Super-hydrophilic and underwater super-lipophobic coating and preparation method thereof

An underwater super-oleophobic and super-hydrophilic technology, applied in antifouling/underwater coatings, coatings, paints containing biocide, etc., can solve problems such as complex process, high cost, and poor anti-bioadhesion performance , to achieve the effect of simple process, low cost and simple equipment

Inactive Publication Date: 2015-05-20
佛山市高明区生产力促进中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing super-oleophobic coatings have high cost, complex process, and poor anti-bioadhesion performance when used.

Method used

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  • Super-hydrophilic and underwater super-lipophobic coating and preparation method thereof
  • Super-hydrophilic and underwater super-lipophobic coating and preparation method thereof
  • Super-hydrophilic and underwater super-lipophobic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Dissolve 5.0 g of alkoxysilane-functionalized betaine-type zwitterionic compound in 95.0 g of ethanol at room temperature, adjust the pH of the solution to 2 with 0.1 M hydrochloric acid solution, and hydrolyze and age for 4 hours to obtain A solution;

[0039] (2) adding 5.0 g of nano silicon dioxide with a size of 50 nm into 95.0 g of methanol solvent to obtain B solution;

[0040] (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;

[0041] (4) Clean the glass surface and dry it at normal temperature;

[0042] (5) Apply the mixed solution of step (3) to the clean glass surface by spraying, and place 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.

[0043] The thickness of the prepared coating is 10 μm...

Embodiment 2

[0048] (1) Dissolve 5.0 g of alkoxysilane-functionalized betaine-type zwitterionic compound in 450.0 g of methanol at room temperature, adjust the pH of the solution to 5 with 0.1 M hydrochloric acid solution, and hydrolyze and age for 1 hour to obtain A solution;

[0049] (2) adding 5.0 g of nano silicon dioxide with a size of 100 nm into 450.0 g of ethanol solvent to obtain B solution;

[0050](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;

[0051] (4) Clean the glass surface and dry it at normal temperature;

[0052] (5) Using the method of shower coating, apply the mixed solution of step (3) to the clean glass surface, and place it at 160°C for 100 minutes to obtain a super-hydrophilic and underwater super-oleophobic coating. The three-dimensional microstructure is attached Figure 6 shown.

[0053] The thickness of the prepared coating is 100 μm, and the contact angle...

Embodiment 3

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

[0059] (2) adding 5.0 g of nano silicon dioxide 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 normal 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 ...

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Abstract

The invention discloses a super-hydrophilic and underwater super-lipophobic coating which consists of a substrate and an organic/inorganic hybrid coating, wherein the organic/inorganic hybrid coating containing an ampholytic ionic group is coated on the surface of the substrate. 1, the method disclosed by the invention is simple in process, easy in preparation of raw materials, simple in equipment and low in cost, and the functional coating can be prepared on the surfaces of different substrates in a large area, so as to achieve super hydrophilicity and underwater super lipophobicity; and 2, by introducing a betaine-type ampholytic ionic compound of a cell outer membrane simulating molecular structure to the prepared super-hydrophilic and underwater super-lipophobic coating, the prepared functional coating not only has functions of self-cleaning, anti-fogging, underwater oil resistance and the like, but also has excellent performances of resisting biological adhesion and the like.

Description

technical field [0001] The invention relates to the technical field of nanomaterial surface preparation, in particular to a surface with special wettability, that is, a coating with superhydrophilic and underwater superoleophobic properties and a preparation method thereof. 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 lotus leaves, which can be used to prevent freezing, waterproof and anti-fouling, etc.; super-hydrophil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D7/12C09D5/16
Inventor 彭新艳
Owner 佛山市高明区生产力促进中心
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