Shark intimating covering having self-lubricating groove and composite anti-drag function and manufacturing method thereof

A technology of imitating sharks and skins, applied in coatings and other directions, can solve the problems of increasing drag reduction rate, continuous addition, and high manufacturing cost, and achieve the effect of improving drag reduction rate.

Inactive Publication Date: 2009-02-25
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The traditional manufacturing process of the shark-like grooved drag-reducing surface has problems such as poor molding quality, low forming efficiency, high manufacturing cost, and poor functional effect. In addition, the drag reduction rate of the grooved drag-reducing surface can only reach about 8%. It is difficult to further increase the drag reduction rate by relying on grooves for

Method used

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  • Shark intimating covering having self-lubricating groove and composite anti-drag function and manufacturing method thereof
  • Shark intimating covering having self-lubricating groove and composite anti-drag function and manufacturing method thereof
  • Shark intimating covering having self-lubricating groove and composite anti-drag function and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Selection of raw materials: The silicone rubber is selected from RTV-2-7055 silicone rubber prepolymer and 25# curing agent produced by Shenzhen Weijia Silicone Co., Ltd., and the mixing ratio is 10:1. The water-based epoxy resin is selected from AB-EP-44 water-based epoxy resin emulsion and AB-HGF water-based epoxy resin curing agent produced by Zhejiang Anbang New Material Development Co., Ltd.

[0046] Step 1: Making the Female Mold

[0047] (A) Silicone rubber is evenly coated on the shark skin to form a female mold preform, and the thickness of the coated silicone rubber is 1.5mm;

[0048] (B) Put the female mold preform into the vacuum chamber and evacuate to 1.4×10 -4 MPa, keep it for 20 minutes and take it out; pressurize and cure for 240 minutes at a pressure of 5000Pa and a curing temperature of 30°C, and then demould to obtain a female mold with a shark skin appearance;

[0049] The vacuum chamber is the PZT-6020 intelligent vacuum drying oven produced by Sha...

Embodiment 2

[0064] Selection of raw materials: Silicone rubber is selected from RTV-2-7055 silicone rubber prepolymer and 25# curing agent produced by Shenzhen Weijia Silicone Co., Ltd., and the mixing ratio is 15:1. The water-based epoxy resin is selected from AB-EP-44 water-based epoxy resin emulsion and AB-HGF water-based epoxy resin curing agent produced by Zhejiang Anbang New Material Development Co., Ltd.

[0065] Step 1: Making the Female Mold

[0066] (A) Silicone rubber is evenly coated on the shark skin to form a female mold preform, and the thickness of the coated silicone rubber is 3mm;

[0067] (B) Put the female mold preform into the vacuum chamber and evacuate to 2×10 -4 MPa, keep it for 15 minutes and take it out; pressurize and cure for 150 minutes at a pressure of 3500Pa and a curing temperature of 22°C, and then demould to obtain a female mold with a shark skin appearance;

[0068] Step 2: Making Imitation Shark Skin

[0069] (A) uniformly coating the imitation shark...

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Abstract

The invention discloses an artificial shark skin with function of self-lubricating groove complex drag reduction. The artificial shark skin in a copying way is provided with micron-size grooves which have self-lubricating function. The artificial shark skin is made from waterborne epoxy resin and polyacrylamide aqueous solution, wherein 50-70g of the polyacrylamide aqueous solution is added to 10g of the waterborne epoxy resin; the waterborne epoxy resin consists of waterborne epoxy resin emulsion and waterborne epoxy resin curing agent and is a bi-component epoxy resin. The process for manufacturing the artificial shark skin fully proves that the drag reduction mechanism of the shark skin can be simulated from the two aspects of high-fidelity groove shape and self-lubricating mucus by the biological copy-forming technology, thus realizing double bionics of geometric attributes and interface attributes of low-resistance organism surface, which is to become the development trend of the bionic drag reduction surface manufacture technology in the future and has wide application prospect.

Description

technical field [0001] The invention relates to a shark-like skin and a manufacturing method thereof, more particularly, to a shark-like skin with self-lubricating groove composite drag-reducing functions made of hydrophilic materials and a manufacturing method thereof. Background technique [0002] Shark-like drag-reducing surface manufacturing technology with shark-like scale grooves and body surface mucus as the core content is one of the hot and difficult points of current research. [0003] Sharks known as the "shark skin effect" have evolved through continuous self-adaptation, self-learning and self-organization to meet their own survival needs and to reasonably regulate the external fluid medium. The non-smooth grooved drag-reducing surface. It relies on micron-scale scale grooves and mucus secretion to achieve high-speed cruising and fast maneuvering. For this reason, people have tried various means to imitate or reproduce the drag reduction effect of shark skin, bu...

Claims

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Application Information

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IPC IPC(8): C08L33/26C08L63/00C08K5/12C08J5/00B29C41/02B29C41/52B29C41/38B29C33/38
Inventor 张德远韩鑫李元月李翔
Owner BEIHANG UNIV
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