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Preparation method of super-hydrophobic bismuth coating

A super-hydrophobic and coating technology, which is applied in the direction of coating, metal material coating process, and device for coating liquid on the surface, etc., can solve the problems of expensive, unfavorable environment, environmental hazards, etc., and achieve green production and reduce emissions and environmental pollution, the effect of saving production costs

Active Publication Date: 2013-12-25
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there have been no reports of superhydrophobic bismuth coatings so far, and most of the existing preparations of metal superhydrophobic coatings require special processing equipment, complex processes, or produce a large amount of acid, which is not good for the environment.
In addition, the preparation of superhydrophobic surfaces often reduces the surface free energy by surface modification of fluorocarbons. Most of these fluorine-containing substances with low surface energy are toxic and expensive, and there is a certain potential harm to the environment.

Method used

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  • Preparation method of super-hydrophobic bismuth coating
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  • Preparation method of super-hydrophobic bismuth coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of superhydrophobic bismuth coating comprises the steps:

[0022] After the zinc flakes were cleaned by ultrasonic ethanol solvent, they were dried in the air and set aside. Add bismuth chloride to absolute ethanol, and obtain a 30mmol / L bismuth chloride ethanol solution by ultrasonic dispersion, then immerse the treated zinc sheet in the bismuth chloride ethanol solution, react at 25°C for 10min, take it out, and use After cleaning the surface with water and ethanol, dry it, then soak it in 20mmol / L stearic acid ethanol solution at room temperature for 30min, take it out, and obtain a superhydrophobic bismuth coating on the surface of the zinc sheet after drying.

[0023] attached figure 1 It is a surface topography diagram of the bismuth coating in Example 1 observed by a Hitachi S224800 scanning electron microscope (SEM). It can be seen from the figure that the bismuth coating has a dendrite-like micron structure, the trunk of the branch is a...

Embodiment 2

[0027] The preparation method of superhydrophobic bismuth coating comprises the steps:

[0028] After the zinc flakes were cleaned by ultrasonic ethanol solvent, they were dried in the air and set aside. Add bismuth nitrate to isopropanol, ultrasonically disperse to obtain 5mmol / L bismuth nitrate isopropanol solution, then immerse the treated zinc sheet in bismuth nitrate isopropanol solution, react at 60°C for 20min, take out with Clean the surface with absolute ethanol and dry it, then soak it in 30mmol / L stearic acid ethanol solution at room temperature for 35min, take it out, and obtain a superhydrophobic bismuth coating on the surface of the zinc sheet after drying.

Embodiment 3

[0030] The preparation method of superhydrophobic bismuth coating comprises the steps:

[0031] After the zinc flakes were cleaned by ultrasonic ethanol solvent, they were dried in the air and set aside. Add bismuth iodide into n-butanol, and obtain 15mmol / L bismuth iodide n-butanol solution by ultrasonic dispersion, then immerse the treated zinc sheet in bismuth iodide n-butanol solution, and react at 10°C for 60min Take it out, clean the surface with absolute ethanol and dry it, then soak it in 50mmol / L palmitic acid ethanol solution at room temperature for 15min, take it out, and get a superhydrophobic bismuth coating on the surface of the zinc sheet after drying.

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Abstract

The invention discloses a preparation method of a super-hydrophobic bismuth coating. Through a chemical plating technology, a bismuth micro-nano coating is plated on a zinc sheet, and the bismuth micro-nano coating is modified by long-chain fatty acid to form the super-hydrophobic bismuth coating having excellent performances. The preparation method has simple processes, can be operated easily, has good repeatability, is environmentally friendly and is suitable for super-hydrophobic coating large-scale production.

Description

technical field [0001] The invention relates to a preparation method of a superhydrophobic bismuth coating, which belongs to the technical field of functional materials and metal surface modification. Background technique [0002] Wettability is an important property of a solid surface, and the wettability of a solid surface is determined by its surface free energy and its surface roughness. The wettability of a solid surface is usually measured by the contact angle formed by water droplets on the surface. A surface with a contact angle of less than 90° is called a hydrophilic surface, and a surface with a contact angle greater than 90° is called a hydrophobic surface, and a surface with a contact angle greater than 150°, Surfaces with rolling angles less than 10° are called superhydrophobic surfaces. Superhydrophobic surfaces have attracted much attention due to their great potential applications in industry. In recent years, people have successfully prepared a series of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/52B05D7/24B05D5/08
Inventor 陈嵘苏春平杨浩赵慧平
Owner WUHAN INSTITUTE OF TECHNOLOGY
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