CN111282187A - Instant-prepared sodium alginate hydrogel fire extinguishing agent and preparation method thereof - Google Patents
Instant-prepared sodium alginate hydrogel fire extinguishing agent and preparation method thereof Download PDFInfo
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- CN111282187A CN111282187A CN202010170444.5A CN202010170444A CN111282187A CN 111282187 A CN111282187 A CN 111282187A CN 202010170444 A CN202010170444 A CN 202010170444A CN 111282187 A CN111282187 A CN 111282187A
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- 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 title claims abstract description 64
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 62
- 239000000017 hydrogel Substances 0.000 title claims abstract description 46
- 239000000661 sodium alginate Substances 0.000 title claims abstract description 45
- 235000010413 sodium alginate Nutrition 0.000 title claims abstract description 45
- 229940005550 sodium alginate Drugs 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 25
- 239000000654 additive Substances 0.000 claims abstract description 101
- 230000000996 additive effect Effects 0.000 claims abstract description 101
- 239000000463 material Substances 0.000 claims abstract description 82
- 239000000945 filler Substances 0.000 claims abstract description 42
- LFVGISIMTYGQHF-UHFFFAOYSA-N ammonium dihydrogen phosphate Chemical compound [NH4+].OP(O)([O-])=O LFVGISIMTYGQHF-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910000387 ammonium dihydrogen phosphate Inorganic materials 0.000 claims abstract description 22
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052921 ammonium sulfate Inorganic materials 0.000 claims abstract description 22
- 235000011130 ammonium sulphate Nutrition 0.000 claims abstract description 22
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 22
- 235000019837 monoammonium phosphate Nutrition 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 22
- 229920005989 resin Polymers 0.000 claims abstract description 22
- 239000002250 absorbent Substances 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 15
- 238000003756 stirring Methods 0.000 claims description 96
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims description 48
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 46
- 238000010438 heat treatment Methods 0.000 claims description 40
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 25
- 239000006229 carbon black Substances 0.000 claims description 25
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 24
- 239000001110 calcium chloride Substances 0.000 claims description 24
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 24
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 23
- 239000002994 raw material Substances 0.000 claims description 23
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 22
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 22
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 22
- 239000004094 surface-active agent Substances 0.000 claims description 22
- 229920001661 Chitosan Polymers 0.000 claims description 20
- 239000002270 dispersing agent Substances 0.000 claims description 20
- QNILTEGFHQSKFF-UHFFFAOYSA-N n-propan-2-ylprop-2-enamide Chemical compound CC(C)NC(=O)C=C QNILTEGFHQSKFF-UHFFFAOYSA-N 0.000 claims description 20
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 claims description 19
- 229960000892 attapulgite Drugs 0.000 claims description 19
- 229910052625 palygorskite Inorganic materials 0.000 claims description 19
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 claims description 17
- KWYHDKDOAIKMQN-UHFFFAOYSA-N N,N,N',N'-tetramethylethylenediamine Chemical compound CN(C)CCN(C)C KWYHDKDOAIKMQN-UHFFFAOYSA-N 0.000 claims description 17
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 17
- 229940047670 sodium acrylate Drugs 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- 239000011837 N,N-methylenebisacrylamide Substances 0.000 claims description 14
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 claims description 14
- 238000010298 pulverizing process Methods 0.000 claims description 11
- 238000005303 weighing Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 7
- 239000002002 slurry Substances 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 4
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 4
- HLCFGWHYROZGBI-JJKGCWMISA-M Potassium gluconate Chemical compound [K+].OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C([O-])=O HLCFGWHYROZGBI-JJKGCWMISA-M 0.000 claims description 4
- 239000008103 glucose Substances 0.000 claims description 4
- 239000004224 potassium gluconate Substances 0.000 claims description 4
- 235000013926 potassium gluconate Nutrition 0.000 claims description 4
- 229960003189 potassium gluconate Drugs 0.000 claims description 4
- 239000000176 sodium gluconate Substances 0.000 claims description 4
- 235000012207 sodium gluconate Nutrition 0.000 claims description 4
- 229940005574 sodium gluconate Drugs 0.000 claims description 4
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 229960001031 glucose Drugs 0.000 claims description 3
- 235000001727 glucose Nutrition 0.000 claims description 3
- 239000010445 mica Substances 0.000 claims description 3
- 229910052618 mica group Inorganic materials 0.000 claims description 3
- NWGKJDSIEKMTRX-AAZCQSIUSA-N Sorbitan monooleate Chemical group CCCCCCCC\C=C/CCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O NWGKJDSIEKMTRX-AAZCQSIUSA-N 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 10
- 238000012986 modification Methods 0.000 abstract description 9
- 230000004048 modification Effects 0.000 abstract description 9
- 239000011812 mixed powder Substances 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 abstract description 2
- 238000011112 process operation Methods 0.000 abstract description 2
- 239000000499 gel Substances 0.000 description 14
- 238000010521 absorption reaction Methods 0.000 description 11
- 206010016807 Fluid retention Diseases 0.000 description 7
- 230000002745 absorbent Effects 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 4
- 239000003999 initiator Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008961 swelling Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 159000000007 calcium salts Chemical class 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000010902 jet-milling Methods 0.000 description 2
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 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
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- 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 1
- 150000001350 alkyl halides Chemical class 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 125000002791 glucosyl group Chemical group C1([C@H](O)[C@@H](O)[C@H](O)[C@H](O1)CO)* 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
- 238000001291 vacuum drying Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/0064—Gels; Film-forming compositions
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F251/00—Macromolecular compounds obtained by polymerising monomers on to polysaccharides or derivatives thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire-Extinguishing Compositions (AREA)
Abstract
The invention discloses an instant-prepared sodium alginate hydrogel fire extinguishing agent and a preparation method thereof, wherein the fire extinguishing agent comprises modified sodium alginate hydrogel, a filler and water-absorbent resin, the filler comprises a first additive, a second additive and a third additive, the first additive is a conventional dry powder fire extinguishing agent and comprises materials such as ammonium dihydrogen phosphate, ammonium sulfate, an auxiliary agent and the like, when the first additive is prepared, the main materials such as ammonium dihydrogen phosphate, ammonium sulfate and the like are firstly crushed by a supersonic airflow crusher to obtain superfine mixed powder, and the mixed powder has fine granularity, narrow granularity distribution and high integral surface activity and is convenient for subsequent modification; the invention discloses an instant-preparation type sodium alginate hydrogel fire extinguishing agent and a preparation method thereof, wherein the components are reasonably designed, the process operation is simple, the preparation of the sodium alginate hydrogel fire extinguishing agent can be realized, and the fire extinguishing agent has excellent fire extinguishing performance and higher practicability.
Description
Technical Field
The invention relates to the technical field of fire extinguishing agents, in particular to an instant-preparation type sodium alginate hydrogel fire extinguishing agent and a preparation method thereof.
Background
Among various disasters, a fire disaster is one of the main disasters which threaten public safety and social development most often and most generally, and a fire extinguisher is common fire-fighting and rescue equipment when the fire disaster happens.
The most common fire extinguishing agents in the existing fire extinguishing agents on the market comprise water fire extinguishing agents, dry powder fire extinguishing agents, foam fire extinguishing agents, carbon dioxide fire extinguishing agents and haloalkane fire extinguishing agents, and with the progress and development of science and technology, the hydrogel fire extinguishing agents gradually enter the sight of people, but the existing hydrogel fire extinguishing agents are poor in mechanical strength and can easily break through a covering layer formed by hydrogel particles when in use, so that combustible substances are contacted with air again, re-combustion is caused, and the use of people is influenced.
Aiming at the problem, an instant-preparation type sodium alginate hydrogel fire extinguishing agent and a preparation method thereof are designed, which are technical problems to be urgently solved.
Disclosure of Invention
The invention aims to provide an instant-preparation type sodium alginate hydrogel fire extinguishing agent and a preparation method thereof, and aims to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
an instant-prepared sodium alginate hydrogel fire extinguishing agent comprises the following raw materials: 10-20 parts of modified sodium alginate hydrogel, 55-75 parts of filler and 60-80 parts of water-absorbent resin.
According to an optimized scheme, the water-absorbent resin comprises the following raw materials: 3-8 parts of 2-acrylamide-2-methylpropanesulfonic acid, 8-10 parts of a dispersing agent, 8-12 parts of cyclohexane and 5-10 parts of chitosan by weight.
According to an optimized scheme, the modified sodium alginate hydrogel comprises the following raw materials in parts by weight: by weight, 9-18 parts of sodium alginate, 30-35 parts of acrylic acid, 10-20 parts of N-isopropyl acrylamide, 10-20 parts of N, N-methylene bisacrylamide, 2-5 parts of sodium acrylate, 3-6 parts of attapulgite, 10-20 parts of ammonium persulfate and 6-10 parts of tetramethyl ethylenediamine.
According to a more optimized scheme, the filler comprises a first additive, a second additive and a third additive, and the mass ratio of the first additive to the second additive to the third additive is 3: (1-1.2): (1-1.5).
According to a more optimized scheme, the raw materials of each component of the first additive comprise: 10-15 parts of ammonium dihydrogen phosphate, 10-15 parts of ammonium sulfate, 3-5 parts of an auxiliary agent, 6-9 parts of white carbon black and 15-25 parts of a fluorocarbon surfactant.
According to an optimized scheme, the second additive is any one or a mixture of more of glucose, sodium gluconate and potassium gluconate, the third additive comprises calcium chloride, calcium nitrate and calcium carbonate, and the mass ratio of the calcium chloride to the calcium nitrate to the calcium carbonate is 1: 1: (1-1.5).
According to an optimized scheme, the dispersant is span 80, and the auxiliary agent is prepared by mixing mica powder and talcum powder.
The invention discloses an instant-preparation type sodium alginate hydrogel fire extinguishing agent, which comprises modified sodium alginate hydrogel, a filler and water-absorbent resin, wherein the filler comprises a first additive, a second additive and a third additive, the first additive is a conventional dry powder fire extinguishing agent and comprises materials such as ammonium dihydrogen phosphate, ammonium sulfate, an auxiliary agent and the like, when the first additive is prepared, the main materials such as ammonium dihydrogen phosphate, ammonium sulfate and the like are firstly crushed by a supersonic airflow crusher to obtain superfine mixed powder, and the mixed powder has fine granularity, narrow granularity distribution and high integral surface activity, and is convenient for subsequent modification; meanwhile, an auxiliary agent is added in the crushing process, and is formed by mixing mica powder and talcum powder, so that the surface energy of each material can be reduced in the crushing process, the viscosity among the materials is reduced while the crushing efficiency is improved, the material dispersion is promoted, and the prepared first additive has high fluidity; white carbon black is also added during the preparation of the first additive, and the white carbon black subjected to jet milling can form steric hindrance effect on each component particle, so that each material particle is uniformly dispersed, and the subsequent modification operation is facilitated; in the modification process, the fluorocarbon surfactant is used for modification, and ammonium phosphate is easy to absorb moisture and hydrolyze, so that a large number of active groups (-OH) exist on the surface, and the fluorocarbon surfactant can generate a chemical action with the active groups (-OH) when the surface of the fluorocarbon surfactant is modified, so that the fluorocarbon surfactant can be coated on the surface of the powder, and the first additive has a certain hydrophobic and oleophobic effect and excellent afterburning resistance.
The invention also adds a second additive and a third additive, wherein the second additive is any one or a mixture of more of glucose, sodium gluconate and potassium gluconate, and the addition of the second additive can play a role in reducing or blocking the swelling process of the sodium alginateThe dissolving time of the sodium alginate can be reduced, and the using effect of the fire extinguishing agent is improved; meanwhile, the third additive comprises calcium chloride, calcium nitrate and calcium carbonate, wherein the calcium chloride and the calcium nitrate are soluble calcium salts and can be hydrolyzed to form Ca2+Sodium alginate and Ca2+The crosslinking forms a crosslinking network, the compactness of the modified sodium alginate hydrogel is further improved, and the flame retardant and fire extinguishing effects of the fire extinguishing agent are improved.
The modified sodium alginate hydrogel comprises sodium alginate, acrylic acid, N-isopropylacrylamide and other materials, wherein two gel materials are generated in the preparation process, one gel material is synthesized by taking the N-isopropylacrylamide and the acrylic acid as monomers, the gel material is sensitive to temperature, is soluble in water and easy to flow at room temperature, and can generate phase transition when the temperature is higher than 100 ℃, the surface tension is reduced, and the viscosity is increased.
The other is a gel material prepared by using sodium alginate and attapulgite as raw materials, potassium persulfate as an initiator and N, N-methylene-bisacrylamide as a cross-linking agent, and the gel material has high water absorption rate and can absorb water to swell; according to the invention, two materials (modified sodium alginate hydrogel) which are formed by mutually crosslinking and mixing two gel materials are prepared by adjusting reaction conditions, when the second gel material is used for connecting water molecules in a polymer network, the water absorption capacity is large, the water retention time is long, the surface temperature of a combustion object is rapidly reduced, and a fire source is eliminated, while the first gel material can prolong the retention fire extinguishing time of water on the surface of the combustion object, and the two gel materials are mutually matched, so that the fire extinguishing effect of the fire extinguishing agent can be further improved.
The water-absorbing resin is prepared by taking acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid and chitosan as raw materials, potassium persulfate as an initiator and N, N-methylene bisacrylamide as a cross-linking agent, and the acrylic acid and the 2-acrylamide-2-methylpropanesulfonic acid are taken as water-absorbing main bodies during preparation and are grafted to a chitosan molecular chain under the action of the initiator and the cross-linking agent to form a stable three-dimensional network space structure capable of storing a large amount of liquid.
According to an optimized scheme, the preparation method of the ready-to-prepare sodium alginate hydrogel fire extinguishing agent comprises the following steps:
1) preparing materials:
2) preparing a filler:
a) taking the ammonium dihydrogen phosphate prepared in the step 1), ammonium sulfate and an auxiliary agent, stirring and mixing, and then adding into a supersonic airflow pulverizer for pulverizing to obtain a superfine material A;
b) taking the white carbon black prepared in the step 1), and adding the white carbon black into a supersonic airflow pulverizer for pulverizing to obtain a superfine material B;
c) stirring and heating the superfine material A and the superfine material B to 40-45 ℃, adding the fluorocarbon surfactant dissolved by acetone, stirring at constant temperature, heating to 120-125 ℃, and fully reacting for 2-3h to obtain a first additive;
d) mixing the first additive and the second additive prepared in the step 1), stirring and mixing, adding calcium chloride, calcium nitrate and calcium carbonate, and continuously stirring and mixing to obtain a filler;
3) dissolving sodium alginate prepared in the step 1) with deionized water, stirring, adding acrylic acid and N-isopropylacrylamide, stirring under a nitrogen protection environment, adjusting the pH to 7, slowly dropwise adding N, N-methylenebisacrylamide, stirring, slowly adding sodium acrylate, continuously stirring, adding ultrasonically dispersed attapulgite slurry, stirring, adding ammonium persulfate and tetramethylethylenediamine, heating to 25-30 ℃, reacting for 12-16h, adding the filler prepared in the step 2), stirring at a constant temperature for 50-60min, heating to 60-75 ℃, and reacting for 2-3h to obtain a material C;
4) and (2) taking cyclohexane prepared in the step 1) and a dispersing agent, stirring, adding chitosan and a material C, heating to 40-50 ℃ in a nitrogen environment, continuing stirring, adding 2-acrylamide-2-methylpropanesulfonic acid, slowly heating to 70-80 ℃, continuously reacting for 3-4h, cooling to room temperature, soaking and washing with absolute ethyl alcohol, drying in vacuum, and grinding into powder to obtain the fire extinguishing agent.
The optimized scheme comprises the following steps:
1) preparing materials:
a) weighing 2-acrylamide-2-methylpropanesulfonic acid, a dispersant, cyclohexane, chitosan, ammonium dihydrogen phosphate, ammonium sulfate, an auxiliary agent, white carbon black and a fluorocarbon surfactant according to a proportion for later use;
b) weighing sodium alginate, acrylic acid, N-isopropylacrylamide, N-methylenebisacrylamide, sodium acrylate, attapulgite, ammonium persulfate, tetramethylethylenediamine, a second additive, calcium chloride, calcium nitrate and calcium carbonate according to a proportion for later use; the method has the advantages that 1), the material preparation is carried out, and the subsequent operation is convenient;
2) preparing a filler:
a) stirring ammonium dihydrogen phosphate, ammonium sulfate and auxiliary agent prepared in step 1) for 10-15min, adding into supersonic jet mill, and pulverizing for 10-20min to obtain superfine material A; in the step a), ammonium dihydrogen phosphate and ammonium sulfate are used as main bodies of the first additive, and are crushed into superfine powder by adopting a jet milling method, so that the effect of subsequent modification operation can be improved;
b) taking the white carbon black prepared in the step 1), adding the white carbon black into a supersonic airflow pulverizer, and pulverizing for 10-25min to obtain a superfine material B; the white carbon black is pulverized into superfine grade in the step b) through airflow, so that the white carbon black can play a role in blocking when being mixed with the superfine material A, the mixed material is ensured to be uniformly dispersed, and the subsequent modification treatment is convenient;
c) taking the superfine material A and the superfine material B, stirring and heating to 40-45 ℃, adding the fluorocarbon surfactant dissolved by acetone, stirring at a constant temperature for 2-3h at the stirring speed of 1500-; in the step c), fluorocarbon surfactant is used for surface modification, and the prepared first additive has excellent afterburning resistance;
d) mixing and stirring the first additive and the second additive prepared in the step 1) for 20-30min, adding calcium chloride, calcium nitrate and calcium carbonate, and continuously stirring for 20-30min to obtain a filler; mixing the components of the first additive, the second additive and the third additive in the step d) to obtain the filler;
3) dissolving the sodium alginate prepared in the step 1) with deionized water, stirring for 20-30min, adding acrylic acid and N-isopropylacrylamide, stirring for 20-30min under the nitrogen protection environment, adjusting the pH to 7, slowly dropwise adding N, N-methylenebisacrylamide, stirring for 20-30min, slowly adding sodium acrylate, continuously stirring for 10-20min, adding ultrasonically dispersed attapulgite slurry, stirring for 20-30min, adding ammonium persulfate and tetramethylethylenediamine, heating to 25-30 ℃, reacting for 12-16h, adding the filler prepared in the step 2), stirring at constant temperature for 50-60min, heating to 60-75 ℃, reacting for 2-3h, and obtaining a material C; in the step 3), materials such as sodium alginate, acrylic acid, N-isopropylacrylamide and the like are utilized to prepare modified sodium alginate hydrogel with two different gel materials mixed, and a filler is added and can be filled in a cross-linked network to form a cross-linked and wound compact structure;
4) and (2) taking cyclohexane and a dispersing agent prepared in the step 1), stirring for 10-20min, adding chitosan and a material C, heating to 40-50 ℃ in a nitrogen environment, continuing stirring for 20-30min, adding 2-acrylamide-2-methylpropanesulfonic acid, slowly heating to 70-80 ℃, continuously reacting for 3-4h, cooling to room temperature, soaking and washing for 2-3 times by using absolute ethyl alcohol, drying in vacuum at 70-80 ℃, and grinding into powder to obtain the fire extinguishing agent. In the step 4), materials such as cyclohexane, a dispersing agent and the like are used for preparing the water-absorbent resin, the modified sodium alginate has large dosage of an initiator and a cross-linking agent in the preparation process, chitosan and other materials can be matched to participate in reaction to form the water-absorbent resin, the water-absorbent resin wraps the surface of the material C prepared in the step 3), and the fire-extinguishing agent is formed after vacuum drying.
Compared with the prior art, the invention has the beneficial effects that:
when the composite material is prepared, a first additive is prepared, the first additive, a second additive and a third additive are mixed, wherein the first additive is a modified ultrafine particle mixture with re-combustion prevention, and the first additive, the second additive and the third additive are mixed and stirred to form a filler; secondly, preparing and generating two modified sodium alginate hydrogels in which the gel materials are cross-linked and wound by utilizing the raw materials of each component and controlling the reaction conditions, adding a filler when the hydrogel is prepared, wherein the filler can be distributed in the hydrogel, simultaneously, gaps with different sizes exist in the hydrogel due to the addition of attapulgite, and filling after the filler is added to finally obtain a material (material A) in which the filler and the modified sodium alginate hydrogels are mutually interlaced; after the material is obtained, the water-absorbent resin is prepared, and the material A is added, so that the water-absorbent resin is wrapped on the surface of the material A to form the fire extinguishing agent.
When putting out a fire, with fire extinguishing agent and water mixture, wherein the absorbent resin on fire extinguishing agent surface can the water swelling of absorbing, water infiltration to absorbent resin is inside after the saturation absorbs water, one of them gel water swelling of modification sodium alginate aquogel, the calcium salt that the third additive is soluble in water simultaneously, the calcium salt dissolves, the gel swelling can lead to the inside pressure increase of absorbent resin, cause outside absorbent resin to be destroyed, whole fire extinguishing agent spreads out and forms planar structure, when putting out a fire to the combustor, not only can reduce combustor surface temperature rapidly, eliminate the fire source, play the isolation of putting out a fire simultaneously, can improve the fire extinguishing residence time of moisture on the combustor surface, fire control effect is excellent.
The invention discloses an instant-preparation type sodium alginate hydrogel fire extinguishing agent and a preparation method thereof, wherein the components are reasonably designed, the process operation is simple, the preparation of the sodium alginate hydrogel fire extinguishing agent can be realized, and the fire extinguishing agent has excellent fire extinguishing performance and higher practicability.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
s1: preparing materials:
weighing 2-acrylamide-2-methylpropanesulfonic acid, a dispersant, cyclohexane, chitosan, ammonium dihydrogen phosphate, ammonium sulfate, an auxiliary agent, white carbon black and a fluorocarbon surfactant according to a proportion for later use;
weighing sodium alginate, acrylic acid, N-isopropylacrylamide, N-methylenebisacrylamide, sodium acrylate, attapulgite, ammonium persulfate, tetramethylethylenediamine, a second additive, calcium chloride, calcium nitrate and calcium carbonate according to a proportion for later use.
S2: preparing a filler:
taking ammonium dihydrogen phosphate, ammonium sulfate and auxiliary agent, stirring for 10min, adding into supersonic jet mill, and pulverizing for 10min to obtain superfine material A; adding white carbon black into a supersonic airflow pulverizer to pulverize for 10min to obtain superfine material B;
taking the superfine material A and the superfine material B, stirring and heating to 40 ℃, adding a fluorocarbon surfactant dissolved by acetone, stirring for 2 hours at a constant temperature, wherein the stirring speed is 1500r/min, heating to 120 ℃, and fully reacting for 2 hours to obtain a first additive;
and mixing and stirring the first additive and the second additive for 20min, adding calcium chloride, calcium nitrate and calcium carbonate, and continuously stirring for 20min to obtain the filler.
S3: dissolving sodium alginate in deionized water, stirring for 20min, adding acrylic acid and N-isopropylacrylamide, stirring for 20min under the nitrogen protection environment, adjusting the pH to 7, slowly dropwise adding N, N-methylenebisacrylamide, stirring for 20min, slowly adding sodium acrylate, continuously stirring for 10min, adding ultrasonically dispersed attapulgite slurry, stirring for 20min, adding ammonium persulfate and tetramethylethylenediamine, heating to 25 ℃, reacting for 12h, adding prepared filler, stirring at constant temperature for 50min, heating to 60 ℃, and reacting for 2h to obtain a material C;
s4: and (2) stirring cyclohexane and a dispersing agent for 10min, adding chitosan and the material C, heating to 40 ℃ in a nitrogen environment, continuing stirring for 20min, adding 2-acrylamide-2-methylpropanesulfonic acid, slowly heating to 70 ℃, continuously reacting for 3h, cooling to room temperature, soaking and washing with absolute ethyl alcohol for 2 times, drying in vacuum at 70 ℃, and grinding into powder to obtain the fire extinguishing agent.
In this embodiment, the fire extinguishing agent comprises the following raw materials: 10 parts of modified sodium alginate hydrogel, 55 parts of filler and 60 parts of water-absorbent resin. The water-absorbent resin comprises the following raw materials: by weight, 3 parts of 2-acrylamide-2-methylpropanesulfonic acid, 8 parts of a dispersing agent, 8 parts of cyclohexane and 5 parts of chitosan.
The modified sodium alginate hydrogel comprises the following raw materials in parts by weight: by weight, 9 parts of sodium alginate, 30 parts of acrylic acid, 10 parts of N-isopropyl acrylamide, 10 parts of N, N-methylene bisacrylamide, 2 parts of sodium acrylate, 3 parts of attapulgite, 10 parts of ammonium persulfate and 6 parts of tetramethyl ethylenediamine.
The filler comprises a first additive, a second additive and a third additive, and the mass ratio of the first additive to the second additive to the third additive is 3: 1: 1; the first additive comprises the following raw materials in parts by weight: 10 parts of ammonium dihydrogen phosphate, 10 parts of ammonium sulfate, 3 parts of an auxiliary agent, 6 parts of white carbon black and 15 parts of a fluorocarbon surfactant by weight; the second additive is glucose, the third additive comprises calcium chloride, calcium nitrate and calcium carbonate, and the mass ratio of the calcium chloride to the calcium nitrate to the calcium carbonate is 1: 1: 1.
example 2:
s1: preparing materials:
weighing 2-acrylamide-2-methylpropanesulfonic acid, a dispersant, cyclohexane, chitosan, ammonium dihydrogen phosphate, ammonium sulfate, an auxiliary agent, white carbon black and a fluorocarbon surfactant according to a proportion for later use;
weighing sodium alginate, acrylic acid, N-isopropylacrylamide, N-methylenebisacrylamide, sodium acrylate, attapulgite, ammonium persulfate, tetramethylethylenediamine, a second additive, calcium chloride, calcium nitrate and calcium carbonate according to a proportion for later use.
S2: preparing a filler:
taking ammonium dihydrogen phosphate, ammonium sulfate and auxiliary agent, stirring for 13min, adding into supersonic jet mill, and pulverizing for 15min to obtain superfine material A; adding white carbon black into a supersonic airflow pulverizer to pulverize for 15min to obtain superfine material B;
taking the superfine material A and the superfine material B, stirring and heating to 42 ℃, adding the fluorocarbon surfactant dissolved by acetone, stirring at constant temperature for 2.5 hours at the stirring speed of 1550r/min, heating to 123 ℃, and fully reacting for 2.5 hours to obtain a first additive;
and mixing and stirring the first additive and the second additive for 25min, adding calcium chloride, calcium nitrate and calcium carbonate, and continuously stirring for 25min to obtain the filler.
S3: dissolving sodium alginate in deionized water, stirring for 25min, adding acrylic acid and N-isopropylacrylamide, stirring for 25min under the nitrogen protection environment, adjusting the pH to 7, slowly dropwise adding N, N-methylenebisacrylamide, stirring for 25min, slowly adding sodium acrylate, continuously stirring for 15min, adding ultrasonically dispersed attapulgite slurry, stirring for 25min, adding ammonium persulfate and tetramethylethylenediamine, heating to 28 ℃, reacting for 14h, adding prepared filler, stirring at constant temperature for 55min, heating to 66 ℃, and reacting for 2.5h to obtain a material C;
s4: and (2) taking cyclohexane and a dispersing agent, stirring for 15min, adding chitosan and a material C, heating to 45 ℃ in a nitrogen environment, continuing stirring for 25min, adding 2-acrylamide-2-methylpropanesulfonic acid, slowly heating to 75 ℃, continuously reacting for 3.5h, cooling to room temperature, soaking and washing with absolute ethyl alcohol for 3 times, drying in vacuum at 75 ℃, and grinding into powder to obtain the fire extinguishing agent.
In this embodiment, the fire extinguishing agent comprises the following raw materials: 15 parts of modified sodium alginate hydrogel, 65 parts of filler and 70 parts of water-absorbent resin. The water-absorbent resin comprises the following raw materials: 6 parts of 2-acrylamide-2-methylpropanesulfonic acid, 9 parts of a dispersing agent, 10 parts of cyclohexane and 8 parts of chitosan.
The modified sodium alginate hydrogel comprises the following raw materials in parts by weight: by weight, 15 parts of sodium alginate, 34 parts of acrylic acid, 15 parts of N-isopropyl acrylamide, 15 parts of N, N-methylene bisacrylamide, 2-5 parts of sodium acrylate, 5 parts of attapulgite, 15 parts of ammonium persulfate and 8 parts of tetramethyl ethylenediamine.
The filler comprises a first additive, a second additive and a third additive, and the mass ratio of the first additive to the second additive to the third additive is 3: 1.1: 1.3; the first additive comprises the following raw materials in parts by weight: 13 parts of ammonium dihydrogen phosphate, 13 parts of ammonium sulfate, 4 parts of an auxiliary agent, 7 parts of white carbon black and 20 parts of a fluorocarbon surfactant by weight; the second additive is sodium gluconate, the third additive comprises calcium chloride, calcium nitrate and calcium carbonate, and the mass ratio of the calcium chloride to the calcium nitrate to the calcium carbonate is 1: 1: 1.2.
example 3:
s1: preparing materials:
weighing 2-acrylamide-2-methylpropanesulfonic acid, a dispersant, cyclohexane, chitosan, ammonium dihydrogen phosphate, ammonium sulfate, an auxiliary agent, white carbon black and a fluorocarbon surfactant according to a proportion for later use;
weighing sodium alginate, acrylic acid, N-isopropylacrylamide, N-methylenebisacrylamide, sodium acrylate, attapulgite, ammonium persulfate, tetramethylethylenediamine, a second additive, calcium chloride, calcium nitrate and calcium carbonate according to a proportion for later use.
S2: preparing a filler:
taking ammonium dihydrogen phosphate, ammonium sulfate and auxiliary agent, stirring for 15min, adding into supersonic jet mill, and pulverizing for 20min to obtain superfine material A; adding white carbon black into a supersonic airflow pulverizer to pulverize for 25min to obtain superfine material B;
taking the superfine material A and the superfine material B, stirring and heating to 45 ℃, adding a fluorocarbon surfactant dissolved by acetone, stirring for 3 hours at a constant temperature, wherein the stirring speed is 1600r/min, heating to 125 ℃, and fully reacting for 3 hours to obtain a first additive;
and mixing and stirring the first additive and the second additive for 30min, adding calcium chloride, calcium nitrate and calcium carbonate, and continuously stirring for 30min to obtain the filler.
S3: dissolving sodium alginate in deionized water, stirring for 30min, adding acrylic acid and N-isopropylacrylamide, stirring for 30min under the nitrogen protection environment, adjusting the pH to 7, slowly dropwise adding N, N-methylenebisacrylamide, stirring for 30min, slowly adding sodium acrylate, continuously stirring for 20min, adding ultrasonically dispersed attapulgite slurry, stirring for 30min, adding ammonium persulfate and tetramethylethylenediamine, heating to 30 ℃, reacting for 16h, adding prepared filler, stirring at constant temperature for 60min, heating to 75 ℃, and reacting for 3h to obtain a material C;
s4: and (2) stirring cyclohexane and a dispersing agent for 20min, adding chitosan and the material C, heating to 50 ℃ in a nitrogen environment, continuing stirring for 30min, adding 2-acrylamide-2-methylpropanesulfonic acid, slowly heating to 80 ℃, continuously reacting for 4h, cooling to room temperature, soaking and washing with absolute ethyl alcohol for 3 times, drying in vacuum at 80 ℃, and grinding into powder to obtain the fire extinguishing agent.
In this embodiment, the fire extinguishing agent comprises the following raw materials: 20 parts of modified sodium alginate hydrogel, 75 parts of filler and 80 parts of water-absorbent resin. The water-absorbent resin comprises the following raw materials: 8 parts of 2-acrylamide-2-methylpropanesulfonic acid, 10 parts of a dispersing agent, 12 parts of cyclohexane and 10 parts of chitosan.
The modified sodium alginate hydrogel comprises the following raw materials in parts by weight: by weight, 18 parts of sodium alginate, 35 parts of acrylic acid, 20 parts of N-isopropyl acrylamide, 20 parts of N, N-methylene bisacrylamide, 5 parts of sodium acrylate, 6 parts of attapulgite, 20 parts of ammonium persulfate and 10 parts of tetramethyl ethylenediamine.
The filler comprises a first additive, a second additive and a third additive, and the mass ratio of the first additive to the second additive to the third additive is 3: 1.2: 1.5; the first additive comprises the following raw materials in parts by weight: 10-15 parts of ammonium dihydrogen phosphate, 15 parts of ammonium sulfate, 5 parts of an auxiliary agent, 9 parts of white carbon black and 25 parts of a fluorocarbon surfactant by weight; the second additive is potassium gluconate, the third additive comprises calcium chloride, calcium nitrate and calcium carbonate, and the mass ratio of the calcium chloride to the calcium nitrate to the calcium carbonate is 1: 1: 1.5.
detection experiment 1:
the following test experiments were performed on the fire extinguishing agent samples 1 to 3 prepared in examples 1 to 3, respectively:
1. samples 1-3 were taken and analyzed by a thermal analyzer, respectively, with the temperature rising from room temperature to 600 ℃, the rate of temperature rise being 20 ℃/min, under nitrogen protection.
2. And (3) water absorption measurement: taking 0.1g of samples 1-3, respectively putting the samples into 1000ml of distilled water, standing for 24h, filtering out unabsorbed water by using filter cloth, weighing the absorbed samples, and calculating the water absorption according to the following formula:
wherein Q is the water absorption, m2Mass m of the sample after water absorption1Is the sample mass before water absorption.
3. Testing the water retention: taking 1-3 samples after water absorption saturation, putting the samples into a drying oven, setting the temperature to be 50 ℃, measuring the mass of the samples every 1h, and calculating the water retention rate according to the following formula:
wherein Q is water retention, m2Mass m of the sample after water absorptionnThe sample mass measured every 1h (n is 1,2,3 … … n).
The conclusion is that ① for test 1, the mass loss of samples 1-3 was between 10-18% when the temperature was raised to about 250 ℃, between 25-30% when the temperature was raised to 400 ℃, and between 40-45% when the temperature was raised to 600 ℃.
From the above, the fire extinguishing agent prepared by the present application is particularly excellent in high-temperature stability.
②, the water absorption capacity of samples 1-3 was between 900-1050 g/g.
③ the water retention test was carried out, and the water retention of examples 1 to 3 was up to 60 to 70% at a temperature of 50 ℃.
From the above, the fire extinguishing agent prepared by the method has excellent water absorption and water retention performances.
Detection experiment 2:
the fire extinguishing agent samples prepared in examples 1-3 were mixed with 1000 times of water, and left to stand for 1 hour to form a water absorbing gel, which was sprayed into a fire using a spray gun.
The experimental conditions are as follows: ten kilograms of wood and 1 liter of gasoline are respectively taken, ignited and a stopwatch is used for measuring the fire extinguishing time.
After detection, the fire extinguishing time of the samples 1-3 is 15-30s, and the fluidity is better when the spray gun sprays the fire extinguishing agent.
And (4) conclusion: the fire extinguishing agent prepared by the invention has excellent isolation fire extinguishing effect.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. An instant-prepared sodium alginate hydrogel fire extinguishing agent is characterized in that: the fire extinguishing agent comprises the following raw materials: 10-20 parts of modified sodium alginate hydrogel, 55-75 parts of filler and 60-80 parts of water-absorbent resin.
2. The ready-to-use sodium alginate hydrogel fire extinguishing agent as claimed in claim 1, wherein: the water-absorbing resin comprises the following raw materials: 3-8 parts of 2-acrylamide-2-methylpropanesulfonic acid, 8-10 parts of a dispersing agent, 8-12 parts of cyclohexane and 5-10 parts of chitosan by weight.
3. The ready-to-use sodium alginate hydrogel fire extinguishing agent as claimed in claim 1, wherein: the modified sodium alginate hydrogel comprises the following raw materials: by weight, 9-18 parts of sodium alginate, 30-35 parts of acrylic acid, 10-20 parts of N-isopropyl acrylamide, 10-20 parts of N, N-methylene bisacrylamide, 2-5 parts of sodium acrylate, 3-6 parts of attapulgite, 10-20 parts of ammonium persulfate and 6-10 parts of tetramethyl ethylenediamine.
4. The ready-to-use sodium alginate hydrogel fire extinguishing agent as claimed in claim 2, wherein: the filler comprises a first additive, a second additive and a third additive, wherein the mass ratio of the first additive to the second additive to the third additive is 3: (1-1.2): (1-1.5).
5. The ready-to-use sodium alginate hydrogel fire extinguishing agent as claimed in claim 4, wherein: the first additive comprises the following raw materials in parts by weight: 10-15 parts of ammonium dihydrogen phosphate, 10-15 parts of ammonium sulfate, 3-5 parts of an auxiliary agent, 6-9 parts of white carbon black and 15-25 parts of a fluorocarbon surfactant.
6. The ready-to-use sodium alginate hydrogel fire extinguishing agent as claimed in claim 4, wherein: the second additive is any one or a mixture of more of glucose, sodium gluconate and potassium gluconate, the third additive comprises calcium chloride, calcium nitrate and calcium carbonate, and the mass ratio of the calcium chloride to the calcium nitrate to the calcium carbonate is 1: 1: (1-1.5).
7. The ready-to-use sodium alginate hydrogel fire extinguishing agent as claimed in claim 5, wherein: the dispersant is span 80, and the auxiliary agent is prepared by mixing mica powder and talcum powder.
8. A preparation method of an instant sodium alginate hydrogel fire extinguishing agent is characterized by comprising the following steps: the method comprises the following steps:
1) preparing materials:
2) preparing a filler:
a) taking the ammonium dihydrogen phosphate prepared in the step 1), ammonium sulfate and an auxiliary agent, stirring and mixing, and then adding into a supersonic airflow pulverizer for pulverizing to obtain a superfine material A;
b) taking the white carbon black prepared in the step 1), and adding the white carbon black into a supersonic airflow pulverizer for pulverizing to obtain a superfine material B;
c) stirring and heating the superfine material A and the superfine material B to 40-45 ℃, adding the fluorocarbon surfactant dissolved by acetone, stirring at constant temperature, heating to 120-125 ℃, and fully reacting for 2-3h to obtain a first additive;
d) mixing the first additive and the second additive prepared in the step 1), stirring and mixing, adding calcium chloride, calcium nitrate and calcium carbonate, and continuously stirring and mixing to obtain a filler;
3) dissolving sodium alginate prepared in the step 1) with deionized water, stirring, adding acrylic acid and N-isopropylacrylamide, stirring under a nitrogen protection environment, adjusting the pH to 7, slowly dropwise adding N, N-methylenebisacrylamide, stirring, slowly adding sodium acrylate, continuously stirring, adding ultrasonically dispersed attapulgite slurry, stirring, adding ammonium persulfate and tetramethylethylenediamine, heating to 25-30 ℃, reacting for 12-16h, adding the filler prepared in the step 2), stirring at a constant temperature for 50-60min, heating to 60-75 ℃, and reacting for 2-3h to obtain a material C;
4) and (2) taking cyclohexane prepared in the step 1) and a dispersing agent, stirring, adding chitosan and a material C, heating to 40-50 ℃ in a nitrogen environment, continuing stirring, adding 2-acrylamide-2-methylpropanesulfonic acid, slowly heating to 70-80 ℃, continuously reacting for 3-4h, cooling to room temperature, soaking and washing with absolute ethyl alcohol, drying in vacuum, and grinding into powder to obtain the fire extinguishing agent.
9. The preparation method of the instant sodium alginate hydrogel fire extinguishing agent as claimed in claim 8, wherein the preparation method comprises the following steps: the method comprises the following steps:
1) preparing materials:
a) weighing 2-acrylamide-2-methylpropanesulfonic acid, a dispersant, cyclohexane, chitosan, ammonium dihydrogen phosphate, ammonium sulfate, an auxiliary agent, white carbon black and a fluorocarbon surfactant according to a proportion for later use;
b) weighing sodium alginate, acrylic acid, N-isopropylacrylamide, N-methylenebisacrylamide, sodium acrylate, attapulgite, ammonium persulfate, tetramethylethylenediamine, a second additive, calcium chloride, calcium nitrate and calcium carbonate according to a proportion for later use;
2) preparing a filler:
a) stirring ammonium dihydrogen phosphate, ammonium sulfate and auxiliary agent prepared in step 1) for 10-15min, adding into supersonic jet mill, and pulverizing for 10-20min to obtain superfine material A;
b) taking the white carbon black prepared in the step 1), adding the white carbon black into a supersonic airflow pulverizer, and pulverizing for 10-25min to obtain a superfine material B;
c) taking the superfine material A and the superfine material B, stirring and heating to 40-45 ℃, adding the fluorocarbon surfactant dissolved by acetone, stirring at a constant temperature for 2-3h at the stirring speed of 1500-;
d) mixing and stirring the first additive and the second additive prepared in the step 1) for 20-30min, adding calcium chloride, calcium nitrate and calcium carbonate, and continuously stirring for 20-30min to obtain a filler;
3) dissolving the sodium alginate prepared in the step 1) with deionized water, stirring for 20-30min, adding acrylic acid and N-isopropylacrylamide, stirring for 20-30min under the nitrogen protection environment, adjusting the pH to 7, slowly dropwise adding N, N-methylenebisacrylamide, stirring for 20-30min, slowly adding sodium acrylate, continuously stirring for 10-20min, adding ultrasonically dispersed attapulgite slurry, stirring for 20-30min, adding ammonium persulfate and tetramethylethylenediamine, heating to 25-30 ℃, reacting for 12-16h, adding the filler prepared in the step 2), stirring at constant temperature for 50-60min, heating to 60-75 ℃, reacting for 2-3h, and obtaining a material C;
4) and (2) taking cyclohexane and a dispersing agent prepared in the step 1), stirring for 10-20min, adding chitosan and a material C, heating to 40-50 ℃ in a nitrogen environment, continuing stirring for 20-30min, adding 2-acrylamide-2-methylpropanesulfonic acid, slowly heating to 70-80 ℃, continuously reacting for 3-4h, cooling to room temperature, soaking and washing for 2-3 times by using absolute ethyl alcohol, drying in vacuum at 70-80 ℃, and grinding into powder to obtain the fire extinguishing agent.
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| CN113426059A (en) * | 2021-06-10 | 2021-09-24 | 中国科学技术大学 | Organic/inorganic hybrid core-shell structure fire extinguishing agent suitable for extinguishing lithium ion battery fire and preparation method thereof |
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| CN113426059B (en) * | 2021-06-10 | 2022-03-01 | 中国科学技术大学 | Organic/inorganic hybrid core-shell structure fire extinguishing agent suitable for extinguishing lithium ion battery fire and preparation method thereof |
| CN114455894A (en) * | 2022-02-23 | 2022-05-10 | 日照弗尔曼新材料科技有限公司 | Cement-based light fire-extinguishing mortar and preparation method thereof |
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| CN111282187B (en) | 2021-05-14 |
| CN113069706B (en) | 2022-07-12 |
| CN113069706A (en) | 2021-07-06 |
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