CN113005489A - Super-hydrophobic aluminum alloy surface preparation method - Google Patents
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Abstract
The invention discloses a preparation method of a super-hydrophobic aluminum alloy surface, which comprises the following steps: step 1: placing an aluminum alloy sheet in an electrodeposited metal nickel precursor, adding a hydrophobic substance in the electrodeposition process, and applying direct current to the aluminum alloy sheet to form a composite layer of metal and corresponding metal oxide with the thickness of 5-25 mu m on the aluminum alloy sheet; step 2: and placing the aluminum alloy sheet with the generated metal and metal oxide composite layer into a mixed solution containing graphene oxide, a polymer with amino or hydroxyl and a reducing agent, and reducing and drying the graphene oxide to obtain the aluminum alloy with the surface modified by the three-dimensional network-shaped composite. The aluminum alloy surface of the invention has the functions of self-cleaning, corrosion resistance and freezing resistance.
Description
Technical Field
The invention relates to the technical field of aluminum alloy surface treatment, in particular to a preparation method of a super-hydrophobic aluminum alloy surface.
Background
The aluminum alloy is used as an engineering material with wide application, and has a prominent importance in the industries of aviation, ships, automobiles, construction, electric power and the like, and self-cleaning, corrosion resistance, ice coating prevention and the like in the fields are all engineering problems to be solved urgently, and are closely related to the surface/interface characteristics of the material. By surface modification, a metal alloy layer or a non-metal protective layer is formed on the surface, and the corrosion of the medium can be effectively prevented. In the course of hundreds of millions of years of evolution and development in nature, biological surfaces have formed a plurality of unique and smart structures, so that each species has the specific environmental adaptability. The excellent hydrophobic and self-cleaning performances of the lotus leaf effect are mainly caused by countless micron-sized mastoid structures distributed on the surface and nanoparticles attached to the micron-sized mastoid structures. The structure is beneficial to increasing the trapping amount of air, and an air film layer is formed on the surface of the blade, so that the adhesion of dirt such as dust is greatly reduced; the drop of dewdrops to be dropped on the rose petals is due to the high adhesion hydrophobic property of the surface. Inspired by the surface characteristics of the natural organism, the surface micro-nano preparation becomes a research hotspot in the interdisciplinary field, and the material or the part is endowed with new functional characteristics by changing the action behavior of the surface/interface, so that the method is also widely concerned by researchers. At present, problems of poor controllability, complex operation, low efficiency and the like generally exist in micro-nano structure preparation, and obvious defects exist in the aspects of theoretical design and controllable preparation of the micro-nano structure.
The three-dimensional network composite material is a novel composite material formed by winding and penetrating components in a three-dimensional space, a matrix and a reinforcing phase are continuous and mutually penetrated in the three-dimensional space, stress which is dispersed among the phases can be well transmitted and prevented from expanding, the mechanical property of the composite material is further improved, and the types of the reinforcing phase and the matrix, and the form and the performance of an interface have important influence on the performance of the three-dimensional continuous network structure composite material. Compared with the traditional composite material, the novel composite material has better mechanical property and wear resistance, and has wide application prospect in the fields of aerospace, automobiles and the like. The Graphene Aerogel (GAs) has the unique structures and excellent performances of graphene and aerogel, and is filled with a GAs medium, so that the graphene aerogel has the greatest characteristics of low density, high porosity and large specific surface area. In addition, GAs can possess more and richer structures through a self-assembly process, such as unidirectional ordered structures, bidirectional ordered structures and the like. The properties of the porous solid are determined by the inherent properties, density and pore geometry of the solid phase, so that GAs are endowed with higher surface utilization rate and stronger operability besides inherent good hydrophobicity, electrical conductivity, mechanical strength and structural stability, and meanwhile, the GAs present various performance characteristics along with the change of the structure, thereby having development prospects in practical application. However, the conventional adhesion mainly uses a surface coating technique, so that the hydrophobic property is not ideal and there is a problem of the bonding force between GA and the coating. Therefore, there is still a need to develop a method for preparing a superhydrophobic aluminum surface with low cost and simple preparation process.
Disclosure of Invention
The invention aims to provide a preparation method of a super-hydrophobic aluminum alloy surface, and the aluminum alloy surface has the functions of self-cleaning, corrosion resistance and freezing resistance.
In order to achieve the purpose, the preparation method of the super-hydrophobic aluminum alloy surface is characterized by comprising the following steps:
step 1: placing an aluminum alloy sheet in an electrodeposited metal nickel precursor, and adding a hydrophobic substance in the electrodeposition process to increase the surface hydrophobicity of the aluminum alloy sheet; simultaneously, applying direct current to the aluminum alloy sheet for electrodeposition, and forming a compact metal and corresponding metal oxide composite layer (nickel and nickel hydroxide composite layer) with the thickness of 5-25 mu m on the aluminum alloy sheet (cathode aluminum alloy sheet);
step 2: and placing the aluminum alloy sheet with the generated metal and metal oxide composite layer into a mixed solution containing graphene oxide, a polymer with amino or hydroxyl and a reducing agent, and reducing and drying the graphene oxide to obtain the aluminum alloy with the microstructure of the surface modification of the three-dimensional network-shaped composite (forming a graphene layer after reduction and coating the graphene layer on the surface of the aluminum alloy).
In the technical scheme, the polymer with amino or hydroxyl is used for increasing the binding force and protecting the graphene coating on the surface.
In the step 2 of the technical scheme, the reaction temperature of the aluminum alloy sheet and the mixed solution is 25-40 ℃, the reaction time is 2-10 hours, the drying mode is room temperature drying or 60 ℃ oven drying or freeze drying or ultraviolet lamp drying, different drying methods are researched, the influence on the surface structure of the aluminum alloy sheet is avoided, and the phenomena of bubbles, peeling, poor adhesion and the like on the surface are avoided.
In step 2 of the above technical scheme, the polymer with amino or hydroxyl is octadecylamine, polyaniline (molecular weight of 726), dextran (molecular weight of 504), or chitosan (molecular weight of 1526), and the mass ratio range of the addition amount of the polymer with amino or hydroxyl to the graphene oxide is polymer: graphene 1: 1-1: 10, and researching the influence of the addition of the polymer on the surface structure and hydrophobicity of the polymer to obtain the composite material with excellent surface hydrophobicity.
In the step 2 of the technical scheme, the reducing agent is ascorbic acid, in the step 2, 0.05-0.1 g of ascorbic acid is added as a reducing reagent of graphene oxide, and the reducing agent is added to reduce part of the graphene oxide into graphene, so that the optimal ratio is sought by controlling the adding amount of the reducing agent and controlling the ratio of the graphene oxide to the graphene, and the graphene can be tightly combined with other high molecules and has good hydrophobicity.
In the step 1 of the technical scheme, the current density of the applied direct current is 0.05-1A/cm2The electrodeposition time is controlled to be 10-1000 s, the volume of the solution for electrodeposition is 10ml, the thickness of the aluminum alloy sheet is 0.02-3 mm, the length and the width of the aluminum alloy sheet are 0.5cm, and the influence of different electrodeposition thicknesses on the surface hydrophobicity of the aluminum alloy sheet is researched, so that the aluminum alloy sheet has better hydrophobicity, antifreezing property and corrosion resistance under the condition of least electric energy consumption.
In the step 1 of the technical scheme, before electrodeposition, the aluminum alloy sheet is firstly polished by abrasive paper, and then the polished aluminum alloy sheet is subjected to ultrasonic treatment in absolute ethyl alcohol, 6mol/L HCl and deionized water in sequence to remove oil stains, oxide pollution layers and impurities on the surface.
In step 1 of the above technical scheme, the precursor of the metallic nickel is nickel chloride hexahydrate (NiCl)2·6H2O), nickel nitrate hexahydrate (Ni (NO)3)2·6H2O) or nickel sulfamate tetrahydrate (Ni (SO)3NH2)2·4H2O) with the use amount of 0.1-1M, researching the influence of different nickel sources on the electro-deposition metal/metal oxide structure, and controlling the microstructure of the nickel source to enable the surface of the nickel source to have the influence of excellent hydrophobicity.
In step 1 of the technical scheme, a buffer reagent is added to adjust the pH value in the electrodeposition process, wherein the buffer reagent is H3BO3Or NH4Cl, the dosage is 50mM to 2M.
In step 1 of the technical scheme, the hydrophobic substance is stearic acid or myristic acid, and the mass ratio of the nickel to the hydrophobic substance is controlled to be Ni2+: the hydrophobic substance is 1: 0.1-1: 1, and the influence of the addition of the hydrophobic substance on the surface hydrophobicity of the hydrophobic substance is researched, so that the hydrophobicity of the hydrophobic substance can be increased, and the adverse effects of large electricity consumption, poor adhesion force and the like caused by the addition of excessive hydrophobic substance are avoided.
In the step 2 of the technical scheme, the concentration of the graphene oxide solution is 1 mg/ml-4 mg/ml, the volume of the solution is 1ml, and the influence of the concentration of the graphene on the surface structure, thickness, adhesive force and the like of the graphene oxide solution is researched, so that the surface of the graphene oxide solution has excellent hydrophobicity.
The invention also discloses application of the preparation method of the super-hydrophobic aluminum alloy surface in preparation of self-cleaning, corrosion-resistant, freezing and electro-catalytic hydrogen evolution.
The invention has the beneficial effects that:
1. the invention deposits a metal layer of a composite layer of nickel and nickel hydroxide with a nano/micron structure on the surface by a simple electrodeposition method, and the nickel hydroxide cooperate with each other to protect the surface of the alloy from contacting the outside air.
2. According to the method, the hydrophobic stearic acid or myristic acid is added in the electrodeposition process to synthesize the hydrophobic surface in one step, and the two positions are used as surface modifiers to modify the metal layer (adsorb some surfactants and are used for adsorption and deposition of graphene).
3. According to the invention, secondary protection is carried out on the periphery of the primary protection layer at room temperature, the alloy layer and the metal layer are protected, and then the surface is coated with the gel of the three-dimensional network graphene and the polymer, so that the graphene-polymer gel has the dual advantages of the graphene and the polymer and is rigid and flexible.
4. Therefore, after the alloy surface is modified, the advantages are obtained, so that the surface has good self-cleaning, corrosion resistance and freezing resistance.
5. The preparation method is simple to operate, raw materials are easy to obtain, reaction conditions are easy to achieve, and the obtained product has a great industrial application prospect.
Drawings
FIG. 1 is an aluminum alloy; aluminum alloy, Ni and Ni (OH)2A complex; aluminium alloy, Ni (OH)2And a scan of the GA-CS complex (a precursor of graphene and chitosan).
FIG. 2 is an aluminum alloy; aluminum alloy, Ni and Ni (OH)2A complex; aluminium alloy, Ni (OH)2And impedance plots of the GA-CS complex.
FIG. 3 is an aluminum alloy; aluminum alloy, Ni and Ni (OH)2A complex; aluminium alloy, Ni (OH)2And XRD (X-ray diffraction) pattern of GA-glucan complex.
FIG. 4 is an aluminum alloy; ni, Ni (OH)2And LSV (linear sweep voltammetry) profile of GA-PAN complexes (precursors of graphene and polyaniline).
FIG. 5 is an aluminum alloy; aluminum alloy, Ni and Ni (OH)2A complex; aluminium alloy, Ni (OH)2And GA-octadecylamine complex, the static contact angle of a water drop and the contact angle after icing are shown schematically.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
example 1
Step 1: preparation of coral-like Ni and Ni (OH) on the surface of aluminum alloys by cathodic electrodeposition of a standard two-electrode system2The specific steps of the nano array are as follows: firstly, before the aluminum alloy is used, the aluminum alloy is subjected to ultrasonic treatment in absolute ethyl alcohol, 6mol/L HCl and deionized water for 30 minutes to remove oil stains, oxide pollution layers and impurities on the surface. Then, build upTwo-electrode reaction system. In a two-electrode system, the treated aluminum alloy (size 0.5cm by 0.5cm) was used as the working electrode, the Pt wire was used as the counter electrode, and 10mL of electrolyte contained 2mol NH4Cl and 0.1mol NiCl2·6H2And O. Subsequently, the whole electrodeposition reaction was carried out at room temperature at a constant current density of 1.0A cm-2Under the conditions of (1) for 300s to obtain an optimized aluminum alloy, Ni and Ni (OH)2And (c) a complex. Finally, after the electrodeposition is completed, the prepared sample is repeatedly washed in deionized water for several times;
step 2: weighing 0.1g of Chitosan (CS) and dispersing in 10ml of water solution, adding glacial acetic acid to enable the chitosan solution to be semitransparent, and preparing to obtain 10mg/ml of chitosan solution; weighing 0.4g of graphene solution, dispersing in 100ml of aqueous solution, and performing ultrasonic dispersion for 3 hours to prepare 4mg/ml of graphene solution; adding 1ml of chitosan solution into 25ml of graphene solution, fully stirring, adding 1mol of sodium hydroxide to adjust the pH value to 8, obtaining the precursor of graphene and chitosan, adding 1ml of graphene and chitosan solution into a small centrifuge tube, and adding Ni and Ni (OH)2Placing in aluminum alloy, reacting for 1h, aging for 1h, adding 0.02g ascorbic acid for reduction, reacting for 2h, and drying at room temperature to obtain aluminum alloy, Ni (OH)2And GA-CS complexes.
The prepared aluminum alloy with a simply treated surface is shown in FIG. 1, and can be seen from the figure that: the aluminum alloy after surface cleaning has a lot of gully-shaped structures, which means that the surface is easy to be damaged and needs surface protection. Surface electrodeposition of Ni and Ni (OH)2Then, it can be found that the surface is uniformly covered with a layer of protrusion-like substance, and the enlarged observation shows that the protrusion structures are microspheres combined and synthesized by nanospheres, and the microspheres have a large number of pores to form a nano/microstructure surface. After further coating GA-CS, the convex structure on the surface is completely covered, and the enlarged observation shows that the surface contains smaller protrusions and cavities, presents a three-dimensional structure, increases the roughness of the surface and is beneficial to improving the hydrophobic capability.
Electrochemical Impedance Spectroscopy (EIS): an important means for analyzing the electrochemical impedance of the material and testing the reason of the catalytic performance. EIS was tested at open circuit potential ranging from 100kHz to 0.01Hz with an amplitude of 5 mV.
FIG. 2 shows that the impedance test can find that the aluminum alloy, Ni (OH)2And the Rct value of GA-CS is obviously higher than that of aluminum alloy, which shows that the surface of the aluminum alloy with secondary protection has good corrosion resistance.
Example 2
Step 1: firstly, before the aluminum alloy is used, the aluminum alloy is subjected to ultrasonic treatment in absolute ethyl alcohol, 6mol/L HCl and deionized water for 30 minutes in sequence to remove oil stains, oxide pollution layers and impurities on the surface. A method of cathodic electrodeposition of a two-electrode system is adopted, wherein in the two-electrode system, aluminum alloy is used as a working electrode, and Pt wires are used as a counter electrode. The electrolyte contains 1.0mol of Ni (SO)3NH2)2·4H2O and 50mM H3BO3And the pH of the electrolyte was adjusted to 4.0 with concentrated sulfuric acid. The whole second-step electrodeposition reaction is carried out at room temperature and constant current density of-50 mA/cm-2Under the conditions of (1). After the second electrodeposition step, the sample was washed several times in deionized water to obtain aluminum alloy, Ni and Ni (OH)2And (c) a complex.
Step 2: weighing 0.2g of glucan, dispersing in 10ml of aqueous solution, and performing ultrasonic dispersion to prepare 20mg/ml glucan solution; weighing 0.2g of graphene solution, dispersing in 100ml of aqueous solution, and performing ultrasonic dispersion for 3 hours to prepare 2mg/ml of graphene solution; adding 1ml of chitosan solution into 10ml of graphene solution, fully stirring, adding 1M sodium hydroxide to adjust the pH value to 8, and obtaining gel of graphene and glucan; taking 1ml of graphene and dextran gel, placing the gel in a small centrifuge tube, and adding Ni and Ni (OH)2Placing the aluminum alloy composite in the solution, reacting for 1h, aging for 1h, adding 0.01g ascorbic acid for reduction, continuing to react for 2h, and drying at room temperature to obtain aluminum alloy, Ni and Ni (OH)2And a GA-glucan complex.
From FIG. 3, it can be seen that Ni and Ni (OH) are electroplated2The latter aluminum alloy showed three distinct diffraction peaks at 44.43 °, 51.80 ° and 76.21%(ii) corresponding to the 111, 200 and 220 crystal planes of metal Ni (JCPDS No.04-0850), respectively. Ni (OH)2May be masked. After the GA-glucan is coated, a characteristic absorption peak of graphene appears, which indicates that the material is successfully synthesized.
Electrochemical Impedance Spectroscopy (EIS): an important means for analyzing the electrochemical impedance of the material and testing the reason of the catalytic performance. EIS was tested at open circuit potential ranging from 100kHz to 0.01Hz with an amplitude of 5 mV.
The impedance test can find that the aluminum alloy, Ni and Ni (OH)2The Rct value of the GA-glucan compound is obviously higher than that of the aluminum alloy, which shows that the surface of the aluminum alloy with secondary protection has good corrosion resistance.
Example 3
Step 1: preparation of coral-like Ni and Ni (OH) on the surface of aluminum alloys by cathodic electrodeposition of a standard two-electrode system2The specific steps of the nano array are as follows: firstly, before the aluminum alloy is used, the aluminum alloy is subjected to ultrasonic treatment in absolute ethyl alcohol, 6mol/L HCl and deionized water for 30 minutes to remove oil stains, oxide pollution layers and impurities on the surface. Then, a two-electrode reaction system was set up. In a two-electrode system, 0.5cm by 0.5cm treated aluminum alloy was used as the working electrode, Pt wire was used as the counter electrode, and 10mL electrolyte contained 2M NH4Cl and 0.1M NiCl2·6H2And O. Subsequently, the whole electrodeposition reaction was carried out at room temperature at a constant current density of-1.0A/cm-2Under the conditions of (1) for 500s to obtain an optimized aluminum alloy, Ni and Ni (OH)2And (c) a complex. Finally, after the electrodeposition was completed, the prepared sample was repeatedly washed in deionized water several times.
Step 2: weighing 0.2g of Polyaniline (PAN) and dispersing in 10ml of aqueous solution, and performing ultrasonic dispersion to prepare polyaniline solution of 20 mg/ml; weighing 0.4g of graphene solution, dispersing in 100ml of aqueous solution, and performing ultrasonic dispersion for 3 hours to prepare 4mg/ml of graphene solution; adding 1ml of polyaniline solution into 10ml of polyaniline solution, fully stirring, adding 1M sodium hydroxide to adjust the pH value to 8, and obtaining graphene-polyaniline gel; taking 1ml of graphene and polyaniline solutionIn a small centrifugal tube, Ni and Ni (OH)2Placing the aluminum alloy composite in the solution, reacting for 1h, aging for 1h, adding 0.01g ascorbic acid for reduction, continuing to react for 2h, and drying at room temperature to obtain aluminum alloy, Ni and Ni (OH)2And GA-PAN complexes.
For aluminum alloy; aluminum alloy, Ni and Ni (OH)2A complex; aluminium alloy, Ni (OH)2And GA-PAN composites, all electrochemical tests were performed on the chenghua 760E electrochemical workstation in this work. During testing, a standard three-electrode system is adopted, a newly prepared electrode material is directly used as a working electrode, a graphite rod is used as a counter electrode, and a saturated calomel electrode is used as a reference electrode. The test temperature was 25 ℃ and the electrolyte was N during the test2Saturated 1m koh. In the test, all voltages were calibrated by equation (2-1), the voltage relative to the saturated calomel electrode was calibrated to the voltage relative to the standard hydrogen electrode:
E(RHE)＝E(SCE)+0.242+0.059pH (2-1)
linear voltammetric scan (LSV): the overpotential of the catalytic material under different current densities can be obtained through linear voltammetry scanning. When LSV test is carried out, the scanning speed is 2mV/s, the test result is automatically iR compensated by the instrument, and the compensation degree is 85%. FIG. 4 shows an aluminum alloy, Ni (OH)2And LSV of GA-PAN complex, from which it was found that the target sample can be used as an electrode for hydrogen production, notably, aluminum alloy, Ni/Ni (OH)2And the GA-PAN composite can be used as an electrode for producing hydrogen.
Example 4
Step 1: preparation of coral-like Ni and Ni (OH) on the surface of aluminum alloys by cathodic electrodeposition of a standard two-electrode system2The specific steps of the nano array are as follows: firstly, before the aluminum alloy is used, the aluminum alloy is subjected to ultrasonic treatment in absolute ethyl alcohol, 6mol/L HCl and deionized water for 30 minutes to remove oil stains, oxide pollution layers and impurities on the surface. Then, a two-electrode reaction system was set up. In a two-electrode system, 0.5cm x 0.5cm treated aluminum alloy was used as the working electrode, Pt wire was used as the counter electrode, and 10mL electrolyte was included in the solutionContaining 1M NH4Cl and 0.1M NiCl2·6H2And O. Subsequently, the whole electrodeposition reaction was carried out at room temperature at a constant current density of-1.0A cm-2Under the conditions of (1) for 1000s to obtain an optimized aluminum alloy/Ni (OH)2. Finally, after the electrodeposition is completed, the prepared sample is repeatedly washed in deionized water for several times;
step 2: weighing 0.2g of octadecylamine, dispersing in 10ml of aqueous solution, adding glacial acetic acid to enable the chitosan solution to be semitransparent, and preparing into 20mg/ml octadecylamine solution; weighing 0.4g of graphene solution, dispersing in 100ml of aqueous solution, and performing ultrasonic dispersion for 3 hours to prepare 4mg/ml of graphene solution; adding 1ml of octadecylamine solution into 25ml of graphene solution, fully stirring, adding 1M sodium hydroxide to adjust the pH value to 8, and thus obtaining gel of graphene and octadecylamine; taking 1ml of graphene and octadecylamine gel in a small centrifuge tube, and adding Ni and Ni (OH)2Placing the aluminum alloy composite in the solution, reacting for 1h, aging for 1h, adding 0.02g ascorbic acid for reduction, continuing to react for 2h, and drying at room temperature to obtain aluminum alloy, Ni and Ni (OH)2And GA-octadecylamine complex.
The icing test of the aluminum alloy surface is carried out at the temperature of-5 ℃. The operation of each experiment was as follows: placing the refrigeration table on an objective table of a contact angle measuring instrument so as to observe the icing condition of water drops through a computer, adjusting the temperature of the refrigeration table to the required temperature, taking aluminum alloy, placing the aluminum alloy on the refrigeration table, dropping a water drop with the volume of 4 mu L on the middle position of a sample, and recording the time for freezing the water drop.
From fig. 5, which is the static contact angle of a water drop, it can be seen that the contact angle of the sanded substrate 5052 aluminum alloy is about 20 °, and the wettability of the aluminum alloy surface is in a hydrophilic state. The prepared super-hydrophobic surface has excellent wettability, the contact angle can exceed 90 degrees, and the modified surface has good hydrophobicity and obviously enhanced icing time.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (10)
1. A preparation method of a super-hydrophobic aluminum alloy surface is characterized by comprising the following steps:
step 1: placing an aluminum alloy sheet in an electrodeposited metal nickel precursor, adding a hydrophobic substance in the electrodeposition process, and applying direct current to the aluminum alloy sheet to form a composite layer of metal and corresponding metal oxide on the aluminum alloy sheet;
step 2: and placing the aluminum alloy sheet with the generated metal and metal oxide composite layer into a mixed solution containing graphene oxide, a polymer with amino or hydroxyl and a reducing agent, and reducing and drying the graphene oxide to obtain the aluminum alloy with the surface modified by the three-dimensional network-shaped composite.
2. The method for preparing a superhydrophobic aluminum alloy surface according to claim 1, wherein: in the step 2, the polymer with amino or hydroxyl is octadecylamine, polyaniline, glucan or chitosan, and the mass ratio of the addition amount of the polymer with amino or hydroxyl to the graphene oxide is in the range of polymer: graphene 1: 1-1: 10.
3. The method for preparing a superhydrophobic aluminum alloy surface according to claim 1, wherein: the thickness range of the composite layer of the metal and the corresponding metal oxide in the step 1 is 5-25 μm, and the composite layer of the metal and the corresponding metal oxide is a nickel and nickel hydroxide composite layer;
the reducing agent in the step 2 is ascorbic acid.
4. The method for preparing a superhydrophobic aluminum alloy surface according to claim 1, wherein: the current density of the applied direct current is 0.05-1A/cm2The time of electrodeposition is controlled to be 10-1000 s, and the thickness of the aluminum alloy sheet is 0.02-3 mm.
5. The method for preparing a superhydrophobic aluminum alloy surface according to claim 1, wherein: before electrodeposition, the aluminum alloy sheet is firstly polished by abrasive paper, and then the polished aluminum alloy sheet is subjected to ultrasonic treatment in absolute ethyl alcohol, HCl and deionized water in sequence.
6. The method for preparing a superhydrophobic aluminum alloy surface according to claim 1, wherein: and the precursor of the metallic nickel in the step 1 is nickel chloride hexahydrate, nickel nitrate hexahydrate or nickel sulfamate tetrahydrate.
7. The method for preparing a superhydrophobic aluminum alloy surface according to claim 1, wherein: in the step 1, a buffer reagent is added to adjust the pH value in the electrodeposition process, and the buffer reagent is H3BO3Or NH4Cl。
8. The method for preparing a superhydrophobic aluminum alloy surface according to claim 1, wherein: in the step 1, the hydrophobic substance is stearic acid or myristic acid, and the mass ratio of nickel to the hydrophobic substance is controlled to be Ni2+: the hydrophobic substance is 1:0.1 to 1: 1.
9. The method for preparing a superhydrophobic aluminum alloy surface according to claim 1, wherein: in the step 2, the concentration of the graphene oxide solution is 1 mg/ml-4 mg/ml, and the volume of the solution is 1ml, wherein the solution is water or methanol.
10. Use of a method of preparing a superhydrophobic aluminum alloy surface of claim 1 in preparation of self-cleaning, corrosion-resistant, freeze-thaw resistant, and electro-catalytic hydrogen evolution.
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| CN103952732A (en) * | 2014-04-11 | 2014-07-30 | 华南理工大学 | Metal super-hydrophobic surface and preparation method thereof |
| CN105039975A (en) * | 2015-08-26 | 2015-11-11 | 吉林大学 | Preparing method for bionic super-hydrophobic graphene film with stainless steel substrate |
| US20150353385A1 (en) * | 2014-06-09 | 2015-12-10 | King Abdullah University Of Science And Technology | Hydrophobic photothermal membranes, devices including the hydrophobic photothermal membranes, and methods for solar desalination |
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| US20190144621A1 (en) * | 2017-11-15 | 2019-05-16 | Nanotek Instruments, Inc. | Graphene-Mediated Metal-Plated Polymer Article and Production Method |
| CN110644026A (en) * | 2019-10-30 | 2020-01-03 | 贵州民族大学 | Preparation method of super-hydrophobic aluminum alloy surface with self-repairing characteristic |
| CN110763377A (en) * | 2019-10-21 | 2020-02-07 | 华南理工大学 | Super-hydrophobic piezoresistive pressure sensor and preparation method and application thereof |
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| US20150353385A1 (en) * | 2014-06-09 | 2015-12-10 | King Abdullah University Of Science And Technology | Hydrophobic photothermal membranes, devices including the hydrophobic photothermal membranes, and methods for solar desalination |
| CN105039975A (en) * | 2015-08-26 | 2015-11-11 | 吉林大学 | Preparing method for bionic super-hydrophobic graphene film with stainless steel substrate |
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