Preparation method of ice coating prevention surface of bionic micro-nano composite structure

Abstract

The invention discloses an ice coating prevention surface of a bionic micro-nano composite structure and a preparation method thereof, and belongs to the technical fields of chemistry and materials. The preparation method comprises the steps of: processing a surface micro structure on the surface of a substrate, planting a nano structure on the surface micro structure and finishing the surface toobtain the ice coating prevention surface. The ice coating prevention surface has a micro-nano composite structure, thus the surface roughness of the material is greatly increased, the contact area between liquid drops and the surface of the substrate is reduced, and the surface of the substrate not only has hydrophobicity, but also has lower adhesion property; under the condition of -10 DEG C even -15 DEG C, the surface has hydrophobic and anti-icing effects, and the icing time is larger than 7200 seconds; and the ice coating prevention surface can be formed on multiple materials, thus the limit to low-temperature icing prevention of the materials is greatly widened.

Description

technical field

[0001] The invention belongs to the technical fields of chemistry and materials, and relates to a bionic micro-nano composite structure anti-icing surface and a preparation method thereof. Background technique

[0002] Icing is very common. Outdoor machinery, buildings, aircraft, ships, cables, towers and other facilities are covered with ice, causing equipment to malfunction and even causing major disasters. It is a worldwide problem. The freezing disaster in the south of my country in the winter of 2008, due to continuous snowfall and freezing rain, led to the accumulation of ice, crushed electric towers, transmission lines, cables, communication towers, interrupted power and communication; at the same time, residential buildings, land transportation and air operations are all It was seriously affected, causing casualties and huge economic losses. In areas where ice and snow disasters are frequent, such as Canada and the United States, special research inst...

Examples

Embodiment 1

[0048] Example 1: Stainless steel is used as the base material, the surface microstructure is bar-shaped helical teeth, and the nanostructure is ZnO nanowires. The preparation steps are as follows:

[0049] The first step is to process the surface microstructure on the surface of the substrate:

[0050] The strip-shaped helical tooth structure is processed on the surface of the stainless steel substrate by means of mechanical processing. Such as figure 1 As shown, wherein A is the main view, B is the left view, and C is the top view. The length of the base is 30.0mm, the width is 10.0mm, and the height is 1.5mm; The strip-shaped helical tooth structure is parallel to the width direction, the tooth spacing of the strip-shaped helical tooth structure is 200-400 μm, the height is 70-80 μm, and the inclination angle of the strip-shaped helical teeth is 25-30°. The scanning electron microscope picture of the surface micron structure is as follows Figure 2A , 2B , Figure 2A ...

Embodiment 2

[0065] The first step is the topography processing of the substrate surface:

[0066] The matrix helical tooth structure is processed on the surface of the base, and the base is made of pig iron material, such as Figure 5 As shown, the length of the base is 21.5mm, the width is 11.5mm, and the height is 3.0mm. The angle is 40-45°; the helical tooth period in the width direction is 0.4-1.0mm, and the inclination angle is 30-40°. The optical picture of the matrix helical tooth structure is as follows Figure 6A , 6B as shown, Figure 6A is the front view, Figure 6B It is a top view, and it can be seen from the figure that the surface of the substrate forms a matrix helical tooth structure surface with a micron structure.

[0067] In the second step, nanostructures are grown on the surface microstructures:

[0068] The same method as in Example 1 is used to plant ZnO nanowires on the surface microstructure surface, and the scanning electron microscope picture and planting...

technical field

[0001] The invention belongs to the technical fields of chemistry and materials, and relates to a bionic micro-nano composite structure anti-icing surface and a preparation method thereof. Background technique

[0002] Icing is very common. Outdoor machinery, buildings, aircraft, ships, cables, towers and other facilities are covered with ice, causing equipment to malfunction and even causing major disasters. It is a worldwide problem. The freezing disaster in the south of my country in the winter of 2008, due to continuous snowfall and freezing rain, led to the accumulation of ice, crushed electric towers, transmission lines, cables, communication towers, interrupted power and communication; at the same time, residential buildings, land transportation and air operations are all It was seriously affected, causing casualties and huge economic losses. In areas where ice and snow disasters are frequent, such as Canada and the United States, special research inst...

Examples

Embodiment 1

[0048] Example 1: Stainless steel is used as the base material, the surface microstructure is bar-shaped helical teeth, and the nanostructure is ZnO nanowires. The preparation steps are as follows:

[0049] The first step is to process the surface microstructure on the surface of the substrate:

[0050] The strip-shaped helical tooth structure is processed on the surface of the stainless steel substrate by means of mechanical processing. Such as figure 1 As shown, wherein A is the main view, B is the left view, and C is the top view. The length of the base is 30.0mm, the width is 10.0mm, and the height is 1.5mm; The strip-shaped helical tooth structure is parallel to the width direction, the tooth spacing of the strip-shaped helical tooth structure is 200-400 μm, the height is 70-80 μm, and the inclination angle of the strip-shaped helical teeth is 25-30°. The scanning electron microscope picture of the surface micron structure is as follows Figure 2A , 2B , Figure 2A ...

Embodiment 2

[0065] The first step is the topography processing of the substrate surface:

[0066] The matrix helical tooth structure is processed on the surface of the base, and the base is made of pig iron material, such as Figure 5 As shown, the length of the base is 21.5mm, the width is 11.5mm, and the height is 3.0mm. The angle is 40-45°; the helical tooth period in the width direction is 0.4-1.0mm, and the inclination angle is 30-40°. The optical picture of the matrix helical tooth structure is as follows Figure 6A , 6B as shown, Figure 6A is the front view, Figure 6B It is a top view, and it can be seen from the figure that the surface of the substrate forms a matrix helical tooth structure surface with a micron structure.

[0067] In the second step, nanostructures are grown on the surface microstructures:

[0068] The same method as in Example 1 is used to plant ZnO nanowires on the surface microstructure surface, and the scanning electron microscope picture and planting...

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