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Long-acting drag reduction coating and preparation method and application of long-acting drag reduction coating

A coating, long-term technology, applied in the field of materials, can solve the problems of limited preparation area and high cost, achieve excellent drag reduction performance and solve the effect of instability

Active Publication Date: 2017-06-09
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] CN103754819A discloses a method for preparing a flexible MEMS drag-reducing skin, which achieves drag reduction by preparing a micro-pit array skin, but has problems such as high cost and limited preparation area

Method used

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  • Long-acting drag reduction coating and preparation method and application of long-acting drag reduction coating
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  • Long-acting drag reduction coating and preparation method and application of long-acting drag reduction coating

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preparation example Construction

[0034] Another aspect of the present invention also discloses a preparation method of a long-lasting drag-reducing coating, comprising:

[0035] (1) Immerse the nano-zinc oxide film in a treatment solution containing organosilane for modification, and obtain a coating with lipophilic and hydrophobic properties on the surface of the nano-zinc oxide film;

[0036] (2) The modified nano-zinc oxide film is immersed in the molten long-chain alkane liquid, and self-assembled to obtain a long-term drag-reducing coating.

[0037] Specifically, in this case, a wire mesh was selected as the substrate, and the amphiphilic (oleophilic / hydrophilic) zinc oxide film was first prepared on the wire mesh by chemical vapor deposition technology, and then the zinc oxide film was coated with polydimethylsiloxane (PDMS). The film is modified to make it have oleophilic and hydrophobic monophilic properties. Finally, the PDMS modified zinc oxide is treated with oil (such as n-octadecane and other lon...

Embodiment 1

[0039] Example 1: The drag-reducing coating with temperature-controllable resistance is made of polydimethylsiloxane-modified zinc oxide film substrate, the surface is dip-coated with n-octadecane and other long-chain alkanes that are solid at room temperature and their mixture oils composition.

[0040] The preparation process of the drag-reducing coating with resistance temperature controllability is carried out according to the following steps:

[0041] (1) Hydrothermal method prepares zinc oxide thin film, the preparation method of zinc oxide thin film is (in 100ml solution meter): take by weighing 2.949g zinc nitrate and be dissolved in 95ml deionized water, add 0.10698g ammonium chloride, 0.6004g urea, 5ml of ammonia water, then put it into a wire mesh, control the reaction temperature to 90°C, and the reaction time is 3h, to obtain a zinc oxide film with a certain particle size and thickness;

[0042] (2) Polydimethylsiloxane modified zinc oxide film, the polydimethyls...

Embodiment 2

[0047] Example 2: The drag-reducing coating with temperature-controllable resistance is made of polydimethylsiloxane-modified zinc oxide film substrate, and the surface is dip-coated with n-octadecane and other long-chain alkanes that are solid at room temperature and their mixtures. composition.

[0048] The preparation process of the drag-reducing coating with resistance temperature controllability is carried out according to the following steps:

[0049] (1) Hydrothermal method prepares zinc oxide thin film, the preparation method of zinc oxide thin film is (in 100ml solution meter): take by weighing 2.949g zinc nitrate and be dissolved in 95ml deionized water, add 0.10698g ammonium chloride, 0.6004g urea, 5ml of ammonia water, then put it into a wire mesh, control the reaction temperature to 80°C, and the reaction time is 1h, to obtain a zinc oxide film with a certain particle size and thickness;

[0050] (2) Polydimethylsiloxane modified zinc oxide film, the polydimethyl...

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Abstract

The invention discloses a long-acting drag reduction coating and a preparation method and application of the long-acting drag reduction coating. The coating comprises a zinc oxide film layer and a long chain alkane layer adhered to the surface of the zinc oxide film layer. According to the method, an amphiphilic (lipophilic / hydrophilic) zinc oxide film is prepared on a wire mesh through a chemical vapor deposition technology, then the zinc oxide film is modified with polydimethylsiloxane and is made to have the oleophilic hydrophobic single characteristic, finally oil immersion treatment is conducted on the PDMS-modified zinc oxide, and thus the long-acting drag reduction coating is obtained. By the adoption of the drag reduction coating, the drag reduction effect can be changed by controlling the temperature, the problem that a super-hydrophobic drag reduction technology fails under the high-speed high-pressure condition is solved effectively, and the implementation manner of the coating is that the drag reduction effect on a high-speed high-water-pressure shipping body is played by converting the solid-gas-water interface into the solid-oil-water interface. The drag reduction coating formed through the method still has the drag reduction effect after being immersed in water for a long time, and the performance of the drag reduction coating is obviously superior to that of a super-hydrophobic drag reduction material.

Description

technical field [0001] The invention belongs to the technical field of materials, in particular to a long-acting drag-reducing coating and a preparation method thereof. Background technique [0002] Improving fuel utilization efficiency and reducing energy consumption are problems faced by countries all over the world. Drag reduction technology improves the efficiency of unit energy from the aspect of reducing the resistance of the moving body. Taking the marine industry as an example, the operating speed and energy consumption rate of underwater vehicles are important indicators for evaluating their performance. The operating speed determines the performance of the vehicle, while the energy consumption rate determines the endurance and operating costs of the vehicle. The energy consumption rate of the aircraft body is not only related to the engine efficiency, but also the driving resistance of the aircraft body in seawater is also the main influencing factor. Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/12B05D5/08
CPCB05D5/08C23C18/1216C23C18/125
Inventor 刘二勇曾志翔赵文杰薛群基王立平
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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