CN115160857A - 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 PDF

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CN115160857A
CN115160857A CN202210799708.2A CN202210799708A CN115160857A CN 115160857 A CN115160857 A CN 115160857A CN 202210799708 A CN202210799708 A CN 202210799708A CN 115160857 A CN115160857 A CN 115160857A
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stirring
zif
coating
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deicing
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CN115160857B (en
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李政通
蔡昊天
杨涛
李娇阳
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Hohai University HHU
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    • 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
    • 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
    • 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
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    • 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
    • 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
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    • B05D7/52—Two layers
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    • B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
    • 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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    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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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
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    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
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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: sequentially pouring ethyl cellulose, ZIF-8 derived hollow porous carbon fiber and sodium chloride into absolute ethyl alcohol, performing ultrasonic treatment and stirring, spraying on the surface of a base material to serve as a bottom layer, naturally drying and curing the bottom layer, pouring fluorinated silica into ethyl acetate, stirring, spraying on the bottom layer to serve as a surface layer, and naturally drying and curing the surface layer; the coating carries out deicing from two dimensions of source and result, not only has good anti-icing performance, but also has excellent quick deicing effect, and carries out double insurance on preventing ice damage.

Description

Super-hydrophobic anti-icing coating for passive photo-thermal deicing and preparation method and application thereof
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 droplets on infrastructure and industrial products frost, ice, and are likely to cause serious safety problems and huge economic losses. For example, ice accretion on the surface of the aircraft and at the turbine can cause difficulties in the operation of the aircraft and even disastrous events, while ice accretion on the electric lines can cause the electric lines to snap and the power grid to break down. Therefore, the ice prevention and the deicing have important significance for reducing ice disasters and economic losses.
The problem of ice accumulation is generally solved by two means of ice prevention and ice removal, and the conventional technologies such as electrothermal ice removal, mechanical ice removal, hot air ice removal and the like are all biased to remove ice, so that the problems of high energy consumption, low efficiency and the like exist; however, a few anti-icing means are not widely popularized due to the reasons of high cost, easy environmental pollution and the like.
There have been some attempts by scholars to develop new anti-icing materials. Jin and the like are combined with a specific micro-nano structure and a chemical modification technology to manufacture a super-hydrophobic surface with ideal ice resistance; wang et al combine PDMS (polydimethylsiloxane) microcapsules with ZnO nanowires to produce a flexible superhydrophobic surface that has outstanding water and ice resistance at low temperatures. Although the prior art has achieved tremendous success in anti-icing, most passive anti-icing materials can still freeze at very low temperatures. Thus, de-icing is essential for safety.
Although the negative effects of icing can be reduced by the current deicing technologies such as electrothermal deicing, hot air deicing, mechanical deicing and the like, the problems of high energy consumption and low efficiency are generally existed. Other effective deicing methods are mainly based on chemical liquids, can lower the freezing point of water, but are harmful to the environment and have a corrosive effect on metals, so recently, researchers are continuously seeking new breakthroughs in clean deicing technology. Dash et al developed an extensible photothermal conversion film that exhibited good photothermal conversion efficiency and exhibited efficient solar deicing performance. Zhang et al produced a film with highly effective solar anti-icing and condensate self-cleaning effects, overcoming the disadvantage of the anti-icing material failing due to frosting within the surface texture. However, the above 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, and aims to solve the problems of poor anti-icing effect, low deicing efficiency, high energy consumption and environmental pollution in the anti-icing and deicing technologies in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the invention provides a preparation method of a super-hydrophobic anti-icing coating for passive photo-thermal deicing, which comprises the following steps: sequentially pouring ethyl cellulose, ZIF-8 derived hollow porous carbon fiber and sodium chloride into absolute ethyl alcohol, performing ultrasonic treatment and stirring, spraying on the surface of a base material to serve as a bottom layer, naturally drying and curing the bottom layer, pouring fluorinated silica into ethyl acetate, stirring, spraying on the bottom layer to serve as a surface layer, and naturally drying and curing the surface layer; the sodium chloride can reduce the freezing point of water drops and increase the contact angle of the coating, thereby improving the anti-icing performance of the surface of the coating.
Further, the mass-to-volume ratio of the ethyl cellulose, the ZIF-8 derived hollow porous carbon fibers, the sodium chloride and the absolute ethyl alcohol is 3-8;
the mass volume ratio of the fluorinated silica to the ethyl acetate is 2-20;
sequentially pouring ethyl cellulose, hollow porous carbon fiber derived from ZIF-8 and sodium chloride into absolute ethyl alcohol, firstly carrying out ultrasonic treatment for 2 hours, and then stirring for 3 hours;
the fluorinated silica was poured into ethyl acetate and stirred for 3h.
Further, the preparation method of the ZIF-8 derived hollow porous carbon fiber includes:
sequentially adding dimethyl imidazole and CTAB (cetyl trimethyl ammonium bromide) into deionized water, and uniformly stirring to obtain a solution A; adding Zn (NO) 3 ) 2 ·6H 2 Adding O into deionized water to obtain a solution B; pouring the solution B into the solution A, stirring for reaction, after the reaction is finished, centrifugally washing, taking the lower layer for precipitation, 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 in a nitrogen atmosphere to obtain ZIF-8-derived hollow porous carbon fibers; the surface of the ZIF-8 derived hollow porous carbon fiber obtained by electrostatic spinning and carbonization is provided with a large number of polygonal bulges and polygonal pores, so that the ZIF-8 derived hollow porous carbon fiber has a larger specific surface area, the refraction of the ZIF-8 derived hollow porous carbon fiber to sunlight is increased, the photothermal 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 photothermal conversion performance, the temperature rise of the surface of a coating can be accelerated, and the deicing of the coating is accelerated.
Further, dimethylimidazole, CTAB (cetyltrimethylammonium bromide) and Zn (NO) 3 ) 2 ·6H 2 The mass volume ratio of O is 80;
stirring for 30-40min;
the stirring reaction time is 24-26h;
the rotation speed of a centrifugal machine used for centrifugation is 7000-7500r/min, and during centrifugation washing, ethanol is used for washing for 2-3 times, and then deionized water is used for washing for 2-3 times;
the temperature for drying is 70-80 ℃, and the drying time is 6-7h.
Further, the mass-to-volume ratio of the ZIF-8 powder, DMF (N, N-dimethylformamide) and polyacrylonitrile is 6;
adding polyacrylonitrile, and stirring at 64-66 deg.C;
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 ℃ and maintained for 1h, then the temperature is increased to 800-1000 ℃ and maintained for 3h, and the temperature increase rate is 4.5-5 ℃/min.
Further, the preparation method of the fluorinated silica comprises the following steps: mixing SiO 2 Adding into mixed solution of ethanol, ammonia water and deionized water, performing ultrasonic treatment and stirring, adding PFDTES (heptadecafluorodecyltriethoxysilane), continuously stirring and reacting at a certain temperature, after the reaction is finished, performing centrifugal washing, taking a lower layer precipitate, and drying to obtain fluorinated silica; the hydrophobic fluorinated silica has excellent hydrophobic property, can increase the contact angle of the coating, can efficiently reduce the adhesive force of icicles 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.
Further, siO 2 And the mass to volume ratio of PFDTES is 2;
mixing SiO 2 Adding into mixed solution of ethanol, ammonia water and deionized water, performing ultrasonic treatment for 30min, and stirring for 2-3h;
adding PFDTES (heptadecafluorodecyltriethoxysilane), and continuously stirring at 40 ℃ for reaction for 24-26h;
the rotation speed of a centrifugal machine used for centrifugation is 8000-8500r/min, and during centrifugal washing, ethanol is used for washing for 2-3 times, and then deionized water is used for washing for 2-3 times;
the temperature for drying is 70 ℃, and the drying time is 6-7h.
Further, the base materials comprise wings, high-voltage wires and cement pavements; the super-hydrophobic anti-icing coating can be suitable for the surfaces of base materials in 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 for passive photo-thermal deicing, which is prepared by the method.
In a third aspect, the invention provides application of the super-hydrophobic anti-icing coating for passive photo-thermal deicing to prevent 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 photothermal deicing and the preparation method and application thereof, the surface of the ZIF-8 derived hollow porous carbon fiber contained in the bottom layer is provided with a large number of polygonal bulges and 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 photothermal 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 photothermal conversion performance, the temperature rise of the surface of the coating can be accelerated, and the deicing of the coating is 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 hydrophobic agent fluorinated silica contained in the surface layer has excellent hydrophobic property, can increase the contact angle of the coating, can efficiently reduce the adhesive force of icicles 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 anti-icing 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;
the super-hydrophobic ice-coating-preventing coating has the advantages of simple use mode, extremely strong self-cleaning performance, difficult breakage and pollution on the surface of the coating and long service life;
the super-hydrophobic anti-icing coating carries out deicing from two dimensions of source and result, not only has good anti-icing performance, but also has excellent quick deicing effect, and carries out double insurance on preventing ice damage;
the super-hydrophobic anti-icing coating is low in cost, simple in manufacturing process, almost free of byproducts in the manufacturing process, free of toxic and harmful gas emission and low in manufacturing energy consumption.
Drawings
FIG. 1 is ZIF-8 derived hollow porous carbon fiber powder obtained in example 1 of the present invention;
FIG. 2 shows a fluorinated silica powder obtained in example 1 of the present invention;
FIG. 3 is a contact angle test result of a coating layer using ZIF-8 derived hollow porous carbon fibers prepared at a carbonization temperature of 400 to 600 ℃ as a coating material;
FIG. 4 is a contact angle test result of a coating layer using ZIF-8 derived hollow porous carbon fiber prepared at a carbonization temperature of 800-1000 ℃ as a coating material;
FIG. 5 is the contact angle test results for coatings using a common hydrophobizing agent material as the coating material;
fig. 6 is the contact angle test results for the coating using the hydrophobic agent fluorinated silica as the coating material.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
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 (cetyl trimethyl ammonium bromide) into 50mL of deionized water, stirring for 35min, and uniformly mixing to obtain a solution A; 0.35g of Zn (NO) 3 ) 2 ·6H 2 Adding O into 50mL of deionized water to obtain a solution B; pouring the solution B into the solution A, stirring for reaction for 25h, centrifuging and washing by a centrifuge with the rotating speed of 7500r/min after the reaction is finished, and firstly separating by using ethanolWashing with deionized water for 3 times, centrifuging with deionized water for 2 times, collecting the lower layer precipitate, and oven drying in 75 deg.C oven for 7h 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 collection distance is 15cm, and the injection speed is 0.09mm/min; and (2) carbonizing the ZIF-8-based fiber in a muffle furnace in a nitrogen atmosphere to obtain the ZIF-8 derived hollow porous carbon fiber, wherein during carbonization, the temperature in the muffle furnace is firstly increased to 240 ℃, maintained for 1h, then increased to 1000 ℃, maintained for 3h, and the temperature increase rate is 4.5 ℃/min.
The preparation method of the fluorinated silica comprises the following steps: 1g of SiO 2 Adding 45mL of ethanol, 2mL of ammonia water and 5mL of deionized water into a mixed solution, performing ultrasonic treatment for 30min, stirring for 3h, adding 0.5mL of PFDTES (heptadecafluorodecyltriethoxysilane), continuously stirring at 40 ℃ for reaction for 25h, after the reaction is finished, performing centrifugal washing by a centrifugal machine at the rotating speed of 8500r/min, performing centrifugal washing for 3 times by ethanol, performing centrifugal washing for 2 times by deionized water, taking a lower-layer precipitate, and drying in an oven at 70 ℃ for 6h to obtain the fluorinated silica.
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, performing ultrasonic treatment for 2h, 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 black 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 pavements.
FIG. 3 is a contact angle test result of a coating layer using ZIF-8 derived hollow porous carbon fibers prepared at a carbonization temperature of 400 to 600 ℃ as a coating material. FIG. 4 is a contact angle test result of a coating layer using ZIF-8 derived hollow porous carbon fibers prepared at a carbonization temperature of 800-1000 ℃ as a coating material. As can be seen from fig. 3 and 4: when the ZIF-8 derived hollow porous carbon fiber prepared at the carbonization temperature of 800-1000 ℃ is used as a coating raw material, the contact angle of the coating is more than 130 degrees, and when the ZIF-8 derived hollow porous carbon fiber prepared at the carbonization temperature of 400-600 ℃ is used as a coating raw material, the contact angle of the coating is less than 120 degrees; the test result shows that: when the ZIF-8 derived hollow porous carbon fiber prepared at the ultrahigh-temperature carbonization temperature of 800-1000 ℃ is used as a coating raw material, the hydrophobicity of the coating is better.
Fig. 5 shows the contact angle test results of the coating layer using a general hydrophobizing agent material as a coating material. Fig. 6 shows the results of contact angle measurements of coatings using fluorinated silica as the hydrophobic agent as the coating material. As can be seen in fig. 5 and 6: when the hydrophobic agent fluorinated silica is used as a coating raw material, the contact angle of the coating is obviously larger than that of the coating when a common hydrophobic agent material is used as the coating raw material; the test result shows that: the hydrophobic agent fluorinated silica 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 with 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 icicles of the same mass were respectively solidified on the surfaces of the coatings of example 1 and comparative examples 1 to 3, and the adhesive force (N) of the icicles with time on the surfaces of the coatings of example 1 and comparative examples 1 to 3 was measured by an electronic push-pull tester, and the results are shown in Table 1.
TABLE 1 adhesion of icicles to the surface of the coatings of example 1 and comparative examples 1 to 3 over time
Figure BDA0003737015720000101
As can be seen from table 1: the adhesion of the icicles on the coating surface of example 1 was always less than or equal to the adhesion of the icicles on the coating surfaces of comparative examples 1 to 3 over time; the test result shows that: the coated surface of example 1 had excellent deicing performance.
4 parts of water droplets of the same mass were dropped on the surfaces of the coatings of example 1 and comparative examples 1 to 3, respectively, and the time for the water droplets to completely coagulate was tested at-20 ℃ to 10 ℃ in the presence and absence of sunlight, respectively. The test results are: in a non-light environment, the condensation time of the water drops on the coating surface of the embodiment 1 is 1080s, which is prolonged by 450s compared with the condensation time of the water drops on the coating surfaces of the comparative examples 1 to 3; the time for which the water droplets condensed on the surface of the coating layer of example 1 in the sunlight environment was 1620 seconds, which was 800 seconds longer than the time for which the water droplets condensed on the surface of the coating layers of comparative examples 1 to 3; the test result shows that: the coating of example 1 has excellent anti-icing characteristics. In addition, after the ice on the surface of the coating of example 1 melted, the coating could be recycled, indicating that the coating had excellent self-cleaning ability and service 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 attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. A preparation method of a super-hydrophobic anti-icing coating for passive photo-thermal deicing is characterized by comprising the following steps: sequentially pouring ethyl cellulose, ZIF-8 derived hollow porous carbon fiber and sodium chloride into absolute ethyl alcohol, performing ultrasonic treatment and stirring, spraying on the surface of a substrate to serve as a bottom layer, naturally drying and curing the bottom layer, pouring fluorinated silica into ethyl acetate, stirring, spraying on the bottom layer to serve as a surface layer, and naturally drying and curing the surface layer.
2. The preparation method of the superhydrophobic anti-icing coating for passive photothermal deicing according to claim 1, wherein the mass-to-volume ratio of the ethyl cellulose, the ZIF-8 derived hollow porous carbon fibers, the sodium chloride and the absolute ethyl alcohol is 3-8;
the mass volume ratio of the fluorinated silica to the ethyl acetate is 2-20;
sequentially pouring ethyl cellulose, hollow porous carbon fiber derived from ZIF-8 and sodium chloride into absolute ethyl alcohol, firstly carrying out ultrasonic treatment for 2 hours, and then stirring for 3 hours;
the fluorinated silica was poured into ethyl acetate and stirred for 3h.
3. The method for preparing the superhydrophobic anti-icing coating for passive photothermal deicing according to claim 1, wherein the method for preparing the ZIF-8 derived hollow porous carbon fibers comprises:
sequentially adding dimethylimidazole and CTAB into deionized water, and uniformly stirring to obtain solution A; adding Zn (NO) 3 ) 2 ·6H 2 Adding O into deionized water to obtain a solution B; pouring the solution B into the solution A, stirring for reaction, after the reaction is finished, centrifugally washing, taking the lower layer for precipitation, and drying to obtain ZIF-8 powder;
adding ZIF-8 powder into DMF (dimethyl formamide), 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 in a nitrogen atmosphere to obtain the ZIF-8-derived hollow porous carbon fibers.
4. Preparation of the superhydrophobic anti-icing coating for passive photothermal deicing according to claim 3Method, characterized in that the dimethylimidazole, CTAB and Zn (NO) 3 ) 2 ·6H 2 The mass-to-volume ratio of O is 80;
the time for uniformly stirring is 30-40min;
the stirring reaction time is 24-26h;
the rotating speed of a centrifugal machine used for centrifugation is 7000-7500r/min, and during centrifugal washing, ethanol is used for washing for 2-3 times, and then deionized water is used for washing for 2-3 times;
the temperature for drying is 70-80 ℃, and the drying time is 6-7h.
5. The method for preparing the superhydrophobic anti-icing coating for passive photothermal deicing according to claim 3, wherein the mass-to-volume ratio of the ZIF-8 powder, DMF and polyacrylonitrile is 6;
adding polyacrylonitrile, and stirring at 64-66 deg.C;
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 ℃ and maintained for 1h, then the temperature is increased to 800-1000 ℃ and maintained for 3h, and the temperature increase rate is 4.5-5 ℃/min.
6. The method for preparing the superhydrophobic anti-icing coating for passive photothermal deicing according to claim 1, wherein the method for preparing the fluorinated silica comprises: mixing SiO 2 Adding into mixed solution of ethanol, ammonia water and deionized water, performing ultrasonic treatment and stirring, adding PFDTES, continuously stirring and reacting at a certain temperature, after the reaction is finished, performing centrifugal washing, taking the lower layer for precipitation, and drying to obtain the fluorinated silica.
7. The method for preparing the superhydrophobic anti-icing coating for passive photothermal deicing according to claim 6, wherein the SiO is 2 And the mass to volume ratio of PFDTES is 2;
mixing SiO 2 Adding into mixed solution of ethanol, ammonia water and deionized water, performing ultrasonic treatment for 30min, and stirring for 2-3h;
adding PFDTES, and continuously stirring and reacting at 40 ℃ for 24-26h;
the rotating speed of a centrifugal machine used for centrifugation is 8000-8500r/min, and during centrifugal washing, ethanol is used for washing for 2-3 times, and then deionized water is used for washing for 2-3 times;
the temperature for drying is 70 ℃, and the drying time is 6-7h.
8. The method for preparing the superhydrophobic anti-icing coating for passive photothermal deicing according to claim 1, wherein the substrate comprises an airfoil, a high voltage wire and a cement pavement.
9. The superhydrophobic anti-icing coating for passive photo-thermal deicing prepared by the method of any one of claims 1 to 8.
10. Use of the superhydrophobic anti-icing coating of passive photothermal deicing according to claim 9 for preventing icing on a material surface.
CN202210799708.2A 2022-07-08 2022-07-08 Super-hydrophobic anti-icing coating for passive photo-thermal deicing and preparation method and application thereof Active CN115160857B (en)

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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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* Cited by examiner, † Cited by third party
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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