CN115193666A - Preparation method of super-hydrophobic surface with micro-nano scale step structure for anti-icing - Google Patents
Preparation method of super-hydrophobic surface with micro-nano scale step structure for anti-icing Download PDFInfo
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- CN115193666A CN115193666A CN202210556900.9A CN202210556900A CN115193666A CN 115193666 A CN115193666 A CN 115193666A CN 202210556900 A CN202210556900 A CN 202210556900A CN 115193666 A CN115193666 A CN 115193666A
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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
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
- B05D1/005—Spin coating
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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
- 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
- B05D3/10—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 other chemical means
- B05D3/102—Pretreatment of metallic substrates
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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
- B05D7/14—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 to metal, e.g. car bodies
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F4/00—Processes for removing metallic material from surfaces, not provided for in group C23F1/00 or C23F3/00
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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
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
- B05D2202/15—Stainless steel
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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
- B05D2202/00—Metallic substrate
- B05D2202/20—Metallic substrate based on light metals
- B05D2202/25—Metallic substrate based on light metals based on Al
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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
- B05D2202/00—Metallic substrate
- B05D2202/40—Metallic substrate based on other transition elements
- B05D2202/45—Metallic substrate based on other transition elements based on Cu
Abstract
The invention relates to a method for preparing an anti-icing super-hydrophobic surface with a micro-nano scale step structure, which is inspired by a natural super-wetting surface and is used for constructing the micro-nano scale step structure on the surface of a metal substrate material. The invention successfully prepares the anti-icing material by simple pre-roughening process of metal substrate material and hydrophobic modification of fluorine-free low surface energy materialA superhydrophobic surface of energy comprising the steps of: pre-roughening the surface of metal material to make it have micron scale structure and no-fluorine hydrophobic SiO 2 Preparing nano particles and preparing an anti-icing self-cleaning super-hydrophobic surface. The surface prepared by the method has super-hydrophobicity, excellent anti-icing performance and anti-frosting performance, so that the surface has wide application prospect in the fields of corrosion resistance and anti-icing.
Description
Technical Field
The invention relates to the technical field of coating materials, in particular to a preparation method of an anti-icing super-hydrophobic surface with a micro-nano scale step structure.
Background
A superhydrophobic surface refers to a surface having a contact angle greater than 150 deg., a contact angle hysteresis, or a roll angle less than 10 deg.. The low surface energy and the suitable roughness structure are the key to the preparation of superhydrophobic surfaces. The biological surface in nature has a unique micro-nano scale step structure and an exclamatory infiltration characteristic, and can be used for coping with severe environments. The bionic super-hydrophobic surface has excellent hydrophobicity, so that the surface of the material is not easy to be soaked by water drops, and the water drops are easy to roll off from the surface after colliding with the surface of the material in a bead shape, thereby reducing the accumulation of the water drops on the surface of the material. In addition, the contact area between the liquid drop and the solid surface is greatly reduced due to the super-hydrophobicity of the surface, and an air cushion is formed by the air pocket existing in the micro-nano scale step structure. The air cushion can be used as a thermal barrier to greatly reduce and delay the heat transfer from liquid drops to the surface of a cold solid, and is favorable for improving the anti-icing and anti-frosting performance of the surface of the material.
In order to prepare the bionic super-hydrophobic surface, researchers have developed various preparation methods, but the methods are complex in process and high in cost, and the prepared super-hydrophobic surface with the micro-nano scale step structure is low in chemical stability and poor in durability, so that the large-scale use of the super-hydrophobic surface in practical production is limited.
Disclosure of Invention
Aiming at the problems, the invention aims to provide a method for preparing an anti-icing super-hydrophobic surface with a micro-nano scale step structure, so as to solve the problems of complex preparation process, high cost, low chemical stability and the like of a bionic super-hydrophobic surface.
The technical scheme adopted by the invention is as follows:
the invention provides a method for preparing an anti-icing super-hydrophobic surface with a micro-nano scale step structure, which specifically comprises the following steps:
s1, selecting a metal substrate material, pretreating the metal substrate material, and ultrasonically cleaning the metal substrate material by using acetone, absolute ethyl alcohol and deionized water to remove oil stains and impurities on the surface and ensure that the surface is clean and pollution-free;
s2, constructing a micron-scale structure on the surface of the metal substrate material in an etching mode;
s3, adopting silane organic compound to react with SiO 2 Modifying nano particles to obtain hydrophobic SiO 2 A nanoparticle solution;
s4, preparing SiO-containing material by adopting silane coupling agent 2 Sol of nanoparticles, cross-linking agent and hydrophobic SiO 2 Mixing the nano-particle solution to obtain chemically modified SiO 2 Sol;
s5, chemically modifying the chemically modified SiO 2 The sol is uniformly coated on the surface of the micron-scale structure, and the surface of the micro-nano scale step structure is constructed.
Further, in the step S1, the metal base material is brass, 1060 aluminum alloy, stainless steel, 6061 aluminum alloy, or pure copper.
Further, in the step S2, the etching manner is chemical reagent etching, laser etching or plasma etching.
Further, the chemical reagent is an acid solution or an alkali solution or a beck reagent.
Further, in the step S3, a silane compound is used for chemical modification, specifically tetraethoxysilane, heptadecafluorodecyl triethoxysilane, or trimethylethoxysilane.
Further, in the step S4, the silane coupling agent is methyltriethoxysilane or vinyltriethoxysilane.
Further, in the step S5, the chemically modified SiO 2 The sol is uniformly coated on the surface of the micron-scale structure by adopting a spraying method or a spin-coating method.
Compared with the prior art, the invention has the following beneficial effects:
the preparation method provided by the invention is simple in process, controllable in appearance and super-hydrophobic, and the super-hydrophobic surface of the micro-nano scale step structure is in a low-temperature humid environmentStill has good anti-icing performance and anti-frosting performance. In addition, the prepared fluorine-free hydrophobic SiO 2 The nano particles effectively reduce the surface energy of the surface of the micron-scale structure, and the low-surface-energy material can be coated on the surface of the rough structure by adopting a spraying method or a spin-coating method, so that the bionic super-hydrophobic surface is expected to be prepared on a large scale, and the application prospect is wide.
Drawings
FIG. 1 is a schematic diagram of the static contact angle of the superhydrophobic surface prepared in example 1 of the present invention;
fig. 2 is a SEM schematic view of a surface of the micro/nano-scale stepped structure in embodiment 1 of the present invention;
FIG. 3 is an AFM schematic view of a surface of a micro/nano-scale step structure in embodiment 1 of the present invention;
FIG. 4 is a schematic view of a liquid drop condensation image of the superhydrophobic surface prepared in example 1 of the invention at-15 ℃.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
The invention provides a method for preparing an anti-icing super-hydrophobic surface with a micro-nano scale step structure, which specifically comprises the following steps:
example 1
A preparation method of an anti-icing super-hydrophobic surface with a micro-nano scale step structure specifically comprises the following steps:
s1, selecting brass as a metal substrate material; performing surface pretreatment on brass, and ultrasonically cleaning the brass by adopting acetone, absolute ethyl alcohol and deionized water to ensure that the surface is clean and reserved;
s2, constructing a micron-scale structure; placing a clean brass sheet with the specification of 30mm multiplied by 20mm multiplied by 1mm in 5mol/L hydrofluoric acid solution for 10min, then placing the clean brass sheet in 2mol/L hydrochloric acid solution for 60min, washing the clean brass sheet with deionized water to remove impurities, and drying the clean brass sheet for later use;
s3, chemically modifying SiO 2 A nanoparticle; 1.2g of SiO 2 Dispersing the nano particles in 50mL of absolute ethyl alcohol, and magnetically stirring for 30min; then slowly dropwise adding trimethylethoxysilane, and continuously magnetically stirring for 90min to obtain modified SiO 2 A nanoparticle suspension;
s4, preparing SiO-containing material by using methyl triethoxysilane as silane coupling agent 2 A sol of nanoparticles; chemically modified SiO 2 Mixing the nano-particle suspension with a cross-linking agent to obtain chemically modified SiO 2 Sol;
s5, adopting a spray gun to chemically modify the chemically modified SiO 2 And spraying the sol on the surface of the micron-scale structure to construct the surface of the micro-nano-scale step structure.
Example 2
A preparation method of an anti-icing super-hydrophobic surface with a micro-nano scale step structure specifically comprises the following steps:
s1, selecting 1060 aluminum alloy as a metal base material; performing surface pretreatment on the 1060 aluminum alloy sheet, and ultrasonically cleaning the 1060 aluminum alloy sheet by using acetone, absolute ethyl alcohol and deionized water to ensure that the surface is clean for later use;
s2, constructing a micron-scale structure; placing clean 1060 aluminum alloy sheet with specification of 30mm × 20mm × 1mm in 5mol/L hydrofluoric acid solution for 10min, then placing in 2mol/L hydrochloric acid solution for 60min, washing with deionized water to remove impurities, and drying for later use;
s3, chemically modifying SiO 2 A nanoparticle; 1.2g of SiO 2 Dispersing the nano particles in 50mL of absolute ethyl alcohol, and magnetically stirring for 30min; then slowly dropwise adding trimethylethoxysilane, and continuously magnetically stirring for 90min to obtain modified SiO 2 A nanoparticle suspension;
s4, preparing SiO-containing material by using methyl triethoxysilane as silane coupling agent 2 A sol of nanoparticles; chemically modified SiO 2 Mixing the nano-particle suspension with a cross-linking agent to obtain chemically modified SiO 2 Sol;
s5, chemically modified SiO is subjected to spin coating 2 And coating the nano particles on the surface of the micron-scale structure to construct the surface of the micro-nano scale step structure.
Example 3
A preparation method of an anti-icing super-hydrophobic surface with a micro-nano scale step structure specifically comprises the following steps:
s1, selecting brass as a metal substrate material; performing surface pretreatment on brass, and ultrasonically cleaning the brass by adopting acetone, absolute ethyl alcohol and deionized water to ensure that the surface is clean and reserved;
s2, constructing a micron-scale structure; placing a clean brass sheet with the specification of 30mm × 20mm × 1mm in a Beck reagent (a mixed solution consisting of 20mL of HCl (37 wt.%), 6.25mL of deionized water and 1.25mL of LHF (40 wt.%)) for etching for 60min, washing with deionized water to remove impurities, and drying for later use;
s3, chemically modifying SiO 2 A nanoparticle; 1.2g of SiO 2 Dispersing the nano particles in 50mL of absolute ethyl alcohol, and magnetically stirring for 30min; then slowly dropwise adding heptadecafluorodecyl triethoxysilane, and continuously magnetically stirring for 90min to obtain modified SiO 2 A nanoparticle suspension;
s4, preparing SiO-containing material by using methyl triethoxysilane as silane coupling agent 2 A sol of nanoparticles. Chemically modified SiO 2 Mixing the nano-particle suspension with a cross-linking agent to obtain chemically modified SiO 2 Sol;
s5, adopting a spray gun to chemically modify the chemically modified SiO 2 And spraying the sol on the surface of the micron-scale structure to construct the surface of the micro-nano-scale step structure.
Example 4
A preparation method of an anti-icing super-hydrophobic surface with a micro-nano scale step structure specifically comprises the following steps:
s1, selecting 6061 aluminum alloy as a metal substrate material; surface pretreatment is carried out on a 6061 aluminum alloy sheet, acetone, absolute ethyl alcohol and deionized water are adopted for ultrasonic cleaning, and the surface is guaranteed to be clean for later use;
s2, constructing a micron-scale structure; etching the surface of a clean 6061 aluminum alloy sheet with the specification of 30mm multiplied by 20mm multiplied by 1mm by adopting laser etching equipment to obtain a micrometer scale structure surface;
s3, chemically modifying SiO 2 A nanoparticle; 1.2g of SiO 2 Dispersing the nano particles in 50mL of absolute ethyl alcohol, and magnetically stirring for 30min; then slowly dropwise adding heptadecafluorodecyl triethoxysilane, and continuously magnetically stirring for 90min to obtain modified SiO 2 A nanoparticle suspension;
s4, preparing SiO-containing material by using methyl triethoxysilane as silane coupling agent 2 A sol of nanoparticles; chemically modified SiO 2 Mixing the nano-particle suspension with a cross-linking agent to obtain chemically modified SiO 2 Sol;
s5, adopting a spray gun to chemically modify the chemically modified SiO 2 And spraying the sol on the surface of the micron-scale structure to construct the surface of the micro-nano-scale step structure.
Example 5
Preparation method of super-hydrophobic surface with micro-nano scale step structure for anti-icing
S1, selecting pure copper as a metal substrate material; carrying out surface pretreatment on the pure copper sheet, and ultrasonically cleaning the pure copper sheet by adopting acetone, absolute ethyl alcohol and deionized water to ensure that the surface is clean for later use;
s2, constructing a micron-scale structure; placing a clean brass sheet with the specification of 30mm multiplied by 20mm multiplied by 1mm in 5mol/L hydrofluoric acid solution for 10min, then placing the clean brass sheet in 2mol/L hydrochloric acid solution for 60min, washing the clean brass sheet with deionized water to remove impurities, and drying the clean brass sheet for later use;
s3, chemically modifying SiO 2 A nanoparticle; 1.2g of SiO 2 Dispersing the nano particles in 50mL of absolute ethyl alcohol, and magnetically stirring for 30min; then tetraethoxysilane is slowly dripped, and the magnetic stirring is continued for 90min to obtain the modified SiO 2 A nanoparticle suspension;
s4, preparing SiO-containing silicon dioxide by using methyl triethoxysilane as silane coupling agent 2 A sol of nanoparticles; chemically modified SiO 2 Mixing the nanoparticle suspension with a crosslinking agent to obtainChemically modified SiO 2 Sol;
s5, chemically modified SiO is subjected to spin-coating 2 And coating the nano particles on the surface of the micron-scale structure to construct the surface of the micro-nano scale stepped structure.
Example 6
A preparation method of an anti-icing super-hydrophobic surface with a micro-nano scale step structure specifically comprises the following steps:
s1, selecting 1060 aluminum alloy as a metal base material; carrying out surface pretreatment on 1060 aluminum alloy sheets; ultrasonically cleaning by adopting acetone, absolute ethyl alcohol and deionized water to ensure that the surface is clean for later use;
s2, constructing a micron-scale structure; placing clean 1060 aluminum alloy sheets with the specification of 30mm × 20mm × 1mm in a beck reagent (a mixed solution consisting of 20mL of HCl (37 wt.%), 6.25mL of deionized water and 1.25mL of HF (40 wt.%)) for etching for 30min, washing with deionized water to remove impurities, and drying for later use;
s3, chemically modifying SiO 2 A nanoparticle; 1.2g of SiO 2 Dispersing the nano particles in 50mL of absolute ethyl alcohol, and magnetically stirring for 30min; then tetraethoxysilane is slowly dripped, and the magnetic stirring is continued for 90min to obtain the modified SiO 2 A nanoparticle suspension;
s4, preparing SiO-containing material by using methyl triethoxysilane as silane coupling agent 2 A sol of nanoparticles; chemically modified SiO 2 Mixing the nano-particle suspension with a cross-linking agent to obtain chemically modified SiO 2 Sol;
s5, adopting a spray gun to chemically modify the chemically modified SiO 2 And spraying the sol on the surface of the micron-scale structure to construct the surface of the micro-nano-scale step structure.
Example 7
A preparation method of an anti-icing super-hydrophobic surface with a micro-nano scale step structure specifically comprises the following steps:
s1, selecting pure copper as a metal substrate material; carrying out surface pretreatment on the pure copper sheet, and ultrasonically cleaning the pure copper sheet by adopting acetone, absolute ethyl alcohol and deionized water to ensure that the surface is clean for later use;
s2, constructing a micron-scale structure; etching a clean pure copper sheet with the specification of 30mm multiplied by 20mm multiplied by 1mm by adopting laser etching equipment to obtain a brass surface with a micron scale structure;
s3, chemically modifying SiO 2 A nanoparticle; 1.2g of SiO 2 Dispersing the nano particles in 50mL of absolute ethyl alcohol, and magnetically stirring for 30min; then slowly dropwise adding trimethylethoxysilane, and continuously magnetically stirring for 50min to obtain modified SiO 2 A nanoparticle suspension;
s4, preparing SiO-containing material by using vinyl triethoxysilane as silane coupling agent 2 A sol of nanoparticles; chemically modified SiO 2 Mixing the nano-particle suspension with a cross-linking agent to obtain chemically modified SiO 2 Sol;
s5, adopting a spray gun to chemically modify the chemically modified SiO 2 The sol is sprayed on the surface of the micron-scale structure to construct the surface of the micron/nanometer-scale step structure.
Example 8
A preparation method of an anti-icing super-hydrophobic surface with a micro-nano scale step structure specifically comprises the following steps:
s1, selecting stainless steel as a metal substrate material; performing surface pretreatment on the stainless steel sheet, and ultrasonically cleaning the stainless steel sheet by adopting acetone, absolute ethyl alcohol and deionized water to ensure that the surface is clean for later use;
s2, constructing a micron-scale structure; placing a clean stainless steel sheet with the specification of 30mm × 20mm × 1mm in a beck reagent (a mixed solution consisting of 20mL of HCl (37 wt.%), 6.25mL of deionized water and 1.25mL of HF (40 wt.%)) for etching for 60min, cleaning with deionized water to remove impurities, and drying for later use;
s3, chemically modifying SiO 2 A nanoparticle; 1.2g of SiO 2 Dispersing the nano particles in 50mL of absolute ethyl alcohol, and magnetically stirring for 30min; then slowly dropwise adding trimethylethoxysilane, and continuously magnetically stirring for 50min to obtain modified SiO 2 A nanoparticle suspension;
s4, preparing SiO-containing material by using vinyl triethoxysilane as silane coupling agent 2 A sol of nanoparticles; chemically modified SiO 2 Mixing the nano-particle suspension with a cross-linking agent to obtain chemically modified SiO 2 Sol;
s5, adopting a spray gun to chemically modify the chemically modified SiO 2 And spraying the sol on the surface of the micron-scale structure to construct the surface of the micro-nano-scale step structure.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (7)
1. A preparation method of an anti-icing super-hydrophobic surface with a micro-nano scale step structure is characterized by comprising the following steps:
s1, selecting a metal substrate material, pretreating the metal substrate material, and ultrasonically cleaning the metal substrate material by using acetone, absolute ethyl alcohol and deionized water to remove oil stains and impurities on the surface and ensure that the surface is clean and pollution-free;
s2, constructing a micron-scale structure on the surface of the metal substrate material in an etching mode;
s3, adopting silane organic compound to react with SiO 2 Modifying nano particles to obtain hydrophobic SiO 2 A nanoparticle solution;
s4, preparing SiO-containing material by adopting silane coupling agent 2 Sol of nanoparticles, coupling agent with hydrophobic SiO 2 Mixing the nano-particle solution to obtain chemically modified SiO 2 Sol;
s5, chemically modifying the chemically modified SiO 2 And (3) uniformly coating the sol on the surface of the micron-scale structure to construct the surface of the micro-nano-scale step structure.
2. The method for preparing the super-hydrophobic surface with the micro-nano scale step structure for anti-icing according to claim 1, wherein the method comprises the following steps: in the step S1, the metal substrate is made of brass, 1060 aluminum alloy, stainless steel, 6061 aluminum alloy, or pure copper.
3. The method for preparing the super-hydrophobic surface with the micro-nano scale step structure for ice prevention according to claim 1, characterized in that: in the step S2, the etching mode is chemical reagent etching, laser etching or plasma etching.
4. The method for preparing the super-hydrophobic surface with the micro-nano scale step structure for anti-icing according to claim 3, wherein the method comprises the following steps: the chemical reagent is acid solution or alkali solution or Becker reagent.
5. The method for preparing the super-hydrophobic surface with the micro-nano scale step structure for anti-icing according to claim 1, wherein the method comprises the following steps: in the step S3, a silane compound is adopted for chemical modification, and specifically tetraethoxysilane, heptadecafluorodecyl triethoxysilane or trimethylethoxysilane is adopted.
6. The method for preparing the super-hydrophobic surface with the micro-nano scale step structure for anti-icing according to claim 1, wherein the method comprises the following steps: in the step S4, the silane coupling agent is methyltriethoxysilane or vinyltriethoxysilane.
7. The method for preparing the super-hydrophobic surface with the micro-nano scale step structure for anti-icing according to claim 1, wherein the method comprises the following steps: in the step S5, the chemically modified SiO 2 The sol is uniformly coated on the surface of the micron-scale structure by adopting a spraying method or a spin-coating method.
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| CN116116685A (en) * | 2023-03-02 | 2023-05-16 | 华北电力大学（保定） | Preparation method of ordered micron structure reinforced super-hydrophobic anti-icing coating |
| CN115922092A (en) * | 2023-03-15 | 2023-04-07 | 中国科学院长春光学精密机械与物理研究所 | Ant-crypt-shaped super-hydrophobic surface and preparation method thereof |
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