board by an experiment of lowering the temperature of the hydrothermal synthesis of the light magnesium silicate-based filler as compared with example 4.
This comparative example is the same as example 4 and will not be described again, and only the differences from example 4 will be described. The present comparative example is different from example 4 in that in the production of the present comparative example, in the hydrothermal synthesis of the light magnesium silicate-based filler, the hydrothermal reaction temperature was lowered to 120 ℃ to obtain a comparative magnesium silicate-based filler; a fourth comparative magnesium oxide panel was obtained as described with reference to example 4.
Comparative example 5
This comparative example is intended to illustrate the importance of the hydrothermal synthesis temperature of the light magnesium silicate-based filler in the light magnesium silicate board by an experiment of increasing the temperature of the hydrothermal synthesis of the light magnesium silicate-based filler as compared with example 4.
This comparative example is the same as example 4 and will not be described again, and only the differences from example 4 will be described. This comparative example differs from example 4 in that in the production of this comparative example, in the hydrothermal synthesis of the light magnesium silicate-based filler, the hydrothermal reaction temperature is raised to 240 ℃ to obtain a comparative magnesium silicate-based filler; a fifth comparative magnesium oxide panel was obtained as described with reference to example 4.
Comparative example 6
This comparative example is intended to illustrate the importance of the stirring rate during hydrothermal synthesis of a light magnesium silicate-based filler in a light magnesium silicate board by an experiment of reducing the stirring rate of the hydrothermal synthesis of the light magnesium silicate-based filler as compared with example 4.
This comparative example is the same as example 4 and will not be described again, and only the differences from example 4 will be described. This comparative example differs from example 4 in that in the production of this comparative example, in the hydrothermal synthesis of the light magnesium silicate-based filler, the stirring rate in the hydrothermal reaction was reduced to 50rpm, to obtain a comparative magnesium silicate-based filler; a sixth comparative magnesium oxide panel was obtained as described with reference to example 4.
Comparative example 7
This comparative example is intended to illustrate the importance of the stirring rate during hydrothermal synthesis of a light magnesium silicate-based filler in a light magnesium silicate board by an experiment that accelerates the stirring rate of the hydrothermal synthesis of the light magnesium silicate-based filler as compared with example 4.
This comparative example is the same as example 4 and will not be described again, and only the differences from example 4 will be described. The present comparative example is different from example 4 in that in the production of the present comparative example, in the hydrothermal synthesis of the light magnesium silicate-based filler, the stirring rate in the hydrothermal reaction is accelerated to 1000rpm, to obtain a comparative magnesium silicate-based filler; a seventh comparative magnesium oxide panel was obtained as described with reference to example 4.
The physical and chemical properties of the magnesium oxide panels provided in the above examples and comparative examples were tested, and the test results are shown in table 1 below.
Table 1 physicochemical properties of the magnesium oxide sheet provided in each example and comparative example
As can be seen from a comparison of comparative example 1 and example 4, the density of the glass magnesium board without the light magnesium silicate-based filler of the present invention is as high as 1.32g/cm 3 The density of the added corresponding glass magnesium board is only 1.03g/cm 3 The density is reduced by about 22 percent, and the aim of light weight is fulfilled. Meanwhile, the 7d and 14d flexural strength of the glass magnesium board is obviously improved after the light magnesium silicate base filler is added; the light magnesium silicate-based filler has a porous and fluffy structure, as shown in fig. 1, can effectively reduce the density of the plate, has a similar film forming effect along with the extension of the curing period, is filled in the gaps of the glass magnesium plate, and improves the mechanical property of the glass magnesium plate.
As can be seen from comparison of comparative example 2 and example 3, the fiber is hydrothermally formed into a fiber-magnesium silicate composite light magnesium silicate-based filler, which is then added to a magnesium oxide board, and the effect is better than that of directly adding the fiber to the magnesium oxide board. This is because hydroxyl groups on the surface of the fiber form silanol structures with silicon-containing industrial solid wastes during hydrothermal process, so that magnesium silicate is formed on the surface of the fiber, as shown in fig. 2. The fiber-magnesium silicate composite material is added into the glass magnesium board, and is easy to be uniformly mixed with inorganic materials of the glass magnesium board, thereby being beneficial to obtaining better mechanical properties.
As can be seen from comparison of comparative example 3 and example 4, the addition of commercially available magnesium silicate does not function as a light filler, since commercially available magnesium silicate is mostly a talc material, and crystals are pseudo-hexagonal or diamond-shaped sheets having a specific gravity as high as 2.7 to 2.8, and the light characteristic of the light magnesium silicate-based filler synthesized by a specific hydrothermal reaction in the present invention is not present, and thus the density reduction of a glass magnesium plate is adversely affected.
It can be seen by comparing comparative examples 4, 5 with example 4 that either too high or too low a hydrothermal reaction temperature has an adverse effect on the formation of the light magnesium silicate-based filler during the preparation of the light magnesium silicate-based filler. The temperature was too low and the reaction was not complete, and as can be seen from FIG. 3, more unreacted silica spherical particles were also present in the comparative magnesium silicate-based filler. Similarly, when the reaction temperature is too high, the crystallinity of the magnesium silicate-based filler is improved and the compactness is improved, so that the filler does not have the characteristic of light weight.
It can be seen from comparison of comparative examples 6 and 7 with example 4 that the stirring rate was too slow during the hydrothermal preparation of the light magnesium silicate-based filler, and the comparative magnesium silicate-based filler was easily agglomerated and easily clogged the discharge hole of the hydrothermal reaction apparatus. The stirring speed is too high, so that the formed contrast magnesium silicate-based filler has smaller particle size, high crystallinity and large bulk density, and unnecessary energy consumption is caused on the other hand.
Claims (8)
1. A light glass magnesium board is characterized in that the light glass magnesium board is obtained by injection molding, curing and solidification of slurry obtained by uniformly mixing light magnesium silicate-based filler, magnesium sulfate, magnesium oxide, inorganic filler, coagulant, organic functional auxiliary agent and water;
wherein, the light magnesium silicate-based filler is prepared by mixing silicon-containing inorganic matters and magnesium-containing inorganic matters according to the proportion of 1:1-3 of the mass ratio of silicon to magnesium, and carrying out hydrothermal reaction for 1 h-5 h at the temperature of 140 ℃ to 220 ℃ and the stirring speed of 100rpm to 800 rpm.
2. The lightweight magnesium silicate-based panel according to claim 1, wherein the lightweight magnesium silicate-based filler is produced by incorporating wood fibers into the silicon-containing inorganic substance and the magnesium-containing inorganic substance in a hydrothermal reaction.
3. The light magnesium oxide board according to claim 2, wherein the wood fiber is formed by kneading and grinding straw, wood, waste kraft paper, bamboo and the like, and the length-diameter ratio is more than 20; and/or the addition amount of the wood fiber is 5-20% of the total mass of the siliceous inorganic matter and the magnesia inorganic matter.
4. A lightweight magnesium oxide board according to any one of claims 1 to 3, wherein in the slurry, the ratio of the amounts of active magnesium oxide and magnesium sulfate in the magnesium oxide is 5 to 7:1; the dosage of the light magnesium silicate-based filler is 5-70% of the total mass of the magnesium oxide and the magnesium sulfate; the dosage of the inorganic filler is 1-5% of the total mass of the magnesium oxide and the magnesium sulfate; the dosage of the coagulant is 0.2-1% of the total mass of the magnesium oxide and the magnesium sulfate; the dosage of the organic functional auxiliary agent is 0.5-5% of the total mass of the magnesium oxide and the magnesium sulfate.
5. The lightweight magnesium oxide board according to claim 4, wherein the silicon-containing inorganic substance is silicon-containing industrial solid waste and the magnesium-containing inorganic substance is magnesium-containing industrial solid waste.
6. The lightweight magnesium oxide board according to claim 5, wherein the silicon-containing industrial solid waste is at least one selected from the group consisting of silica fume, fly ash, feldspar powder, asbestos tailings, and magnesium slag; the magnesium-containing inorganic matter is at least one selected from magnesium slag, deactivated magnesia and bischofite slag.
7. The lightweight magnesium board according to claim 4, wherein the inorganic filler is at least one selected from bentonite, diatomaceous earth, fly ash; the coagulation regulator is at least one selected from citric acid, sodium citrate, malic acid and sodium polyphosphate; the organic functional auxiliary agent is at least one selected from acrylic emulsion, silicone-acrylic emulsion, pure acrylic emulsion, styrene-acrylic emulsion and epoxy resin.
8. The method for manufacturing the light-weight glass magnesium board according to any one of claims 1 to 7, comprising the steps of:
s1, preparing a light magnesium silicate-based filler: mixing the silicon-containing inorganic matters and the magnesium-containing inorganic matters according to the proportion of 1:1-3 of the mass ratio of silicon to magnesium, carrying out hydrothermal reaction for 1-5 h at the temperature of 140-220 ℃ and the stirring speed of 100-800 rpm, and washing, filtering and drying the product of the hydrothermal reaction to obtain the light magnesium silicate-based filler;
s2, preparing plate-making slurry: uniformly mixing the light magnesium silicate-based filler with magnesium sulfate, magnesium oxide, inorganic filler, a coagulant, an organic functional auxiliary agent and water to obtain a plate-making slurry;
s3, injection molding of slurry and preparation of a plate blank: injecting the slurry into a mold, curing and forming to obtain a glass magnesium board blank;
and S4, drying, sanding and cutting the glass magnesium board blank to obtain the light glass magnesium board.
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