Preparation method of polydopamine nano-zinc oxide superhydrophobic coating

A polydopamine nano- and super-hydrophobic coating technology, which is applied in coatings, anti-fouling/underwater coatings, anti-corrosion coatings, etc., can solve the problems of easy falling off, inability to adapt to chemical composition of implant materials, weak force, etc., to achieve Easy to obtain raw materials, excellent super-hydrophobic properties, and strong adhesion

Active Publication Date: 2017-11-03
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The biofunctional modification method on the surface of metal or inorganic materials is still mainly a physical coating method, and the physical coating between the organic layer and the metal substrate is often easy to fall off due to too weak force, and the chemical modification method, such as silane Chemical methods and monolayer self-assembly methods often require a specific chemical composition of the substrate, which cannot be adapted to implant materials with complex chemical compositions.

Method used

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  • Preparation method of polydopamine nano-zinc oxide superhydrophobic coating
  • Preparation method of polydopamine nano-zinc oxide superhydrophobic coating

Examples

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Effect test

Embodiment 1

[0022] The preparation method of this embodiment includes the following steps.

[0023] (1) Wash and polish the Al substrate with deionized water, ethanol, and acetone in sequence, and prepare dopamine buffer: first prepare 0.01mol / L TRIS-HCl buffer, then add dopamine hydrochloride to make the dopamine concentration of the solution 2g / L, and Put the Al substrate into the dopamine solution, stir for 18 hours under aerobic and room temperature environment, take out the substrate and ultrasonically clean it for 10 minutes, put it in a vacuum drying oven at 60°C for 30 minutes, and then the Al substrate with polydopamine film can be obtained. piece.

[0024] (2) Prepare the nano-zinc oxide precursor solution - first prepare a 0.1mol / L zinc nitrate ethanol solution, and then add dropwise ammonia water with a concentration of 12mol / L in it. Put the Al substrate in step (1) into the solution, seal it, and react at 80°C for 5 hours. After the reaction is completed, take it out and va...

Embodiment 2

[0027] The preparation method of this embodiment includes the following steps.

[0028] (1) Wash and polish the Cu substrate with deionized water, ethanol, and acetone in sequence, and prepare dopamine buffer: first prepare 0.01mol / L TRIS-HCl buffer, then add dopamine hydrochloride to make the dopamine concentration of the solution 2g / L, and Put the Cu substrate into the dopamine solution, stir for 18 hours under aerobic and room temperature environment, take out the substrate and ultrasonically clean it for 10 minutes, and put it in a vacuum drying oven at 60°C for 30 minutes to obtain a Cu substrate with a polydopamine film. piece.

[0029] (2) Prepare the nano-zinc oxide precursor solution - first prepare a 0.1mol / L zinc nitrate ethanol solution, and then add dropwise ammonia water with a concentration of 12mol / L in it. Put the Al substrate in step (1) into the solution, seal it, and react at 80°C for 5 hours. After the reaction is completed, take it out and vacuum dry it ...

Embodiment 3

[0032] The preparation method of this embodiment includes the following steps.

[0033] (1) Wash and polish the Ti substrate with deionized water, ethanol, and acetone in sequence, and prepare dopamine buffer: first prepare 0.01mol / L TRIS-HCl buffer, then add dopamine hydrochloride to make the dopamine concentration of the solution 2g / L, and Put the Ti substrate into the dopamine solution, stir for 18 hours under aerobic and room temperature environment, take out the substrate and ultrasonically clean it for 10 minutes, and put it in a vacuum drying oven at 60°C for 30 minutes to obtain a Ti substrate with a polydopamine film. piece.

[0034] (2) Prepare the nano-zinc oxide precursor solution - first prepare a 0.1mol / L zinc nitrate ethanol solution, and then add dropwise ammonia water with a concentration of 12mol / L in it. Put the Ti substrate in step (1) into the solution, seal it, and react at 80°C for 5 hours. After the reaction is completed, take it out and vacuum dry it ...

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Abstract

The invention discloses a preparation method of a polydopamine nano-zinc oxide superhydrophobic coating. The preparation method comprises the following steps: coating the surface of a matrix with polydopamine; (2) depositing a layer of nano-zinc oxide through a water bath precipitation method and a hydrothermal method; (3) then putting the matrix into a dodecanethiol ethanol solution for surface modification, so as to prepare the coating with relatively high superhydrophobic property. The preparation method disclosed by the invention is simple and feasible; reaction conditions are mild; a requirement of equipment is low; large-scale production can be realized, and the preparation method has extremely high popularization and application value. The prepared superhydrophobic coatin has a static contact angle of 160 degrees or above and a rolling angle of 5 degrees or below.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a superhydrophobic coating and a preparation method thereof. Background technique [0002] Superhydrophobic phenomena exist widely in nature, such as the surface of lotus leaves, butterfly wings, and water strider legs. A superhydrophobic surface generally refers to a material surface with a contact angle of more than 150° to water and a rolling angle of less than 10°. Superhydrophobic surfaces have many unique and excellent surface properties: hydrophobicity, self-cleaning, anti-corrosion, anti-icing, anti-fog, etc., making them have great application prospects in many fields. [0003] The biofunctional modification method on the surface of metal or inorganic materials is still mainly a physical coating method at present, and the physical coating between the organic layer and the metal substrate is often easy to fall off due to too weak force, while the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D179/04C09D5/08C09D5/14C09D7/12C08G73/06
CPCC08G73/0672C08K2003/2296C08K2201/011C09D5/08C09D5/14C09D179/04
Inventor 李长全周浩宇欧军飞薛名山王法军谢蝉曹镇君李文
Owner NANCHANG HANGKONG UNIVERSITY
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