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Method for copying sharkskin surface micro groove structure

A replication method and shark skin technology, applied in the field of biological restraint molding, can solve the problems of difficulty in demoulding, low replication accuracy of shield scales, etc., achieve the best drag reduction effect, and solve the effect of low replication accuracy

Inactive Publication Date: 2011-02-09
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in China, there are mainly two methods: direct hot pressing of fish skin and electroforming mold forming. The existing problems are difficulty in demoulding and low accuracy of replicating scute scales.

Method used

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  • Method for copying sharkskin surface micro groove structure
  • Method for copying sharkskin surface micro groove structure
  • Method for copying sharkskin surface micro groove structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Step 1 Shark Skin Pretreatment

[0022] Remove the muscles, tendons and other subcutaneous tissues on the back of the fish skin; use ethanol gradient solution to dehydrate twice, each time for 20 to 30 minutes; clamp the fish skin with two glass plates and put it in a drying box, at 45 °C Dry under the same conditions for 30 to 40 minutes to obtain a shark skin copy sample;

[0023] Step 2 Unsaturated resin pouring

[0024] Fix the shark skin sample on the bottom of the container, spray an appropriate amount of dry release agent on the surface of the sample; mix the unsaturated resin 191, accelerator, and curing agent uniformly in a mass ratio of 100:2.3:2.3, and then pour it into the container;

[0025] Step 3 Vacuum

[0026] Put the container in a vacuum desiccator to evacuate, stop vacuuming when the pressure reaches 10-20Pa, and keep the pressure for 10-20 minutes;

[0027] Step 4 unsaturated resin demoulding

[0028] The unsaturated resin and the fish skin samp...

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Abstract

The invention discloses a method for copying a sharkskin surface micro groove structure and belongs to the technical field of biological constraint molding. The method is characterized by comprising the following implementation steps: pretreating sharkskin; blowing mold release agent; pouring unsaturated resin; vacuumizing; releasing the unsaturated resin from a mold; blowing mold release agent; pouring liquid silicon rubber; vacuumizing; and releasing the liquid silicon rubber from a mold. The silicon rubber simulation sharkskin thin film obtained by the steps can copy the surface with a riblet micro groove structure of a shark completely and clearly and can be widely used in fields of resistance reduction in aircraft, ship and oil pipe projects and other projects.

Description

technical field [0001] The invention belongs to the technical field of bioconstrained molding, and in particular relates to a method for replicating a micro-groove structure on the surface of shark skin. Background technique [0002] With the spread of energy crisis worldwide, ship and aircraft drag reduction technology has become an effective means of saving energy. At present, many drag reduction methods have certain limitations in the actual application process. Groove drag reduction is more practical than other drag reduction methods, so it has become the focus and breakthrough of drag reduction technology research at home and abroad. Sharks in the ocean have undergone long-term evolution, and their surface scute scale groove structure has great potential for drag reduction. After research, it was found that its surface is covered with three-dimensional interlocking tiny groove structures (such as figure 1 shown). This structure changes the distribution of the flow f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/00B29C43/56B29C39/02
Inventor 赵丹阳王敏杰孙鹏翔
Owner DALIAN UNIV OF TECH
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