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Preparation method for constructing super-hydrophobic structure on surface of aluminum alloy

An aluminum alloy surface and superhydrophobic technology, which is applied in the field of preparation of superhydrophobic structures on the aluminum alloy surface, can solve the problems of high cost and difficult industrialization, and achieve good reproducibility, easy industrialization, and good industrial application prospects Effect

Inactive Publication Date: 2011-05-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these existing methods either use expensive materials such as fluorinated siloxane with extremely low surface energy, or require special processing equipment such as plasma processing equipment or complicated processes, so the cost is high and it is difficult to industrialize

Method used

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  • Preparation method for constructing super-hydrophobic structure on surface of aluminum alloy
  • Preparation method for constructing super-hydrophobic structure on surface of aluminum alloy
  • Preparation method for constructing super-hydrophobic structure on surface of aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] First, the aluminum alloy plate is mechanically polished and polished to remove surface defects and oxide films, and then cleaned with deionized water. 0.08mol / L oxalic acid solution and 1mol / L hydrochloric acid solution with a mass concentration of 3.7% were mixed in a volume ratio of 1:1 and fully stirred to form a mixed acid solution; then the aluminum alloy plate was immersed in the mixed acid solution for 15 hours, and then Take out the aluminum alloy plate and wash it thoroughly with deionized water, then immerse it in 0.5mol / L potassium permanganate solution for 1 hour, then wash it with deionized water, and dry it in a furnace at 100°C for 1 hour. The aluminum alloy superhydrophobic surface can be prepared by immersing in stearic acid ethanol solution with a mass fraction of 1% for 30 minutes, drying at room temperature and air for 24 hours at a relative humidity of 75%. Test the wettability of the coating surface with OCA20 contact angle tester, see figure 1 a...

Embodiment 2

[0020] First, the aluminum alloy plate is mechanically polished and polished to remove surface defects and oxide films, and then cleaned with deionized water. 0.08mol / L oxalic acid solution and 1mol / L hydrochloric acid solution with a mass concentration of 3.7% were mixed in a volume ratio of 1:1 and fully stirred to form a mixed acid solution; then the aluminum alloy plate was immersed in the mixed acid solution for 12 hours, and then Take out the aluminum alloy sheet and wash it thoroughly with deionized water, then immerse it in 0.5mol / L potassium permanganate solution for 2 hours, then wash it with deionized water, and dry it in a furnace at 80°C for 1.5 hours. The aluminum alloy superhydrophobic surface can be prepared by immersing in stearic acid ethanol solution with a mass fraction of 1% for 25 minutes, drying at room temperature and atmospheric environment at a relative humidity of 60% for 20 hours.

Embodiment 3

[0022] First, the aluminum alloy plate is mechanically polished and polished to remove surface defects and oxide films, and then cleaned with deionized water. 0.08mol / L oxalic acid solution and 1mol / L hydrochloric acid solution with a mass concentration of 3.7% were mixed in a volume ratio of 1:1 and fully stirred to form a mixed acid solution; then the aluminum alloy plate was immersed in the mixed acid solution for 14 hours, and then Take out the aluminum alloy sheet and wash it thoroughly with deionized water, then soak it in 0.5mol / L potassium permanganate solution for 1.5 hours, then wash it with deionized water, and dry it in a furnace at 100°C for 0.5 hours. The aluminum alloy superhydrophobic surface can be prepared by immersing in stearic acid ethanol solution with a mass fraction of 1% for 28 minutes, drying at room temperature and atmospheric environment at a relative humidity of 70% for 22 hours.

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Abstract

The invention discloses a method for preparing a super-hydrophobic aluminum alloy surface. The method comprises the following steps: (1) firstly carrying out mechanical grinding and polishing on an aluminum alloy plate, removing surface defects and an oxide film, and cleaning with deionized water; (2) mixing 0.08mol / L oxalic acid solution and 1mol / L hydrochloric acid solution with mass concentration of 3.7% according to based on the volume ratio of 1:1, fully stirring and preparing mixed acid solution; (3) immersing an aluminum alloy plate into the mixed acid solution for 12-18 hours, then taking out the aluminum alloy plate, fully cleaning with the deionized water, then immersing into 0.5mol / L potassium permanganate solution for soaking for 1-2 hours, then cleaning with the deionized water, and drying at the furnace temperature of 80-100 DEG C for 0.5-1.5 hours; and (4) soaking in stearic acid ethanol solution with mass fraction of 1% for 25-35 minutes, and drying in atmosphere environment with relative humidity of 60-75% and at room temperature for 20-28 hours, thus preparing the aluminum alloy super-hydrophobic surface. The operation process is simple, the controllability is good, the cost is low, the complicated chemical treatment is not required, expensive equipment is not required, and the method is easy for industrialization.

Description

technical field [0001] The invention relates to a preparation method for constructing a superhydrophobic structure on the surface of an aluminum alloy in an atmospheric environment at room temperature. Background technique [0002] Metals are widely used in various departments of military industry, national defense, shipbuilding, construction and national production because of their excellent electrical and thermal conductivity, certain strength and good processability. However, ordinary metals are easily corroded in humid or corrosive environments, which affects the service life of the material, causes it to not function normally, and brings many unsafe factors to users. In recent years, superhydrophobic surfaces (material surfaces with water contact angles greater than 150° and water droplets have small rolling angles on surfaces) have attracted extensive research interest. Since the contact area of ​​the liquid on the super-hydrophobic surface is very small, it can effec...

Claims

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Application Information

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IPC IPC(8): C23F1/20
Inventor 梁叔全吴若梅袁志庆陈洪官迪凯
Owner CENT SOUTH UNIV
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