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Method for quickly preparing copper oxide/polytetrafluoroethylene super-amphiphobic coating

A polytetrafluoroethylene, super-amphiphobic technology, applied in the fields of super-hydrophobic surface, metal material surface modification, and material protection, can solve the problem of poor coating uniformity and substrate bonding, unsuitable for large-scale industrial applications, process control Complex conditions, etc., to achieve the effects of high controllability, increased popularization and applicability, and direct process

Active Publication Date: 2020-01-03
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent (application publication number CN103964701A, application publication date August 6, 2014) discloses a silane coupling agent hydrolyzed in an alcohol-water solvent under appropriate temperature and pH conditions, and reacts with silica sol to form Silicon dioxide particles grafted with organic groups are mixed with a certain volume of PTFE emulsion and additives to form a sol-gel, and the method of preparing a superhydrophobic coating is prepared by the dipping and pulling method; although the above-mentioned patented technologies can be prepared containing PTFE super-hydrophobic surface, but these technical methods have more or less disadvantages such as high cost, many environmental pollutants, many process steps, complex control conditions for each process, need for specific equipment support, poor coating uniformity and substrate bonding, etc. Not suitable for large-scale industrial applications
In addition, the surface coatings prepared by these techniques are superhydrophobic, and the superamphiphobic problem is not mentioned

Method used

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  • Method for quickly preparing copper oxide/polytetrafluoroethylene super-amphiphobic coating
  • Method for quickly preparing copper oxide/polytetrafluoroethylene super-amphiphobic coating
  • Method for quickly preparing copper oxide/polytetrafluoroethylene super-amphiphobic coating

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0035] (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;

[0036] (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;

[0037] (3) Put the substrate sample covered with Cu / PTFE composite coating in the previous step into a muffle furnace for direct heat treatment, the gas atmosphere is air, and the heating rate is controlled at 5°C...

specific Embodiment approach 2

[0040] (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;

[0041] (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;

[0042] (3) Put the substrate sample covered with Cu / PTFE composite coating in the previous step into a muffle furnace for direct heat ...

specific Embodiment approach 3

[0044] (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;

[0045] (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;

[0046] (3) Put the substrate sample covered with Cu / PTFE composite coating in the previous step into a muffle furnace for direct heat treatment...

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Abstract

The invention relates to a method for quickly preparing a copper oxide / polytetrafluoroethylene super-amphiphobic coating. The method for quickly preparing the copper oxide / polytetrafluoroethylene super-amphiphobic coating sequentially includes following steps: (1) performing pretreatment such as sanding, alkali washing / acid pickling, acetone, absolute ethyl alcohol and deionized water ultrasonic cleaning and drying on the surface of a base material; (2) compounding a chemical replacement film making emulsion containing a component A and a component B; (3) depositing a copper / polytetrafluoroethylene composite coating through chemical replacement reaction; and (4) solidifying the deposited copper / polytetrafluoroethylene composite coating through thermal oxidation treatment, and then obtaining the copper oxide / polytetrafluoroethylene super-amphiphobic coating of arborization micro-nano structure. The copper oxide / polytetrafluoroethylene super-amphiphobic coating prepared by using the method is characterized by having super-hydrophobicity, super-lipophobicity, thermal stability, corrosion resistance and the like. The preparation method is simple and quick, low in cost and environmentally friendly, and prepares the super-amphiphobic coating stable in surface performance and suitable for industrial production.

Description

technical field [0001] The invention relates to the technical fields of metal material surface modification, superhydrophobic surface and material protection. It specifically relates to a method for preparing a dendritic micro-nanostructured copper oxide / polytetrafluoroethylene composite superamphiphobic (superhydrophobic, superoleophobic) coating, involving surface treatment, liquid phase deposition and polymer adhesion using metal substrates. The super-amphiphobic surface processing method relies on the hydrophobic, oleophobic, self-cleaning and anti-corrosion properties of the surface to improve the service life and functional application of aluminum, magnesium, zinc, iron and other metal materials. Background technique [0002] Metals and their alloys are important engineering materials and play an irreplaceable role in industrial development and social progress. Aluminum is the metal element with the most reserves in the earth's crust. Because of its light weight, high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/38C23C18/18C09D127/18C09D5/08C09D7/61
CPCC08K2003/2248C09D5/08C09D127/18C23C18/1689C23C18/1806C23C18/1834C23C18/38C09D7/61C08K3/22
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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