CN113354992A - Aerogel thermal insulation water-based paint and preparation method and application thereof - Google Patents
Aerogel thermal insulation water-based paint and preparation method and application thereof Download PDFInfo
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- CN113354992A CN113354992A CN202110680728.3A CN202110680728A CN113354992A CN 113354992 A CN113354992 A CN 113354992A CN 202110680728 A CN202110680728 A CN 202110680728A CN 113354992 A CN113354992 A CN 113354992A
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- 239000004964 aerogel Substances 0.000 title claims abstract description 135
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 238000009413 insulation Methods 0.000 title claims abstract description 54
- 239000003973 paint Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 74
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 54
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 51
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 48
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 48
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 48
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 48
- 239000000843 powder Substances 0.000 claims abstract description 43
- 238000000576 coating method Methods 0.000 claims abstract description 39
- 239000002562 thickening agent Substances 0.000 claims abstract description 36
- 239000011248 coating agent Substances 0.000 claims abstract description 34
- 239000002270 dispersing agent Substances 0.000 claims abstract description 31
- 239000004094 surface-active agent Substances 0.000 claims abstract description 31
- 238000000227 grinding Methods 0.000 claims abstract description 29
- 238000002156 mixing Methods 0.000 claims abstract description 25
- 239000003995 emulsifying agent Substances 0.000 claims abstract description 24
- 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 claims abstract description 22
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 22
- 239000003063 flame retardant Substances 0.000 claims abstract description 22
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 239000000945 filler Substances 0.000 claims abstract description 19
- 238000009775 high-speed stirring Methods 0.000 claims abstract description 19
- 239000000049 pigment Substances 0.000 claims abstract description 19
- 239000000839 emulsion Substances 0.000 claims abstract description 18
- 229920002125 Sokalan® Polymers 0.000 claims abstract description 16
- 239000004584 polyacrylic acid Substances 0.000 claims abstract description 16
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 25
- 230000002209 hydrophobic effect Effects 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 13
- 239000004705 High-molecular-weight polyethylene Substances 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 12
- 230000000996 additive effect Effects 0.000 claims description 12
- 229920001276 ammonium polyphosphate Polymers 0.000 claims description 12
- 229920001223 polyethylene glycol Polymers 0.000 claims description 12
- 239000004114 Ammonium polyphosphate Substances 0.000 claims description 11
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims description 11
- 229920001214 Polysorbate 60 Polymers 0.000 claims description 9
- HVUMOYIDDBPOLL-XWVZOOPGSA-N Sorbitan monostearate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XWVZOOPGSA-N 0.000 claims description 9
- 239000008399 tap water Substances 0.000 claims description 9
- 235000020679 tap water Nutrition 0.000 claims description 9
- 239000001913 cellulose Substances 0.000 claims description 7
- 229920002678 cellulose Polymers 0.000 claims description 7
- 239000013530 defoamer Substances 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 6
- 229920000142 Sodium polycarboxylate Polymers 0.000 claims description 6
- -1 alcohol ester Chemical class 0.000 claims description 6
- 125000000524 functional group Chemical group 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
- 239000002480 mineral oil Substances 0.000 claims description 6
- 235000010446 mineral oil Nutrition 0.000 claims description 6
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 14
- 239000002994 raw material Substances 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 239000000203 mixture Substances 0.000 abstract description 5
- 231100000252 nontoxic Toxicity 0.000 abstract description 2
- 230000003000 nontoxic effect Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 6
- 238000005452 bending Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 description 3
- 239000004354 Hydroxyethyl cellulose Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 description 3
- 239000002966 varnish Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000007761 roller coating Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- MOBNLCPBAMKACS-UHFFFAOYSA-N 2-(1-chloroethyl)oxirane Chemical compound CC(Cl)C1CO1 MOBNLCPBAMKACS-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000006184 cosolvent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- 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 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/43—Thickening agents
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
Abstract
The invention discloses an aerogel thermal insulation water-based paint which is prepared by the following steps: mixing emulsifier and dispersant uniformly, adding water and SiO2Slowly adding surfactant into aerogel powder under stirring, and continuously stirring to obtain SiO2An aerogel slurry; mixing the mixture with water-based polyacrylic acid emulsion and continuously stirring the mixture; then adding the defoaming agent, the film-forming assistant and the flame retardant in sequence and then continuously stirring; and finally, adding the pigment filler and the thickening agent into a high-speed grinding machine together for high-speed stirring and grinding to obtain the aerogel thermal insulation water-based coating. The invention also discloses a preparation method and application thereof. The preparation process of the water-based paint is simpleThe process is green and environment-friendly, and the cost is low; all the raw materials are nontoxic and harmless, green and environment-friendly, are easy to store, have no potential safety hazard, and do not produce any harm to human bodies and environment in the preparation process; and each performance is excellent.
Description
Technical Field
The invention relates to the technical field of heat-insulating coatings, in particular to an aerogel heat-insulating water-based coating and a preparation method and application thereof.
Background
At present, the problems of energy shortage and environmental pollution are increasingly outstanding, the energy is saved, the consumption is reduced,Improving the effective utilization rate of energy is a trend of current social development. Energy consumption in China, including the fields of building, petrochemical industry, metallurgy, thermoelectricity, automobiles and the like, is huge because of the backward loss of heat insulation materials. Therefore, the development of the high-performance heat-insulating water-based paint has great economic benefit and social benefit. SiO22The aerogel has a unique structure, shows the characteristics of low thermal conductivity, low density and the like, and has extremely wide application in the field of heat-insulating water-based coatings. Thus, SiO was prepared2The aerogel heat-insulation water-based paint can effectively save energy and improve the effective utilization rate of energy.
Chinese patent CN111117421A (published by 2020.05.08) discloses an aerogel composite coating and application thereof in a downhole oil pipe2Aerogel powder, water-based epoxy resin, hollow glass beads, a surface modifier, a film-forming assistant, a leveling agent and a defoaming agent in a mass ratio of 10: 50-100: 10-20: 5-10: 3-5: 0.1 to 1.0: 1-2, mixing to prepare the aerogel thermal insulation composite coating. The coating prepared by the method has the advantages of outstanding heat insulation performance, strong adhesion and long-term adaptation to the oil-water environment in the well, and can obviously reduce the wax deposition phenomenon of an oil pipe; the method has the disadvantages of complex process and certain harm to human body and environment caused by the used raw materials (such as methyl epichlorohydrin and the like).
Chinese patent CN109913007A (published date 2019.06.21) discloses water-soluble SiO2The invention discloses a preparation method and application of aerogel external wall reflective heat insulation coating, which mainly comprises the following two steps: (1) SiO22Preparation of aerogel slurries containing to SiO2Modifying the aerogel and preparing aerogel slurry; (2) SiO22And (4) preparing the aerogel coating. The invention has the advantages of solving the problem of hydrophobic SiO2Limitation of aerogels in water-soluble thermal insulation coatings; the method has the disadvantages of complicated preparation process and SiO2The cosolvent used in the aerogel modification process is an organic matter, which not only causes certain harm to human bodies and the environment and has potential safety hazard in the operation process, but also can cause the VOC content of the coating to be too highHigh.
Disclosure of Invention
The invention aims to provide an aerogel thermal insulation water-based paint, and a preparation method and application thereof, so as to solve the defects of the prior art.
The invention adopts the following technical scheme:
the aerogel thermal insulation water-based paint is prepared by the following steps:
(1) mixing emulsifier and dispersant uniformly, adding water and SiO2Slowly adding surfactant into aerogel powder under stirring, and continuously stirring to obtain SiO2An aerogel slurry; wherein, SiO2The aerogel powder is hydrophobic SiO2The aerogel powder is prepared by mixing an aerogel powder, an emulsifier, a dispersant and a surfactant, wherein the emulsifier is one or more of tween 60, span 60 and high molecular weight polyethylene glycol, the dispersant is a sodium polycarboxylate dispersant, and the surfactant is an amino functional group silane coupling agent;
(2) SiO in the step (1)2Mixing the aerogel slurry with the water-based polyacrylic acid emulsion, and continuously stirring to obtain polyacrylic acid-aerogel mixed liquid;
(3) sequentially adding a defoaming agent, a film-forming assistant and a flame retardant into the polyacrylic acid-aerogel mixed liquid obtained in the step (2), and then continuously stirring to obtain an aerogel heat-insulation water-based coating intermediate; wherein the defoaming agent is a mineral oil defoaming agent, the film-forming assistant is alcohol ester 12, and the flame retardant is ammonium polyphosphate;
(4) adding the aerogel heat-insulation water-based paint intermediate in the step (3) together with a pigment filler and a thickening agent into a high-speed grinding machine for high-speed stirring and grinding to obtain the aerogel heat-insulation water-based paint; wherein the pigment and filler is rutile type TiO2The thickening agent is one or more of cellulose thickening agent and inorganic salt thickening agent;
wherein, the water-based polyacrylic acid emulsion and the SiO2The additive amounts of the aerogel powder, the emulsifier, the dispersant, the surfactant, the defoamer, the film forming additive, the flame retardant, the pigment filler, the thickener and the water are as follows by mass ratio: 200-450: 8-20: 0.5-1:0.1～1：0.2～2：0.1～1：1～3：3～5：5～8：1～3：100～200。
further, the stirring speed in the step (1) is 300r/min to 750r/min, and the continuous stirring time is 5min to 30min after the surfactant is added; in the step (2), the stirring speed is 600 r/min-1200 r/min, and the continuous stirring time is 30 min-90 min; in the step (3), the stirring speed is 700 r/min-1500 r/min, and the continuous stirring time is 90 min-150 min; the high-speed stirring and grinding in the step (4) has the rotating speed of 2000 r/min-3500 r/min and the high-speed stirring and grinding time of 120 min-180 min.
Further, the water in the step (1) is deionized water or tap water; the molecular weight of the high molecular weight polyethylene glycol is more than or equal to 2000.
Further, the particle size of the hydrophobic SiO2 aerogel powder in the step (1) is 1-50 μm; rutile type TiO in step (4)2The particle size of (B) is 200 to 300 μm.
A preparation method of aerogel thermal insulation water-based paint comprises the following steps:
(1) mixing emulsifier and dispersant uniformly, adding water and SiO2Slowly adding surfactant into aerogel powder under stirring, and continuously stirring to obtain SiO2An aerogel slurry; wherein, SiO2The aerogel powder is hydrophobic SiO2The aerogel powder is prepared by mixing an aerogel powder, an emulsifier, a dispersant and a surfactant, wherein the emulsifier is one or more of tween 60, span 60 and high molecular weight polyethylene glycol, the dispersant is a sodium polycarboxylate dispersant, and the surfactant is an amino functional group silane coupling agent;
(2) SiO in the step (1)2Mixing the aerogel slurry with the water-based polyacrylic acid emulsion, and continuously stirring to obtain polyacrylic acid-aerogel mixed liquid;
(3) sequentially adding a defoaming agent, a film-forming assistant and a flame retardant into the polyacrylic acid-aerogel mixed liquid obtained in the step (2), and then continuously stirring to obtain an aerogel heat-insulation water-based coating intermediate; wherein the defoaming agent is a mineral oil defoaming agent, the film-forming assistant is alcohol ester 12, and the flame retardant is ammonium polyphosphate;
(4) the aerogel heat-preservation and heat-insulation water-based paint intermediate in the step (3) is mixed with pigment and filler,Adding the thickening agent into a high-speed grinder together for high-speed stirring and grinding to obtain the aerogel heat-insulation water-based coating; wherein the pigment and filler is rutile type TiO2The thickening agent is one or more of cellulose thickening agent and inorganic salt thickening agent;
wherein, the water-based polyacrylic acid emulsion and the SiO2The additive amounts of the aerogel powder, the emulsifier, the dispersant, the surfactant, the defoamer, the film forming additive, the flame retardant, the pigment filler, the thickener and the water are as follows by mass ratio: 200-450: 8-20: 0.5-1: 0.1-1: 0.2-2: 0.1-1: 1-3: 3-5: 5-8: 1-3: 100-200.
Further, the stirring speed in the step (1) is 300r/min to 750r/min, and the continuous stirring time is 5min to 30min after the surfactant is added; in the step (2), the stirring speed is 600 r/min-1200 r/min, and the continuous stirring time is 30 min-90 min; in the step (3), the stirring speed is 700 r/min-1500 r/min, and the continuous stirring time is 90 min-150 min; the high-speed stirring and grinding in the step (4) has the rotating speed of 2000 r/min-3500 r/min and the high-speed stirring and grinding time of 120 min-180 min.
Further, the water in the step (1) is deionized water or tap water; the molecular weight of the high molecular weight polyethylene glycol is more than or equal to 2000.
Further, the particle size of the hydrophobic SiO2 aerogel powder in the step (1) is 1-50 μm; rutile type TiO in step (4)2The particle size of (B) is 200 to 300 μm.
The aerogel thermal insulation water-based paint is applied to a metal base material.
Further, the metal substrate comprises stainless steel, an aluminum alloy, or iron.
The invention has the beneficial effects that:
1. the preparation process of the water-based paint is simple, the process is green and environment-friendly, and the cost is low.
2. All raw materials used for preparing the water-based paint are nontoxic and harmless, green and environment-friendly, easy to store, free of potential safety hazard, and free of any harm to human bodies and environment in the preparation process.
3. The water-based paint disclosed by the invention has excellent heat insulation performance, bending resistance, adhesive force, water resistance, stain resistance, acid and alkali resistance, washing resistance, hydrophobic self-cleaning performance and anti-condensation performance, can be stored at a low temperature for a long time, and is safe and environment-friendly.
4. The water-based paint disclosed by the invention can be suitable for the surfaces of various metal base materials, and can adopt various construction modes including brushing, roller coating and spraying.
5. The invention firstly prepares hydrophobic SiO2The aerogel powder, the emulsifier, the dispersant, the surfactant and the water are mixed to form slurry, whether the aerogel powder is uniformly dispersed can be distinguished by naked eyes, the aerogel powder is easily and uniformly dispersed in the rest components of the water-based paint in the form of the slurry, the operation is simple and easy, and the method is suitable for industrialization.
6. The flame retardant is ammonium polyphosphate, the thickening agent is one or more of cellulose thickening agents and inorganic salt thickening agents, and the ammonium polyphosphate can be cooperatively matched with the thickening agent, so that the viscosity of the water-based paint can be sprayed on the premise of using less thickening agents as far as possible, and the phenomenon of sagging can not be generated when the one-time construction thickness is more than 3mm, and meanwhile, the cost of the paint can be effectively reduced and the flame retardant property can be endowed.
7. The proportion, the processing steps and the parameters adopted by the invention are matched with the components used in the invention, and the proportion of the raw materials of the invention is to reduce the cost as much as possible under the condition of keeping the performance indexes of the raw materials stable in principle; the processing steps of the invention have strong operability and safe operation process, the used equipment and instruments are simple and easy to purchase, and the processing steps can be carried out at normal temperature; the processing parameters of the invention keep that various raw materials are not decomposed and lost and are uniformly dispersed under the processing technology, and particularly, the water-based polyacrylic acid emulsion does not generate emulsion breaking phenomenon under the processing technology, thereby ensuring the stability of the film-forming property of the water-based paint.
Detailed Description
The present invention will be further explained with reference to examples. The following examples are provided only for illustrating the present invention and are not intended to limit the scope of the present invention.
The aerogel thermal insulation water-based paint is prepared by the following steps:
(1) mixing emulsifier and dispersant uniformly, adding water and SiO2Slowly adding surfactant (so that the surfactant can be quickly and uniformly mixed with the above-mentioned mixture under the condition of stirring process to make it be formed into slurry in a short time) into aerogel powder, then continuously stirring so as to obtain SiO2An aerogel slurry; wherein, SiO2The aerogel powder is hydrophobic SiO2The particle size of the aerogel powder is 1-50 microns, wherein the hydrophobic SiO2 aerogel powder is prepared by mixing the raw materials; the emulsifier is one or more of tween 60, span 60 and high molecular weight polyethylene glycol, and the molecular weight of the high molecular weight polyethylene glycol is more than or equal to 2000; the dispersant is a sodium polycarboxylate dispersant, the surfactant is an amino functional group silane coupling agent, and the water is deionized water or tap water; the stirring speed is 300r/min to 750r/min, and the continuous stirring time is 5min to 30min after the surfactant is added;
(2) SiO in the step (1)2Mixing the aerogel slurry with the water-based polyacrylic acid emulsion, and continuously stirring to obtain polyacrylic acid-aerogel mixed liquid; the stirring speed is 600 r/min-1200 r/min, and the continuous stirring time is 30 min-90 min;
(3) sequentially adding a defoaming agent, a film-forming assistant and a flame retardant into the polyacrylic acid-aerogel mixed liquid obtained in the step (2), and then continuously stirring to obtain an aerogel heat-insulation water-based coating intermediate; wherein the defoaming agent is a mineral oil defoaming agent, the film-forming assistant is alcohol ester 12, and the flame retardant is ammonium polyphosphate; the stirring speed is 700 r/min-1500 r/min, and the continuous stirring time is 90 min-150 min;
(4) adding the aerogel heat-insulation water-based paint intermediate in the step (3) together with a pigment filler and a thickening agent into a high-speed grinding machine for high-speed stirring and grinding to obtain the aerogel heat-insulation water-based paint; wherein the pigment and filler is rutile type TiO2Rutile type TiO2The particle size of (A) is 200-300 μm; the thickener is one or more of cellulose thickener and inorganic salt thickener; the high-speed stirring and grinding speed is 2000r/min to 3500r/min, and the high-speed stirring and grinding time is 120min to 180min；
Wherein, the water-based polyacrylic acid emulsion and the SiO2The additive amounts of the aerogel powder, the emulsifier, the dispersant, the surfactant, the defoamer, the film forming additive, the flame retardant, the pigment filler, the thickener and the water are as follows by mass ratio: 200-450: 8-20: 0.5-1: 0.1-1: 0.2-2: 0.1-1: 1-3: 3-5: 5-8: 1-3: 100-200.
A preparation method of aerogel thermal insulation water-based paint comprises the following steps:
(1) mixing emulsifier and dispersant uniformly, adding water and SiO2Slowly adding surfactant into aerogel powder under stirring, and continuously stirring to obtain SiO2An aerogel slurry; wherein, SiO2The aerogel powder is hydrophobic SiO2The particle size of the aerogel powder is 1-50 microns, wherein the hydrophobic SiO2 aerogel powder is prepared by mixing the raw materials; the emulsifier is one or more of tween 60, span 60 and high molecular weight polyethylene glycol, and the molecular weight of the high molecular weight polyethylene glycol is more than or equal to 2000; the dispersant is a sodium polycarboxylate dispersant, the surfactant is an amino functional group silane coupling agent, and the water is deionized water or tap water; the stirring speed is 300r/min to 750r/min, and the continuous stirring time is 5min to 30min after the surfactant is added;
(2) SiO in the step (1)2Mixing the aerogel slurry with the water-based polyacrylic acid emulsion, and continuously stirring to obtain polyacrylic acid-aerogel mixed liquid; the stirring speed is 600 r/min-1200 r/min, and the continuous stirring time is 30 min-90 min;
(3) sequentially adding a defoaming agent, a film-forming assistant and a flame retardant into the polyacrylic acid-aerogel mixed liquid obtained in the step (2), and then continuously stirring to obtain an aerogel heat-insulation water-based coating intermediate; wherein the defoaming agent is a mineral oil defoaming agent, the film-forming assistant is alcohol ester 12, and the flame retardant is ammonium polyphosphate; the stirring speed is 700 r/min-1500 r/min, and the continuous stirring time is 90 min-150 min;
(4) adding the aerogel heat-insulation water-based paint intermediate in the step (3) together with the pigment filler and the thickening agent into a high-speed grinding machine for high-speed stirring and grinding to obtain the aerogel heat-insulation water-based paintFeeding; wherein the pigment and filler is rutile type TiO2Rutile type TiO2The particle size of (A) is 200-300 μm; the thickener is one or more of cellulose thickener and inorganic salt thickener; the high-speed stirring and grinding speed is 2000r/min to 3500r/min, and the high-speed stirring and grinding time is 120min to 180 min;
wherein, the water-based polyacrylic acid emulsion and the SiO2The additive amounts of the aerogel powder, the emulsifier, the dispersant, the surfactant, the defoamer, the film forming additive, the flame retardant, the pigment filler, the thickener and the water are as follows by mass ratio: 200-450: 8-20: 0.5-1: 0.1-1: 0.2-2: 0.1-1: 1-3: 3-5: 5-8: 1-3: 100-200.
The application of the aerogel thermal insulation water-based paint on a metal substrate comprises but is not limited to stainless steel, aluminum alloy and iron. Various construction modes including brushing, roller coating and spraying can be adopted.
The following examples relate to hydrophobic SiO2The aerogel powder was prepared from hydrophobic SiO of Korea jios aerogel2Aerogel powder (particle size is less than or equal to 5 μm), tween 60 is tween 60 of Guangdong Huana chemical industry Co., Ltd, span 60 is span 60 of Guangdong Huana chemical industry Co., Ltd, SN-5040 is SN-DISPERSANT 5040 of Santa Nursery Co., Ltd, KH-550 is KH-550 of Hangzhou Jessica chemical industry Co., Ltd, aqueous polyacrylic emulsion is E0504 of Jitian chemical industry Co., Ltd, defoamer NXZ is NOPCO NXZ of Santa Nursery Co., Ltd, alcohol ester-12 is alcohol ester-12 of Jitian chemical industry Co., Ltd, ammonium polyphosphate is CS APP FR 121H of Shandong Sheng flame retardant New Material Co., Ltd, rutile type TiO 72R818 of Jinming chemical industry Limited in Jinan, hydroxyethyl cellulose of Jitian chemical industry Limited in Shenzhen and HT-F of Shandong Weifang Strength composite material Limited in Shandong are adopted as the hydroxyethyl cellulose.
The heat insulation performance of a workpiece sprayed with the coating in the following examples is tested according to JG/T235-2008 building reflective heat insulation coating, the bending strength is tested according to GB/T11185-2009 paint and varnish bending test (conical shaft), the adhesion is tested according to GB/T9286-1998 grid test for paint films of paint and varnish, the water resistance is tested according to GB 5209-1985-method for measuring water resistance of paint and varnish, the stain resistance is tested according to GB/T9780-2013-method for testing stain resistance of a building coating, the acid and alkali resistance is tested according to GB/T14907-2018-steel structure fire-proof coating, and the performance is tested according to GB/T9266-2009-method for measuring washing resistance of a building coating. The coatings prepared in the following examples were tested for low temperature storage according to GB/T9779-2015 Multi-layer building coatings.
Example 1
(1) 0.5g of Tween 60 and 0.1g of SN-5040 are mixed uniformly, and 125g of deionized water and 10g of hydrophobic SiO2Stirring the aerogel powder at 350r/min, slowly adding 0.2g KH-550 (about 30 s), and continuously stirring for 10min to obtain SiO2An aerogel slurry;
(2) taking 320g of water-based polyacrylic acid emulsion and SiO obtained in step (1)2Mixing the aerogel slurry, and continuously stirring for 30min under the condition of 750r/min to obtain polyacrylic acid-aerogel mixed liquid;
(3) sequentially adding 0.1g of defoaming agent NXZ, 2g of alcohol ester-12 and 3g of ammonium polyphosphate into the polyacrylic acid-aerogel mixed liquid obtained in the step (2), and continuously stirring for 90min under the condition of 900r/min to obtain an aerogel heat-insulation water-based coating intermediate;
(4) mixing the aerogel thermal insulation coating intermediate obtained in the step (3) with 8g rutile TiO2Adding the mixture and 2g of hydroxyethyl cellulose into a high-speed grinding machine, and carrying out continuous stirring and grinding for 150min under the condition of 2000r/min to obtain the aerogel thermal insulation water-based coating.
The aerogel thermal insulation water-based paint prepared in the embodiment was sprayed on SUS304 to a thickness of 3.5 mm. The heat-insulating property of the coating reaches 20 ℃/mm, the bending strength is 0mm, the adhesive force is 0 grade, and the coating is respectively coated on tap water, dye, 0.3mol/l HCl and 0.3mol/l NH3·H2No occurrence of any disease film and surface pollution after soaking in O for 14 days, and 2500 timesThe surface did not show any scratches after the scrub test. The measured water contact angle is 125 degrees, which shows that the coating has hydrophobicity, and shows that the prepared coating has hydrophobic self-cleaning performance and anti-condensation performance. In addition, the water-based paint prepared in this example was not deteriorated when stored at low temperature (-5 ℃ C.) for 30 days.
Example 2
(1) 1g of span 60 and 0.5g of SN-5040 are mixed evenly and then 200g of tap water and 20g of hydrophobic SiO2Stirring the aerogel powder at the rotating speed of 600r/min, slowly adding 2gKH-550 (about 90 s), and continuously stirring for 5min to obtain SiO2An aerogel slurry;
(2) taking 320g of water-based polyacrylic acid emulsion and SiO obtained in step (1)2Mixing the aerogel slurry, and continuously stirring for 45min under the condition of 1000r/min to obtain polyacrylic acid-aerogel mixed liquid;
(3) sequentially adding 0.5g of defoaming agent NXZ, 1g of alcohol ester-12 and 5g of ammonium polyphosphate into the polyacrylic acid-aerogel mixed liquid obtained in the step (2), and continuously stirring for 120min under the condition of 700r/min to obtain an aerogel heat-preservation and heat-insulation water-based coating intermediate;
(4) mixing the aerogel heat-preservation and heat-insulation water-based paint intermediate obtained in the step (3) with 5g of rutile TiO2Adding the mixture and 3g of hydroxypropyl methyl cellulose into a high-speed grinding machine, and continuously stirring and grinding for 120min under the condition of 3000r/min to obtain the aerogel thermal insulation water-based coating.
The aerogel thermal insulation water-based paint prepared in the embodiment was sprayed on SUS 316 to a thickness of 3.5 mm. The heat-insulating property of the coating reaches 35 ℃/mm, the bending strength is 0mm, the adhesive force is 0 grade, and the coating is respectively coated on tap water, dye, 0.3mol/l HCl and 0.3mol/l NH3·H2No film and surface pollution phenomenon appears after the O-bath for 14 days, and no scratch appears on the surface after 2500 times of washing tests. The measured water contact angle is 130 degrees, which shows that the coating has hydrophobicity, and shows that the prepared coating has hydrophobic self-cleaning performance and anti-condensation performance. In addition, the water-based paint prepared in the embodiment is used for preparing low-temperature stripsThe product can be stored at (-5 deg.C) for 30 days without deterioration.
Claims (10)
1. The aerogel thermal insulation water-based paint is characterized by being prepared by the following steps:
(1) mixing emulsifier and dispersant uniformly, adding water and SiO2Slowly adding surfactant into aerogel powder under stirring, and continuously stirring to obtain SiO2An aerogel slurry; wherein, SiO2The aerogel powder is hydrophobic SiO2The aerogel powder is prepared by mixing an aerogel powder, an emulsifier, a dispersant and a surfactant, wherein the emulsifier is one or more of tween 60, span 60 and high molecular weight polyethylene glycol, the dispersant is a sodium polycarboxylate dispersant, and the surfactant is an amino functional group silane coupling agent;
(2) SiO in the step (1)2Mixing the aerogel slurry with the water-based polyacrylic acid emulsion, and continuously stirring to obtain polyacrylic acid-aerogel mixed liquid;
(3) sequentially adding a defoaming agent, a film-forming assistant and a flame retardant into the polyacrylic acid-aerogel mixed liquid obtained in the step (2), and then continuously stirring to obtain an aerogel heat-insulation water-based coating intermediate; wherein the defoaming agent is a mineral oil defoaming agent, the film-forming assistant is alcohol ester 12, and the flame retardant is ammonium polyphosphate;
(4) adding the aerogel heat-insulation water-based paint intermediate in the step (3) together with a pigment filler and a thickening agent into a high-speed grinding machine for high-speed stirring and grinding to obtain the aerogel heat-insulation water-based paint; wherein the pigment and filler is rutile type TiO2The thickening agent is one or more of cellulose thickening agent and inorganic salt thickening agent;
wherein, the water-based polyacrylic acid emulsion and the SiO2The additive amounts of the aerogel powder, the emulsifier, the dispersant, the surfactant, the defoamer, the film forming additive, the flame retardant, the pigment filler, the thickener and the water are as follows by mass ratio: 200-450: 8-20: 0.5-1: 0.1-1: 0.2-2: 0.1-1: 1-3: 3-5: 5-8: 1-3: 100-200.
2. The aerogel heat-preservation and heat-insulation water-based paint as claimed in claim 1, wherein the stirring speed in the step (1) is 300r/min to 750r/min, and the stirring time is 5min to 30min after the surfactant is added; in the step (2), the stirring speed is 600 r/min-1200 r/min, and the continuous stirring time is 30 min-90 min; in the step (3), the stirring speed is 700 r/min-1500 r/min, and the continuous stirring time is 90 min-150 min; the high-speed stirring and grinding in the step (4) has the rotating speed of 2000 r/min-3500 r/min and the high-speed stirring and grinding time of 120 min-180 min.
3. The aerogel thermal insulation water-based paint as claimed in claim 1, wherein the water in the step (1) is deionized water or tap water; the molecular weight of the high molecular weight polyethylene glycol is more than or equal to 2000.
4. The aerogel thermal insulation water-based paint as claimed in claim 1, wherein the particle size of the hydrophobic SiO2 aerogel powder in step (1) is 1-50 μm; rutile type TiO in step (4)2The particle size of (B) is 200 to 300 μm.
5. The preparation method of the aerogel thermal insulation water-based paint is characterized by comprising the following steps:
(1) mixing emulsifier and dispersant uniformly, adding water and SiO2Slowly adding surfactant into aerogel powder under stirring, and continuously stirring to obtain SiO2An aerogel slurry; wherein, SiO2The aerogel powder is hydrophobic SiO2The aerogel powder is prepared by mixing an aerogel powder, an emulsifier, a dispersant and a surfactant, wherein the emulsifier is one or more of tween 60, span 60 and high molecular weight polyethylene glycol, the dispersant is a sodium polycarboxylate dispersant, and the surfactant is an amino functional group silane coupling agent;
(2) SiO in the step (1)2Mixing the aerogel slurry with the water-based polyacrylic acid emulsion, and continuously stirring to obtain polyacrylic acid-aerogel mixed liquid;
(3) sequentially adding a defoaming agent, a film-forming assistant and a flame retardant into the polyacrylic acid-aerogel mixed liquid obtained in the step (2), and then continuously stirring to obtain an aerogel heat-insulation water-based coating intermediate; wherein the defoaming agent is a mineral oil defoaming agent, the film-forming assistant is alcohol ester 12, and the flame retardant is ammonium polyphosphate;
(4) adding the aerogel heat-insulation water-based paint intermediate in the step (3) together with a pigment filler and a thickening agent into a high-speed grinding machine for high-speed stirring and grinding to obtain the aerogel heat-insulation water-based paint; wherein the pigment and filler is rutile type TiO2The thickening agent is one or more of cellulose thickening agent and inorganic salt thickening agent;
wherein, the water-based polyacrylic acid emulsion and the SiO2The additive amounts of the aerogel powder, the emulsifier, the dispersant, the surfactant, the defoamer, the film forming additive, the flame retardant, the pigment filler, the thickener and the water are as follows by mass ratio: 200-450: 8-20: 0.5-1: 0.1-1: 0.2-2: 0.1-1: 1-3: 3-5: 5-8: 1-3: 100-200.
6. The preparation method of the aerogel thermal insulation water-based paint as claimed in claim 5, wherein the stirring speed in the step (1) is 300r/min to 750r/min, and the stirring time is 5min to 30min after the surfactant is added; in the step (2), the stirring speed is 600 r/min-1200 r/min, and the continuous stirring time is 30 min-90 min; in the step (3), the stirring speed is 700 r/min-1500 r/min, and the continuous stirring time is 90 min-150 min; the high-speed stirring and grinding in the step (4) has the rotating speed of 2000 r/min-3500 r/min and the high-speed stirring and grinding time of 120 min-180 min.
7. The preparation method of the aerogel thermal insulation water-based paint according to claim 5, wherein the water in the step (1) is deionized water or tap water; the molecular weight of the high molecular weight polyethylene glycol is more than or equal to 2000.
8. The preparation method of the aerogel thermal insulation water-based paint as claimed in claim 5, wherein the particle size of the hydrophobic SiO2 aerogel powder in the step (1) is 1-50 μm; rutile type TiO in step (4)2The particle size of (B) is 200 to 300 μm.
9. Use of the aerogel thermal insulation water-based coating according to any of claims 1 to 4 on a metal substrate.
10. Use according to claim 9, wherein the metal substrate comprises stainless steel, an aluminium alloy or iron.
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