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Duplicating method for making scaliness biological epidermis morphology duplicating template by pulse electroforming method

A pulse electroforming and skinning technology, applied in electroforming, affecting the air flow flowing through the surface of the aircraft, electrolytic process, etc., can solve the problems of low forming efficiency, low drag reduction efficiency, high cost, etc., and achieve the improvement of mechanical properties and the source of Extensive, hardness and strength-enhancing effects

Inactive Publication Date: 2009-07-22
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

US Patents: 4753401, 4930729, 4863121, 5386955, and 5606201 respectively disclose the preparation method of the imitation shark drag-reducing skin formed by the profiling process. The poor fidelity of the skin and the low drag reduction efficiency directly limit the engineering application of the bionic drag reduction skin

Method used

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  • Duplicating method for making scaliness biological epidermis morphology duplicating template by pulse electroforming method
  • Duplicating method for making scaliness biological epidermis morphology duplicating template by pulse electroforming method
  • Duplicating method for making scaliness biological epidermis morphology duplicating template by pulse electroforming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1: Making Wide Mouth Sharkskin Copper Replica Templates

[0040] Step 1: Making a sample of scaly biological epidermis

[0041] (A) Commercially available real shark skin was used as a biological sample. First, fresh shark skin of 50×50mm was cut from the side of the fish body, the subcutaneous tissue was removed and washed repeatedly with distilled water for 3 times; then the washed real shorttail shark skin was chemically fixed in 2.5% glutaraldehyde solution for 6 hours, and the temperature was fixed chemically. 4°C, to prepare the skin of the fixed sample;

[0042] (B) After washing the fixed sample epidermis prepared by step (A) with deionized water for 4 times, put it into a 50% ethanol solution for dehydration for 30 minutes, a 75% ethanol solution for 30 minutes, and a concentration of 95% ethanol solution for 30 minutes. Dehydration in 100% ethanol solution for 30 minutes and dehydration in 100% ethanol solution for 30 minutes to obtain dehydrated s...

Embodiment 2

[0064] Example 2: Making a Nickel Copy Template for Little Snout Sailfish Skin

[0065] Step 1: Making a sample of scaly biological epidermis

[0066] (A) Cut the skin of the purchased small snout four-fin swordfish 40 × 40mm and wash it 6 times with deionized water, then chemically fix the washed original organism epidermis in 2.5% glutaraldehyde solution for 8 hours, The temperature is 2°C, and the skin of the fixed sample is prepared;

[0067] (B) After cleaning the fixed sample epidermis prepared by step (A) with deionized water for 4 times, put it into a 50% ethanol solution for dehydration for 20 minutes, a 75% ethanol solution for 20 minutes, and a concentration of 95% ethanol solution for 20 minutes. Dehydration in 100% ethanol solution for 20 minutes and dehydration in 100% ethanol solution for 20 minutes to obtain dehydrated sample epidermis;

[0068] (C) drying the dehydrated sample epidermis prepared in step (B) at 50° C. for 10 h to obtain a scaly biological e...

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Abstract

The invention discloses a copy method for preparing a copying template of scaly biological scarfskin appearance by a pulse electroforming method. The copying method comprises the steps as follows: firstly, biological scarfskin is prepared as a biological scarfskin dry sample; subsequently, magnetic-controlled sputtering deposition of a metal conductive layer is carried out; and finally, the copying template is prepared by the pulse electroforming. The copying template prepared by the copying method can be used for composite turnover template to prepare bionic resistance-reducing skin, and can be directly used for copying the bionic resistance-reducing surface on the internal wall surface of various pipelines in an imprinting way; and the bionic resistance-reducing surface has more than 90% of the fidelity of the original biological scarfskin, and can effectively reduce the resistance of the pipe wall and improve the conveying capability of the pipeline.

Description

technical field [0001] The invention relates to a process for replicating the appearance of scaly organisms epidermis, more particularly, a method for preparing a replica template for directly replicating the appearance of scaly organisms epidermis by means of pulse electroforming. Background technique [0002] Under the background that energy saving and consumption reduction have already become the common and urgent needs of today's society, reducing the resistance between the pipe wall surface of various pipelines and the conveying medium to improve the pipeline conveying capacity and save the energy consumption of pipeline conveying is of great importance to the national economy and National defense security is of great significance. Many creatures in nature, especially those with scaly skin, such as tuna, shark, sturgeon, sailfish or swordfish. Due to the special structure of its surface, it has a good drag reduction effect, which provides us with a good drag reduction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D1/10B63B1/34B64C21/10
CPCY02T70/121Y02T70/10
Inventor 张德远韩鑫连志阳李元月李翔
Owner BEIHANG UNIV
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