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Preparation method of a universal superamphiphobic nanocoating based on flower-like titanium dioxide nanoparticles

A technology of titanium dioxide and nanoparticles, which is applied in the field of preparation of universal superamphiphobic nano-coatings, can solve the problems of strong substrate resistance, weak mechanical strength, and single preparation method, and achieve long service life, high mechanical strength, The effect of strong adhesion

Active Publication Date: 2017-11-14
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a simple, convenient, universal, and large-area method for preparing super-amphiphobic nano-coatings to solve the problems of high production cost, weak mechanical strength, strong substrate resistance, Due to the single preparation method, the super-amphiphobic powder sample with a three-dimensional multi-level structure can be directly sieved onto various substrates with double-sided adhesive or sprayed with glue, and can also be sprayed or dipped into a super-amphiphobic coating. On the substrate, the modified surface structure is similar to the lotus leaf surface, with very stable hydrophobicity and oleophobicity, its contact angle to water and oil is greater than 150°, and the rolling angle is less than 10°, with strong mechanical resistance , self-cleaning and antifouling properties

Method used

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  • Preparation method of a universal superamphiphobic nanocoating based on flower-like titanium dioxide nanoparticles
  • Preparation method of a universal superamphiphobic nanocoating based on flower-like titanium dioxide nanoparticles
  • Preparation method of a universal superamphiphobic nanocoating based on flower-like titanium dioxide nanoparticles

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Preparation of flower-shaped titanium dioxide nanoparticles: take 2 ml of tetrabutyl titanate, add dropwise to 40 ml of a mixed solution of ethanol and glycerol with a volume ratio of 3:1 at room temperature, and continue stirring for 5 min to form a transparent mixed solution. Then, the above-mentioned mixed solution was transferred to a reaction kettle, and placed in an environment with a temperature of 180° C. for 24 h. After the reaction, it was cooled to room temperature, and a white precipitate was obtained by repeated centrifugation and washing with ethanol, and then drying. Finally, the white precipitate was calcined in air at 450 °C for 2 h to obtain a white powder product, thus completing the preparation of flower-like titanium dioxide nanoparticles.

[0032] (2) Low surface energy modification: Add the titanium dioxide powder product prepared in step (1) to 100 ml of 1% perfluorooctanoic acid in n-hexane solution, and disperse it by ultrasonication or st...

Embodiment 2

[0035] (1) Preparation of flower-shaped titanium dioxide nanoparticles: take 2 ml of tetrabutyl titanate, add dropwise to 40 ml of a mixed solution of ethanol and glycerol with a volume ratio of 3:1 at room temperature, and continue stirring for 5 min to form a transparent mixed solution. Then, the above-mentioned mixed solution was transferred to a reaction kettle, and placed in an environment with a temperature of 180° C. for 24 h. After the reaction, it was cooled to room temperature, and a white precipitate was obtained by repeated centrifugation and washing with ethanol, and then drying. Finally, the white precipitate was calcined in air at 450 °C for 2 h to obtain a white powder product, thus completing the preparation of flower-like titanium dioxide nanoparticles.

[0036] (2) Low surface energy modification: Add the titanium dioxide powder product prepared in step (1) to 100 ml of 0.5% perfluorooctanoic acid in n-hexane solution, and disperse it by ultrasonication or ...

Embodiment 3

[0039] (1) Preparation of flower-shaped titanium dioxide nanoparticles: take 2 ml of tetrabutyl titanate, add dropwise to 40 ml of a mixed solution of ethanol and glycerol with a volume ratio of 3:1 at room temperature, and continue stirring for 5 min to form a transparent mixed solution. Then, the above-mentioned mixed solution was transferred to a reaction kettle, and placed in an environment with a temperature of 180° C. for 24 h. After the reaction, it was cooled to room temperature, and a white precipitate was obtained by repeated centrifugation and washing with ethanol, and then drying. Finally, the white precipitate was calcined in air at 450 °C for 2 h to obtain a white powder product, thus completing the preparation of flower-like titanium dioxide nanoparticles.

[0040] (2) Low surface energy modification: Add the titanium dioxide powder product prepared in step (1) to 100 ml of 1% perfluorooctanoic acid in n-hexane solution, and disperse it by ultrasonication or st...

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Abstract

The invention belongs to the technical field of super-amphiphobic nano coating preparation, and especially relates to a preparation method of a universal super-amphiphobic nano coating based on flower shape titanium dioxide nano particles. The preparation method comprises steps of flower shape titanium dioxide nano particle preparation, low surface energy modification, and combination between super-amphiphobic powder and a substrate. The contact angles between various substrates coated by super-amphiphobic powder and water / oil are all larger than 150 degrees and the roll angles are all smaller than 10 degrees. Moreover, after combination, the super-amphiphobic substrate has a strong performance on resisting wear, extrusion, and stretching and high chemical stability. The preparation technology is simple, the raw materials are easily available, not toxic, and environment-friendly; the cost is low, the stability is high, and the preparation method is suitable for large scale preparation and application. The coating is suitable for being used in an extreme work environment, can be applied to oil stain resistant equipment or waterproof equipment, and at the same time, can also be used in the fields such as industrial pipeline transportation, oil-water separation metal network, and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of super-amphiphobic nano-coatings, and relates to the preparation of super-amphiphobic powders and coatings applicable to various substrates, and methods for preparing super-hydrophobic and super-oleophobic surfaces on various substrates, in particular to a A method for preparing a universal superamphiphobic nanocoating based on flower-like titanium dioxide nanoparticles. Background technique [0002] Superhydrophobic phenomena exist widely in nature, such as the surface of lotus leaves, butterfly wings, and water strider legs. However, the superhydrophobic surface has the disadvantage of being easily wetted and polluted by oil. Compared with superhydrophobic surfaces, superamphiphobic surfaces have greater application value due to their dual characteristics of oleophobicity and hydrophobicity. A superamphiphobic surface generally refers to a material surface with a contact angle of more th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D5/16C01G23/053B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G23/053C01P2004/03C01P2004/04C01P2004/30C01P2004/64C09D1/00C09D5/1681
Inventor 郭志光陈立伟
Owner HUBEI UNIV
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