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Liquid one-direction spreading bionic surface texture

A surface texture and unidirectional technology, which is applied in the field of liquid unidirectional spreading biomimetic surface texture, can solve the problems of small amount of liquid transported and transported distance, only filamentary linear structure, and inability to expand the surface structure.

Active Publication Date: 2015-02-18
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing liquid direction transfer structure is relatively famous as a linear filamentary structure imitating the spider silk structure, which can realize liquid transfer in one direction, but the amount of liquid transferred and the transfer distance are very small, and can only be Filamentous linear structure, unable to expand to planar structure
Most of the systems or structures in practical applications are surface-oriented, so the linear structure has great limitations

Method used

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  • Liquid one-direction spreading bionic surface texture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Figure 3a It is a single oblique pore structure 1 on the surface of the nepenthes ostium consistent with the three-dimensional characteristics of the slanted pore structure on the ostium surface of Nepenthes, and a ridge 11 of the single slanted pore structure, and the height of the ridge is 10 μm. The outer contour 12 of a single inclined hole structure is a semi-ellipse, wherein the semi-ellipse has a major semi-axis length of 95 μm and a minor semi-axis length of 25 μm, and the angle between the plane where the outer contour is located and the plane perpendicular to the direction of the land is obliquely downward 8 °. The inner contour 13 of a single oblique hole structure is also semi-elliptical, wherein the semi-ellipse has a major semi-axis length of 120 μm and a minor semi-axis length of 25 μm. Down 10°. Figure 3c shows in detail the structure of a single slanted hole Figure 3b Profile information for the location shown. The wedge-shaped angle formed by th...

Embodiment 2

[0057] Figure 4a It is an arc-shaped simplified inclined pit 2 with an oblique hole structure on the mouth edge of Nepenthes. The inclined pit structure no longer has closed pore features, and it is an inclined pit structure formed vertically downward along the arc-shaped edge feature. Both sides of the land 21 of the arc-shaped simplified inclined pit are cuboid lands, the height of the land is 10 μm, and the width of the land is 5 μm. The outer contour 22 of the arc-shaped simplified inclined pit is a semi-ellipse, wherein the semi-ellipse has a major semi-axis length of 100 μm and a minor semi-axis length of 40 μm (perpendicular to the direction of the land). The included angle of the direction plane is 10° obliquely downward. Figure 4c detail showing the structure of a single arc-shaped inclined pit Figure 4b Profile information for the location shown. Wherein, the wedge-shaped included angle formed by the inner contour 23 of the arc-shaped simplified inclined pit wi...

Embodiment 3

[0061] Figure 5a It is a triangular simplified inclined pit 3 with oblique hole structure on the mouth edge of Nepenthes. The inclined pit structure no longer has closed pore features, and it is an inclined pit structure formed vertically downward along the triangular edge feature. Both sides of the land 31 of the triangular simplified inclined pit are cuboid lands, the height of the land is 10 μm, and the width of the land is 5 μm. The outer contour 32 of the triangular simplified inclined pit is a triangle, wherein the height of the triangle is 100 μm, and the length of the base is 40 μm (perpendicular to the direction of the land). 10°. Figure 5c detail showing the structure of a single triangular inclined pit Figure 5b Profile information for the location shown. The wedge-shaped included angle formed by the inner contour 33 of the triangular simplified inclined pit will produce a wedge effect, and the capillary wedge effect on the liquid will make the liquid spread a...

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Abstract

The invention discloses a liquid one-direction spreading bionic surface texture. According to the liquid one-direction spreading bionic surface texture, the function and the structure characteristics of one-direction spreading of a liquid on the surface on the mouth edge of common nepenthes are imitated, a linear or planar surface texture which is identical to or approximate to the structure of the surface of the mouth edge of the common nepenthes is processed on the surface, by virtue of a capillary wedge-shape effect generated from wedge-shape characteristics of a micro structure, the liquid is spread in one direction on the surface under the action of the capillary wedge-shape effect, and thus one-direction spreading of the liquid on the surface of the texture is achieved. Therefore, structures such as inclined holes, inclined pits and inclined grooves of which the three-dimensional characteristics are identical to or approximate to those of mouth edge inclined holes are processed on surfaces of systems or structures such as scalpels, cutters, micro electro mechanical systems, micro-fluid and biological chips, the liquid is enabled to spread and move in one direction on the surface texture by virtue of the capillary wedge-shape effect generated by the wedge-shape characteristics of the structures, and functions such as one-direction movement and one-direction lubrication of the liquid are achieved.

Description

technical field [0001] The present invention relates to a kind of bionic surface texture of unidirectional spreading of liquid, more specifically, it refers to a function and structure imitating the unidirectional spreading of liquid at the mouth margin of Nepenthes, relying on the wedge-shaped effect in capillary phenomenon to realize the unidirectional liquid The spread surface texture belongs to the technical field of micro-nano manufacturing. Background technique [0002] The surface that can make the liquid spread and move in one direction can realize the directional transportation of the liquid, the self-lubrication of the liquid, etc. This kind of surface can realize the corresponding transportation and lubrication functions only by the capillary force generated by the microstructure characteristics of the surface without external force intervention. These functions can be applied in many fields such as scalpel surface, knife surface, microfluidic surface, biochip su...

Claims

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Application Information

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IPC IPC(8): B81B1/00
Inventor 陈华伟张鹏飞张力文张德远
Owner BEIHANG UNIV
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