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A method for rapid preparation of copper/polytetrafluoroethylene superamphiphobic coating

A polytetrafluoroethylene, super-amphiphobic technology, used in coatings, antifouling/underwater coatings, anti-corrosion coatings, etc., can solve the problem of poor coating uniformity and substrate adhesion, unsuitable for large-scale industrial applications Complex control conditions, etc., to achieve the effects of high controllability, increased popularization and application, and direct process

Active Publication Date: 2021-06-29
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above-mentioned patented technologies can prepare special wettability surfaces containing PTFE, these technical methods have more or less high costs, many environmental pollutants, many process steps, complex control conditions for each process, and the need for specific equipment support. , poor coating uniformity and substrate bonding, not suitable for large-scale industrial applications

Method used

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  • A method for rapid preparation of copper/polytetrafluoroethylene superamphiphobic coating
  • A method for rapid preparation of copper/polytetrafluoroethylene superamphiphobic coating
  • A method for rapid preparation of copper/polytetrafluoroethylene superamphiphobic coating

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0034] (1) Select a 6061 aluminum alloy with a size of 20×40×2mm as the base sample, polish the base sample smoothly with sandpaper, and put the polished sample into acetone and absolute ethanol for 5 minutes for ultrasonic cleaning, To remove grease and pollutants on the surface of the sample;

[0035] (2) The above-mentioned cleaned 6061 aluminum alloy sample is prepared by dipping into a membrane (parts by mass: 10 parts of copper sulfate pentahydrate, 1 part of sodium chloride, 50 parts of deionized water (pure water), water-soluble PTFE emulsion 20 parts) in the chemical displacement membrane-making emulsion, the immersion time is 4min, generates partial reddish Cu / PTFE composite coating on the surface of the base material, and takes it out for subsequent use;

[0036] (3) Put the substrate sample covered with Cu / PTFE composite coating in the previous step into a vacuum tube furnace for direct heat treatment. The vacuum degree in the furnace is figure 1 Shown), it is self...

specific Embodiment approach 2

[0039] (1) Select a 6061 aluminum alloy with a size of 20×40×2mm as the base sample, polish the base sample smoothly with sandpaper, wash it with 3% sodium hydroxide alkaline water for 2 minutes, and put the polished Put the sample into acetone and absolute ethanol in sequence for 10 minutes of ultrasonic cleaning to remove the grease and pollutants on the surface of the sample;

[0040] (2) The above-mentioned cleaned 6061 aluminum alloy sample was prepared by dipping into a membrane (parts by mass: 20 parts of copper sulfate pentahydrate, 1.5 parts of sodium chloride, 100 parts of deionized water (pure water), water-soluble PTFE emulsion 30 parts) in the chemical displacement film-making emulsion, the immersion time is 3min, generates partial reddish Cu / PTFE composite coating on the base material surface, and it is standby after taking out;

[0041] (3) Put the substrate sample covered with Cu / PTFE composite coating in the previous step into the muffle furnace for direct hea...

specific Embodiment approach 3

[0043] (1) Select 6061 pure aluminum with a size of 20×40×2mm as the base sample, polish the base sample smoothly with sandpaper, pickle with 30% nitric acid pickling solution for 2 minutes, and polish the polished samples in turn Put it into acetone and absolute ethanol for ultrasonic cleaning for 15 minutes to remove grease and pollutants on the surface of the sample;

[0044] (2) The above-mentioned cleaned pure aluminum sample was dipped and pulled in (parts by mass: 25 parts of copper sulfate pentahydrate, 2 parts of potassium chloride, 150 parts of deionized water (pure water), 30 parts of water-soluble PTFE emulsion Parts) in the chemical displacement film-making emulsion, the immersion time is 5min, and a reddish Cu / PTFE composite coating is generated on the surface of the base material, which is taken out for subsequent use;

[0045] (3) Put the substrate sample covered with Cu / PTFE composite coating in the previous step into the muffle furnace for direct heat treatme...

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Abstract

The present invention relates to a kind of method for rapidly preparing copper / polytetrafluoroethylene composite superamphiphobic coating, comprising the following steps in turn: (1) pretreatment (sanding, alkali or pickling, acetone, no water ethanol, deionized water ultrasonic cleaning, drying); (2) preparation of chemical displacement film-making emulsion comprising component A and component B; (3) chemical displacement reaction deposition of copper / polytetrafluoroethylene composite coating; ( 4) Vacuum thermal curing the deposited copper / polytetrafluoroethylene composite coating to obtain a copper / polytetrafluoroethylene composite superamphiphobic coating with a dendritic micro-nano structure. The copper / polytetrafluoroethylene composite superamphiphobic coating prepared by the invention has the characteristics of superhydrophobicity, superoleophobicity, thermal stability, corrosion resistance and the like. The preparation method of the present invention is simple and quick, low in cost and environment-friendly, and the prepared superamphiphobic surface has stable properties and is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical fields of coating preparation, special wettability surface and material surface protection. It specifically relates to a method for rapidly preparing a dendritic micro-nano structure copper / polytetrafluoroethylene composite super-amphiphobic (super-hydrophobic, super-oleophobic) coating, relying on the super-amphiphobic surface's hydrophobic, oleophobic, anti-fouling, Self-cleaning and anti-corrosion properties, improve the service life and functional application of aluminum, magnesium, zinc, iron and other metal materials. Background technique [0002] Metal materials such as aluminum, magnesium, zinc, and iron are common engineering materials and have played an important role in industrial and social development; however, these metal materials are prone to corrosion and fouling in the service environment during their service. Even damage, which shortens the service life of the material and increases maintenance...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D127/18C09D5/10C09D5/16
CPCC09D5/10C09D5/1668C09D127/18C08K3/08
Inventor 于思荣吕哲馨尹晓丽周雪宋锴星
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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