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

A polytetrafluoroethylene, super-amphiphobic technology, used in coatings, metal material coating processes, anti-corrosion coatings, etc., can solve the problem of poor coating uniformity and substrate bonding, unsuitable for large-scale industrial applications, process control Complex conditions and other problems, to achieve the effect of high controllability, increased popularization and application, and direct process

Active Publication Date: 2021-08-03
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Abstract
  • Description
  • Claims
  • Application Information

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

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0035] (1) Select the 6061 aluminum alloy having a size of 20 × 40 × 2 mm as a substrate, and the substrate sample is smooth and smooth, and the polished sample is sequentially placed in acetone, anhydrous ethanol is ultrasound. 5 min. The oil and pollutants of the sample surface are removed;

[0036] (2) 6061 aluminum alloy sample described above is used in impregnating film formation method in (mass) 10 parts of pentaqueous sulfate, 1 sodium chloride, deionized water (pure water) 50 parts, water soluble PTFE emulsion 20 copies of the chemical replacement membrane emulsion, the immersion time was 4 min, and a biased Cu / PTFE composite coating was generated on the surface of the matrix material, and the retrieval was taken out;

[0037] (3) The surface of the Cu / PTFE composite coating is placed in the upper surface of the Cu / PTFE composite coating is directly thermally treated, the gas atmosphere is air, the control temperature rate is 5 ° C / min, and the bia is biased on th...

specific Embodiment approach 2

[0040] (1) Select the 6061 aluminum alloy having a size of 20 × 40 × 2 mm as a substrate, and the substrate sample is smooth, and the base sample is washed 2 min in the basic water washing liquid, and will be polished. The sample is sequentially placed in acetone, ultrasonic waves in anhydrous ethanol, washed 10 min to remove grease and contaminants on the surface of the sample;

[0041] (2) 6061 aluminum alloy samples described above adopt a dip film formation method (20 parts of copper sulfate, 1.5 parts of sodium chloride, 100 parts of deionized water (pure water), water soluble PTFE emulsion 30 copies of the chemical replacement membrane emulsion, the immersion time was 3 min, and a biased Cu / PTFE composite coating was generated on the surface of the matrix material, and the post was taken out;

[0042] (3) Putting the substrate sample of the Cu / PTFE composite coating in the previous step in the muffle furnace directly to heat treatment, the gas atmosphere is air, the cont...

specific Embodiment approach 3

[0044] (1) Select 6061 pure aluminum of 20 × 40 × 2 mm to the substrate sample, and use sandpaper to smooth the substrate sample smooth, washing 2 min in the pickled liquid of 30% nitric acid, and will be polished The ultrasonic waves were placed in acetone and anhydrous ethanol for 15 min to remove grease and contaminants on the surface of the sample;

[0045] (2) The above-mentioned pure aluminum sample is made of dipping lipping method in (mass) 250 parts of copper sulfate, 2 potassium chloride, deionized water (pure water), water soluble PTFE lotion 30 Part of the chemical replacement film emulsion, the immersion time is 5 min, and a biased Cu / PTFE composite coating is generated on the surface of the matrix material, and the retrieval is removed;

[0046] (3) The surface of the Cu / PTFE composite coating is placed in the upper surface of the Cu / PTFE composite coating is directly thermally treated, the gas atmosphere is air, the control temperature rate is 5 ° C / min, and...

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Abstract

The invention relates to a method for rapidly preparing copper oxide / polytetrafluoroethylene composite super-amphiphobic coating, which comprises the following steps in turn: (1) pretreatment of the surface of the base material (sanding, alkali or pickling, acetone, Ultrasonic cleaning with absolute ethanol and deionized water, and drying); (2) preparation of a chemical displacement film-forming emulsion comprising component A and component B; (3) chemical displacement reaction deposition of copper / polytetrafluoroethylene composite coating; (4) Thermal oxidation treatment solidifies the deposited copper / polytetrafluoroethylene composite coating to obtain a copper oxide / polytetrafluoroethylene composite superamphiphobic coating with a dendritic micro-nano structure. The copper oxide / 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 industrialized production.

Description

Technical field [0001] The present invention relates to the surface modification of metal materials, superhydrophilic surfaces, and material protection technology. Specifically, a method of preparing dendritic micro-nanostructured copper oxide / polytetrafluoroethylene composite ultraflicit (superhydrophobic, superovoltaic oil) coating involves surface treatment using a metal matrix, liquid phase deposition and polymer sticky The surface processing method of attaching the phenomenon, relies on over-donish surface of hydrophobic, olee, self-cleaning and corrosion resistance, improves the life and functional application of metal materials such as aluminum, magnesium materials, zinc materials and iron. Background technique [0002] Metal and its alloys are important engineering materials, which acts in industrial development and social progress. Aluminum is the most reserved metal element in the crust, due to its and alloy, high-proportioned strength, good conductive and thermal con...

Claims

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Application Information

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Patent Type & Authority Patents(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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