Preparation method of super-hydrophobic aluminum surface with freezing prevention performance

A super-hydrophobic, aluminum surface technology, which is applied to the device for coating liquid on the surface, special surface, pre-treated surface, etc., can solve the problems of complicated process, limited substrate, high cost investment, etc. The method is simple and easy, The effect of weak surface adhesion and reduction of production cost

Inactive Publication Date: 2018-04-13
JIANGSU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of limited matrix, high cost and investment, and complicated processes in the preparation of superhydrophobic aluminum surfaces in the prior art, the present invention provides a method for preparing superhydrophobic aluminum surfaces with anti-icing properties

Method used

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  • Preparation method of super-hydrophobic aluminum surface with freezing prevention performance
  • Preparation method of super-hydrophobic aluminum surface with freezing prevention performance

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Polish the aluminum substrate with a size of 20*20*2mm with 7000-grit sandpaper for 1min, then perform ultrasonic cleaning, and dry it in a drying oven to remove the oxide layer on the surface;

[0019] Preparation of surface micro-nano structure: put the pretreated aluminum base into 2.9mol / L hydrochloric acid solution, place the aluminum base in the solution for etching for 45 minutes at room temperature, then ultrasonically clean and dry in a drying oven;

[0020] Reducing the surface energy: Put the etched aluminum base into the prepared 0.5mol / L stearic acid absolute ethanol solution, modify the aluminum base in a water bath at 53°C for 1 hour, and then place it in a drying oven at 110 After drying and curing for 30 minutes at ℃, the treated aluminum substrate was subjected to a drip test by a contact angle measuring instrument, and the contact angle of static water droplets on the surface of the aluminum substrate was measured. The results are as follows: figure 1...

Embodiment 2

[0022] Polish the aluminum substrate with a size of 20*20*2mm with 7000-grit sandpaper for 0.5min, then perform ultrasonic cleaning, and dry it in a drying oven to remove the oxide layer on the surface;

[0023] Prepare the surface micro-nano structure: put the pretreated aluminum base into 2.9mol / L hydrochloric acid solution, place the aluminum base in the solution for etching for 40 minutes at room temperature, then ultrasonically clean and dry in a drying oven;

[0024] Reduce the surface energy: put the etched aluminum base into the prepared 0.1mol / L stearic acid absolute ethanol solution, modify the aluminum base in a water bath at 55°C for 1.5 hours, and then place it in a drying oven at 110 Dry and solidify at ℃ for 30 minutes. The treated aluminum substrate is subjected to a drop test with a contact angle measuring instrument to measure the contact angle of static water droplets on the surface of the aluminum substrate. The contact angle of water droplets on the surface...

Embodiment 3

[0026] Polish the aluminum substrate with a size of 20*20*2mm with 5000-grit sandpaper for 1.5min, then perform ultrasonic cleaning, and dry it in a drying oven to remove the oxide layer on the surface;

[0027] Prepare the surface micro-nano structure: put the pretreated aluminum base into 2.3mol / L hydrochloric acid solution, place the aluminum base in the solution for 60 minutes etching at room temperature, then ultrasonically clean and dry in a drying oven;

[0028] Reduce surface energy: Put the etched aluminum base into the prepared 0.5mol / L stearic acid absolute ethanol solution, modify the aluminum base in a water bath at 50°C for 1 hour, and then place it in a drying oven at 110 After drying and curing at ℃ for 30 minutes, the treated aluminum substrate was subjected to a drop test using a contact angle measuring instrument to measure the contact angle of static water droplets on the surface of the aluminum substrate. The contact angle of water droplets on the surface o...

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Abstract

The invention discloses a preparation method of a super-hydrophobic aluminum surface with a freezing prevention performance. The method comprises the following steps: firstly, an abrasive paper is used for polishing a pure aluminum surface to remove oil stains and an oxide layer on an aluminum base surface; then, hydrochloric acid solution is adopted to etch the aluminum base surface to etch out arough structure on the aluminum surface; and finally, stearic acid anhydrous ethanol solution is used for processing to reduce the aluminum base surface energy to obtain the super-hydrophobic aluminum surface. Reagents adopted by the preparation method are common reagents and easy to prepare; such laboratory common devices as ultrasonic cleaners, electronic scales, drying boxes, water bath stirrers and the like are only needed; the method is simple and feasible; the production cost is greatly reduced; the average contact angle of the prepared aluminum base surface is more than 150 degrees; the surface adhesion is weak; water drops are easy to roll down from the surface; the excellent freezing prevention performance is achieved; and the unexpected technical effects are achieved.

Description

technical field [0001] The invention belongs to the technical field of functional materials, in particular to a method for preparing a superhydrophobic aluminum surface with anti-icing performance. Background technique [0002] Aluminum and aluminum alloys are used in many aspects of life and production because of their good ductility, electrical conductivity, light weight, etc. However, with the development of society, people have increasingly stringent requirements for the surface of aluminum and other materials. For example, power transmission lines are easily covered by snow and ice in winter, and the current treatment method is time-consuming and labor-intensive; oil transportation pipelines will rust after a long time, which will cause problems in oil transportation ; The glass of high-rise buildings has been exposed to wind and sun for a long time and needs to be cleaned. At present, there are more manual cleaning, but it is more dangerous; and so on. With the conti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/14B05D5/00B05D3/12B05D3/10B05D3/02C23F1/20
CPCB05D3/0254B05D3/102B05D3/12B05D5/00B05D7/14B05D2202/25B05D2401/60C23F1/20
Inventor 叶霞姚爱斐黄超刘群超顾江
Owner JIANGSU UNIV OF TECH
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