Drag reduction superhydrophobic coating and preparation method thereof

A technology of super-hydrophobic coating and absolute ethanol, which is applied in coatings, chemical instruments and methods, metal material coating technology, etc., can solve the problem that the convergence and accuracy need to be improved, the turbulent flow characteristics are not fully understood, and there is no Mathematical model and other issues, to achieve the effect of short operation process, simple preparation method, and reduce equipment energy consumption

Inactive Publication Date: 2012-06-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Designing the appearance of the hull through computer simulation has some shortcomings, because the flow characteristics such as turbulence have not been fully understood, and there is no universally applicable mathematical model at present. Secondly, the convergence and accuracy of numerical calculations also need to be improved
Using the microbubble method to reduce the frictional resistance of objects involves complex issues such as gas-liquid two-phase flow, boundary layer theory, and aerodynamics. A mature and complete system has not yet been formed.
There are great limitations in achieving drag reduction by changing the nature of the water body, and it is not suitable for industrial and military fields

Method used

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  • Drag reduction superhydrophobic coating and preparation method thereof
  • Drag reduction superhydrophobic coating and preparation method thereof
  • Drag reduction superhydrophobic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. The metal copper foil base is tightly coated on the surface of the submarine model, and the submarine model and the copper foil are bonded with a double-sided tape structure.

[0042] 2. Rinse the submarine model covered with metal copper foil with absolute ethanol for 1 min, and dry the surface with nitrogen at room temperature.

[0043] 3. Prepare the required chloroauric acid corrosion solution: the concentration of chloroauric acid in the corrosion solution is 5.0mmol / L.

[0044] 4. Immerse the submarine model covered with metal copper foil in the chloroauric acid corrosion solution, take it out after 0.5h of corrosion, rinse the surface with absolute ethanol for 1min, and dry at room temperature.

[0045] 5. The dried submarine model was placed in an atmosphere of n-dodecyl mercaptan, vapor deposition was carried out at normal temperature and pressure for 1 day, and the submarine model was taken out, and the surface was super-hydrophobic coating.

[0046] 6. Wate...

Embodiment 2

[0050] 1. The metal copper foil base is tightly coated on the surface of the submarine model, and the submarine model and the copper foil are bonded with a double-sided tape structure.

[0051] 2. Rinse the submarine model covered with metal copper foil with absolute ethanol for 1 min, and dry the surface with nitrogen at room temperature.

[0052] 3. Prepare the required chloroauric acid corrosion solution: the concentration of chloroauric acid in the corrosion solution is 7.5mmol / L.

[0053] 4. Immerse the submarine model covered with metal copper foil in the chloroauric acid corrosion solution, take it out after 0.5h of corrosion, rinse the surface with absolute ethanol for 1min, and dry at room temperature.

[0054] 5. The dried submarine model was placed in an atmosphere of n-dodecyl mercaptan, vapor deposition was carried out at normal temperature and pressure for 1 day, and the submarine model was taken out, and the surface was super-hydrophobic coating.

[0055] 6. Wa...

Embodiment 3

[0059] 1. The metal copper foil base is tightly coated on the surface of the submarine model, and the submarine model and the copper foil are bonded with a double-sided tape structure.

[0060] 2. Rinse the submarine model covered with metal copper foil with absolute ethanol for 1 min, and dry the surface with nitrogen at room temperature.

[0061] 3. Prepare the required chloroauric acid corrosion solution: the concentration of chloroauric acid in the corrosion solution is 10.0mmol / L.

[0062] 4. Immerse the submarine model covered with metal copper foil in the chloroauric acid corrosion solution, take it out after 0.5h of corrosion, rinse the surface with absolute ethanol for 1min, and dry at room temperature.

[0063] 5. The dried submarine model was placed in an atmosphere of n-dodecyl mercaptan, vapor deposition was carried out at normal temperature and pressure for 1 day, and the submarine model was taken out, and the surface was super-hydrophobic coating.

[0064] 6. W...

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Abstract

A drag reduction superhydrophobic coating and a preparation method thereof belong to the technical field of functional nanometer material application. A base of the drag reduction superhydrophobic coating adopts electroless metal deposition technique, a precious metal micro-nanometer binary grading composite structure is constructed on the base and decorated by a low surface energy material, a water static contact angle of the coating is larger than 150 degrees, and a rolling angle is smaller than 5 degrees. The drag reduction superhydrophobic coating is used for a model with motive power by itself, running speed of the model is obviously increased, and drag reduction rate is as high as 20%. The drag reduction superhydrophobic coating has good corrosivity resistance and can resist corrosion of strong acid and strong base solutions. The drag reduction superhydrophobic coating has repairability, and the preparation method can enable hydrophobicity of damaged areas to be rapidly recovered in a short period. The preparation method of the drag reduction superhydrophobic coating is simple, short in preparation period, and high in drag reduction rate.

Description

technical field [0001] The invention belongs to the technical field of application of functional nanometer materials, and mainly relates to a preparation method of a drag-reducing super-hydrophobic coating based on electroless metal deposition technology. The drag-reducing super-hydrophobic coating of the invention has good corrosion resistance and can resist corrosion by strong acid and strong alkali solution, and the invention has simple method, short production period and high drag reduction rate. Background technique [0002] In recent years, the research of functional nanomaterials—superhydrophobic materials has attracted extensive attention of scientists. A superhydrophobic surface refers to a surface whose contact angle with water is greater than 150° and the rolling angle is less than 10°. Theoretical research on superhydrophobic surfaces began in the 1950s and reached its peak in the 1990s. In 1997, German botanist wilhelm Barthlott conducted a series of experimen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/54C23C14/12C23C28/00B32B9/04B32B15/00
Inventor 石峰董红玉
Owner BEIJING UNIV OF CHEM TECH
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