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Preparation of metallic surface super-hydrophobic organic nano film

A metal surface and nano-film technology, applied in chemical instruments and methods, electrolytic organic material coatings, paints containing biocide, etc., can solve problems such as difficulties in industrial application and promotion, long cycle time, and low efficiency

Inactive Publication Date: 2011-08-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two methods of using chemical methods to roughen the metal surface and then modify the metal rough surface with low surface energy are simple in operation, but the cycle is long and the efficiency is low. Therefore, large-scale industrial application and promotion are difficult.

Method used

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  • Preparation of metallic surface super-hydrophobic organic nano film
  • Preparation of metallic surface super-hydrophobic organic nano film
  • Preparation of metallic surface super-hydrophobic organic nano film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] In this embodiment, the substrate metal is a magnesium alloy with a grade of AZ31, and the size is 50×30×1.5 (mm). The specific steps and process conditions of the preparation method combining chemical etching and organic coating are as follows:

[0062] Step 1: Prepare organic coating electrolyte solution

[0063]

[0064] Select 0.5 mmol / l of water-soluble triazazine organic compound salt containing the functional groups shown above, 5 mol / l of sodium boronite and 0.5 mol / l of sodium nitrite to mix and prepare an electrolyte solution for organic coating;

[0065] Step 2: Chemical Etching

[0066] After degreasing and cleaning the metal surface, chemical etching is carried out until the metal surface is rough. The main process parameters of chemical etching are:

[0067] Before preparing the superhydrophobic film, it is roughened by chemical etching, and the etchant is CH 3 CH 2 COOH, the chemical etchant concentration is 0.01mol / l, the etching time is 20min, and...

Embodiment 2

[0072] In this embodiment, the substrate metal is a pure copper sheet with a size of 50×30×1.5 (mm). The specific steps and process conditions of the preparation method combining chemical etching and organic coating are as follows:

[0073] Step 1: Prepare organic coating electrolyte solution

[0074]

[0075] Select water-soluble triazazine organic compound salt 2mmol / l, sodium nitrate 0.6mol / l and sodium phosphate 2mol / l containing the above-mentioned functional groups to mix and prepare the electrolyte solution for organic coating;

[0076] Step 2: Chemical Etching

[0077] After degreasing and cleaning the metal surface, chemical etching is carried out until the metal surface is rough. The main process parameters of chemical etching are:

[0078] Before preparing the super-hydrophobic film, it is roughened by chemical etching, and the etching agent is H 2 o 2 and H at a concentration of 0.1 mol / l 2 SO 4 For the mixed reagent with a mixing ratio of 0.1:1, the etching ...

Embodiment 3

[0083] In this embodiment, the substrate metal is SUS304 stainless steel with a size of 50×30×0.1 (mm). The specific steps and process conditions of the preparation method combining chemical etching and organic coating are as follows:

[0084] Step 1: Prepare organic coating electrolyte solution

[0085]

[0086] Select 5 mmol / l of water-soluble triazazine organic compound salts containing the above-mentioned functional groups, mix 0.05 mol / l of sodium hydroxide and 0.1 mol / l of potassium carbonate to prepare an electrolytic solution for organic coating;

[0087] Step 2: Chemical Etching

[0088] After degreasing and cleaning the metal surface, chemical etching is carried out until the metal surface is rough. The main process parameters of chemical etching are:

[0089] Before preparing the superhydrophobic film, carry out the roughening by chemical etching method, select the etchant as 5mol / l H 2 o 2 , and 1mol / l HF, their mixing ratio is 0.5:0.1 mixed reagent, the etch...

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Abstract

The invention provides a method for preparing an organic nano thin film with super-hydrophobic function on magnesium, copper of stainless steel metal surface which relates to the metal surface treating and modification technique field. The method combines chemical etching with organic film plating. The organic film plating method can select potentiostatic method, constant current or cyclic voltammetry, the film plating time is 1-60min. A static contact angle between the compact organic nano thin film and distilled water is larger than 150 degree that can ensure metal surface having super-hydrophobic function. The method provided by the invention can be used for super-hydrophobic modification to metal surface with large area, in particularly for antifouling and rust prevention to metal surface, and can be used for transporting minim liquor without loss, treating surface of precision optical device mould to enhance demould effect, and enlarge using field of metal material. The method has advantages of simple technique, convenient to operate, high efficiency, short preparing period, low request to device, low cost, controllable thickness and easy to industrialisation producing.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment and modification, in particular to a method for preparing an organic nano-film with superhydrophobic functional properties on the surface of magnesium, copper or stainless steel. Background technique [0002] With the continuous development of microelectronics, computers, micromachines and other fields, the requirements for metal surface properties are getting higher and higher. Metal magnesium, copper, and stainless steel play an extremely important role in human production and life. Among the surface properties of materials, wettability is an important feature, and the superhydrophobic property in wettability has been widely concerned. Superhydrophobic performance refers to when the contact angle between the surface and water droplets is greater than 150°, and it has important characteristics such as waterproof, anti-fog, anti-oxidation, and self-cleaning. The superhydrophobic s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D9/02C09D5/16C09K3/18
Inventor 康志新桑静李元元夏伟邵明
Owner SOUTH CHINA UNIV OF TECH
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