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Method for preparing super hydrophobic film on surface of zinc substrate

A substrate surface, super-hydrophobic technology, used in devices for coating liquids on surfaces, special surfaces, pretreated surfaces, etc., can solve problems such as being unsuitable for large-scale production, and achieve increased micro-roughness, easy industrialization, and stability. Good results

Inactive Publication Date: 2012-04-11
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these existing methods require special processing equipment or complicated processes, so they are not suitable for large-scale production.

Method used

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  • Method for preparing super hydrophobic film on surface of zinc substrate
  • Method for preparing super hydrophobic film on surface of zinc substrate
  • Method for preparing super hydrophobic film on surface of zinc substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Clean 7 zinc sheets (1cm×1cm) with ethanol, acetone, and secondary water ultrasonically for 2-3 times, each time for 5-10 minutes; dry them with nitrogen for later use.

[0038] (2) Immerse the base of the zinc sheet in an aqueous solution of formamide with a volume fraction of 3-5%, place it in an oven, heat it at a constant temperature of 65°C for 10-30 hours, take it out, cool it to room temperature naturally, take out the zinc sheet, and use it twice After washing with water and ethanol and drying in air, nanorod arrays were obtained on the surface of the zinc sheet.

[0039] (3) Immerse the zinc flakes in an ethanol solution of stearic acid with a mass concentration of 1% for 4h, 8h, 12h, 16h, 20h, 24h, and 48h respectively; take out the substrate, wash it with absolute ethanol, and dry it , measured the surface contact angle; the results found that when the reaction time was 4h, the contact angle reached the maximum, which was 156.12°, and the rolling angle wa...

Embodiment 2

[0041] (1) Same as Example 1.

[0042] (2) Same as Example 1.

[0043] (3) Immerse the zinc flakes in ethanol solution of lauryl hydroxystearic acid with a mass fraction of 1%, soak for 4h, 8h, 12h, 16h, 20h, 24h, 48h respectively, take out the substrate, wash it with absolute ethanol, and let it dry After drying, its surface contact angle was measured; it was found that its hydrophobicity was the best when it was reacted for 16 hours (see Figure 4 a), the contact angle is 158.02°.

Embodiment 3

[0045] (1) Same as Example 1.

[0046] (2) Same as Example 1.

[0047] (3) Soak the zinc flakes in 0.5%, 1%, and 1.5% stearic acid ethanol solutions for 4 hours; take them out, wash them with absolute ethanol, and measure their surface contact angle after drying; the results show that when When the concentration of stearic acid ethanol solution is 1%, the contact angle is the largest: 156°.

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Abstract

The invention provides a method for preparing a super hydrophobic film on the surface of a zinc substrate, which belongs to the technical field of a functional material. The method comprises the following steps of: ultrasonically washing a zinc sheet substrate, blow-drying by nitrogen gas, oxidizing by formamide water solution, and forming a rod-like nanometer zinc oxide array on the surface of a zinc sheet; and modifying by low surface energy substances, namely, stearic acid, 12-hydroxystearic acid and normal dodecyl mercaptan, and forming the super hydrophobic film with high static contact angle and low roll angle on the surface of the zinc sheet substrate. The super hydrophobic film may not be changed after being placed in the air for long time due to better stability and can be used for preventing water, resisting frost, preventing snow and resisting metal corrosion due to better acid and alkali resistance.

Description

technical field [0001] The invention belongs to the technical field of functional materials and relates to a method for preparing a superhydrophobic film on the surface of a zinc substrate. Background technique [0002] Due to its importance in basic research and great potential for industrial applications, superhydrophobic surfaces have been widely valued by people. The research on the wettability of alloy surfaces is a research hotspot and difficulty in the world today. The alloy surface with hydrophobic ability can reduce the flow resistance of water, thereby reducing the transportation cost. Or, under the same power, increase the speed of the ship on the water surface or increase the load capacity; the surface of the alloy with superhydrophobic ability can realize self-cleaning, thereby improving its anti-pollution and anti-corrosion capabilities. [0003] As a common metal, zinc is used in many fields, such as construction, aviation, automobiles, electronic equipment a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/08B05D3/10C23C22/53C23C22/05
Inventor 王琴琴杨武郭昊郑艳萍代学玉赵静卓赵菊玲龙世佳
Owner NORTHWEST NORMAL UNIVERSITY
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