Super-hydrophobic surface with wave structure, applied to freezing prevention, and preparation method for same

A technology of super-hydrophobic surface and wave structure, which is applied in the field of surface treatment of metal substrates to achieve the effects of reducing solid-liquid contact time, high efficiency and easy operation

Inactive Publication Date: 2019-12-31
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the limitation that most of the existing super-hydrophobic surfaces are based on plane-based hydrophobic treatment, and provides a method for preparing a wave-structured super-hydrophobic surface for anti-icing

Method used

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  • Super-hydrophobic surface with wave structure, applied to freezing prevention, and preparation method for same

Examples

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Effect test

Embodiment 1

[0026] A method for preparing an anti-icing wave-structured superhydrophobic surface of the present embodiment comprises the following specific steps:

[0027] The first step is to select the base material, and process the wave structure on the base material by wire-cut finishing technology;

[0028] In this example, the selected base material is industrial pure copper with a purity greater than 99%. The wire cutting machine used for wire cutting finishing is DK7732E CNC fast-feeding wire cutting machine, and the dimensional processing accuracy is less than 0.015mm. The processed wave structure is a concave-convex semi-cylindrical structure with a diameter of 8mm. The structure is as follows: figure 1 shown.

[0029] The second step is to pretreat the wave structure obtained in the first step, and prepare a hydrophobic micron flower structure on the surface of the wave structure by wet etching;

[0030] First use 1mol / L dilute hydrochloric acid solution to etch and clean to...

Embodiment 2

[0034] A method for preparing an anti-icing wave-structured superhydrophobic surface of the present embodiment comprises the following specific steps:

[0035] The first step is to select the base material, and process the wave structure on the base material by wire-cut finishing technology;

[0036] In this example, the selected base material is industrial pure copper with a purity greater than 99%. The wire cutting machine used for wire cutting finishing is DK7732E CNC fast-feeding wire cutting machine, and the dimensional processing accuracy is less than 0.015mm. The processed wave structure is a concave-convex semi-cylindrical structure with a diameter of 15 mm.

[0037] The second step is to pretreat the wave structure obtained in the first step, and prepare a hydrophobic micron flower structure on the surface of the wave structure by wet etching;

[0038] First use 1mol / L dilute hydrochloric acid solution to etch and clean to remove the surface oxidation / hydroxide film...

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Abstract

A super-hydrophobic surface with a wave structure, applied to freezing prevention, and a preparation method for the same belong to the technical field of surface processing of metal base materials. The method comprises the steps that a base material is selected and the wave structure is processed on the base material through linear cutting and finish machining technologies; the prepared wave structure is preprocessed, and a hydrophobic micron flower-shaped structure is prepared on the surface of the wave structure through wet etching; and modification with a low-surface-energy substance is conducted on the hydrophobic micro flower-shaped structure, so the super-hydrophobic surface with the wave structure is prepared. The super-hydrophobic surface with the wave structure is an asymmetric surface; asymmetric bouncing is generated when drops hit the wave structure; and solid-liquid contact time of asymmetric bouncing is reduced by 40% in comparison with symmetric bouncing generated when the drops hit an equivalent super-hydrophobic plane. The super-hydrophobic surface with the wave structure provided by the invention has the beneficial effects that characteristics of contact between the metal base material and the water drops are improved; the micron flower-shaped structure modified by the substance with low surface energy can also reduce viscous force generated when the water drops slide over the surface and reduce the degree of condensation of the water drops on the base material surface; and a purpose of freezing prevention with high efficiency, high cleanliness and low cost can be realized.

Description

technical field [0001] The invention belongs to the technical field of surface treatment of metal substrates, and relates to a wave-structure super-hydrophobic surface for anti-icing and a preparation method thereof. Background technique [0002] In a low temperature environment, the surface of power transmission and communication lines, aviation, navigation or high-speed rail transportation equipment often freezes due to condensation of water vapor or the impact and accumulation of supercooled water droplets, which will bring great harm to the use of equipment and personal safety. For example, for high-voltage wires for long-distance power transmission, icing increases the load on the iron towers supporting the high-voltage wires. Severe icing made the tower unable to support the wires and collapsed. However, if the insulator strings on the iron tower are covered with ice, they can only switch on the power transmission line to stop the power transmission, thus causing a la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H7/02B23H9/00C23F1/34C23G1/10
CPCB23H7/02B23H9/00C23F1/34C23G1/103
Inventor 刘亚华王国洪刘聪詹海洋王歌卢晨光王昊韩立宝苏俊鹏
Owner DALIAN UNIV OF TECH
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