Method for preparing transparent organic hydrophobic coating on surface of aluminum plate

A technology of hydrophobic coating and aluminum plate, which is applied in the direction of surface coating liquid device, coating, pretreatment surface, etc., which can solve the problem of poor adhesion, high hydrophobicity and service life, complicated preparation process and equipment And other problems, to achieve good hydrophobicity, self-cleaning effect is obvious

Inactive Publication Date: 2010-11-17
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the existing deficiencies of poor adhesion of the organic coating on the surface of the aluminum plate, complex preparation process and equipment, high hydrophobicity and service life, the present invention provides a preparation of a transparent organic hydrophobic coating on the surface of the aluminum plate with simple operation method

Method used

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  • Method for preparing transparent organic hydrophobic coating on surface of aluminum plate
  • Method for preparing transparent organic hydrophobic coating on surface of aluminum plate
  • Method for preparing transparent organic hydrophobic coating on surface of aluminum plate

Examples

Experimental program
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Embodiment 1

[0017] A kind of preparation method of transparent organic hydrophobic coating on the surface of aluminum plate, selects the 1060 aluminum plate of common rolling for use, according to figure 2 Steps shown:

[0018] 1) First, use ethanol to clean the surface of the aluminum plate to remove the remaining oil on the surface and other dirt that will affect the reaction with silane in the next step, then rinse with water and dry naturally;

[0019] 2) A hydrolysis solution was prepared by γ-aminopropyltriethoxysilane, distilled water and absolute ethanol (analytical grade), and the volume ratio of the three was 2:1:40. The prepared hydrolyzed solution is kept at 20° C. for 100 min, during which time the hydrolyzed solution can be stirred.

[0020] 3) Treat the surface of the aluminum plate with the hydrolysis solution by means of shower coating, and keep the process for 2 minutes, and then place the aluminum plate at 150° C. for 30 minutes to dry.

[0021] 4) Coating organic si...

Embodiment 2

[0023] A kind of preparation method of transparent organic hydrophobic coating on the surface of aluminum plate, select AA1070 aluminum plate for use, according to figure 2 Steps shown:

[0024] 1) First, use ethanol to clean the surface of the aluminum plate to remove the remaining oil on the surface and other dirt that will affect the reaction with silane in the next step, then rinse with water and dry naturally;

[0025] 2) A hydrolysis solution was prepared by γ-aminopropyltriethoxysilane, distilled water and absolute ethanol (analytical grade), and the volume ratio of the three was 4:1:40. The prepared hydrolyzed solution is kept at 30° C. for 70 min, during which time the hydrolyzed solution can be stirred.

[0026] 3) Treat the surface of the aluminum plate with the hydrolysis solution, or immerse the aluminum plate in the hydrolysis solution to make the hydrolysis solution react with the surface of the aluminum plate. The process is kept for 1 min, and then the alumi...

Embodiment 3

[0029] The organic coating prepared by the method of the present invention is mainly subjected to cross-sectional SEM test analysis and performance tests such as hydrophobicity, adhesion, light transmittance, corrosion resistance and weather resistance.

[0030] 1) Cut the aluminum plate with organic coating into 0.5cm×1cm sample, clamp it with copper sheet, and grind the metallographic sample. After Cr 2 o 3 After polishing, carry out gold-spraying treatment on the surface of metallographic sample, as embodiment 1, then place under JXA-840 type scanning electron microscope, observe cross-section appearance, and measure coating thickness, the result is as follows image 3 shown.

[0031] 2) Select an aluminum plate sample with a clean surface with an organic coating, and use a syringe to continuously add distilled water to the surface until the height of the water drop does not increase. During this process, keep the needle of the syringe inside the water drop. According to...

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Abstract

The invention discloses a method for preparing a transparent organic hydrophobic coating on the surface of an aluminum plate. The method comprises the following steps of: preparing hydrolysis solution; processing the aluminum plate with the hydrolysis solution and drying the aluminum plate; coating a silicone glass resin on the aluminum plate; and heating the aluminum plate. The organic coating prepared by the invention can effectively resist the corrosion of acid solution with pH of 3.5; the surface of the coating after being corroded for 168 hours still is not obviously changed; the coating has high adhesive force to the aluminum plate, so the coating does not crack or shed when folded; the test of a WS-2002 coating adhesive force automatic scratch tester shows that the adhesive force between the coating and the matrix of the aluminum plate reaches 40N; the coating does not shed after being circulated for 50 times in hot water of 95 DEG C and cold water of 20 DEG C; the contact angle between pure water and the surface of the coating is close to 120 degrees; and the coating has high hydrophobicity, obvious self-cleaning effect and light transmittance of 96 percent.

Description

technical field [0001] The invention relates to a method for preparing an organic hydrophobic coating, which belongs to the technical field of composite materials. Background technique [0002] At present, the application of organic coatings on the surface of aluminum plates is limited to provide anti-corrosion protection for aluminum plates, and the adhesion of organic coatings to the surface of aluminum plates is insufficient, and the elastic modulus of organic coatings and aluminum is very different. Problems such as cracking and falling off of the organic coating during processing are often applied after the aluminum plate is produced as a finished product. In addition, the hydrophobicity of the organic coating itself makes it have a certain self-cleaning function, but the methods currently reported to make the organic coating on the metal surface superhydrophobic have obvious shortcomings: the processes used in these methods are complicated, and not only the organic Mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B33/00C09D183/08C09D183/00B05D7/14B05D3/02
Inventor 田学雷石新颖张宁孙玉成申志清徐岩
Owner SHANDONG UNIV
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