CN110105871B - Preparation method of super-hydrophobic photo-thermal ice-suppressing coating by taking iron-copper-manganese metal salt and nano silicon dioxide as raw materials - Google Patents
Preparation method of super-hydrophobic photo-thermal ice-suppressing coating by taking iron-copper-manganese metal salt and nano silicon dioxide as raw materials Download PDFInfo
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- 238000000576 coating method Methods 0.000 title claims abstract description 108
- 239000011248 coating agent Substances 0.000 title claims abstract description 92
- 230000003075 superhydrophobic effect Effects 0.000 title claims abstract description 62
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 19
- 239000002184 metal Substances 0.000 title claims abstract description 19
- 239000002994 raw material Substances 0.000 title claims abstract description 19
- 150000003839 salts Chemical class 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- BQCFCWXSRCETDO-UHFFFAOYSA-N [Fe].[Mn].[Cu] Chemical compound [Fe].[Mn].[Cu] BQCFCWXSRCETDO-UHFFFAOYSA-N 0.000 title claims abstract description 15
- 235000012239 silicon dioxide Nutrition 0.000 title claims abstract description 14
- 239000005543 nano-size silicon particle Substances 0.000 title claims abstract description 10
- 239000002105 nanoparticle Substances 0.000 claims abstract description 85
- 238000005507 spraying Methods 0.000 claims abstract description 58
- 239000000758 substrate Substances 0.000 claims abstract description 44
- 239000000843 powder Substances 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000000243 solution Substances 0.000 claims description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 53
- -1 iron ions Chemical class 0.000 claims description 35
- 239000000377 silicon dioxide Substances 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 27
- 229910052681 coesite Inorganic materials 0.000 claims description 25
- 229910052906 cristobalite Inorganic materials 0.000 claims description 25
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 25
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 25
- 229910052682 stishovite Inorganic materials 0.000 claims description 25
- 229910052905 tridymite Inorganic materials 0.000 claims description 25
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- SZQUEWJRBJDHSM-UHFFFAOYSA-N iron(3+);trinitrate;nonahydrate Chemical compound O.O.O.O.O.O.O.O.O.[Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O SZQUEWJRBJDHSM-UHFFFAOYSA-N 0.000 claims description 19
- 239000007921 spray Substances 0.000 claims description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 16
- 238000003756 stirring Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 13
- 229960000583 acetic acid Drugs 0.000 claims description 12
- 239000012362 glacial acetic acid Substances 0.000 claims description 12
- RSKGMYDENCAJEN-UHFFFAOYSA-N hexadecyl(trimethoxy)silane Chemical compound CCCCCCCCCCCCCCCC[Si](OC)(OC)OC RSKGMYDENCAJEN-UHFFFAOYSA-N 0.000 claims description 12
- 239000011259 mixed solution Substances 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 230000001629 suppression Effects 0.000 claims description 11
- SXTLQDJHRPXDSB-UHFFFAOYSA-N copper;dinitrate;trihydrate Chemical compound O.O.O.[Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O SXTLQDJHRPXDSB-UHFFFAOYSA-N 0.000 claims description 9
- 238000000227 grinding Methods 0.000 claims description 9
- CNFDGXZLMLFIJV-UHFFFAOYSA-L manganese(II) chloride tetrahydrate Chemical compound O.O.O.O.[Cl-].[Cl-].[Mn+2] CNFDGXZLMLFIJV-UHFFFAOYSA-L 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 239000002244 precipitate Substances 0.000 claims description 9
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 6
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 claims description 5
- 229910001431 copper ion Inorganic materials 0.000 claims description 5
- 229910001437 manganese ion Inorganic materials 0.000 claims description 5
- 150000001450 anions Chemical class 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 238000000967 suction filtration Methods 0.000 claims description 4
- 239000006228 supernatant Substances 0.000 claims description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical class [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical class [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims 3
- 229910052802 copper Inorganic materials 0.000 claims 3
- 239000010949 copper Chemical class 0.000 claims 3
- 229910052748 manganese Chemical class 0.000 claims 3
- 239000011572 manganese Chemical class 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 16
- 238000007710 freezing Methods 0.000 abstract description 11
- 230000008014 freezing Effects 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 8
- 229910052724 xenon Inorganic materials 0.000 description 23
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 23
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- 238000009776 industrial production Methods 0.000 description 4
- 239000000523 sample Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
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- 230000007613 environmental effect Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000012994 industrial processing Methods 0.000 description 2
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- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
- B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
-
- 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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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- 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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2518/00—Other type of polymers
- B05D2518/10—Silicon-containing polymers
- B05D2518/12—Ceramic precursors (polysiloxanes, polysilazanes)
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention discloses a preparation method of a super-hydrophobic photo-thermal ice-suppressing coating by taking iron-copper-manganese metal salt and nano silicon dioxide as raw materials, and relates to a preparation method of a super-hydrophobic photo-thermal ice-suppressing coating. The problem of current material effect of suppressing ice single, can't reach simultaneously and prevent to freeze and can high-efficient deicing after freezing is solved. The preparation method comprises the following steps: firstly, preparing solar photo-thermal powder; secondly, preparing a nano particle solution; thirdly, preparing a solar thermal substrate; and fourthly, spraying to obtain the super-hydrophobic photo-thermal ice-suppression coating. The method is used for preparing the super-hydrophobic photo-thermal ice-suppressing coating.
Description
Technical Field
The invention relates to a preparation method of a super-hydrophobic photo-thermal ice-suppressing coating.
Background
With the deterioration of global climate and the destruction of environment, the natural phenomenon of icing gradually becomes a problem in some fields of human society, and the formation of ice and snow often has great influence on transportation industry, transmission lines, airplanes, buildings, public facilities and the like. Therefore, research and development of a new deicing and anti-icing system are of great significance for avoiding damage to human society caused by ice and snow disasters. The materials involved in ice inhibition are mainly divided into active deicing materials and passive deicing materials, each material has a single effect, and the technical effects of icing prevention and efficient deicing after icing cannot be achieved simultaneously.
Disclosure of Invention
The invention provides a preparation method of a super-hydrophobic photo-thermal ice-suppressing coating by using iron-copper-manganese metal salt and nano silicon dioxide as raw materials, aiming at solving the problems that the existing ice-suppressing material has single effect and can not simultaneously achieve the purposes of preventing icing and efficiently removing ice after icing.
A preparation method of a super-hydrophobic photo-thermal ice-suppressing coating by taking iron-copper-manganese metal salt and nano silicon dioxide as raw materials comprises the following steps:
firstly, preparing solar photo-thermal powder:
mixing ferric nitrate nonahydrate, copper nitrate trihydrate, manganese chloride tetrahydrate and water to obtain a mixed solution, then simultaneously dripping 3-8% of sodium hydroxide solution and the mixed solution into a container and stirring to obtain a mixture, controlling the dripping speed in the dripping process to keep the pH of the mixture to be 10.5-11.5, standing the mixture at room temperature for 1-4 h, removing supernatant and carrying out suction filtration to obtain a precipitate, drying the precipitate for 1-3 h at the temperature of 50-120 ℃, grinding, finally heating to 600-800 ℃ at the heating speed of 5-20 ℃/min, and calcining for 1-2 h at the temperature of 600-800 ℃ in an air atmosphere to obtain solar photothermal powder;
the volume ratio of the ferric nitrate nonahydrate to the water is 1g (10-20) mL; the molar ratio of iron ions in the ferric nitrate nonahydrate to copper ions in the cupric nitrate trihydrate is 1 (0.9-2); the molar ratio of iron ions in the ferric nitrate nonahydrate to manganese ions in the manganese chloride tetrahydrate is 1 (0.9-2); the mole number of hydroxide radicals in the sodium hydroxide solution with the mass percentage of 3-8% is the same as that of anions in the mixed solution;
secondly, preparing a nano particle solution:
SiO in gas phase2The nano particles are added into cyclohexane to obtain gas phase SiO2Nanoparticle solution of SiO in gas phase2The nano particle solution is dispersed for 5min to 30min by ultrasonic to obtain uniform SiO2Suspending, dropwise adding hexadecyl trimethoxy silane and glacial acetic acid into uniform SiO under stirring at room temperature2Stirring the suspension for 1 to 2 days to obtain a nano-particle solution;
the gas phase SiO2The concentration of the nano-particle solution is 5 mg/mL-25 mg/mL; the gas phase SiO2The mass ratio of the nano particles to the hexadecyl trimethoxy silane is 1 (2-4); the gas phase SiO2The mass ratio of the nano particles to the glacial acetic acid is 1 (0.5-1);
thirdly, preparing a solar thermal matrix:
mixing solar photo-thermal powder, polydimethylsiloxane and a polydimethylsiloxane curing agent, then grinding for 1-3 h in a ball mill to obtain a coating, and coating the coating on a substrate under the condition that the coating thickness is 100-600 mu m to obtain a solar thermal substrate;
the mass ratio of the solar photo-thermal powder to the polydimethylsiloxane is 1 (5-15);
fourthly, spraying:
firstly, taking a nano-particle solution as a spraying liquid, spraying 15 to 50 layers of nano-particle coatings on the upper surface of a solar thermal substrate under the conditions that the air pressure of a spray gun is 0.4 to 0.7MPa and the distance is 15 to 20cm, and then heating for 10 to 20min at the temperature of between 100 and 135 ℃ to obtain a substrate after primary spraying;
secondly, taking the nano-particle solution as a spraying liquid, continuously spraying 15 to 50 layers of nano-particle coatings on the upper surface of the substrate after the first spraying under the conditions that the air pressure of a spray gun is 0.4 to 0.7MPa and the distance is 15 to 20cm, and then heating for 20 to 30min at the temperature of between 100 and 135 ℃ to obtain the substrate after the second spraying;
thirdly, taking the nano-particle solution as a spraying liquid, continuously spraying 15 to 50 layers of nano-particle coatings on the upper surface of the substrate after the second spraying under the conditions that the air pressure of a spray gun is 0.4 to 0.7MPa and the distance is 15 to 20cm, and then heating for 30 to 50 minutes at the temperature of between 100 and 135 ℃ to obtain the substrate after the third spraying;
and fourthly, taking the nano-particle solution as a spraying liquid, continuously spraying 15 to 50 layers of nano-particle coatings on the upper surface of the substrate after the third spraying under the conditions that the air pressure of a spray gun is 0.4 to 0.7MPa and the distance is 15 to 20cm, and then curing for 1 to 3 hours at the temperature of between 100 and 135 ℃ to obtain the super-hydrophobic photo-thermal ice suppression coating.
The principle is as follows: a single super-hydrophobic surface cannot achieve an excellent super-hydrophobic effect under the conditions of high humidity and low temperature, but the method for improving the temperature of the modified surface by utilizing solar energy is a method for effectively improving the ice suppression performance. Firstly, the prepared nanoparticle solution is transplanted on a solar thermal substrate, so that the photo-thermal substrate achieves a super-hydrophobic effect and is endowed with passive anti-icing performance. Meanwhile, under the irradiation of sunlight (or simulated sunlight), the surface temperature is raised by utilizing the photo-thermal conversion effect, and the coating is endowed with the active deicing performance through thermal compensation, so that a good ice inhibition effect is achieved.
The invention has the beneficial effects that:
the super-hydrophobic photo-thermal ice-suppressing coating prepared by using the iron-copper-manganese metal salt and the silicon dioxide as raw materials has the characteristics of low economic cost, simple preparation process, short production period, good photo-thermal effect and the like, and is a novel ice-suppressing material.
1. The metal salt and the silicon dioxide are used as raw materials, and the method has the characteristics of abundant reserves, low price, easy obtainment, environmental friendliness, easy recovery and the like.
2. The contact angle of the photo-thermal super-hydrophobic composite coating prepared by the invention and water is 157 degrees, and the rolling angle is 2 degrees; at the low temperature of-15 ℃ and a certain power xenon lamp (400 mW/cm)2) Under irradiation, the coating shows excellent super-hydrophobicity, the temperature rise amplitude reaches more than 40 ℃, and the stability is kept, so that the ice inhibition effect is achieved; at room temperature, the utilization power is 2000mW/cm2The xenon lamp irradiates the super-hydrophobic photo-thermal ice-suppressing coating which is 10cm away from the xenon lamp, and the temperature can be raised to 185 ℃ within 180s, so that the xenon lamp has a good temperature raising effect; in a 25-minute simulated freezing rain experiment, the prepared super-hydrophobic photo-thermal ice-suppressing coating has no ice crystal on the surface, and can achieve a complete ice-suppressing effect under the irradiation of a xenon lamp; the adhesion of the coating to ice under xenon lamp irradiation was as low as 2.1 KPa.
3. The photo-thermal super-hydrophobic composite coating prepared by the invention can be widely applied to the aspects of building appearance, industrial production ice prevention, pipeline ice inhibition and the like.
4. The method has the advantages of high feasibility, simple operation process, less capital investment, short preparation period, mild reaction conditions, no need of large-scale instruments and equipment, large-scale industrial production and processing, wide application prospect and capability of being used as an ice inhibition coating for buildings or certain specific surfaces.
The invention provides a preparation method of a super-hydrophobic photo-thermal ice-suppressing coating by taking iron-copper-manganese metal salt and nano silicon dioxide as raw materials.
Drawings
FIG. 1 is a photograph of a super-hydrophobic photo-thermal ice-suppressing coating prepared in the first example;
FIG. 2 is an electron micrograph of the superhydrophobic photo-thermal ice-suppressing coating prepared in the first example at magnification of 50000 times;
FIG. 3 is an electron micrograph of the superhydrophobic photo-thermal ice-suppressing coating prepared in the first example at a magnification of 100000 times;
FIG. 4 is an electron micrograph of a solar photothermal powder prepared according to one step one of the examples at 60000 times magnification;
FIG. 5 is an electron micrograph of a solar photothermal powder prepared according to step one of the examples at 80000 times magnification;
FIG. 6 is an X-ray diffraction pattern of a solar photo-thermal powder prepared in step one of the examples;
FIG. 7 is a photograph showing the contact angle of the superhydrophobic photo-thermal ice-suppressing coating with water prepared in the first example;
FIG. 8 is a temperature rise curve of the super-hydrophobic photothermal ice-suppressing coating prepared in the first example under xenon lamp irradiation;
FIG. 9 is a graph of icing for a simulated freezing rain experiment of aluminum panels at low temperature for 25 minutes;
FIG. 10 is a graph of icing conditions of a simulated freezing rain experiment of the superhydrophobic photothermal ice suppression coating prepared in the first example for 25 minutes at a low temperature.
Detailed Description
The first embodiment is as follows: the embodiment of the invention relates to a preparation method of a super-hydrophobic photo-thermal ice-suppressing coating by taking iron-copper-manganese metal salt and nano silicon dioxide as raw materials, which is carried out according to the following steps:
firstly, preparing solar photo-thermal powder:
mixing ferric nitrate nonahydrate, copper nitrate trihydrate, manganese chloride tetrahydrate and water to obtain a mixed solution, then simultaneously dripping 3-8% of sodium hydroxide solution and the mixed solution into a container and stirring to obtain a mixture, controlling the dripping speed in the dripping process to keep the pH of the mixture to be 10.5-11.5, standing the mixture at room temperature for 1-4 h, removing supernatant and carrying out suction filtration to obtain a precipitate, drying the precipitate for 1-3 h at the temperature of 50-120 ℃, grinding, finally heating to 600-800 ℃ at the heating speed of 5-20 ℃/min, and calcining for 1-2 h at the temperature of 600-800 ℃ in an air atmosphere to obtain solar photothermal powder;
the volume ratio of the ferric nitrate nonahydrate to the water is 1g (10-20) mL; the molar ratio of iron ions in the ferric nitrate nonahydrate to copper ions in the cupric nitrate trihydrate is 1 (0.9-2); the molar ratio of iron ions in the ferric nitrate nonahydrate to manganese ions in the manganese chloride tetrahydrate is 1 (0.9-2); the mole number of hydroxide radicals in the sodium hydroxide solution with the mass percentage of 3-8% is the same as that of anions in the mixed solution;
secondly, preparing a nano particle solution:
SiO in gas phase2The nano particles are added into cyclohexane to obtain gas phase SiO2Nanoparticle solution of SiO in gas phase2The nano particle solution is dispersed for 5min to 30min by ultrasonic to obtain uniform SiO2Suspending, dropwise adding hexadecyl trimethoxy silane and glacial acetic acid into uniform SiO under stirring at room temperature2Stirring the suspension for 1 to 2 days to obtain a nano-particle solution;
the gas phase SiO2The concentration of the nano-particle solution is 5 mg/mL-25 mg/mL; the gas phase SiO2The mass ratio of the nano particles to the hexadecyl trimethoxy silane is 1 (2-4); the gas phase SiO2The mass ratio of the nano particles to the glacial acetic acid is 1 (0.5-1);
thirdly, preparing a solar thermal matrix:
mixing solar photo-thermal powder, polydimethylsiloxane and a polydimethylsiloxane curing agent, then grinding for 1-3 h in a ball mill to obtain a coating, and coating the coating on a substrate under the condition that the coating thickness is 100-600 mu m to obtain a solar thermal substrate;
the mass ratio of the solar photo-thermal powder to the polydimethylsiloxane is 1 (5-15);
fourthly, spraying:
firstly, taking a nano-particle solution as a spraying liquid, spraying 15 to 50 layers of nano-particle coatings on the upper surface of a solar thermal substrate under the conditions that the air pressure of a spray gun is 0.4 to 0.7MPa and the distance is 15 to 20cm, and then heating for 10 to 20min at the temperature of between 100 and 135 ℃ to obtain a substrate after primary spraying;
secondly, taking the nano-particle solution as a spraying liquid, continuously spraying 15 to 50 layers of nano-particle coatings on the upper surface of the substrate after the first spraying under the conditions that the air pressure of a spray gun is 0.4 to 0.7MPa and the distance is 15 to 20cm, and then heating for 20 to 30min at the temperature of between 100 and 135 ℃ to obtain the substrate after the second spraying;
thirdly, taking the nano-particle solution as a spraying liquid, continuously spraying 15 to 50 layers of nano-particle coatings on the upper surface of the substrate after the second spraying under the conditions that the air pressure of a spray gun is 0.4 to 0.7MPa and the distance is 15 to 20cm, and then heating for 30 to 50 minutes at the temperature of between 100 and 135 ℃ to obtain the substrate after the third spraying;
and fourthly, taking the nano-particle solution as a spraying liquid, continuously spraying 15 to 50 layers of nano-particle coatings on the upper surface of the substrate after the third spraying under the conditions that the air pressure of a spray gun is 0.4 to 0.7MPa and the distance is 15 to 20cm, and then curing for 1 to 3 hours at the temperature of between 100 and 135 ℃ to obtain the super-hydrophobic photo-thermal ice suppression coating.
The beneficial effects of the embodiment are as follows:
the super-hydrophobic photo-thermal ice-suppressing coating prepared by using the iron-copper-manganese metal salt and the silicon dioxide as raw materials has the characteristics of low economic cost, simple preparation process, short production period, good photo-thermal effect and the like, and is a novel ice-suppressing material.
1. The metal salt and the silicon dioxide are used as raw materials, and the method has the characteristics of abundant reserves, low price, easy obtainment, environmental friendliness, easy recovery and the like.
2. The photo-thermal super-hydrophobic composite coating prepared by the specific embodiment has a contact angle of 157 degrees with water and a rolling angle of 2 degrees; at the low temperature of-15 ℃ and a certain power xenon lamp (400 mW/cm)2) Under irradiation, the coating shows excellent super-hydrophobicity, the temperature rise amplitude reaches more than 40 ℃, and the coating is kept stable, thereby achieving the aim ofThe ice inhibition effect; at room temperature, the utilization power is 2000mW/cm2The xenon lamp irradiates the super-hydrophobic photo-thermal ice-suppressing coating which is 10cm away from the xenon lamp, and the temperature can be raised to 185 ℃ within 180s, so that the xenon lamp has a good temperature raising effect; in a 25-minute simulated freezing rain experiment, the prepared super-hydrophobic photo-thermal ice-suppressing coating has no ice crystal on the surface, and can achieve a complete ice-suppressing effect under the irradiation of a xenon lamp; the adhesion of the coating to ice under xenon lamp irradiation was as low as 2.1 KPa.
3. The photo-thermal super-hydrophobic composite coating prepared by the specific embodiment can be widely applied to the aspects of building appearance, industrial production ice prevention, pipeline ice inhibition and the like.
4. The method has the advantages of high feasibility, simple operation process, low capital investment, short preparation period, mild reaction conditions, no need of large-scale instruments and equipment, large-scale industrial production and processing, wide application prospect and capability of being used as an ice inhibition coating for buildings or certain specific surfaces.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: gas phase SiO described in step two2The average particle diameter of the nano-particles is 200 nm-300 nm. The rest is the same as the first embodiment.
The third concrete implementation mode: this embodiment is different from the first or second embodiment in that: the mass ratio of the polydimethylsiloxane to the polydimethylsiloxane curing agent in the third step is 10: 1. The other is the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment mode and one of the first to third embodiment modes is: in the first step, the precipitate is dried for 1.5 to 3 hours at the temperature of 80 to 120 ℃, then ground, finally heated to 700 to 800 ℃ at the heating rate of 10 to 20 ℃/min, and calcined for 1 to 2 hours at the temperature of 700 to 800 ℃ in the air atmosphere to obtain the solar photo-thermal powder. The others are the same as the first to third embodiments.
The fifth concrete implementation mode: the difference between this embodiment and one of the first to fourth embodiments is: the volume ratio of the mass of the ferric nitrate nonahydrate to the volume of water in the step one is 1g (16-20) mL; the molar ratio of iron ions in the ferric nitrate nonahydrate to copper ions in the cupric nitrate trihydrate in the first step is 1 (1-2); the molar ratio of iron ions in the ferric nitrate nonahydrate to manganese ions in the manganese chloride tetrahydrate in the step one is 1 (1-2). The rest is the same as the first to fourth embodiments.
The sixth specific implementation mode: the difference between this embodiment and one of the first to fifth embodiments is: gas phase SiO described in step two2The concentration of the nano-particle solution is 7 mg/mL-25 mg/mL; gas phase SiO described in step two2The mass ratio of the nano particles to the hexadecyl trimethoxy silane is 1 (2-3.5); gas phase SiO described in step two2The mass ratio of the nano particles to the glacial acetic acid is 1 (0.6-1). The rest is the same as in the first or fifth embodiment.
The seventh embodiment: the difference between this embodiment and one of the first to sixth embodiments is: and in the third step, mixing the solar photo-thermal powder, the polydimethylsiloxane and the curing agent of the polydimethylsiloxane, then grinding for 1-2 h in a ball mill to obtain a coating, and coating the coating on a substrate under the condition that the coating thickness is 200-600 microns to obtain the solar thermal matrix. The others are the same as the first to sixth embodiments.
The specific implementation mode is eight: the present embodiment differs from one of the first to seventh embodiments in that: the mass ratio of the solar photo-thermal powder to the polydimethylsiloxane in the third step is 1 (9-15). The rest is the same as the first to seventh embodiments.
The specific implementation method nine: the present embodiment differs from the first to eighth embodiments in that: in the second step, SiO in gas phase2The nano particles are added into cyclohexane to obtain gas phase SiO2Nanoparticle solution of SiO in gas phase2The nano particle solution is dispersed for 5min to 20min by ultrasonic to obtain uniform SiO2Suspending, dropwise adding hexadecyl trimethoxy silane and glacial acetic acid into uniform SiO under stirring at room temperature2And stirring the suspension for 1 to 1.5 days to obtain a nano-particle solution. Other and detailed description of the inventionOne to eight are the same.
The detailed implementation mode is ten: the present embodiment differs from one of the first to ninth embodiments in that: heating for 10min in the step IV; heating for 20min in the fourth step; heating for 30min in the step four; and fourthly, curing for 1.5 h. The other points are the same as those in the first to ninth embodiments.
The following examples were used to demonstrate the beneficial effects of the present invention:
the first embodiment is as follows:
a preparation method of a super-hydrophobic photo-thermal ice-suppressing coating taking iron-copper-manganese metal salt and nano silicon dioxide as raw materials is carried out according to the following steps:
firstly, preparing solar photo-thermal powder:
mixing ferric nitrate nonahydrate, copper nitrate trihydrate, manganese chloride tetrahydrate and water to obtain a mixed solution, then simultaneously dripping a sodium hydroxide solution with the mass percentage of 4.2% and the mixed solution into a container and stirring to obtain a mixture, controlling the dripping speed in the dripping process to keep the pH of the mixture at 11, then standing the mixture at room temperature for 3 hours, removing a supernatant and carrying out suction filtration to obtain a precipitate, drying the precipitate for 1.5 hours at the temperature of 80 ℃, then grinding, finally heating to 800 ℃ at the temperature of 10 ℃/min, and calcining for 1 hour at the temperature of 800 ℃ in an air atmosphere to obtain the solar photo-thermal powder;
the volume ratio of the ferric nitrate nonahydrate to the water is 1g:16.5 mL; the molar ratio of iron ions in the ferric nitrate nonahydrate to copper ions in the cupric nitrate trihydrate is 1: 1; the molar ratio of iron ions in the ferric nitrate nonahydrate to manganese ions in the manganese chloride tetrahydrate is 1: 1; the mole number of hydroxide radicals in the sodium hydroxide solution with the mass percentage of 4.2 percent is the same as that of anions in the mixed solution;
secondly, preparing a nano particle solution:
SiO in gas phase2The nano particles are added into cyclohexane to obtain gas phase SiO2Nanoparticle solution of SiO in gas phase2The nano particle solution is dispersed for 20min by ultrasonic to obtain uniform SiO2Suspending the mixture at room temperature under stirringHexadecyltrimethoxysilane and glacial acetic acid were added dropwise to the homogeneous SiO2Stirring the suspension for 1 day to obtain a nanoparticle solution;
the gas phase SiO2The concentration of the nanoparticle solution is 7 mg/mL; the gas phase SiO2The mass ratio of the nano particles to the hexadecyl trimethoxy silane is 1: 3.5; the gas phase SiO2The mass ratio of the nanoparticles to the glacial acetic acid is 1: 0.6;
thirdly, preparing a solar thermal matrix:
mixing solar photo-thermal powder, polydimethylsiloxane and a polydimethylsiloxane curing agent, then grinding for 1h in a ball mill to obtain a coating, and coating the coating on a substrate under the condition that the coating thickness is 200 mu m to obtain a solar thermal matrix;
the mass ratio of the solar photo-thermal powder to the polydimethylsiloxane is 1: 9; the substrate is an aluminum plate;
fourthly, spraying:
firstly, spraying 40 layers of nanoparticle coatings on the upper surface of a solar thermal substrate by using a nanoparticle solution as a spraying liquid under the conditions that the air pressure of a spray gun is 0.6MPa and the distance is 15cm, and then heating for 10min at the temperature of 100 ℃ to obtain a substrate after primary spraying;
secondly, taking the nano-particle solution as spraying liquid, continuously spraying 40 layers of nano-particle coatings on the upper surface of the substrate after the first spraying under the conditions that the air pressure of a spray gun is 0.6MPa and the distance is 15cm, and then heating for 20min under the condition that the temperature is 100 ℃ to obtain the substrate after the second spraying;
thirdly, continuously spraying 40 layers of nano-particle coatings on the upper surface of the substrate sprayed for the second time by using the nano-particle solution as a spraying liquid under the conditions that the air pressure of a spray gun is 0.6MPa and the distance is 15cm, and then heating for 30min under the condition that the temperature is 100 ℃ to obtain the substrate sprayed for the third time;
fourthly, taking the nano-particle solution as spraying liquid, continuously spraying 40 layers of nano-particle coatings on the upper surface of the substrate sprayed for the third time under the conditions that the air pressure of a spray gun is 0.6MPa and the distance is 15cm, and then curing for 1.5 hours under the condition that the temperature is 100 ℃ to obtain the super-hydrophobic photo-thermal ice suppression coating;
gas phase SiO described in step two2The average particle size of the nano particles is 200 nm-300 nm;
the polydimethylsiloxane in the third step is Dow Corning 184; the curing agent of the polydimethylsiloxane in the third step is Dow Corning 184 curing agent; the mass ratio of the polydimethylsiloxane to the polydimethylsiloxane curing agent in the third step is 10: 1.
The spray gun in step four was Taiwan Baoli 116A.
FIG. 1 is a photograph of a super-hydrophobic photo-thermal ice-suppressing coating prepared in the first example; as can be seen, a translucent powdered white coating was attached to the black substrate, indicating successful deposition of the nanoparticles onto the photothermal substrate.
FIG. 2 is an electron micrograph of the superhydrophobic photo-thermal ice-suppressing coating prepared in the first example at magnification of 50000 times; FIG. 3 is an electron micrograph of the superhydrophobic photo-thermal ice-suppressing coating prepared in the first example at a magnification of 100000 times; as can be seen from the figure, the surface of the super-hydrophobic photo-thermal ice-suppressing coating has a good micro-nano structure. The average grain diameter of single nano-particle is 30 nm-40 nm, and the particles are mutually cross-linked due to the addition of hexadecyl trimethoxy silane, so that higher surface roughness is constructed.
FIG. 4 is an electron micrograph of a solar photothermal powder prepared according to one step one of the examples at 60000 times magnification; FIG. 5 is an electron micrograph of a solar photothermal powder prepared according to step one of the examples at 80000 times magnification; the average particle size of the solar photo-thermal powder is 80-100 nm, and the powder prepared by the implementation method is proved to reach the nanometer particle size, so that the powder has larger specific surface area and higher photo-thermal conversion efficiency.
FIG. 6 is an X-ray diffraction pattern of a solar photo-thermal powder prepared in step one of the examples; the method can prepare the pure iron-copper-manganese ternary metal oxide, and the crystal form of the powder is cubic spinel.
FIG. 7 is a photograph showing the contact angle of the superhydrophobic photo-thermal ice-suppressing coating with water prepared in the first example; the contact angle of the super-hydrophobic photo-thermal ice suppression coating prepared in the embodiment to water is 157 degrees, and the water drop is spherical on the sample and is super-hydrophobic. And a roll angle of 2 deg. was measured during the contact angle experiment.
At room temperature, the utilization power is 2000mW/cm2The xenon lamp of (1) irradiates the super-hydrophobic photo-thermal ice-suppressing coating layer with a distance of 10cm from the xenon lamp for 180s, and the temperature rise condition of the super-hydrophobic photo-thermal ice-suppressing coating layer irradiated by the xenon lamp is tested, as shown in fig. 8. FIG. 8 is a temperature rise curve of the super-hydrophobic photothermal ice-suppressing coating prepared in the first example under xenon lamp irradiation; as can be seen from the figure, the photothermal powder prepared in this embodiment can be heated up to 185 ℃ over 180 seconds, and has a good heating effect.
The photo-thermal and freezing rain simulation experiment is carried out on the super-hydrophobic photo-thermal ice inhibition coating: a row of dripping nozzles are manufactured by 5 injectors, the injectors are connected with a deionized water container, the falling speed of water drops is controlled to be about 2.1m/s, the dripping speed is kept at 180 drops/min, the amount of water per drop is kept at 0.05mL, the temperature of the deionized water container is about 0 ℃, and the distance between the injector nozzle and the super-hydrophobic photo-thermal ice suppression coating is 30 cm. The superhydrophobic photothermal ice-suppressing coating was placed on a tilted platform with a 30 ° tilt angle with respect to the horizontal and using a xenon lamp (400 mW/cm)2) And (4) irradiating. Meanwhile, the xenon lamp is 50cm away from the super-hydrophobic photo-thermal ice-suppression coating and vertically irradiates the surface. The sample was placed in the test chamber in advance, and then the temperature of the test chamber was set to-15 ℃, and 20 minutes later, the xenon lamp was turned on to irradiate the surface at the start of the dropping process. And recording the surface temperature by using an infrared imager, and carrying out a photo-thermal freezing rain simulation experiment on the super-hydrophobic photo-thermal ice-suppressing coating. FIG. 9 is a graph of icing for a simulated freezing rain test of aluminum panels at low temperature for 25 minutes. FIG. 10 is a graph of icing conditions of a simulated freezing rain experiment of the superhydrophobic photothermal ice suppression coating prepared in the first example for 25 minutes at a low temperature. As can be seen, the super-hydrophobic photothermal ice-suppressing coating prepared in the first example has no ice crystal formation on the surface in a simulated freezing rain experiment in 25 minutes; the complete ice suppression effect can be achieved under the irradiation of a xenon lamp.
Under the condition of the ice-freezing rain simulation experiment, the temperature rise test is carried out on the surface of the super-hydrophobic photo-thermal ice-suppressing coating, and the super-hydrophobic photo-thermal ice-suppressing coating is heated in a low-temperature environment of-15 ℃ and a xenon lamp (400 mW/cm) with certain power2) Under irradiation, coatingThe layer shows excellent super-hydrophobicity, the temperature rise amplitude reaches more than 40 ℃, and the stability is kept, so that the ice inhibition effect is achieved;
and (3) carrying out adhesion test on the super-hydrophobic photo-thermal ice-suppressing coating: first, 1.5mL of deionized water was poured into a 1.2cm diameter glass column and placed on the coating. Then, it was placed in an incubator at-25 ℃ to form a complete icicle on the surface of the coating. After 2h the glass column was removed and the sample was placed in a test zone equipped with a tension sensor, the temperature of the test zone was kept at-20 ℃ and the force of the icicle detaching from the coating surface was measured in the tension sensor with a probe having a diameter of 0.7cm at a constant speed of 1 mm/s. The measured maximum breaking force was recorded and 5 parallel samples were measured to obtain an average value (Fp). The adhesion strength of ice was calculated by dividing Fp by the contact area s, which was 1.1304X 10-4m2. Tests show that the adhesion of the coating to ice under xenon lamp irradiation is as low as 2.1 KPa.
Claims (7)
1. A preparation method of a super-hydrophobic photo-thermal ice-suppressing coating by taking iron-copper-manganese metal salt and nano silicon dioxide as raw materials is characterized by comprising the following steps:
firstly, preparing solar photo-thermal powder:
mixing ferric nitrate nonahydrate, copper nitrate trihydrate, manganese chloride tetrahydrate and water to obtain a mixed solution, then simultaneously dripping 3-8% of sodium hydroxide solution and the mixed solution into a container and stirring to obtain a mixture, controlling the dripping speed in the dripping process to keep the pH of the mixture to be 10.5-11.5, standing the mixture at room temperature for 1-4 h, removing supernatant and carrying out suction filtration to obtain a precipitate, drying the precipitate for 1-3 h at the temperature of 50-120 ℃, grinding, finally heating to 800 ℃ at the heating speed of 5-20 ℃/min, and calcining for 1-2 h at the temperature of 800 ℃ in an air atmosphere to obtain solar photothermal powder;
the volume ratio of the ferric nitrate nonahydrate to the water is 1g (10-20) mL; the molar ratio of iron ions in the ferric nitrate nonahydrate to copper ions in the cupric nitrate trihydrate is 1: 1; the molar ratio of iron ions in the ferric nitrate nonahydrate to manganese ions in the manganese chloride tetrahydrate is 1: 1; the mole number of hydroxide radicals in the sodium hydroxide solution with the mass percentage of 3-8% is the same as that of anions in the mixed solution;
secondly, preparing a nano particle solution:
SiO in gas phase2The nano particles are added into cyclohexane to obtain gas phase SiO2Nanoparticle solution of SiO in gas phase2The nano particle solution is dispersed for 5min to 30min by ultrasonic to obtain uniform SiO2Suspending, dropwise adding hexadecyl trimethoxy silane and glacial acetic acid into uniform SiO under stirring at room temperature2Stirring the suspension for 1 to 2 days to obtain a nano-particle solution;
the gas phase SiO2The concentration of the nano-particle solution is 5 mg/mL-25 mg/mL; the gas phase SiO2The mass ratio of the nano particles to the hexadecyl trimethoxy silane is 1 (2-4); the gas phase SiO2The mass ratio of the nano particles to the glacial acetic acid is 1 (0.5-1);
thirdly, preparing a solar thermal matrix:
mixing solar photo-thermal powder, polydimethylsiloxane and a polydimethylsiloxane curing agent, then grinding for 1-3 h in a ball mill to obtain a coating, and coating the coating on a substrate under the condition that the coating thickness is 100-600 mu m to obtain a solar thermal substrate;
the mass ratio of the solar photo-thermal powder to the polydimethylsiloxane is 1 (9-15);
fourthly, spraying:
firstly, taking a nano-particle solution as a spraying liquid, spraying 15 to 50 layers of nano-particle coatings on the upper surface of a solar thermal substrate under the conditions that the air pressure of a spray gun is 0.4 to 0.7MPa and the distance is 15 to 20cm, and then heating for 10 to 20min at the temperature of between 100 and 135 ℃ to obtain a substrate after primary spraying;
secondly, taking the nano-particle solution as a spraying liquid, continuously spraying 15 to 50 layers of nano-particle coatings on the upper surface of the substrate after the first spraying under the conditions that the air pressure of a spray gun is 0.4 to 0.7MPa and the distance is 15 to 20cm, and then heating for 20 to 30min at the temperature of between 100 and 135 ℃ to obtain the substrate after the second spraying;
thirdly, taking the nano-particle solution as a spraying liquid, continuously spraying 15 to 50 layers of nano-particle coatings on the upper surface of the substrate after the second spraying under the conditions that the air pressure of a spray gun is 0.4 to 0.7MPa and the distance is 15 to 20cm, and then heating for 30 to 50 minutes at the temperature of between 100 and 135 ℃ to obtain the substrate after the third spraying;
and fourthly, taking the nano-particle solution as a spraying liquid, continuously spraying 15 to 50 layers of nano-particle coatings on the upper surface of the substrate after the third spraying under the conditions that the air pressure of a spray gun is 0.4 to 0.7MPa and the distance is 15 to 20cm, and then curing for 1 to 3 hours at the temperature of between 100 and 135 ℃ to obtain the super-hydrophobic photo-thermal ice suppression coating.
2. The method for preparing the superhydrophobic photothermal ice-suppressing coating using the metal salts of iron, copper and manganese and nano-silica as raw materials according to claim 1, wherein the gas phase SiO in the second step2The average particle diameter of the nano-particles is 200 nm-300 nm.
3. The method for preparing the super-hydrophobic photo-thermal ice-suppressing coating by using the iron-copper-manganese metal salt and the nano-silica as the raw materials according to claim 1, wherein the mass ratio of the polydimethylsiloxane to the curing agent of the polydimethylsiloxane in the third step is 10: 1.
4. The method for preparing the superhydrophobic photothermal ice-suppressing coating using the metal salts of iron, copper and manganese and nano-silica as raw materials according to claim 1, wherein the gas phase SiO in the second step2The concentration of the nano-particle solution is 7 mg/mL-25 mg/mL; gas phase SiO described in step two2The mass ratio of the nano particles to the hexadecyl trimethoxy silane is 1 (2-3.5); gas phase SiO described in step two2The mass ratio of the nano particles to the glacial acetic acid is 1 (0.6-1).
5. The method for preparing the superhydrophobic photothermal ice suppression coating using the iron-copper-manganese metal salt and the nano-silica as the raw materials according to claim 1 is characterized in that in the third step, the solar photothermal powder, the polydimethylsiloxane and the curing agent of the polydimethylsiloxane are mixed, then the mixture is ground in a ball mill for 1 to 2 hours to obtain the coating, and the coating is coated on a substrate under the condition that the coating thickness is 200 to 600 microns to obtain the solar thermal substrate.
6. The method for preparing the superhydrophobic photothermal ice-suppressing coating using the metal salts of iron, copper and manganese and nano-silica as raw materials according to claim 1, wherein the gas phase SiO is formed in the second step2The nano particles are added into cyclohexane to obtain gas phase SiO2Nanoparticle solution of SiO in gas phase2The nano particle solution is dispersed for 5min to 20min by ultrasonic to obtain uniform SiO2Suspending, dropwise adding hexadecyl trimethoxy silane and glacial acetic acid into uniform SiO under stirring at room temperature2And stirring the suspension for 1 to 1.5 days to obtain a nano-particle solution.
7. The preparation method of the super-hydrophobic photo-thermal ice-suppressing coating by taking the iron-copper-manganese metal salt and the nano silicon dioxide as the raw materials according to claim 1 is characterized in that in the fourth step, the heating is carried out for 10 min; heating for 20min in the fourth step; heating for 30min in the step four; and fourthly, curing for 1.5 h.
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