A method for superhydrophobicizing the surface of aluminum material

A kind of aluminum material and super-hydrophobic technology, applied in the direction of metal material coating process, etc., can solve the problems of unfavorable large-scale production, large oxidation current, and difficult quality control, etc., to achieve large-scale production, stable super-hydrophobic performance, high quality easy to control effects

Inactive Publication Date: 2016-02-10
LANZHOU JIAOTONG UNIV
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is cumbersome, requires a large oxidation current, and takes a long time to react with the inorganic salt solution
[0006] Among the currently commonly used methods mentioned above, the chemical etching method is simple and fast, but the disadvantage is that it is limited by the crystal lattice and the quality is difficult to control.
Electrochemical corrosion is easy to form a uniform nanostructure, but it needs to use expensive high-power power supply equipment and long processing time, which is not conducive to mass production
And generally all there is cost higher, is difficult to the practical problem of suitability for industrialized production

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for superhydrophobicizing the surface of aluminum material
  • A method for superhydrophobicizing the surface of aluminum material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] After polishing the aluminum sheet with grade 1235 with metallographic sandpaper, wash it with water, acetone and ethanol for 5 minutes respectively; then roughen it with boiling water for 30 seconds, dry it and place it in 2% In the toluene solution of mercaptopropyltrimethoxysilane, react at 80°C for 5 hours and then wash the sample with toluene and ethanol; finally let the sample react with the toluene solution of carboxyl-terminated polyisoprene at 90°C for 4 hours, after washing with toluene, ethanol and water, and drying at room temperature to obtain a superhydrophobic aluminum sheet.

[0028] The distilled water contact angle performance test was carried out on the surface of the treated aluminum sheet. The test results show that the surface of the treated aluminum sheet has super-hydrophobic functional properties, and the contact angle of distilled water droplets on the surface of the aluminum sheet reaches 152±1°. figure 1 Photo of the static contact angle on ...

Embodiment 2

[0030] Flatten the 3005 aluminum strip and polish it with metallographic sandpaper, wash it with water, acetone and ethanol for 5 minutes respectively; then roughen it with boiling water for 1 minute, dry it and place it in 3% In the toluene solution of propoxy tris (dioctyl phosphate) titanate, react at 80°C for 8 hours and then wash the sample with toluene and ethanol; finally let the sample and the ethyl acetate solution of carboxyl-terminated polystyrene React at 120°C for 4 hours, wash with acetone, ethanol and water, and vacuum dry at 40°C for 6 hours to obtain superhydrophobic aluminum strips.

[0031] The distilled water contact angle performance test was carried out on the treated aluminum strip surface. The test results show that the surface of the treated aluminum strip has super-hydrophobic functional properties, and the contact angle of distilled water on the surface of the aluminum strip reaches 155±1°.

Embodiment 3

[0033] Polish the aluminum alloy foil with the brand name 3A21 with metallographic sandpaper, wash it with water, acetone and ethanol for 5 minutes respectively; In the toluene solution of 2,3-epoxypropyl)trimethoxysilane, react at 80°C for 6 hours and then wash the sample with toluene and ethanol; After reacting at low temperature for 4 hours, after washing with acetone, ethanol and water, vacuum drying at 40° C. for 6 hours to obtain a superhydrophobic aluminum alloy foil.

[0034] The distilled water contact angle performance test was carried out on the surface of the treated aluminum alloy foil. The test results show that the surface of the treated aluminum alloy foil has super-hydrophobic functional properties, and the contact angle of distilled water on the surface of the aluminum alloy foil reaches 153±1°.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
contact angleaaaaaaaaaa
porosityaaaaaaaaaa
Login to view more

Abstract

The invention provides a novel surface super-hydrophobization method for an aluminum material (aluminum or an aluminum alloy). The method comprises the following steps of: polishing the aluminum material with metallographic abrasive paper, cleaning the polished aluminum material with acetone and ethanol and treating the washed aluminum material in boiling water; and putting the aluminum material into coupling agent-containing solution of toluene for reaction at the temperature of 80 DEG C for 4 to 8 hours, reacting the reaction product with solution of an end functional group polymer at the temperature of between 80 and 120 DEG C for 4 hours and cleaning and drying the reaction product to obtain a super-hydrophobization metal aluminum material of which the surface is grafted with a hydrophobic polymer layer, wherein the surface contact angle of the super-hydrophobization metal aluminum material is up to 150 to 157 degrees. An aluminum-based material used in the method is not limited by any crystal lattice and a prepared super-hydrophobic functional membrane is bonded with the surface of an aluminum substrate through a chemical bond, so that an obtained material with super-hydrophobic property has easily controlled quality and stable performance. A surface pre-treatment method and a surface coating method adopted by the aluminum substrate have the advantages of simple process, convenient operation, no need of complex and expensive equipment or long processing time, easy realization of industrialization and suitability for surface super-hydrophobic modification on large-area or specially-shaped or complex aluminum material parts.

Description

technical field [0001] The invention relates to surface treatment of metal substrates, in particular to a method for preparing superhydrophobic surfaces of metal aluminum materials. Background technique [0002] Superhydrophobic surface is one of the more active fields in surface science research and thin film preparation technology in recent years. The study of superhydrophobic surfaces is of great importance to the in-depth understanding of plants (such as lotus leaves, taro leaves and straw leaves, etc.) and animals (such as dolphins, sharks, whales, etc.) Thin films play an extremely important role. At the same time, it has a very broad application prospect in industrial production and people's daily life. [0003] Superhydrophobic surfaces generally refer to surfaces with a static contact angle greater than 150° with water droplets. Studies have found that this special wettability is determined by the surface microstructure of the material and the surface chemical com...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/78C23C22/02B32B15/08C08L47/00C08L53/02C08L25/06C08L33/12
Inventor 冯利邦王彦平强小虎
Owner LANZHOU JIAOTONG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap