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Super-hydrophilic and underwater super-oleophobic coating, as well as preparation method and application thereof

An underwater super-oleophobic and super-hydrophilic technology, applied in antifouling/underwater coatings, coatings, paints containing biocide, etc., can solve the problems of cumbersome preparation process, cumbersome technical process, and poor stability, and achieve The method has the advantages of simple process, readily available raw materials and low cost

Inactive Publication Date: 2015-05-13
泉州三欣新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patents CN102029079B, CN102716676A, CN103100239A and CN103111096A disclose the use of various methods to prepare oil-water separation nets with underwater superoleophobic properties, but none of them involve Preparation of flat surface coating; Chinese patent CN 101704955B discloses the use of self-assembly technology and heterogeneous nucleation technology, using chitosan and silicon dioxide as raw materials to construct a rough surface structure to obtain an underwater super-oleophobic material surface , but the preparation process of the material is cumbersome
In addition, on the basis of previous work (Wu Yalu, Li Guangji, Liu Yunhong, et al. Preparation, characterization and anti-adhesion properties of zwitterionic self-assembled bionic surfaces [J]. Chemical Journal of Chinese Universities, 2014: 1484-1491.), A sulfobetaine-type zwitterionic compound was designed and synthesized, and the compound was constructed on the surface of a glass substrate by self-assembly technology to simulate the biomimetic surface of the outer membrane of cells. The prepared biomimetic surface has excellent anti-fog properties and anti-bacterial adhesion properties, but the technical process of preparing the surface by this molecular self-assembly method is relatively cumbersome, and the film layer is thin and the stability is poor

Method used

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  • Super-hydrophilic and underwater super-oleophobic coating, as well as preparation method and application thereof
  • Super-hydrophilic and underwater super-oleophobic coating, as well as preparation method and application thereof
  • Super-hydrophilic and underwater super-oleophobic coating, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Dissolve 5.0g of alkoxysilane-functionalized betaine-type zwitterionic compound in 95.0g of ethanol at room temperature, adjust the pH of the solution to 2 with 0.1M hydrochloric acid solution, hydrolyze and age for 4 hours, and obtain A solution ;

[0040] (2) Add 5.0g of nano-silica with a size of 50nm to 95.0g of methanol solvent to obtain B solution;

[0041] (3) At room temperature, mix 10.0g of A solution, 2.0g of B solution, 0.2g of isopropanol, 0.1g of water and 2g of ethyl orthosilicate and stir evenly to obtain a mixed solution;

[0042] (4) Clean the glass surface and dry it at room temperature;

[0043] (5) By spraying, apply the mixed solution of step (3) on the clean glass surface and treat it at 80°C for 30 minutes to obtain a super-hydrophilic and underwater super-oleophobic coating. The three-dimensional surface of the coating Microstructure as attached figure 1 shown.

[0044] The thickness of the prepared coating is 10 μm, and the contact ang...

Embodiment 2

[0049] (1) Dissolve 5.0g of alkoxysilane-functionalized betaine-type zwitterionic compound in 450.0g of methanol at room temperature, adjust the pH of the solution to 5 with 0.1M hydrochloric acid solution, hydrolyze and age for 1 hour, and obtain A solution ;

[0050] (2) Add 5.0g of nano-silica with a size of 100nm to 450.0g of ethanol solvent to obtain B solution;

[0051] (3) At room temperature, mix 50.0 g of A solution, 1.0 g of B solution, 0.2 n-butanol, and 0.1 g of water and stir evenly to obtain a mixed solution;

[0052] (4) Clean the glass surface and dry it at room temperature;

[0053] (5) Using the method of shower coating, apply the mixed solution of step (3) to the clean glass surface and treat it at 160°C for 100 minutes to obtain a super-hydrophilic and underwater super-oleophobic coating. The three-dimensional microstructure is attached Image 6 shown.

[0054] The thickness of the prepared coating is 100 μm, and the contact angle of the surface with wat...

Embodiment 3

[0058] (1) Dissolve 20.0g of alkoxysilane-functionalized betaine-type zwitterionic compound in 95.0g of methanol at room temperature, adjust the pH of the solution to 7 with 0.1M hydrochloric acid solution, hydrolyze and age for 5 hours, and obtain A solution ;

[0059] (2) Add 5.0 g of nano-silica with a size of 50 nm into 145.0 g of isopropanol solvent to obtain B solution;

[0060] (3) At room temperature, mix 10.0g of A solution, 20.0g of B solution, 10.0g of water and 2g of methyl orthosilicate and stir evenly to obtain a mixed solution;

[0061] (4) Clean the glass surface and dry it at room temperature;

[0062] (5) Apply the mixed solution in step (3) to a clean glass surface by spraying, and place it at 120°C for 30 minutes to obtain a superhydrophilic and underwater superoleophobic coating.

[0063] The thickness of the prepared coating is 50 μm, and the contact angle of the surface with water in air is 3°; the contact angle with hexadecane under water is 150°.

...

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Abstract

The invention relates to a super-hydrophilic and underwater super-oleophobic coating, as well as a preparation method and application thereof. According to the invention, an organic / inorganic hybrid sol preparation method and a surface coating method are adopted, an organic / inorganic hybrid coating containing zwitter-ion groups with a certain thickness is constructed on the material surface, and is prepared through mixing alkoxy silane functionalized glycine betaine type zwitter-ion compound and silicon dioxide particles with other auxiliaries and performing hydrolysis, coating and thermal treatment. The functional coating provided by the invention is super-hydrophilic in air and super-oleophobic underwater; as the glycine betaine type zwitter-ion compound simulating the cell outer membrane molecular structure is introduced in the prepared super-hydrophilic underwater super-oleophobic coating, the prepared functional coating has the self-cleaning function, the antifogging function, the underwater oil resistance function, and the like, and has excellent bioadhesive resistance; the coating, the method and the application thereof have the advantages that the technology is simple, raw materials are easy to obtain, the equipment is simple, the cost is low, and the coating can be large-area prepared.

Description

technical field [0001] The invention belongs to the technical field of surface preparation of nanometer materials, and in particular relates to a surface with special wettability, that is, a coating with superhydrophilic and underwater superoleophobic coating and its preparation method and application. Background technique [0002] Surface wettability is one of the important characteristics of solid surfaces, which is mainly determined by surface chemistry and surface microstructure. Through the regulation of surface chemical composition and microstructure, different types of special wetting surfaces can be formed on the surface of objects, including superhydrophobic, superhydrophilic, superoleophobic and superoleophilic, etc., which have a wide range of applications in daily life and industrial production. Applications. For example, the super-hydrophobic surface has a self-cleaning effect similar to that of a lotus leaf, which can be used for anti-icing, waterproof and ant...

Claims

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Application Information

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IPC IPC(8): C09D183/04C09D1/00C09D5/16
Inventor 刘云晖其他发明人请求不公开姓名
Owner 泉州三欣新材料科技有限公司
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