CN116589259A - Mildew-proof high-strength high-toughness paper gypsum board and preparation method thereof - Google Patents
Mildew-proof high-strength high-toughness paper gypsum board and preparation method thereof Download PDFInfo
- Publication number
- CN116589259A CN116589259A CN202310630736.6A CN202310630736A CN116589259A CN 116589259 A CN116589259 A CN 116589259A CN 202310630736 A CN202310630736 A CN 202310630736A CN 116589259 A CN116589259 A CN 116589259A
- Authority
- CN
- China
- Prior art keywords
- gypsum board
- parts
- mildew
- paper
- toughness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000010440 gypsum Substances 0.000 title claims abstract description 97
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 97
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000002131 composite material Substances 0.000 claims abstract description 50
- 229920000881 Modified starch Polymers 0.000 claims abstract description 44
- 239000004368 Modified starch Substances 0.000 claims abstract description 44
- 235000019426 modified starch Nutrition 0.000 claims abstract description 44
- 239000000835 fiber Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 41
- 239000004113 Sepiolite Substances 0.000 claims abstract description 15
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 15
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 15
- 229920001661 Chitosan Polymers 0.000 claims abstract description 13
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 239000004088 foaming agent Substances 0.000 claims abstract description 11
- 239000003365 glass fiber Substances 0.000 claims description 28
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 24
- 229920002522 Wood fibre Polymers 0.000 claims description 24
- 238000002156 mixing Methods 0.000 claims description 24
- 239000002025 wood fiber Substances 0.000 claims description 24
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 20
- 239000011701 zinc Substances 0.000 claims description 20
- 229910052725 zinc Inorganic materials 0.000 claims description 20
- 239000011259 mixed solution Substances 0.000 claims description 18
- 239000002253 acid Substances 0.000 claims description 17
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 16
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 16
- 230000002378 acidificating effect Effects 0.000 claims description 13
- 239000000243 solution Substances 0.000 claims description 13
- 239000000126 substance Substances 0.000 claims description 13
- 230000008878 coupling Effects 0.000 claims description 11
- 238000010168 coupling process Methods 0.000 claims description 11
- 238000005859 coupling reaction Methods 0.000 claims description 11
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 10
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- 229920005646 polycarboxylate Polymers 0.000 claims description 9
- 238000009966 trimming Methods 0.000 claims description 9
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 238000005530 etching Methods 0.000 claims description 4
- 102000004169 proteins and genes Human genes 0.000 claims description 4
- 108090000623 proteins and genes Proteins 0.000 claims description 4
- 229910019142 PO4 Inorganic materials 0.000 claims description 3
- 150000002191 fatty alcohols Chemical class 0.000 claims description 3
- 150000007524 organic acids Chemical class 0.000 claims description 3
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 3
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims 1
- 235000005985 organic acids Nutrition 0.000 claims 1
- 235000021317 phosphate Nutrition 0.000 claims 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 claims 1
- 238000005336 cracking Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 8
- 239000008030 superplasticizer Substances 0.000 description 6
- 238000002791 soaking Methods 0.000 description 5
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 241000132536 Cirsium Species 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- -1 alkenyl sulfonate Chemical compound 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000000843 anti-fungal effect Effects 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 229940121375 antifungal agent Drugs 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000010907 mechanical stirring Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009736 wetting Methods 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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/07—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor
- E04F13/08—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements
- E04F13/0866—Coverings or linings, e.g. for walls or ceilings composed of covering or lining elements; Sub-structures therefor; Fastening means therefor composed of a plurality of similar covering or lining elements composed of several layers, e.g. sandwich panels or layered panels
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00612—Uses not provided for elsewhere in C04B2111/00 as one or more layers of a layered structure
- C04B2111/0062—Gypsum-paper board like 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2092—Resistance against biological degradation
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent 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
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- 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
Abstract
The invention belongs to the technical field of gypsum boards, and relates to a mildew-proof high-strength high-toughness paper gypsum board and a preparation method thereof. The prepared paper gypsum board comprises 65-80 parts of desulfurized gypsum, 10-20 parts of composite fibers, 5-10 parts of sepiolite fibers, 10-15 parts of composite modified starch, 0.02-0.04 part of retarder, 0.1-0.5 part of foaming agent, 0.1-0.5 part of water reducer, 1-3 parts of chitosan, 60-85 parts of water and facing paper. The gypsum board prepared by the invention has the properties of high strength, high toughness and mildew resistance, and has no deformation, cracking and mildew under the use condition of a wet area.
Description
Technical Field
The invention belongs to the technical field of gypsum boards, and particularly relates to a mildew-proof high-strength high-toughness paper gypsum board and a preparation method thereof.
Background
The paper gypsum board uses gypsum as main raw material and has the characteristics of good fire resistance, light weight, convenient construction, good heat preservation performance, small expansion and contraction, low production energy consumption and the like. Gypsum board varieties and functions are many such as: ordinary gypsum board, waterproof gypsum board, formaldehyde-resistant gypsum board, perforated gypsum board and fire-resistant gypsum board; the gypsum board is reasonably selected according to the required functions, and the waterproof gypsum board should be selected in wet areas such as a bathroom, etc., if the common gypsum board is selected for a long time, the gypsum board will crack and mildew and even fall off. The perforated gypsum board with good sound absorption performance should be selected in places such as music halls, libraries and the like.
The thickness of the thistle board is divided into 25 mm, 21 mm, 18 mm, 15 mm, 12 mm and 9.5 mm, and the thistle board with the thickness of 9.5 mm is commonly used in suspended ceiling construction in China; in the northern environment, in wet areas such as toilets, gypsum boards 9.5 and mm are often deformed, cracked and mildewed due to repeated wetting, and even if the existing waterproof gypsum board is used, the gypsum board cannot be prevented from being deformed or even cracked, and moisture enters at the cracked part to cause mildewing, so that the service life of the gypsum board is greatly prolonged.
Disclosure of Invention
In view of the problems existing in the prior art, the invention provides a mildew-proof high-strength high-toughness paper gypsum board and a preparation method thereof. The gypsum board prepared by the invention has the properties of high strength, high toughness and mildew resistance, and has no deformation, cracking and mildew under the use condition of a wet area.
In order to solve the technical problems, the invention specifically provides the following technical scheme.
The mildew-proof high-strength high-toughness paper gypsum board comprises the following components in parts by weight:
65-80 parts of desulfurized gypsum, 10-20 parts of composite fiber, 5-10 parts of sepiolite fiber, 10-15 parts of composite modified starch, 0.02-0.04 part of retarder, 0.1-0.5 part of foaming agent, 0.1-0.5 part of water reducer, 1-3 parts of chitosan, 60-85 parts of water and facing paper.
Further, the desulfurized gypsum is 80-100 meshes.
Further, the preparation method of the composite fiber comprises the following steps: and (3) immersing the glass fiber in an acidic chemical solution for etching for 3-5 minutes, washing with clear water for 2-3 times, adding a silane coupling agent and the high-temperature sterilized wood fiber, and coupling to obtain the composite fiber.
Further, the mass ratio of the glass fiber to the wood fiber is 1 (1-2).
Further, the acidic chemical solution is hydrofluoric acid with the mass ratio: ammonium fluoride: acetic acid=2:5:5.
Further, the composite modified starch is obtained by coupling nano zinc and acid modified starch through a silane coupling agent, and the mass ratio of the nano zinc to the acid modified starch is 1: (2-3).
Further, the retarder is any one or a combination of more of organic acid, soluble salt thereof, alkaline phosphate and proteins.
Further, the foaming agent is one or a combination of more of sodium dodecyl sulfate, sodium fatty alcohol polyoxyethylene ether sulfate, alpha-sodium alkenyl sulfonate and hydrogen peroxide.
Further, the water reducer is a polycarboxylate water reducer.
A preparation method of a mildew-proof high-strength high-toughness paper gypsum board specifically comprises the following steps:
step 1, uniformly mixing desulfurized gypsum, composite fibers, sepiolite fibers and water mechanically to obtain a mixed solution;
step 2, mechanically and uniformly mixing the mixed solution obtained in the step 1, composite modified starch, a foaming agent, a retarder, a water reducing agent and chitosan to obtain a mixed material;
and 3, pouring the mixture obtained in the step 2 into a flat plate forming machine pressed with the facing paper, attaching a layer of the facing paper on the surface for forming, keeping the forming temperature at 40+/-2 ℃ all the time, and then drying, cutting and trimming to obtain the paper gypsum board.
Further, the mechanical mixing rotating speed is 400-900r/min, and the stirring time is 10-20min.
Compared with the prior art, the invention has the beneficial effects that.
1. The glass fiber has the characteristic of non-water absorption, so that the time for evaporating water of the gypsum board when meeting water can be shortened, and the possibility of generating mould is reduced, therefore, the glass fiber not only has the functions of enhancing the strength and toughness in the gypsum component, but also indirectly has the waterproof and mildew-proof effects, but has poor dispersibility in the gypsum component through conventional mechanical stirring; according to the invention, the self-made acidic chemical solution is used for chemically etching the glass fiber to form the concave or micropore on the surface, the wood fiber is coupled with the glass fiber by using the coupling agent, the wood fiber and the wood fiber are combined more firmly, the strength and toughness of the formed composite fiber are higher than those of the formed composite fiber which is directly added, and the glass fiber is dispersed more uniformly in the system.
2. The acidic chemical solution used in the invention not only can etch glass fibers, but also maintains original mechanical properties of the glass fibers, and solves the problem that the mechanical properties of the glass fibers are greatly reduced after the glass fibers are etched by the traditional acidic solution such as sulfuric acid.
3. The wood fiber can kill mould at high temperature, and prevent the mould carried by the wood fiber from causing the gypsum board to mould and deteriorate from the inside.
4. The desulfurized gypsum, the composite fiber and the sepiolite fiber are mutually matched to form a compact and complex framework integrally, so that the strength and toughness of the gypsum board are further enhanced; the sepiolite fiber can expand to block the pores after absorbing water, thereby playing a certain role in water resistance.
5. Under the molding condition of 40 ℃, the modified starch can migrate to the surface of the facing paper to the greatest extent, and the adhesiveness of the facing paper can be further improved; the modified starch and the nano zinc are coupled, the nano zinc migrates to the surface of the facing paper along with the modified starch, and the mildew erosion is furthest resisted at the first time when the paper gypsum board is contacted with air, and the mildew is resisted at the first time because the mildew in the interior evaporated water slowly enters and can go moldy under the nourishment of the water.
6. The paper gypsum board prepared by the invention has high strength and toughness, has a certain waterproof effect, does not deform or crack in repeated wet environments in the north, and mold cannot enter the gypsum board along with cracks; because the mould enters the interior of the board to absorb enough moisture, mould spores can be greatly proliferated in the gypsum board core, and mould spots appear; the surface of the gypsum board has the function of resisting mould, so that the mould is prevented from damaging the surface of the board; the service life of the paper gypsum board in the repeated humid environment is greatly prolonged.
Detailed Description
Some embodiments of the invention are disclosed below and one skilled in the art can, based on the disclosure herein, suitably modify the process parameters to achieve this. It is expressly noted that all such similar substitutions and modifications will be apparent to those skilled in the art, and are deemed to be included in the present invention. While the methods and applications of this invention have been described in terms of preferred embodiments, it will be apparent to those skilled in the relevant art that variations and modifications can be made in the methods and applications described herein, and in the practice and application of the techniques of this invention, without departing from the spirit or scope of the invention.
The mildew-proof high-strength high-toughness paper gypsum board comprises the following components in parts by weight:
65-80 parts of desulfurized gypsum, 10-20 parts of composite fiber, 5-10 parts of sepiolite fiber, 10-15 parts of composite modified starch, 0.02-0.04 part of retarder, 0.1-0.5 part of foaming agent, 0.1-0.5 part of water reducer, 1-3 parts of chitosan, 60-85 parts of water and facing paper.
Further, the desulfurized gypsum is 80-100 meshes.
Further, the preparation method of the composite fiber comprises the following steps: and (3) immersing the glass fiber in an acidic chemical solution for etching for 3-5 minutes, washing with clear water for 2-3 times, adding a silane coupling agent and the high-temperature sterilized wood fiber, and coupling to obtain the composite fiber.
Further, the mass ratio of the glass fiber to the wood fiber is 1 (1-2).
Further, the acidic chemical solution is hydrofluoric acid with the mass ratio: ammonium fluoride: acetic acid=2:5:5.
Further, the composite modified starch is obtained by coupling nano zinc and acid modified starch through a silane coupling agent, and the mass ratio of the nano zinc to the acid modified starch is 1: (2-3).
Further, the retarder is any one or a combination of more of organic acid, soluble salt thereof, alkaline phosphate and proteins; in a specific embodiment, the retarder is selected from ZJ-G18 in a protein retarder.
Further, the foaming agent is one or a combination of more of sodium dodecyl sulfate, sodium fatty alcohol polyoxyethylene ether sulfate, alpha-sodium alkenyl sulfonate and hydrogen peroxide; in a specific embodiment, the foaming agent is selected from sodium dodecyl sulfate.
Further, the water reducer is a polycarboxylate water reducer.
A preparation method of a mildew-proof high-strength high-toughness paper gypsum board specifically comprises the following steps:
step 1, uniformly mixing desulfurized gypsum, composite fibers, sepiolite fibers and water mechanically to obtain a mixed solution;
step 2, mechanically and uniformly mixing the mixed solution obtained in the step 1, composite modified starch, a foaming agent, a retarder, a water reducing agent and chitosan to obtain a mixed material;
and 3, pouring the mixture obtained in the step 2 into a flat plate forming machine pressed with the facing paper, attaching a layer of the facing paper on the surface for forming, keeping the forming temperature at 40+/-2 ℃ all the time, and then drying, cutting and trimming to obtain the paper gypsum board.
Further, the mechanical mixing rotating speed is 400-900r/min, and the stirring time is 10-20min.
Example 1.
The preparation method of the mildew-proof high-strength high-toughness paper gypsum board comprises the following specific steps:
step 1, soaking glass fibers into an acidic chemical solution (the mass ratio of hydrofluoric acid to ammonium fluoride to acetic acid=2:5:5) for 3 minutes, washing with clear water for 3 times, adding a silane coupling agent and high-temperature sterilized wood fibers, wherein the mass ratio of the glass fibers to the wood fibers is 1:1, and obtaining composite fibers;
step 2, uniformly mixing 65 parts of desulfurized gypsum, 10 parts of composite fibers, 5 parts of sepiolite fibers and 60 parts of water mechanically (900 r/min and 10 min) to obtain a mixed solution;
step 3, coupling nano zinc and acid modified starch by a silane coupling agent, wherein the mass ratio of the nano zinc to the acid modified starch is 1:3, obtaining composite modified starch;
step 4, uniformly mixing the mixed solution obtained in the step 2, 10 parts of composite modified starch, 0.02 part of retarder (ZJ-G18 retarder), 0.2 part of sodium dodecyl sulfate, 0.2 part of polycarboxylate superplasticizer and 2 parts of chitosan mechanically (900 r/min and 10 min) to obtain a mixed material;
and 5, pouring the mixture obtained in the step 4 into a flat plate forming machine pressed with the facing paper, attaching a layer of the facing paper on the surface for forming, keeping the forming temperature at 40+/-2 ℃ all the time, and then drying, cutting and trimming to obtain the paper gypsum board.
Example 2.
The preparation method of the mildew-proof high-strength high-toughness paper gypsum board comprises the following specific steps:
step 1, soaking glass fibers into an acidic chemical solution (the mass ratio of hydrofluoric acid to ammonium fluoride to acetic acid=2:5:5) for 3 minutes, washing with clear water for 3 times, adding a silane coupling agent and high-temperature sterilized wood fibers, wherein the mass ratio of the glass fibers to the wood fibers is 1:1, and obtaining composite fibers;
step 2, uniformly mixing 75 parts of desulfurized gypsum, 16 parts of composite fibers, 8 parts of sepiolite fibers and 75 parts of water mechanically (900 r/min and 10 min) to obtain a mixed solution;
step 3, coupling nano zinc and acid modified starch by a silane coupling agent, wherein the mass ratio of the nano zinc to the acid modified starch is 1:3, obtaining composite modified starch;
step 4, uniformly mixing the mixed solution obtained in the step 2, 13 parts of composite modified starch, 0.02 part of retarder (ZJ-G18 retarder), 0.2 part of sodium dodecyl sulfate, 0.2 part of polycarboxylate superplasticizer and 2 parts of chitosan mechanically (900 r/min and 10 min) to obtain a mixed material;
and 5, pouring the mixture obtained in the step 4 into a flat plate forming machine pressed with the facing paper, attaching a layer of the facing paper on the surface for forming, keeping the forming temperature at 40+/-2 ℃ all the time, and then drying, cutting and trimming to obtain the paper gypsum board.
Example 3.
The preparation method of the mildew-proof high-strength high-toughness paper gypsum board comprises the following specific steps:
step 1, soaking glass fibers into an acidic chemical solution (the mass ratio of hydrofluoric acid to ammonium fluoride to acetic acid=2:5:5) for 3 minutes, washing with clear water for 3 times, adding a silane coupling agent and high-temperature sterilized wood fibers, wherein the mass ratio of the glass fibers to the wood fibers is 1:1, and obtaining composite fibers;
step 2, uniformly mixing 80 parts of desulfurized gypsum, 20 parts of composite fibers, 10 parts of sepiolite fibers and 85 parts of water mechanically (900 r/min and 10 min) to obtain a mixed solution;
step 3, coupling nano zinc and acid modified starch by a silane coupling agent, wherein the mass ratio of the nano zinc to the acid modified starch is 1:3, obtaining composite modified starch;
step 4, uniformly mixing the mixed solution obtained in the step 2, 15 parts of composite modified starch, 0.02 part of retarder (ZJ-G18 retarder), 0.2 part of sodium dodecyl sulfate, 0.2 part of polycarboxylate superplasticizer and 2 parts of chitosan mechanically (900 r/min and 10 min) to obtain a mixed material;
and 5, pouring the mixture obtained in the step 4 into a flat plate forming machine pressed with the facing paper, attaching a layer of the facing paper on the surface for forming, keeping the forming temperature at 40+/-2 ℃ all the time, and then drying, cutting and trimming to obtain the paper gypsum board.
Comparative example 1.
The paper gypsum board comprises the following specific steps:
step 1, mixing glass fibers and wood fibers (mass ratio) in a ratio of 1:1 to obtain composite fibers;
step 2, uniformly mixing 80 parts of desulfurized gypsum, 20 parts of composite fibers, 10 parts of sepiolite fibers and 85 parts of water mechanically (900 r/min and 10 min) to obtain a mixed solution;
step 3, coupling nano zinc and acid modified starch by a silane coupling agent, wherein the mass ratio of the nano zinc to the acid modified starch is 1:3, obtaining composite modified starch;
step 4, uniformly mixing the mixed solution obtained in the step 2, 15 parts of composite modified starch, 0.02 part of retarder (ZJ-G18 retarder), 0.2 part of sodium dodecyl sulfate, 0.2 part of polycarboxylate superplasticizer and 2 parts of chitosan mechanically (900 r/min and 10 min) to obtain a mixed material;
and 5, pouring the mixture obtained in the step 4 into a flat plate forming machine pressed with the facing paper, attaching a layer of the facing paper on the surface for forming, keeping the forming temperature at 40+/-2 ℃ all the time, and then drying, cutting and trimming to obtain the paper gypsum board.
Comparative example 2.
The paper gypsum board comprises the following specific steps:
step 1, soaking glass fibers into an acidic chemical solution (the mass ratio of hydrofluoric acid to ammonium fluoride to acetic acid=2:5:5) for 3 minutes, washing with clear water for 3 times, adding a silane coupling agent and high-temperature sterilized wood fibers, wherein the mass ratio of the glass fibers to the wood fibers is 1:1, and obtaining composite fibers;
step 2, uniformly mixing 80 parts of desulfurized gypsum, 20 parts of composite fibers, 10 parts of sepiolite fibers and 85 parts of water mechanically (900 r/min and 10 min) to obtain a mixed solution;
step 3, mixing nano zinc with acid modified starch (mass ratio) 1:3, mixing to obtain composite modified starch;
step 4, uniformly mixing the mixed solution obtained in the step 2, 15 parts of composite modified starch, 0.02 part of retarder (ZJ-G18 retarder), 0.2 part of sodium dodecyl sulfate, 0.2 part of polycarboxylate superplasticizer and 2 parts of chitosan mechanically (900 r/min and 10 min) to obtain a mixed material;
and 5, pouring the mixture obtained in the step 4 into a flat plate forming machine pressed with the facing paper, attaching a layer of the facing paper on the surface for forming, keeping the forming temperature at 40+/-2 ℃ all the time, and then drying, cutting and trimming to obtain the paper gypsum board.
Comparative example 3.
The paper gypsum board comprises the following specific steps:
step 1, soaking glass fibers into an acidic chemical solution (the mass ratio of hydrofluoric acid to ammonium fluoride to acetic acid=2:5:5) for 3 minutes, washing with clear water for 3 times, adding a silane coupling agent and high-temperature sterilized wood fibers, wherein the mass ratio of the glass fibers to the wood fibers is 1:1, and obtaining composite fibers;
step 2, uniformly mixing 80 parts of desulfurized gypsum, 20 parts of composite fibers, 10 parts of sepiolite fibers and 85 parts of water mechanically (900 r/min and 10 min) to obtain a mixed solution;
step 3, coupling nano zinc and acid modified starch by a silane coupling agent, wherein the mass ratio of the nano zinc to the acid modified starch is 1:3, obtaining composite modified starch;
step 4, uniformly mixing the mixed solution obtained in the step 2, 15 parts of composite modified starch, 0.02 part of retarder (ZJ-G18 retarder), 0.2 part of sodium dodecyl sulfate, 0.2 part of polycarboxylate superplasticizer and 2 parts of chitosan mechanically (900 r/min and 10 min) to obtain a mixed material;
and 5, pouring the mixture obtained in the step 4 into a flat plate forming machine pressed with the facing paper, attaching a layer of the facing paper on the surface for forming, keeping the forming temperature at 50+/-2 ℃ all the time, and then drying, cutting and trimming to obtain the paper gypsum board.
Table 1 table of performance results for examples and comparative examples.
Antifungal grade:
0 level-naked eyes without mildew under magnifier;
grade 1-visible mildew spots.
Paper surface adhesion performance:
the paper core is firmly stuck;
good-the paper core is mostly firmly stuck.
As can be seen from comparative example 1, the glass fibers and the wood fibers are not directly mixed by the treatment of the present invention, since the glass fibers are not sufficiently dispersed in the components and are not coupled with the wood fibers, the breaking load and impact resistance of the gypsum board are directly affected. As can be seen from comparative example 2, the nano zinc did not migrate to the surface to the greatest extent with the modified starch, directly affecting the surface antimicrobial properties of the gypsum board, but had little effect on the breaking load and impact resistance of the gypsum board, and the variation of the mechanical data of comparative example 2 was within the error range. Comparative example 3 shows that the modified starch cannot migrate to the surface of the gypsum board to the maximum extent due to the change of the setting temperature, and not only the breaking load and the impact resistance of the gypsum board are affected to a small extent, but also the adhesiveness and the antibacterial property are directly affected.
The method simulates the extremely humid environment condition in the north, and the gypsum board is naturally dried after being put into the gypsum board with the humidity of 80 percent, and the performance of the gypsum board is measured after 20 times of repetition.
Table 2 table of performance results for simulated humid environment examples 1-3.
From the results of the measurements of examples 1-3, it can be seen that the mechanical properties of the gypsum plasterboard are slightly reduced, but still meet the requirements of national standard GB/T9775-2008 in China, and the gypsum plasterboard has no deformation; the mechanical properties of the commercially available waterproof gypsum board are greatly reduced through testing, and the waterproof gypsum board starts to deform after repeating for about 10 times; the gypsum board prepared by the invention can be used in northern repeated wet areas.
Claims (10)
1. The mildew-proof high-strength high-toughness paper gypsum board is characterized by comprising the following components in parts by weight:
65-80 parts of desulfurized gypsum, 10-20 parts of composite fiber, 5-10 parts of sepiolite fiber, 10-15 parts of composite modified starch, 0.02-0.04 part of retarder, 0.1-0.5 part of foaming agent, 0.1-0.5 part of water reducer, 1-3 parts of chitosan, 60-85 parts of water and facing paper.
2. The mildew-resistant high-strength high-toughness paper-faced gypsum board of claim 1, wherein said desulfurized gypsum is 80-100 mesh.
3. The mildew-proof high-strength high-toughness paper gypsum board according to claim 1, wherein the composite fiber is prepared by the following steps: and (3) immersing the glass fiber in an acidic chemical solution for etching for 3-5 minutes, washing with clear water for 2-3 times, adding a silane coupling agent and the high-temperature sterilized wood fiber, and coupling to obtain the composite fiber.
4. The mildew-resistant high strength and high toughness paper faced gypsum board of claim 1, wherein the mass ratio of glass fibers to wood fibers is 1 (1-2).
5. The mildew-proof high-strength high-toughness paper gypsum board according to claim 1, wherein the acidic chemical solution is hydrofluoric acid with the mass ratio: ammonium fluoride: acetic acid=2:5:5.
6. The mildew-proof high-strength high-toughness paper gypsum board according to claim 1, wherein the composite modified starch is obtained by coupling nano zinc and acid modified starch through a silane coupling agent, and the mass ratio of the nano zinc to the acid modified starch is 1: (2-3).
7. The mildew resistant high strength and high toughness paper faced gypsum board of claim 1, wherein the retarder is any one or more combination of organic acids and soluble salts thereof, alkaline phosphates and proteins.
8. The mildew-proof high-strength high-toughness paper gypsum board according to claim 1, wherein the foaming agent is one or more of sodium dodecyl sulfate, sodium fatty alcohol polyoxyethylene ether sulfate, sodium alpha-alkenyl sulfonate and hydrogen peroxide; the water reducer is a polycarboxylate water reducer.
9. The preparation method of the mildew-proof high-strength high-toughness paper gypsum board is characterized by comprising the following steps of:
step 1, uniformly mixing desulfurized gypsum, composite fibers, sepiolite fibers and water mechanically to obtain a mixed solution;
step 2, mechanically and uniformly mixing the mixed solution obtained in the step 1, composite modified starch, a foaming agent, a retarder, a water reducing agent and chitosan to obtain a mixed material;
and 3, pouring the mixture obtained in the step 2 into a flat plate forming machine pressed with the facing paper, attaching a layer of the facing paper on the surface for forming, keeping the forming temperature at 40+/-2 ℃ all the time, and then drying, cutting and trimming to obtain the paper gypsum board.
10. The method for preparing the mildew-proof high-strength high-toughness paper gypsum board according to claim 9, wherein the mechanical mixing rotating speed is 400-900r/min, and the stirring time is 10-20min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310630736.6A CN116589259A (en) | 2023-05-31 | 2023-05-31 | Mildew-proof high-strength high-toughness paper gypsum board and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310630736.6A CN116589259A (en) | 2023-05-31 | 2023-05-31 | Mildew-proof high-strength high-toughness paper gypsum board and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116589259A true CN116589259A (en) | 2023-08-15 |
Family
ID=87606132
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310630736.6A Pending CN116589259A (en) | 2023-05-31 | 2023-05-31 | Mildew-proof high-strength high-toughness paper gypsum board and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116589259A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105040513A (en) * | 2015-06-26 | 2015-11-11 | 陕西科技大学 | Preparation method of glass fiber reinforcement paper |
| CN106946538A (en) * | 2017-03-21 | 2017-07-14 | 宣城万佳建材股份有限公司 | A kind of high intensity, fire-proof and water-proof Thistle board |
| CN111548188A (en) * | 2020-05-18 | 2020-08-18 | 北新集团建材股份有限公司 | Paper-surface gypsum board and preparation method thereof |
| CN114920535A (en) * | 2022-06-27 | 2022-08-19 | 阜新泰山石膏建材有限公司 | Paper-surface gypsum board and preparation method thereof |
-
2023
- 2023-05-31 CN CN202310630736.6A patent/CN116589259A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105040513A (en) * | 2015-06-26 | 2015-11-11 | 陕西科技大学 | Preparation method of glass fiber reinforcement paper |
| CN106946538A (en) * | 2017-03-21 | 2017-07-14 | 宣城万佳建材股份有限公司 | A kind of high intensity, fire-proof and water-proof Thistle board |
| CN111548188A (en) * | 2020-05-18 | 2020-08-18 | 北新集团建材股份有限公司 | Paper-surface gypsum board and preparation method thereof |
| CN114920535A (en) * | 2022-06-27 | 2022-08-19 | 阜新泰山石膏建材有限公司 | Paper-surface gypsum board and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110105013B (en) | High-strength anti-cracking foam concrete and preparation method thereof | |
| CN101367658B (en) | Method of manufacturing dampproof flame-proof plaster slab | |
| CN103526902A (en) | Waterproof moisture absorption gypsum plaster board and manufacturing technology thereof | |
| JP4320704B2 (en) | Lightweight inorganic molded body with excellent frost resistance and method for producing the same | |
| CN111196709A (en) | Waterproof, fireproof, mildewproof and high-strength glass fiber felt gypsum board and preparation method thereof | |
| CN105000853A (en) | Gypsum board with electromagnetic wave absorption function and manufacturing method thereof | |
| CN112209648A (en) | Modified waste rubber, preparation method thereof and sound insulation mortar | |
| CN111606730A (en) | Paper-surface gypsum board and preparation method thereof | |
| US3853689A (en) | Sag resistant gypsum board and method | |
| CN114656882A (en) | Composite adhesive, flame-retardant wood substrate using composite adhesive and preparation process of flame-retardant wood substrate | |
| CN1786383A (en) | Paper honeycomb sandwich inner insulation wall board and its mfg. method | |
| CN106966649B (en) | Sound-proof and fireproof architectural decoration wall and preparation method thereof | |
| CN116589259A (en) | Mildew-proof high-strength high-toughness paper gypsum board and preparation method thereof | |
| KR20000007111A (en) | Antibacterial molding composition for interior finish of building | |
| CN111606679B (en) | Paper-surface gypsum board and preparation method thereof | |
| CN112358238A (en) | Composition for preparing geopolymer-wood fiber composite board, composite board and preparation method thereof | |
| CN114920535B (en) | Paper-surface gypsum board and preparation method thereof | |
| CN115448678A (en) | Light anti-deflection paper-surface gypsum board and preparation method thereof | |
| CN114833912B (en) | Straw composite board and manufacturing method thereof | |
| CN115432985A (en) | Light anti-deflection paper-surface gypsum board and preparation method thereof | |
| CN115215606B (en) | Mortar suitable for negative temperature environment and preparation method thereof | |
| CN2486642Y (en) | Dampproof mould-proof paper face gypsum board | |
| CN115108805A (en) | Glass magnesium board with low wet expansion rate and preparation method thereof | |
| CN114105569A (en) | Method for preparing AEPS insulation board by utilizing EVA emulsion modified polyphenyl particles | |
| CN112159188A (en) | Light gypsum block and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |