CN116396044B - Foaming gypsum and preparation method and application thereof - Google Patents
Foaming gypsum and preparation method and application thereof Download PDFInfo
- Publication number
- CN116396044B CN116396044B CN202310390942.4A CN202310390942A CN116396044B CN 116396044 B CN116396044 B CN 116396044B CN 202310390942 A CN202310390942 A CN 202310390942A CN 116396044 B CN116396044 B CN 116396044B
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- CN
- China
- Prior art keywords
- gypsum
- foaming
- water
- fibers
- foam stabilizer
- 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.)
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- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 164
- 239000010440 gypsum Substances 0.000 title claims abstract description 164
- 238000005187 foaming Methods 0.000 title claims abstract description 74
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 64
- 239000000835 fiber Substances 0.000 claims abstract description 54
- 239000004814 polyurethane Substances 0.000 claims abstract description 50
- 229920002635 polyurethane Polymers 0.000 claims abstract description 50
- 239000006260 foam Substances 0.000 claims abstract description 38
- 239000004088 foaming agent Substances 0.000 claims abstract description 38
- 239000003381 stabilizer Substances 0.000 claims abstract description 36
- 239000002562 thickening agent Substances 0.000 claims abstract description 34
- 239000002994 raw material Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 30
- 239000002002 slurry Substances 0.000 claims description 23
- 239000000839 emulsion Substances 0.000 claims description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 13
- -1 sodium fatty alcohol Chemical class 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 10
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 claims description 8
- 239000011734 sodium Substances 0.000 claims description 8
- 229910052708 sodium Inorganic materials 0.000 claims description 8
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 7
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 7
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 6
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 6
- 235000021355 Stearic acid Nutrition 0.000 claims description 6
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 6
- 239000008116 calcium stearate Substances 0.000 claims description 6
- 235000013539 calcium stearate Nutrition 0.000 claims description 6
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 claims description 6
- 239000003365 glass fiber Substances 0.000 claims description 6
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 6
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 6
- DVEKCXOJTLDBFE-UHFFFAOYSA-N n-dodecyl-n,n-dimethylglycinate Chemical compound CCCCCCCCCCCC[N+](C)(C)CC([O-])=O DVEKCXOJTLDBFE-UHFFFAOYSA-N 0.000 claims description 6
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 6
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- 239000008117 stearic acid Substances 0.000 claims description 6
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 5
- 229920002748 Basalt fiber Polymers 0.000 claims description 5
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 235000021120 animal protein Nutrition 0.000 claims description 5
- 229920002678 cellulose Polymers 0.000 claims description 5
- 239000001913 cellulose Substances 0.000 claims description 5
- 235000010980 cellulose Nutrition 0.000 claims description 5
- MRUAUOIMASANKQ-UHFFFAOYSA-N cocamidopropyl betaine Chemical compound CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC([O-])=O MRUAUOIMASANKQ-UHFFFAOYSA-N 0.000 claims description 5
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 5
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims description 5
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims description 5
- 229920002401 polyacrylamide Polymers 0.000 claims description 5
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 5
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 239000000661 sodium alginate Substances 0.000 claims description 5
- 235000010413 sodium alginate Nutrition 0.000 claims description 5
- 229940005550 sodium alginate Drugs 0.000 claims description 5
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 claims description 5
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 5
- 229940073507 cocamidopropyl betaine Drugs 0.000 claims description 4
- 229920002978 Vinylon Polymers 0.000 claims description 3
- 125000003342 alkenyl group Chemical group 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- MRUAUOIMASANKQ-UHFFFAOYSA-O carboxymethyl-[3-(dodecanoylamino)propyl]-dimethylazanium Chemical compound CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC(O)=O MRUAUOIMASANKQ-UHFFFAOYSA-O 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims description 3
- 229940075468 lauramidopropyl betaine Drugs 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- GZCGUPFRVQAUEE-BGPJRJDNSA-N aldehydo-D-allose Chemical compound OC[C@@H](O)[C@@H](O)[C@@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-BGPJRJDNSA-N 0.000 claims description 2
- 239000002159 nanocrystal Substances 0.000 claims description 2
- 235000013162 Cocos nucifera Nutrition 0.000 claims 1
- 244000060011 Cocos nucifera Species 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 14
- 239000011148 porous material Substances 0.000 abstract description 9
- 239000000203 mixture Substances 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 239000012779 reinforcing material Substances 0.000 abstract description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 20
- 239000013078 crystal Substances 0.000 description 11
- 239000007787 solid Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 6
- 238000004321 preservation Methods 0.000 description 6
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000001878 scanning electron micrograph Methods 0.000 description 5
- 229910052796 boron Inorganic materials 0.000 description 4
- 239000004566 building material Substances 0.000 description 4
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000013019 agitation Methods 0.000 description 3
- 150000002191 fatty alcohols Chemical class 0.000 description 3
- 229910052938 sodium sulfate Inorganic materials 0.000 description 3
- 235000011152 sodium sulphate Nutrition 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 235000019864 coconut oil Nutrition 0.000 description 2
- 239000003240 coconut oil Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012782 phase change material Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 2
- PAWALTXRSMCTAC-ODTHDHSBSA-N (2S)-2-[[(2R)-2-[[(2S)-2-[[(2R)-2-[[(2S)-2-[[(2S)-2-[[(2R)-2-[[(2R)-2-[[(2S)-2-[[(2S)-2-[[2-[(2-aminoacetyl)amino]acetyl]amino]propanoyl]amino]-3-hydroxypropanoyl]amino]-3-sulfanylpropanoyl]amino]-3-sulfanylpropanoyl]amino]-4-methylpentanoyl]amino]-3-(4-hydroxyphenyl)propanoyl]amino]-3-sulfanylpropanoyl]amino]-5-(diaminomethylideneamino)pentanoyl]amino]-3-sulfanylpropanoyl]amino]-3-(1H-imidazol-5-yl)propanoic acid Chemical compound CC(C)C[C@H](NC(=O)[C@H](CS)NC(=O)[C@H](CS)NC(=O)[C@H](CO)NC(=O)[C@H](C)NC(=O)CNC(=O)CN)C(=O)N[C@@H](Cc1ccc(O)cc1)C(=O)N[C@@H](CS)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CS)C(=O)N[C@@H](Cc1c[nH]cn1)C(O)=O PAWALTXRSMCTAC-ODTHDHSBSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003094 microcapsule Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 235000018102 proteins Nutrition 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- 238000011282 treatment Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
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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
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- 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
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/147—Calcium sulfate hemi-hydrate with a specific crystal form beta-hemihydrate
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- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/42—Glass
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- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/38—Fibrous materials; Whiskers
- C04B14/46—Rock wool ; Ceramic or silicate fibres
- C04B14/4643—Silicates other than zircon
- C04B14/4656—Al-silicates, e.g. clay
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- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
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- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
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- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
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- C04B16/00—Use of organic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of organic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
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- C04B16/0675—Macromolecular compounds fibrous from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- 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
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- 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
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- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
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- C—CHEMISTRY; METALLURGY
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- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
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- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention provides foaming gypsum and a preparation method and application thereof, and belongs to the technical field of gypsum materials. The preparation method comprises the following steps: gypsum, foam stabilizer, foaming agent, aqueous polyurethane, thickener, fiber and water. According to the invention, the water-based polyurethane and the fiber are used as the reinforcing materials, the gypsum can abstract the water in the water-based polyurethane in the curing process, so that the molecular chain of the gypsum is contracted, part of the water-based polyurethane is contracted into a hard film with certain toughness, and the hard film is filled in the gypsum pores and matched with the fiber reinforced framework to play a role in reinforcing together; adding a foaming agent and a foam stabilizer to form foamed gypsum with uniform pore structure; the composition and the dosage of the raw materials are controlled, so that the foaming gypsum has low thermal conductivity and high strength. The results of the examples show that the thermal conductivity of the foamed gypsum provided by the invention is below 0.085W/mK, even can be as low as 0.065W/mK, and the compressive strength is above 1.2 MPa.
Description
Technical Field
The invention relates to the technical field of gypsum materials, in particular to foaming gypsum and a preparation method and application thereof.
Background
Gypsum is an ancient building material with various special advantages, has the advantages of low energy consumption, high cost performance, good fire resistance, heat insulation, sound insulation and the like, and has been widely applied to constructional engineering. In addition, gypsum can be efficiently recovered in a suitable production process according to the basic principle. Thus, in recent years, gypsum has become a focus of attention for many students.
Compared with other building materials, the gypsum and the products thereof have the advantages of simple molding process, low material production energy consumption, wide raw material sources, good decorative effect, no environmental pollution and the like, and are applied to various industries. As the gypsum contains a large amount of crystal water, when the product encounters fire, the gypsum removes the crystal water, and the product has flame retardant effect. The existence of a large number of micropores in the gypsum hardened body ensures that the gypsum hardened body has good heat insulation property, sound absorption property and hygroscopicity, and is recognized as a green wall material. The biggest limiting factor in the use of gypsum products as building materials is their poor water resistance, their strength loss increases dramatically with increasing humidity, and at the same time they are prone to warp. Therefore, in order to expand the application range and make it applicable to different environments, it is necessary to modify the gypsum material to exert its effect as much as possible.
The energy-saving policy is implemented in China, and meanwhile, the material of the wall body is developed from the original solid cement bricks to a novel light heat-insulating high-strength wall body. There are two types of treatments for lightening gypsum: firstly, adding lightweight aggregate, such as patent CN 114804915A, provides a lightweight building material which is doped with phase change materials with different sizes, mixing phosphogypsum, mineral powder, carbide slag, composite phase change materials, phase change microcapsules, regenerated fibers and various auxiliary agents. The phase-change capsule filler is more uniformly dispersed, and meanwhile, the phase-change heat preservation capability of the material can be cooperatively improved. The performance of the obtained sample meets the standard required by JGT169-2016 general technical requirement of lightweight slat for building partition wall, but because the sample is not introduced into a cellular structure, the pores in gypsum are formed by phase change capsule dehydration and overlap joint among fibers, so the heat conductivity coefficient is generally higher than 0.08W/(m.K), the heat conductivity coefficient standard of building foaming cement specified by national standard is not met, and the heat preservation effect is still not ideal; the patent CN 113336570A takes industrial byproduct gypsum as raw materials, and adopts foaming aids such as a mixed protein foaming agent, hydrogen peroxide, potassium permanganate, calcium stearate and the like, and adopts physical stirring foaming to prepare the lightweight porous sound absorption gypsum, meanwhile, the chemical foaming agent is introduced on the basis of physical foaming, and the original closed cell structure is destroyed by foaming again on the gaps generated by the original physical foaming, so that partial through holes are formed, and the sound absorption performance of the material is further improved. But its double foaming results in a significant weakening of the compressive flexural strength. Either the introduction of lightweight aggregate or foam introduces voids in the gypsum matrix structure that significantly reduce its strength. Therefore, there is a need for a gypsum material that combines excellent thermal insulation properties with mechanical strength.
Disclosure of Invention
The invention aims to provide foaming gypsum and a preparation method and application thereof. The foaming gypsum provided by the invention has excellent heat preservation performance and mechanical strength.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides foaming gypsum, which is prepared from the following raw materials: functional components and water; the functional components comprise the following components in percentage by mass: 30-96% of gypsum, 1-10% of foam stabilizer, 0.5-5% of foaming agent, 1-30% of aqueous polyurethane, 0.5-5% of thickening agent and 1-20% of fiber; the mass ratio of the water to the gypsum is (0.8-1.2): 1.
Preferably, the gypsum includes one or more of beta-type hemihydrate gypsum, alpha-type hemihydrate gypsum, phosphogypsum, fluorine gypsum and boro gypsum.
Preferably, the foaming agent comprises one or more of alpha-sodium alkenyl sulfonate AOS, sodium dodecyl sulfate, hydrogen peroxide, aluminum powder, sodium dodecyl benzene sulfonate, cocamidopropyl betaine CAB-35, dodecyl dimethyl betaine BS-12, lauramidopropyl betaine LAB, animal protein foaming agent and cocoalkanolamide 6501.
Preferably, the foam stabilizer comprises one or more of polyvinyl alcohol, polyacrylamide, calcium stearate, sodium stearate, stearic acid and sodium fatty alcohol-polyoxyethylene ether sulfate.
Preferably, the thickener comprises one or more of hydroxypropyl methylcellulose, hydroxyethyl cellulose, cellulose nanocrystals, polyoxyethylene, sodium alginate, and hydroxymethyl cellulose.
Preferably, the fibers comprise one or more of glass fibers, polypropylene fibers, polyester fibers, nylon fibers, vinylon fibers, and basalt fibers.
Preferably, the length of the fibers is 3 to 19mm and the diameter of the fibers is 10 to 50 μm.
The invention provides a preparation method of the foaming gypsum, which comprises the following steps:
(1) Mixing and stirring water, a foam stabilizer, waterborne polyurethane, a foaming agent and a thickening agent to obtain foaming slurry;
(2) Adding fibers into the foaming slurry obtained in the step (1), and stirring to obtain fiber composite foaming slurry;
(3) And (3) adding gypsum into the fiber composite foaming slurry in the step (2), stirring and curing to obtain the foaming gypsum.
Preferably, the stirring speed in the steps (1), (2) and (3) is independently 800-2000 rpm, and the stirring time is independently 3-12 min.
The invention also provides application of the foaming gypsum in the technical scheme or the foaming gypsum prepared by the preparation method according to the technical scheme in the field of construction.
The invention provides foaming gypsum, which is prepared from the following raw materials: functional components and water; the functional components comprise the following components in percentage by mass: 30-96% of gypsum, 1-10% of foam stabilizer, 0.5-5% of foaming agent, 1-30% of aqueous polyurethane, 0.5-5% of thickening agent and 1-20% of fiber; the mass ratio of the water to the gypsum is (0.8-1.2): 1. according to the invention, the water-based polyurethane and the fiber are used as the reinforcing materials, the gypsum can abstract moisture in the water-based polyurethane in the curing process, so that molecular chains of the water-based polyurethane shrink, part of the water-based polyurethane shrink into a hard film with certain toughness, the hard film is filled in gypsum pores, the water-based polyurethane is matched with the fiber reinforced skeleton to play a role in reinforcing together, the dispersed water-based polyurethane in gypsum slurry supports gypsum crystals in a lamellar structure mode, and simultaneously serves as heterogeneous cores for gypsum crystal growth, the single surface interface interaction between the traditional polymer/gypsum is removed, the gypsum crystals and the water-based polyurethane are mutually adhered and interpenetrated, and a more compact binding force is additionally obtained; adding a foaming agent and a foam stabilizer to form foamed gypsum with uniform pore structure; the composition and the dosage of the raw materials are controlled, so that the foaming gypsum has low thermal conductivity and high strength. The results of the examples show that the thermal conductivity of the foamed gypsum provided by the invention is lower than 0.085W/m.K and even can be as low as 0.065W/m.K, compared with pure gypsum, the thermal conductivity is reduced by 72-79%, and the compressive strength is higher than 1.2 MPa.
Drawings
FIG. 1 is an SEM image of foamed gypsum provided in example 2 of the present invention;
FIG. 2 is an SEM image of various parts of the foamed gypsum provided in example 2 of the present invention;
fig. 3 is an SEM image of pure gypsum provided in comparative example 7 of the present invention.
Detailed Description
The invention provides foaming gypsum, which is prepared from the following raw materials: functional components and water; the functional components comprise the following components in percentage by mass: 30-96% of gypsum, 1-10% of foam stabilizer, 0.5-5% of foaming agent, 1-30% of aqueous polyurethane, 0.5-5% of thickening agent and 1-20% of fiber; the mass ratio of the water to the gypsum is (0.8-1.2): 1.
The source of each raw material is not particularly limited unless specifically stated, and commercially available products known to those skilled in the art may be used.
The raw materials for preparing the foaming gypsum provided by the invention comprise functional components, wherein the functional components comprise 30-96% of gypsum, preferably 30-80% of gypsum, and more preferably 30-60% of gypsum by mass.
In the present invention, the gypsum preferably includes one or more of beta-type hemihydrate gypsum, alpha-type hemihydrate gypsum, phosphogypsum, fluorine gypsum and borogypsum.
The functional component comprises 1 to 10% of foam stabilizer, preferably 3 to 10%, more preferably 5 to 10% by mass. In the invention, the foam stabilizer comprises one or more of polyvinyl alcohol, polyacrylamide, calcium stearate, sodium stearate, stearic acid and fatty alcohol polyoxyethylene ether sodium sulfate AES. In the invention, the foam stabilizer is used for stabilizing formed bubbles, so as to form the foam material with uniform pore structure. The invention limits the type and the dosage of the foam stabilizer in the above range, so that the foam stabilizer has better foam stabilizing effect.
The functional component comprises 0.5 to 5% by mass of a foaming agent, preferably 1 to 5% by mass, more preferably 3 to 5% by mass. In the present invention, the foaming agent preferably includes one or more of alpha-sodium alkenyl sulfonate AOS, sodium dodecyl sulfate K12, hydrogen peroxide, aluminum powder, sodium dodecyl benzene sulfonate LAS, cocoamidopropyl betaine CAB-35, dodecyl dimethyl betaine BS-12, lauramidopropyl betaine LAB, animal protein foaming agent, and cocoalkanolamide 6501. The invention limits the type and the dosage of the foaming agent in the above range, so that the foaming gypsum has proper pore structure, and the heat insulation performance and strength of the foaming gypsum are further improved.
The functional component comprises 1 to 30% of aqueous polyurethane, preferably 5 to 30%, more preferably 15 to 30% by mass. In the present invention, the solid content of the aqueous polyurethane is preferably 10 to 60%, more preferably 20 to 40%. In the present invention, the aqueous polyurethane is preferably an aqueous polyurethane emulsion. In an embodiment of the present invention, the aqueous polyurethane emulsion is preferably an aqueous polyurethane emulsion model 1502F manufactured by new materials, inc An Dahua. In the invention, the aqueous polyurethane emulsion contains an emulsifier, so that the surface tension of gypsum slurry can be reduced, generated bubbles stably exist, meanwhile, the aqueous polyurethane emulsion is used as a reinforcing material of foaming gypsum, the gypsum can abstract moisture in the aqueous polyurethane in the curing process, so that molecular chains of the gypsum shrink, part of the aqueous polyurethane shrink into a hard film with certain toughness, the hard film is filled in gypsum pores, the aqueous polyurethane is matched with a fiber reinforced skeleton to play a role in reinforcing together, the dispersed aqueous polyurethane in the gypsum slurry supports gypsum crystals in a lamellar structure mode, and simultaneously, the dispersed aqueous polyurethane serves as heterogeneous cores for the growth of the gypsum crystals, single surface interface interaction between a traditional polymer/gypsum is removed, and the gypsum crystals and the aqueous polyurethane are mutually attached and interpenetrated, so that a more compact binding force is additionally obtained. The invention limits the dosage of the aqueous polyurethane within the range, and can further improve the strength of the foaming gypsum.
The functional component comprises 0.5 to 5% by mass of a thickener, preferably 1 to 5% by mass, more preferably 3 to 5% by mass. In the present invention, the thickener preferably includes one or more of hydroxypropyl methylcellulose HPMC, hydroxyethyl cellulose HEC, cellulose nanocrystalline NCC, polyoxyethylene PEO, sodium alginate SA, and hydroxymethyl cellulose HMC. In the invention, the thickener is used for increasing the viscosity of the system, and the mutual hydrogen bond action of the thickener and the aqueous polyurethane ensures that the surface crust condition of the gypsum is well improved, and the aesthetic property of the gypsum is obviously improved. The invention limits the usage amount of the thickener in the above range, which can make the system have proper viscosity and further improve the performance of the foaming gypsum.
The functional component comprises 1 to 20% of fiber, preferably 5 to 20%, more preferably 10 to 20% by mass. In the present invention, the fibers preferably include one or more of glass fibers, polypropylene fibers, polyester fibers, nylon fibers, vinylon fibers, and basalt fibers. In the present invention, the length of the fibers is preferably 3 to 19mm; the diameter of the fibers is preferably 10 to 50. Mu.m. In the invention, the fiber is used as a reinforcing material of the foaming gypsum to improve the mechanical strength of the foaming gypsum. The invention limits the dosage, length and diameter of the fiber in the above range, and can better play a role in reinforcement.
In the invention, the mass ratio of the water to the gypsum is (0.8-1.2): 1, preferably (0.9 to 1.1): 1, more preferably 1:1. The invention limits the water consumption in the above range, the water consumption can influence the solidification and foaming condition of gypsum, when the water is too much, the gypsum slurry is too thin, the mechanical property of the formed gypsum is negatively influenced, when the water is too little, the crystal water required by the solidification of the gypsum can not be satisfied, and the forming of the gypsum is influenced.
The invention provides a preparation method of the foaming gypsum, which comprises the following steps:
(1) Mixing and stirring water, a foam stabilizer, waterborne polyurethane, a foaming agent and a thickening agent to obtain foaming slurry;
(2) Adding fibers into the foaming slurry obtained in the step (1), and stirring to obtain fiber composite foaming slurry;
(3) And (3) adding gypsum into the fiber composite foaming slurry in the step (2), stirring and curing to obtain the foaming gypsum.
The invention mixes and stirs water, foam stabilizer, aqueous polyurethane, foaming agent and thickener to obtain foaming slurry.
In the present invention, the mixture of water, foam stabilizer, aqueous polyurethane, foaming agent and thickener is preferably: firstly, adding water, then adding foam stabilizer, aqueous polyurethane and foaming agent, and finally adding thickening agent. According to the invention, firstly, water is added to prevent the foam stabilizer, the aqueous polyurethane, the foaming agent and the thickening agent from adhering to and depositing on a container to form gel or a film, and finally, the thickening agent is added because the thickening agent can thicken or even gel the solution after being added, and at the moment, if the foam stabilizer and the aqueous polyurethane are added again, the gel is deposited at the bottom, so that the subsequent stirring is unfavorable, and finally, the thickening agent is added.
In the present invention, the stirring rate is preferably 800 to 2000rpm, more preferably 1200 to 1600rpm; the stirring time is preferably 3 to 12min, more preferably 5 to 9min; the stirring is preferably carried out at room temperature.
After the foaming slurry is obtained, the fiber is added into the foaming slurry and stirred to obtain the fiber composite foaming slurry.
In the present invention, the stirring rate is preferably 800 to 2000rpm, more preferably 1200 to 1600rpm; the stirring time is preferably 3 to 12min, more preferably 5 to 9min; the stirring is preferably carried out at room temperature.
After the fiber composite foaming slurry is obtained, gypsum is added into the fiber composite foaming slurry, and the mixture is stirred and solidified to obtain the foaming gypsum.
The gypsum is added finally, because if the gypsum is added in advance, the gypsum is solidified in part under the condition that the subsequent air bubbles are not generated and are stable, and the final forming and foaming effects of the gypsum are affected.
In the present invention, the stirring rate is preferably 800 to 2000rpm, more preferably 1200 to 1600rpm; the stirring time is preferably 3 to 12min, more preferably 5 to 9min; the stirring is preferably carried out at room temperature.
The present invention limits the rate, time and temperature of agitation to the above ranges because the gypsum slurry obtained by agitation may undergo severe collapse when the agitation time is exceeded.
In the present invention, the curing is preferably: firstly, curing for 2-4 h at normal temperature, and then curing for 12h at 50-90 ℃.
By adopting the curing mode, the foamed gypsum can be completely cured, and the performance of the foamed gypsum is further improved.
The invention provides application of the foaming gypsum in the technical scheme or the foaming gypsum prepared by the preparation method in the technical scheme in the field of construction.
The operation of the application of the foaming gypsum in the building field is not particularly limited, and the technical scheme of the application of the foaming gypsum in the building field, which is well known to the person skilled in the art, can be adopted.
The technical solutions of the present invention will be clearly and completely described in the following in connection with the embodiments of the present invention. It will be apparent that the described embodiments are only 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 foaming gypsum of the embodiment is prepared from the following raw materials: functional components and water; the functional components consist of the following components in percentage by mass: 30% of beta-hemihydrate gypsum, 10% of foam stabilizer polyvinyl alcohol, 5% of foaming agent alpha-alkenyl sodium sulfonate, 30% of aqueous polyurethane emulsion (the solid content is 35+/-1%, model 1502F of Anhui An Dahua Tay New Material Co., ltd.), 5% of thickener hydroxypropyl methylcellulose and 20% of glass fiber (the length is 3-19 mm, the diameter is 10-50 μm); the mass ratio of the water to the beta-type semi-hydrated gypsum is 1:1, a step of;
The preparation method comprises the following steps: sequentially adding water, polyvinyl alcohol, aqueous polyurethane emulsion, alpha-sodium alkenyl sulfonate and hydroxypropyl methyl cellulose, stirring at 1500rpm for 5min at high speed, adding glass fiber, stirring for 5min, adding gypsum, stirring for 5min, pouring into a mold, curing at normal temperature for 2h, and curing in an oven at 80deg.C for 12h.
Example 2
The foaming gypsum of the embodiment is prepared from the following raw materials: functional components and water; the functional components consist of the following components in percentage by mass: 60% of alpha semi-hydrated gypsum, 5% of foam stabilizer polyacrylamide, 2% of foaming agent sodium dodecyl sulfate, 20% of aqueous polyurethane emulsion (solid content 35+/-1%, anhui An Dahua Tai New Material Co., ltd., model 1502F), 3% of thickener cellulose nanocrystalline and 10% of polypropylene fiber (length 3-19 mm, diameter 10-50 μm); the mass ratio of the water to the alpha-hemihydrate gypsum is 1:1, a step of;
The preparation method is the same as in example 1.
Example 3
The foaming gypsum of the embodiment is prepared from the following raw materials: functional components and water; the functional components consist of the following components in percentage by mass: 96% of phosphogypsum, 1% of foam stabilizer fatty alcohol polyoxyethylene ether sodium sulfate, 0.5% of foaming agent cocamidopropyl betaine, 1% of aqueous polyurethane emulsion (solid content 35+/-1%, anhui An Dahua Tai New Material Co., ltd., model 1502F), 0.5% of thickener polyoxyethylene and 1% of ultra-high molecular weight polyethylene fiber (length 3-19 mm, diameter 10-50 μm); the mass ratio of the water to the phosphogypsum is 1:1, a step of;
The preparation method is the same as in example 1.
Example 4
The foaming gypsum of the embodiment is prepared from the following raw materials: functional components and water; the functional components consist of the following components in percentage by mass: 30% of boron gypsum, 10% of foam stabilizer calcium stearate, 5% of animal protein foaming agent, 30% of aqueous polyurethane emulsion (solid content 35+/-1%, anhui An Dahua Tai New Material Co., ltd., model 1502F), 5% of thickener hydroxymethyl cellulose and 20% of polyimide fiber (length 3-19 mm, diameter 10-50 μm); the mass ratio of the water to the boron gypsum is 1:1, a step of;
The preparation method is the same as in example 1.
Example 5
The foaming gypsum of the embodiment is prepared from the following raw materials: functional components and water; the functional components consist of the following components in percentage by mass: 60% of alpha semi-hydrated gypsum, 5% of foam stabilizer sodium stearate, 3% of foaming agent coconut oil alkanolamide, 20% of aqueous polyurethane emulsion (solid content 35+/-1%, model 1502F of Anhui An Dahua Tai New Material Co., ltd.), 2% of thickener sodium alginate and 10% of basalt fiber (length 3-19 mm, diameter 10-50 μm); the mass ratio of the water to the alpha-hemihydrate gypsum is 1:1, a step of;
The preparation method is the same as in example 1.
Example 6
The foaming gypsum of the embodiment is prepared from the following raw materials: functional components and water; the functional components consist of the following components in percentage by mass: 96% of fluorogypsum, 1% of foam stabilizer stearic acid, 0.5% of foaming agent hydrogen peroxide, 1% of aqueous polyurethane emulsion (solid content 35+/-1%, anhui An Dahua Tai New Material Co., ltd., model 1502F), 0.5% of thickener hydroxyethyl cellulose and 1% of silicon carbide fiber (length 3-19 mm, diameter 10-50 μm); the mass ratio of the water to the fluorogypsum is 1:1, a step of;
The preparation method is the same as in example 1.
Comparative example 1
The foaming gypsum of the comparative example is prepared from the following raw materials in parts by weight: functional components and water; the functional components consist of the following components in percentage by mass: 60% of beta-hemihydrate gypsum, 10% of foam stabilizer polyvinyl alcohol, 5% of foaming agent alpha-alkenyl sodium sulfonate, 5% of thickener hydroxypropyl methylcellulose and 20% of glass fiber (with the length of 3-19 mm and the diameter of 10-50 mu m); the mass ratio of the water to the beta-type semi-hydrated gypsum is 1:1, a step of;
The preparation method is the same as in example 1.
Comparative example 2
The foaming gypsum of the comparative example is prepared from the following raw materials in parts by weight: functional components and water; the functional components consist of the following components in percentage by mass: 80% of alpha-hemihydrate gypsum, 5% of foam stabilizer polyacrylamide, 2% of foaming agent sodium dodecyl sulfate, 3% of thickener cellulose nanocrystalline and 10% of polypropylene fiber (with the length of 3-19 mm and the diameter of 10-50 mu m); the mass ratio of the water to the alpha-hemihydrate gypsum is 1:1, a step of;
The preparation method is the same as in example 1.
Comparative example 3
The foaming gypsum of the comparative example is prepared from the following raw materials in parts by weight: functional components and water; the functional components consist of the following components in percentage by mass: 97% of phosphogypsum, 1% of foam stabilizer fatty alcohol polyoxyethylene ether sodium sulfate, 0.5% of foaming agent cocamidopropyl betaine, 0.5% of thickener polyoxyethylene and 1% of ultra-high molecular weight polyethylene fiber (with the length of 3-19 mm and the diameter of 10-50 mu m); the mass ratio of the water to the phosphogypsum is 1:1, a step of;
The preparation method is the same as in example 1.
Comparative example 4
The foaming gypsum of the comparative example is prepared from the following raw materials in parts by weight: functional components and water; the functional components consist of the following components in percentage by mass: 60% of boron gypsum, 10% of foam stabilizer calcium stearate, 5% of animal protein foaming agent, 5% of thickener hydroxymethyl cellulose and 20% of polyimide fiber (with the length of 3-19 mm and the diameter of 10-50 mu m); the mass ratio of the water to the boron gypsum is 1:1, a step of;
The preparation method is the same as in example 1.
Comparative example 5
The foaming gypsum of the comparative example is prepared from the following raw materials in parts by weight: functional components and water; the functional components consist of the following components in percentage by mass: 80% of alpha-hemihydrate gypsum, 5% of foam stabilizer sodium stearate, 3% of foaming agent coconut oil alkanolamide, 2% of thickener sodium alginate and 10% of basalt fiber (with the length of 3-19 mm and the diameter of 10-50 mu m); the mass ratio of the water to the alpha-hemihydrate gypsum is 1:1, a step of;
The preparation method is the same as in example 1.
Comparative example 6
The foaming gypsum of the comparative example is prepared from the following raw materials in parts by weight: functional components and water; the functional components consist of the following components in percentage by mass: 97% of fluorogypsum, 1% of foam stabilizer stearic acid, 0.5% of foaming agent hydrogen peroxide, 0.5% of thickener hydroxyethyl cellulose and 1% of silicon carbide fiber (with the length of 3-19 mm and the diameter of 10-50 mu m); the mass ratio of the water to the fluorogypsum is 1:1, a step of;
The preparation method is the same as in example 1.
Comparative example 7
The foaming sample of the simple gypsum of the comparative example is prepared from the following raw materials: functional components and water; the functional components consist of the following components in percentage by mass: 98% of alpha-hemihydrate gypsum, 1% of foam stabilizer stearic acid and 1% of foaming agent sodium dodecyl sulfate; the mass ratio of the water to the alpha-hemihydrate gypsum is 1:1, a step of;
the preparation method comprises the steps of sequentially adding water, a foam stabilizer and a foaming agent, stirring at a high speed at 1500rpm for 5min, finally adding gypsum, stirring for 5min, pouring into a mold for curing at normal temperature for 2h, and then placing into an oven for curing at 80 ℃ for 12h.
The thermal conductivity of the foamed gypsum of examples 1 to 6 and the pure gypsum of comparative example 7 were tested, and the results are shown in Table 1.
Table 1 thermal conductivity coefficients of the expanded gypsum of examples 1 to 6 and the pure gypsum of comparative example 7
As can be seen from Table 1, the thermal conductivity of the foamed gypsum provided by the invention is below 0.085W/m.K, even can be as low as 0.065W/m.K, and compared with pure gypsum, the thermal conductivity is reduced by 72-79%, and the foamed gypsum has better heat insulation performance.
The gypsum materials of examples 1 to 6 and comparative examples 1 to 7 were tested for compressive strength, and the results are shown in Table 2.
Table 2 compressive strengths of gypsum materials of examples 1 to 6 and comparative examples 1 to 7
As can be seen from Table 2, compared with the material prepared without adding the aqueous polyurethane emulsion, the compressive strength of the foamed gypsum provided by the invention is higher, the compressive strength is improved by 6.6-33%, and the foamed gypsum has better bearing capacity.
Observing different parts of the foaming gypsum provided in the embodiment 2 by adopting a scanning electron microscope, wherein the obtained SEM images are respectively shown in fig. 1 and 2; the SEM image obtained by observing the pure gypsum provided in comparative example 7 by using a scanning electron microscope is shown in fig. 3. As can be seen from figures 1-3, the crystal structure of the gypsum material provided by the invention is not changed obviously, and still keeps a slender cone shape, meanwhile, on the basis of foaming and pore storage of gypsum, the aqueous polyurethane emulsion is used as a base point for the growth of gypsum crystals, a lamellar structure is formed in the gypsum, the porous structure of the foamed gypsum is reinforced, and the heat preservation performance requirement of the foamed gypsum is met.
In conclusion, the foamed gypsum provided by the invention has the advantages of lower heat conductivity coefficient, better heat preservation effect, higher compressive strength and capability of meeting the heat preservation operation environment with higher work load requirements.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (9)
1. The foaming gypsum is prepared from the following raw materials in parts by weight: functional components and water; the functional components consist of the following components in percentage by mass: 30-96% of gypsum, 1-10% of foam stabilizer, 0.5-5% of foaming agent, 1-30% of aqueous polyurethane, 0.5-5% of thickening agent and 1-20% of fiber; the mass ratio of the water to the gypsum is (0.8-1.2): 1, a step of; the aqueous polyurethane is aqueous polyurethane emulsion; the foaming agent comprises one of alpha-sodium alkenyl sulfonate AOS, sodium dodecyl sulfate, hydrogen peroxide, aluminum powder, sodium dodecyl benzene sulfonate, cocamidopropyl betaine CAB-35, dodecyl dimethyl betaine BS-12, lauramidopropyl betaine LAB, animal protein foaming agent and cocoanut alkanolamide 6501.
2. The foamed gypsum of claim 1, wherein the gypsum comprises one or more of beta hemihydrate gypsum, alpha hemihydrate gypsum, phosphogypsum, fluorgypsum, and borogypsum.
3. The foamed gypsum according to claim 1, wherein the foam stabilizer comprises one or more of polyvinyl alcohol, polyacrylamide, calcium stearate, sodium stearate, stearic acid, and sodium fatty alcohol polyoxyethylene ether sulfate.
4. The foamed gypsum according to claim 1, wherein the thickener comprises one or more of hydroxypropyl methylcellulose, hydroxyethyl cellulose, cellulose nanocrystals, polyoxyethylene, sodium alginate, and hydroxymethyl cellulose.
5. The foamed gypsum according to claim 1, wherein the fibers comprise one or more of glass fibers, polypropylene fibers, polyester fibers, nylon fibers, vinylon fibers, and basalt fibers.
6. The foamed gypsum according to claim 1 or 5, wherein the length of the fibers is 3 to 19mm and the diameter of the fibers is 10 to 50 μm.
7. The method for preparing foamed gypsum according to any one of claims 1 to 6, comprising the steps of:
(1) Mixing and stirring water, a foam stabilizer, waterborne polyurethane, a foaming agent and a thickening agent to obtain foaming slurry;
(2) Adding fibers into the foaming slurry obtained in the step (1), and stirring to obtain fiber composite foaming slurry;
(3) And (3) adding gypsum into the fiber composite foaming slurry in the step (2), stirring and curing to obtain the foaming gypsum.
8. The method according to claim 7, wherein the stirring rate in the steps (1), (2) and (3) is independently 800 to 2000rpm, and the stirring time is independently 3 to 12min.
9. Use of the foamed gypsum according to any one of claims 1 to 6 or prepared according to the preparation method of claim 7 or 8 in the field of construction.
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| CN109180123A (en) * | 2018-09-20 | 2019-01-11 | 博瑞新材（北京）科技有限公司 | A kind of gypsum base anti-fire door core board and preparation method thereof |
| CN113336570A (en) * | 2021-07-02 | 2021-09-03 | 重庆大学 | Novel composite foamed gypsum sound-absorbing material and preparation method thereof |
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| CN202248657U (en) * | 2011-09-15 | 2012-05-30 | 济南大学 | Glass fiber grid cloth/foaming phosphorous building gypsum plaster composite external wall heat-insulation board |
| CN104860620A (en) * | 2015-04-28 | 2015-08-26 | 昆明理工大学 | Copolymer enhanced lightweight gypsum decorative materials |
| CN106284893A (en) * | 2015-05-26 | 2017-01-04 | 山西颐顺鑫科技有限公司 | Novel light complex heat-preservation external decoration body of wall and preparation method thereof |
| CN105565754A (en) * | 2015-12-17 | 2016-05-11 | 合肥杰明新材料科技有限公司 | Crack-resistant wall thermal-insulation material |
| CN110606769B (en) * | 2019-10-16 | 2022-03-01 | 洛阳理工学院 | Light high-strength gypsum composite material with electromagnetic shielding and absorption effects |
| WO2022267848A1 (en) * | 2021-06-21 | 2022-12-29 | 北新集团建材股份有限公司 | Lightweight high-strength paperbacked gypsum board and preparation method therefor |
| CN115073084A (en) * | 2022-06-02 | 2022-09-20 | 湖南省富民乐建材科技发展有限公司 | Environment-friendly high-performance light foaming cement and use method thereof |
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| CN109180123A (en) * | 2018-09-20 | 2019-01-11 | 博瑞新材（北京）科技有限公司 | A kind of gypsum base anti-fire door core board and preparation method thereof |
| CN113336570A (en) * | 2021-07-02 | 2021-09-03 | 重庆大学 | Novel composite foamed gypsum sound-absorbing material and preparation method thereof |
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