CN115160857B - Super-hydrophobic anti-icing coating for passive photo-thermal deicing and preparation method and application thereof - Google Patents
Super-hydrophobic anti-icing coating for passive photo-thermal deicing and preparation method and application thereof Download PDFInfo
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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
- C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
- C09D101/08—Cellulose derivatives
- C09D101/26—Cellulose ethers
- C09D101/28—Alkyl ethers
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
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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
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
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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
- 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
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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
- 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
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
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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
- 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
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/546—No clear coat specified each layer being cured, at least partially, separately
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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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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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
Abstract
The invention discloses a super-hydrophobic anti-icing coating for passive photo-thermal deicing, and a preparation method and application thereof, wherein the preparation method of the coating comprises the following steps: pouring ethyl cellulose, ZIF-8 derived hollow porous carbon fiber and sodium chloride into absolute ethyl alcohol in sequence, spraying the mixture on the surface of a substrate to serve as a bottom layer after ultrasonic and stirring, pouring fluorinated silicon dioxide into ethyl acetate after the bottom layer is naturally dried and solidified, spraying the mixture on the bottom layer to serve as a surface layer after stirring, and naturally drying and solidifying the surface layer; the coating removes ice from two dimensions of a source and a result, not only has good anti-icing performance, but also has excellent rapid deicing effect, and double insurance is carried out on preventing ice damage.
Description
Technical Field
The invention relates to the technical field of anti-icing materials, in particular to a super-hydrophobic anti-icing coating for passive photo-thermal deicing, and a preparation method and application thereof.
Background
Ice formation and accumulation is a natural phenomenon, but water drops on infrastructure and industrial products frost and freeze, possibly causing serious safety problems and huge economic losses. Ice build-up at, for example, aircraft surfaces and turbines can cause aircraft operation difficulties and even catastrophic events, while ice build-up on electrical wires can cause electrical wires to stretch out and the grid to break. Anti-icing, deicing is therefore of great importance for reducing ice hazards and economic losses.
The problem of ice accumulation is generally solved by two means of anti-icing and deicing, and the conventional technologies such as electrothermal deicing, mechanical deicing, hot air deicing and the like are biased to deicing, so that the problems of high energy consumption, low efficiency and the like exist; however, the cost is too high, and environmental pollution is easy to occur, so that the method is not widely popularized.
There have been some scholars trying to develop new anti-icing materials. Jin and the like are used for manufacturing the super-hydrophobic surface with ideal ice resistance by combining a specific micro-nano structure and a chemical modification technology; wang et al combine PDMS (polydimethylsiloxane) microcapsules with ZnO nanowires to create a flexible superhydrophobic surface with outstanding water and ice resistance at low temperatures. Although the prior art has achieved tremendous success in anti-icing, most passive anti-icing materials may freeze at very low temperatures. Deicing is therefore essential for safety reasons.
Current deicing technologies such as electrothermal deicing, hot air deicing, mechanical deicing, etc. while capable of mitigating the negative effects of icing, they generally suffer from high energy consumption and low efficiency. Other effective deicing methods are mainly based on chemical liquids, which can lower the freezing point of water, but are harmful to the environment and corrosive to metals, so that new breakthroughs of clean deicing technology have been continuously sought by students recently. Dash et al developed an extensible photothermal conversion film that showed good photothermal conversion efficiency and high efficiency of solar deicing. Zhang et al manufactured a film with high efficiency solar anti-icing and condensate self-cleaning effects, overcoming the defect of failure of anti-icing materials due to frosting in the surface texture. However, the materials have the problems of high manufacturing cost, more byproducts in the manufacturing process, serious pollution, more energy consumption and the like.
Disclosure of Invention
The invention aims to provide a super-hydrophobic anti-icing coating for passive photo-thermal deicing, and a preparation method and application thereof, so as to solve the problems of poor anti-icing effect, low deicing efficiency, high energy consumption and environmental pollution in the anti-icing and deicing technology in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
in a first aspect, the invention provides a method for preparing a super-hydrophobic anti-icing coating for passive photo-thermal deicing, which comprises the following steps: pouring ethyl cellulose, ZIF-8 derived hollow porous carbon fiber and sodium chloride into absolute ethyl alcohol in sequence, spraying the mixture on the surface of a substrate to serve as a bottom layer after ultrasonic and stirring, pouring fluorinated silicon dioxide into ethyl acetate after the bottom layer is naturally dried and solidified, spraying the mixture on the bottom layer to serve as a surface layer after stirring, and naturally drying and solidifying the surface layer; the sodium chloride can reduce the freezing point of water drops and increase the contact angle of the coating, so that the anti-icing performance of the surface of the coating is improved.
Further, the mass volume ratio of the ethyl cellulose to the ZIF-8 derived hollow porous carbon fiber to the sodium chloride to the absolute ethyl alcohol is 3-8:1-3:10-40:1mg/mg/mg/mL;
the mass volume ratio of the fluorinated silica to the ethyl acetate is 2-20:1mg/mL;
sequentially pouring ethyl cellulose, ZIF-8 derived hollow porous carbon fiber and sodium chloride into absolute ethyl alcohol, performing ultrasonic treatment for 2 hours, and stirring for 3 hours;
the fluorided silica was poured into ethyl acetate and stirred for 3h.
Further, the preparation method of the ZIF-8-derived hollow porous carbon fiber comprises the following steps:
sequentially adding dimethyl imidazole and CTAB (cetyltrimethylammonium bromide) into deionized water, and stirring and uniformly mixing to obtain a solution A; zn (NO) 3 ) 2 ·6H 2 O is added into deionized water to obtain solution B; pouring the solution B into the solution A, stirring for reaction, centrifugally washing after the reaction is finished, taking out the lower layer precipitate, and drying to obtain ZIF-8 powder;
adding ZIF-8 powder into DMF (N, N-dimethylformamide), performing ultrasonic dispersion, then adding polyacrylonitrile, stirring at a certain temperature until a uniform viscous solution is obtained, performing electrostatic spinning on the uniform viscous solution to obtain ZIF-8-based fibers, and carbonizing the ZIF-8-based fibers in a muffle furnace under nitrogen atmosphere to obtain ZIF-8-derived hollow porous carbon fibers; the surface of the ZIF-8 derived hollow porous carbon fiber obtained through electrostatic spinning and carbonization is provided with a large number of polygonal protrusions and a large number of polygonal pores, so that the ZIF-8 derived hollow porous carbon fiber has a relatively large specific surface area, the refraction of the ZIF-8 derived hollow porous carbon fiber to sunlight is increased, the photo-thermal conversion efficiency of the ZIF-8 derived hollow porous carbon fiber to sunlight is remarkably improved, the ZIF-8 derived hollow porous carbon fiber has excellent photo-thermal conversion performance, the temperature rise of the surface of the coating can be accelerated, and the deicing of the coating can be further accelerated.
Further, dimethylimidazole, CTAB (cetyltrimethylammonium bromide) and Zn (NO 3 ) 2 ·6H 2 The mass-volume ratio of O is 80:50:7g/mL/g;
stirring and mixing for 30-40min;
stirring and reacting for 24-26h;
the rotation speed of the centrifugal machine used for centrifugation is 7000-7500r/min, and during centrifugal washing, ethanol is firstly used for washing 2-3 times, and deionized water is used for washing 2-3 times;
the temperature used for drying is 70-80 ℃, and the drying time is 6-7h.
Further, the mass-to-volume ratio of ZIF-8 powder, DMF (N, N-dimethylformamide) and polyacrylonitrile is 6:50:7g/mL/g;
adding polyacrylonitrile, and stirring at 64-66 ℃;
during electrostatic spinning, the voltage is 10.4-10.5kV, the collecting distance is 15cm, and the injection speed is 0.08-0.09mm/min;
during carbonization, the temperature in the muffle furnace is firstly increased to 240 ℃ for 1h, then increased to 800-1000 ℃ for 3h, and the heating rate is 4.5-5 ℃/min.
Further, the preparation method of the fluorided silica comprises the following steps: siO is made of 2 Adding ethanol, ammonia water and deionized water into the mixed solution, carrying out ultrasonic treatment and stirring, then adding PFDTES (heptadecafluorodecyl triethoxysilane), continuously stirring at a certain temperature for reaction, centrifuging and washing after the reaction is finished, taking out the lower layer precipitate, and drying to obtain fluorinated silicon dioxide; the hydrophobe fluorinated silica has excellent hydrophobic properties,the contact angle of the coating can be increased, the adhesive force of the icicle on the surface of the coating can be effectively reduced, the adhesion of water drops and ice on the surface of the coating is reduced, and the anti-icing and deicing of the surface of the coating are facilitated.
Further, siO 2 And PFDTES is 2:1g/mL;
SiO is made of 2 Adding the mixture of ethanol, ammonia water and deionized water, performing ultrasonic treatment for 30min, and stirring for 2-3h;
after PFDTES (heptadecafluorodecyl triethoxysilane) is added, stirring reaction is continued for 24-26h at 40 ℃;
the rotational speed of the centrifugal machine used for centrifugation is 8000-8500r/min, and during centrifugal washing, ethanol is firstly used for washing 2-3 times, and deionized water is used for washing 2-3 times;
the temperature used for drying is 70 ℃, and the drying time is 6-7h.
Further, the base material comprises wings, high-voltage wires and cement pavement; the super-hydrophobic ice-coating-preventing coating can be suitable for the surfaces of base materials with various shapes, such as wings, high-voltage wires, cement pavements and the like, and has wide applicability.
In a second aspect, the invention provides the super-hydrophobic anti-icing coating prepared by the method and used for passive photo-thermal deicing.
In a third aspect, the invention provides an application of the super-hydrophobic anti-icing coating for passive photo-thermal deicing in preventing icing on the surface of a material.
Compared with the prior art, the invention has the beneficial effects that:
according to the super-hydrophobic anti-icing coating for passive photo-thermal deicing, as well as the preparation method and the application thereof, the surface of the hollow porous carbon fiber derived from ZIF-8 contained in the bottom layer is provided with a large number of polygonal protrusions and a large number of polygonal holes, so that the hollow porous carbon fiber derived from ZIF-8 has a relatively large specific surface area, the refraction of the hollow porous carbon fiber derived from ZIF-8 to sunlight is increased, the photo-thermal conversion efficiency of the hollow porous carbon fiber derived from ZIF-8 to sunlight is remarkably improved, the hollow porous carbon fiber derived from ZIF-8 has excellent photo-thermal conversion performance, the temperature rise of the surface of the coating can be accelerated, and the deicing of the coating is further accelerated;
the sodium chloride contained in the bottom layer can reduce the freezing point of water drops and increase the contact angle of the coating, so that the anti-icing performance of the surface of the coating is improved;
the fluorinated silica of the hydrophobing agent contained in the surface layer has excellent hydrophobic property, can increase the contact angle of the coating, can efficiently reduce the adhesive force of the icicle on the surface of the coating, reduces the adhesion of water drops and ice on the surface of the coating, and is beneficial to the anti-icing and deicing of the surface of the coating;
the super-hydrophobic ice-coating-preventing coating can be applied to the surfaces of base materials with various shapes, such as wings, high-voltage wires, cement pavements and the like, and has wide applicability;
the super-hydrophobic ice-coating-preventing coating is simple in use mode, has extremely strong self-cleaning performance, is not easy to break and pollute the surface of the coating, and has long service life;
the super-hydrophobic ice-coating-preventing coating removes ice from two dimensions of a source and a result, has good ice-preventing performance and excellent quick ice-removing effect, and performs double insurance on ice damage prevention;
the super-hydrophobic anti-icing coating has low cost, simple manufacturing process, almost no byproducts in the manufacturing process, no toxic or harmful gas emission and low manufacturing energy consumption.
Drawings
FIG. 1 is a drawing of a ZIF-8 derived hollow porous carbon fiber powder prepared in example 1 of the present invention;
FIG. 2 is a fluorinated silica powder obtained in example 1 of the present invention;
FIG. 3 is a graph showing the contact angle test results of a coating layer when ZIF-8-derived hollow porous carbon fibers prepared at a carbonization temperature of 400-600 ℃ are used as a coating raw material;
FIG. 4 is a graph showing the contact angle test results of a coating layer when ZIF-8-derived hollow porous carbon fibers prepared at a carbonization temperature of 800-1000 ℃ are used as a coating raw material;
FIG. 5 is a graph showing the contact angle test results of a coating using a conventional hydrophobe material as a coating raw material;
fig. 6 is the contact angle test results of the coating when the hydrophobizing agent fluorinated silica was used as the coating raw material.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
the preparation method of the ZIF-8-derived hollow porous carbon fiber comprises the following steps:
sequentially adding 4g of dimethyl imidazole and 2.5mL of CTAB (cetyltrimethylammonium bromide) into 50mL of deionized water, stirring for 35min, and uniformly mixing to obtain a solution A; 0.35g Zn (NO) 3 ) 2 ·6H 2 O is added into 50mL of deionized water to obtain solution B; pouring the solution B into the solution A, stirring and reacting for 25 hours, centrifugally washing by a centrifugal machine with the rotating speed of 7500r/min after the reaction is finished, centrifugally washing by ethanol for 3 times, centrifugally washing by deionized water for 2 times, taking out the lower-layer precipitate, and drying in an oven at 75 ℃ for 7 hours to obtain ZIF-8 powder;
adding 1.2g of ZIF-8 powder into 10mL of DMF (N, N-dimethylformamide), performing ultrasonic dispersion, then adding 1.4g of polyacrylonitrile, stirring at 65 ℃ until a uniform viscous solution is obtained, and performing electrostatic spinning on the uniform viscous solution to obtain ZIF-8-based fibers, wherein the voltage used during electrostatic spinning is 10.5kV, the collecting distance is 15cm, and the injection speed is 0.09mm/min; and (3) placing the ZIF-8-based fiber in a muffle furnace for carbonization under the nitrogen atmosphere to obtain the ZIF-8-derived hollow porous carbon fiber, and during carbonization, firstly raising the temperature in the muffle furnace to 240 ℃, maintaining for 1h, then raising the temperature to 1000 ℃, and maintaining for 3h, wherein the temperature raising rate is 4.5 ℃/min.
The preparation method of the fluorided silicon dioxide comprises the following steps: 1g of SiO 2 Adding 45mL of ethanol, 2mL of ammonia water and 5mL of deionized water, carrying out ultrasonic treatment for 30min, stirring for 3h, adding 0.5mL of PFDTES (heptadecafluorodecyl triethoxysilane) and adding the mixture into the solution, and adding the solution into the solution to obtain a solution of 4Stirring and reacting for 25h at 0 ℃, after the reaction is finished, centrifugally washing by a centrifugal machine with the rotating speed of 8500r/min, centrifugally washing for 3 times by ethanol, centrifugally washing for 2 times by deionized water, taking the lower layer precipitate, and drying in an oven at 70 ℃ for 6h to obtain the fluoridized silicon dioxide.
A preparation method of a super-hydrophobic anti-icing coating for passive photo-thermal deicing comprises the following steps:
sequentially pouring 0.05g of ethyl cellulose, 0.01g of ZIF-8 derived hollow porous carbon fiber and 0.1g of sodium chloride into 10mL of absolute ethyl alcohol, carrying out ultrasonic treatment for 2h and stirring for 3h to obtain a black solution, spraying the black solution on the surface of a substrate by using a spray gun to serve as a bottom layer, pouring 0.02g of fluorinated silica into 10mL of ethyl acetate after the bottom layer is naturally dried and solidified, stirring for 3h, spraying the solution on the bottom layer by using the spray gun to serve as a surface layer, and naturally drying and solidifying the surface layer; the base material comprises wings, high-voltage wires and cement pavement.
FIG. 3 is a graph showing the contact angle test results of a coating layer when ZIF-8-derived hollow porous carbon fibers prepared at a carbonization temperature of 400-600 ℃ are used as a coating raw material. FIG. 4 shows the contact angle test results of the coating when the ZIF-8 derived hollow porous carbon fiber prepared at the carbonization temperature of 800-1000 ℃ is used as the coating raw material. As can be seen from fig. 3 and 4: the contact angle of the coating is more than 130 degrees when the ZIF-8 derived hollow porous carbon fiber prepared at the carbonization temperature of 800-1000 ℃ is used as the coating raw material, and the contact angle of the coating is still less than 120 degrees when the ZIF-8 derived hollow porous carbon fiber prepared at the carbonization temperature of 400-600 ℃ is used as the coating raw material; the test results show that: when the ZIF-8 derived hollow porous carbon fiber prepared at the ultra-high temperature carbonization temperature of 800-1000 ℃ is used as a coating raw material, the hydrophobicity of the coating is better.
Fig. 5 is a graph showing the contact angle test results of a coating using a general hydrophobizing agent material as a coating raw material. Fig. 6 is a contact angle test result of a coating using a hydrophobic agent fluorinated silica as a coating raw material. As can be seen from fig. 5 and 6: the contact angle of the coating is obviously larger when the fluorinated silica serving as a hydrophobing agent is used as a coating raw material than when the common hydrophobing agent is used as the coating raw material; the test results show that: the hydrophobic agent fluorinated silicon dioxide has excellent hydrophobic performance, and is beneficial to self-cleaning of water drops on the surface of the coating.
Comparative example 1:
the difference from example 1 is that the bottom layer does not contain sodium chloride.
Comparative example 2:
the difference from example 1 is that the fluorinated silica in the surface layer is replaced by a hydrophilic material.
Comparative example 3:
the difference from example 1 is that the bottom layer does not contain sodium chloride and the fluorinated silica in the surface layer is replaced with a hydrophilic material.
4 parts of the same mass of the icicles were solidified on the coating surfaces of example 1 and comparative examples 1 to 3, respectively, and the adhesion (N) of the icicles on the coating surfaces of example 1 and comparative examples 1 to 3 with time was measured by an electron push-pull tester, and the test results are shown in Table 1.
Table 1 adhesion of icicles to the coating surfaces of example 1 and comparative examples 1 to 3 over time
As can be seen from table 1: the adhesion of the icicle to the coating surface of example 1 was consistently less than or equal to the adhesion of the icicle to the coating surfaces of comparative examples 1-3 over time; the test results show that: the coating surface of example 1 has excellent deicing properties.
4 parts of water drops with the same mass are respectively dripped on the surfaces of the coatings of the example 1 and the comparative examples 1 to 3, and the time for the water drops to completely condense is respectively tested under the environment with sunlight illumination and no illumination at the temperature of-20 ℃ to 10 ℃. The test results are: in the non-illuminated environment, the water droplets were condensed at the coating surface of example 1 for 1080s, which was 450s longer than the water droplets were condensed at the coating surfaces of comparative examples 1 to 3; in the sunlight environment, the water drop is condensed on the surface of the coating layer in the example 1 for 1620s, and the time for the water drop to condense on the surface of the coating layer in the comparative examples 1 to 3 is prolonged by 800s; the test results show that: the coating of example 1 has excellent anti-icing properties. In addition, the coating of example 1 was recyclable after ice formation on the surface was thawed, indicating excellent self-cleaning and life.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The preparation method of the super-hydrophobic anti-icing coating for passive photo-thermal deicing is characterized by comprising the following steps of: pouring ethyl cellulose, ZIF-8 derived hollow porous carbon fiber and sodium chloride into absolute ethyl alcohol in sequence, carrying out ultrasonic treatment and stirring, spraying on the surface of a substrate to serve as a bottom layer, pouring fluorinated silicon dioxide into ethyl acetate after the bottom layer is naturally dried and solidified, stirring, spraying on the bottom layer to serve as a surface layer, and naturally drying and solidifying the surface layer, wherein the mass-volume ratio of the ethyl cellulose, ZIF-8 derived hollow porous carbon fiber, sodium chloride and absolute ethyl alcohol is 3-8:1-3:10-40:1mg/mg/mg/mL;
the mass volume ratio of the fluorinated silicon dioxide to the ethyl acetate is 2-20:1mg/mL;
sequentially pouring ethyl cellulose, ZIF-8 derived hollow porous carbon fiber and sodium chloride into absolute ethyl alcohol, performing ultrasonic treatment for 2 hours, and stirring for 3 hours;
pouring the fluorided silica into ethyl acetate, and stirring for 3h;
the preparation method of the ZIF-8-derived hollow porous carbon fiber comprises the following steps:
sequentially adding dimethyl imidazole and CTAB into deionized water, and stirring and uniformly mixing to obtain a solution A; zn (NO) 3 ) 2 ·6H 2 O is added into deionized water to obtain solution B; pouring the solution B into the solution A, stirring for reaction, centrifugally washing after the reaction is finished, taking out the lower layer precipitate, and drying to obtain ZIF-8 powder;
adding ZIF-8 powder into DMF, performing ultrasonic dispersion, then adding polyacrylonitrile, stirring at a certain temperature until a uniform viscous solution is obtained, performing electrostatic spinning on the uniform viscous solution to obtain ZIF-8-based fibers, and placing the ZIF-8-based fibers into a muffle furnace to carbonize under nitrogen atmosphere to obtain ZIF-8-derived hollow porous carbon fibers;
the dimethylimidazole, CTAB and Zn (NO 3 ) 2 ·6H 2 The mass-volume ratio of O is 80:50:7g/mL/g;
the stirring and uniformly mixing time is 30-40min;
the stirring reaction time is 24-26 hours;
the rotating speed of a centrifugal machine used for the centrifugal is 7000-7500r/min, and during the centrifugal washing, ethanol is firstly used for washing 2-3 times, and deionized water is used for washing 2-3 times;
the temperature used for drying is 70-80 ℃, and the drying time is 6-7h;
the mass volume ratio of the ZIF-8 powder to the DMF to the polyacrylonitrile is 6:50:7g/mL/g;
adding polyacrylonitrile, and stirring at 64-66 ℃;
during electrostatic spinning, the voltage is 10.4-10.5kV, the collecting distance is 15cm, and the injection speed is 0.08-0.09mm/min;
during carbonization, the temperature in the muffle furnace is firstly increased to 240 ℃ for 1h, then increased to 800-1000 ℃ for 3h, and the heating rate is 4.5-5 ℃/min.
2. The method for preparing the super-hydrophobic anti-icing coating for passive photothermal deicing according to claim 1, wherein the method for preparing the fluorinated silica comprises the following steps: siO is made of 2 Adding into the mixed solution of ethanol, ammonia water and deionized water, adding PFDTES after ultrasonic and stirring, continuing stirring reaction at a certain temperature, after the reaction is finished, centrifugally washing,and taking the lower layer precipitate, and drying to obtain the fluorinated silica.
3. The method for preparing the super-hydrophobic anti-icing coating for passive photo-thermal deicing according to claim 2, wherein the SiO is prepared by 2 And PFDTES is 2:1g/mL;
SiO is made of 2 Adding the mixture of ethanol, ammonia water and deionized water, performing ultrasonic treatment for 30min, and stirring for 2-3h;
after PFDTES is added, stirring reaction is continued for 24-26 hours at 40 ℃;
the rotating speed of a centrifugal machine used for the centrifugal is 8000-8500r/min, and during the centrifugal washing, ethanol is firstly used for washing 2-3 times, and deionized water is used for washing 2-3 times;
the temperature used for drying is 70 ℃, and the drying time is 6-7h.
4. The method for preparing the super-hydrophobic ice-covering-preventing coating for passive photo-thermal deicing according to claim 1, wherein the substrate comprises wings, high-voltage wires and cement pavement.
5. A superhydrophobic anti-icing coating for passive photothermal deicing prepared by the method of any one of claims 1-4.
6. The use of the superhydrophobic anti-icing coating for passive photothermal deicing of claim 5 for preventing icing on a surface of a material.
Priority Applications (1)
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| CN104629580A (en) * | 2015-01-28 | 2015-05-20 | 西安中交万里新材料有限公司 | Long-acting environment-friendly ice-snow melting pavement coating and preparation method and using method of thereof |
| CN105862174A (en) * | 2016-04-08 | 2016-08-17 | 合肥工业大学 | Preparation method of novel metal organic complex fibers and derivative porous carbon fibers thereof |
| CN111909521A (en) * | 2020-08-24 | 2020-11-10 | 广东工业大学 | Magnetic polymer composite material with efficient photothermal effect and preparation method and application thereof |
| CN112852289A (en) * | 2021-01-12 | 2021-05-28 | 陕西科技大学 | Super-hydrophobic anti-icing and deicing coating with photo-thermal effect and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104629580A (en) * | 2015-01-28 | 2015-05-20 | 西安中交万里新材料有限公司 | Long-acting environment-friendly ice-snow melting pavement coating and preparation method and using method of thereof |
| CN105862174A (en) * | 2016-04-08 | 2016-08-17 | 合肥工业大学 | Preparation method of novel metal organic complex fibers and derivative porous carbon fibers thereof |
| CN111909521A (en) * | 2020-08-24 | 2020-11-10 | 广东工业大学 | Magnetic polymer composite material with efficient photothermal effect and preparation method and application thereof |
| CN112852289A (en) * | 2021-01-12 | 2021-05-28 | 陕西科技大学 | Super-hydrophobic anti-icing and deicing coating with photo-thermal effect and preparation method thereof |
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