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Method for coating dopamine on surface of ultrasonic reinforced material

A surface coating and reinforcing material technology, applied in the direction of surface coating liquid devices, coatings, liquid spraying devices, etc., can solve the problems of poor coating strength, affecting the quality of surface modification, poor coating uniformity, etc. , to achieve the effect of strong coating adhesion, shortening modification time and uniform particle size

Inactive Publication Date: 2014-05-14
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The adhesion strength and uniformity of the dopamine coating are the key to the modification of the material surface (especially the metal surface). However, there are some problems in the method of modifying the material surface by simple dipping method: (1) The coating time is generally It takes more than 24 hours; (2) The strength of the coating is relatively poor; (3) The uniformity of the coating is also relatively poor
This affects to some extent the quality of the surface modification

Method used

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  • Method for coating dopamine on surface of ultrasonic reinforced material
  • Method for coating dopamine on surface of ultrasonic reinforced material
  • Method for coating dopamine on surface of ultrasonic reinforced material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Alkaline buffer solution: Tris-0.1g; H 2 O-80ml; hydrochloric acid solution-0.1mol / L; pH=7.5;

[0027] (2) Dopamine modified solution: 2mg / ml

[0028] (3) Sample to be modified: 304 stainless steel

[0029] like image 3 and Figure 4 It can be seen that the surface of the sample coated by ultrasonic coating for 2 hours is more hydrophilic than the sample coated by static coating for 24 hours, and the surface of stainless steel coated by ultrasonic is more glossy, and the coating is denser and smoother.

Embodiment 2

[0031] (1) Alkaline buffer solution: Tris-0.2g; H 2 O-100ml; hydrochloric acid solution-1mol / L; pH=9.5;

[0032] (2) Dopamine modified solution: 6mg / ml

[0033] (3) Sample to be modified: glass slide

[0034] like Figure 5 and Image 6 It can be seen that the hydrophilicity of the surface of the sample coated by ultrasonic coating for 2 hours and static coating for 24 hours is similar, and the coating of the ultrasonic coated glass slide is denser, smoother and more uniform.

Embodiment 3

[0036] (1) Alkaline buffer solution: Tris-0.121g; H 2 O-90ml; hydrochloric acid solution-0.2mol / L; pH=8.5;

[0037] (2) Dopamine modified solution: 3mg / ml

[0038] (3) Sample to be modified: plastic PET

[0039] like Figure 7 and Figure 8 It can be seen that the hydrophilicity of the surface of the sample coated by ultrasonic coating for 2 hours is better than that of the sample coated by static coating for 24 hours, and the coating of the ultrasonic coated glass slide is denser, smoother and more uniform.

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Abstract

The invention relates to a method for coating dopamine on the surface of an ultrasonic reinforced material. The method comprises the following steps: preparing alkaline buffered solution containing dopamine capable of coating the surface of a material, immersing a material to be modified in the buffered solution, and modifying the surface of the material with the media in the solution in an ultrasonic environment. With respect to the defects of long modification time, poor adhesion and non-uniform surface of a coating and the like of the conventional standing coating modification process, the method greatly shortens the modification time, and the obtained coating has strong adhesion and uniform surface. The effects of modifying a 305 stainless steel, a glass slide, and a polyethylene terephthalate PET plastic by the conventional process and the method are respectively compared to prove the advantages of the method.

Description

technical field [0001] The invention relates to a method for coating dopamine on the surface of an ultrasonic enhancement material. Background technique [0002] Mussel secretions contain a large amount of substances with levodopa and lysine structures, which can adhere to almost all kinds of organic or inorganic surfaces. In recent years, studies have shown that dopamine and its derivatives with similar structures can be coated with various materials, especially the surface of metals and metal oxides, due to their self-polymerization and adhesion properties, so that the Modification of grafted organic substances on the surface of inorganic materials. [0003] The adhesion strength and uniformity of the dopamine coating are the key to the modification of the material surface (especially the metal surface). However, there are some problems in the method of modifying the material surface by simple dipping method: (1) The coating time is generally It takes more than 24 hours;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D7/24B05B17/06C09D179/02
Inventor 杨伟杨黎明杨月皎赵国辰金万芹陈捷陈斌孟庆阳赵杰阎玉
Owner SHANGHAI UNIV