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A kind of preparation method of aluminum and aluminum alloy superhydrophobic surface

A super-hydrophobic surface, aluminum alloy surface technology, applied in the direction of metal material coating process, coating, liquid chemical plating, etc., can solve the problems of high equipment conditions and costs, high preparation process conditions, low preparation efficiency, etc., to achieve The effect of short time, simple conditions and equipment, and high preparation efficiency

Active Publication Date: 2019-01-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN101007304 discloses the use of a two-step method to corrode aluminum and aluminum alloys in a solution containing nitric acid and metal salts (copper salts or nickel salts) for 0.5-20 minutes, and then soak and modify them with silane (12-14 h) to obtain A superhydrophobic surface with a maximum contact angle of 165°, but this method of chemical corrosion and immersion modification takes too long to prepare, the preparation efficiency is relatively low, and the nitric acid in the mixed solution is highly corrosive
Patent CN104911599A discloses a method of preparing aluminum alloy superhydrophobic surface by laser etching and high temperature oxidation (100-250°C, 2-8 h), but this method is only suitable for regular aluminum alloy plates, and the used The equipment condition and cost are high, and the preparation time is long, which is not conducive to large-scale production
In order to simplify the preparation process of the superhydrophobic surface and make the surface roughening and low surface energy of the aluminum alloy proceed simultaneously, the patent CN2012101423432 discloses a one-step soaking treatment method for the superhydrophobic surface of the aluminum alloy. In the mixed solution of acid and ethanol (temperature 30-70°C, soaking time 5-25 minutes), take it out and put it in a box-type electric furnace for curing (temperature 50-90°C, time 30-90min) to obtain a super-hydrophobic surface, although the preparation process Simplified, but the preparation process conditions for this one-step immersion to obtain a super-hydrophobic surface are relatively high, and the overall preparation cycle is longer

Method used

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  • A kind of preparation method of aluminum and aluminum alloy superhydrophobic surface
  • A kind of preparation method of aluminum and aluminum alloy superhydrophobic surface
  • A kind of preparation method of aluminum and aluminum alloy superhydrophobic surface

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Embodiment 1

[0018] This embodiment provides a method for preparing an aluminum alloy superhydrophobic surface, which specifically includes the following steps:

[0019] (1) Preparation of mixed solution: CuCl 2 Dissolve in a mixed solvent of water and absolute ethanol (volume ratio of water and absolute ethanol 1:2) to obtain mixed solution A, CuCl in mixed solution A 2 The concentration of n-dodecanethiol is 0.2mol / L, and then 0.6ml of n-dodecanethiol is dropped into 60ml of mixed solution A and mixed fully to obtain mixed solution B. 1% .

[0020] (2) Pre-treatment: Use 600# SiC sandpaper to remove the oxide layer and oil stains on the surface of the aluminum alloy (brand 6061), then put it in 99% acetone and 99% ethanol for 10 minutes, take it out and dry it quickly.

[0021] (3) One-step rapid chemical deposition and modification: put the treated aluminum alloy in the mixed solution for 10 seconds, take it out, soak it in absolute ethanol, take it out and dry it quickly, so as to ob...

Embodiment 2

[0023] This embodiment provides a method for preparing an aluminum alloy superhydrophobic surface, which specifically includes the following steps:

[0024] (1) Preparation of mixed solution: CuCl 2 Dissolve in a mixed solvent of water and absolute ethanol (volume ratio of water and absolute ethanol 1:2) to obtain mixed solution A, CuCl in mixed solution A 2 The concentration of n-dodecanethiol is 0.25 mol / L, then drop 0.48ml of n-dodecanethiol into 60ml of mixed solution A and mix thoroughly to obtain mixed solution B. The amount of n-dodecanethiol added is 0.8% of the volume of mixed solution A %.

[0025] (2) Pre-treatment: Use 600# SiC sandpaper to remove the oxide layer and oil stains on the surface of the aluminum alloy (brand 6061), then put it in 99% acetone and 99% ethanol for 5 minutes, take it out and dry it quickly.

[0026] (3) Rapid chemical deposition and modification: put the pretreated aluminum alloy in the mixed solution for 5 s, take it out, soak it in abs...

Embodiment 3

[0028] This embodiment provides a method for preparing a metal aluminum superhydrophobic surface, which specifically includes the following steps:

[0029] (1) Preparation of mixed solution: CuCl 2 Dissolve in a mixed solvent of water and absolute ethanol (volume ratio of water and absolute ethanol 1:2) to obtain mixed solution A, CuCl in mixed solution A 2 The concentration of n-dodecanethiol is 0.23 mol / L, then drop 0.72ml of n-dodecanethiol into 60ml of mixed solution A and mix well to obtain mixed solution B, the addition of n-dodecanethiol is 1.2% of the volume of mixed solution A %.

[0030] (2) Pre-treatment: Use 800#SiC sandpaper to remove the oxide layer and oil stains on the surface of the pure aluminum sheet, then put it in 99% acetone and 99% ethanol for 10 minutes, take it out and dry it quickly.

[0031] (3) One-step rapid chemical deposition and modification: put the treated aluminum sheet in the mixed solution for 5 s, take it out, soak it in absolute ethanol...

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Abstract

The invention discloses a preparation method for the super-hydrophobic surface of aluminum or aluminum alloy and belongs to the field of metal surface treatment. According to the preparation method, the low-surface-energy super-hydrophobic surface of a dendritic crystal micro-nano composite structure is constructed on the surface of the aluminum or the aluminum alloy through a one-step chemical deposition and modification preparation technique. Compared with an ordinary step-by-step method (including the steps of chemical deposition or chemical etching and modification), the preparation method for the super-hydrophobic surface of the aluminum or the aluminum alloy has the advantages that the preparation time is short, the preparation efficiency is high, pollution is avoided, conditions and equipment are simple, cost is low, and large-scale production is facilitated.

Description

technical field [0001] The invention relates to a method for preparing superhydrophobic surfaces of aluminum and aluminum alloys, belonging to the field of metal surface treatment. Background technique [0002] Aluminum and its alloys have the characteristics of low density, high strength, and good electrical and thermal conductivity. They are widely used in construction, transportation, aviation, machinery manufacturing, and home appliances. For example: the cooling fins of the indoor evaporator and outdoor condenser of the air conditioner and some of their conduits are made of aluminum-based materials, the high-voltage transmission cables are made of aluminum stranded wires, and the blades of some aeroengines are made of aluminum alloy. The aluminum or aluminum alloys used in these occasions are prone to condensed water, icing, and frosting in winter, which may cause indoor power outages, air-conditioning leaks, refrigeration and heating failures, etc. Accidents such as p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/38
CPCC23C18/1637C23C18/1646C23C18/38
Inventor 朱艳王力黎振华贺胤
Owner KUNMING UNIV OF SCI & TECH