Super-oleophobic coating and preparation method thereof

A super oleophobic and coating technology, which is applied in the direction of coating, can solve the problems of human body and environmental impact, and achieve the effect of excellent oleophobic performance, simple operation and simple preparation method

Active Publication Date: 2016-03-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method uses a fluorine-containing solvent, which

Method used

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  • Super-oleophobic coating and preparation method thereof
  • Super-oleophobic coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0059] By magnetic stirring and ultrasonic dispersion, 0.1 g of fumed silica nanoparticles (with a specific surface area of ​​300m 2 / g) dispersed in 10g TrisHCl buffer solution to prepare a uniform and stable dispersion, adding dopamine hydrochloride to form a composite dispersion with a dopamine hydrochloride concentration of 0.5 mg / mL. The above dispersion liquid was magnetically stirred under the condition of being connected to the atmosphere, and reacted for 24 hours to polymerize dopamine into polydopamine.

[0060] According to 60μL / cm 2 The dosage is to apply the dispersion liquid on the glass surface, freeze it at -80°C and freeze-dry it. Afterwards, the coating was subjected to two-step CVD treatment: the first step, CVD treatment with 1 mL aminopropyltriethoxysilane at 25 °C for 24 hours; the second step, 300 μL 1H, 1H, 2H, 2H-all at 25 °C Fluorodecyltriethoxysilane was subjected to CVD treatment for 24 hours. Finally, the superoleophobic coating ( figure 1 ). ...

Embodiment 2

[0063] By magnetic stirring and ultrasonic dispersion, 0.3g fumed silica nanoparticles (specific surface area is 100m 2 / g) dispersed in 10g TrisHCl buffer solution to prepare a uniform and stable dispersion, adding dopamine hydrochloride to form a composite dispersion with a dopamine hydrochloride concentration of 1mg / mL. The above dispersion liquid was magnetically stirred under the condition of being connected to the atmosphere, and reacted for 24 hours to polymerize dopamine into polydopamine.

[0064] According to 60μL / cm 2 The dosage is to apply the dispersion liquid on the glass surface, freeze it at -80°C and freeze-dry it. Afterwards, the coating was subjected to two-step CVD treatment: the first step, CVD treatment with 1 mL aminopropyltriethoxysilane at 25 °C for 24 hours; the second step, 300 μL 1H, 1H, 2H, 2H-all at 25 °C Fluorodecyltriethoxysilane was subjected to CVD treatment for 24 hours. Finally, a super-oleophobic coating is obtained.

[0065] The value ...

Embodiment 3

[0067] By magnetic stirring and ultrasonic dispersion, 0.3g fumed silica nanoparticles (specific surface area is 200m 2 / g) dispersed in 10g TrisHCl buffer solution to prepare a uniform and stable dispersion, adding dopamine hydrochloride to form a composite dispersion with a dopamine hydrochloride concentration of 0.5 mg / mL. The above dispersion liquid was magnetically stirred under the condition of being connected to the atmosphere, and reacted for 24 hours to polymerize dopamine into polydopamine.

[0068] According to 20μL / cm 2 The dosage is to apply the dispersion on the glass surface, freeze it at -40°C and freeze-dry it. Afterwards, the coating was subjected to two-step CVD treatment: the first step, CVD treatment with 1 mL aminopropyltriethoxysilane at 40 °C for 24 hours; the second step, 300 μL 1H, 1H, 2H, 2H-all Fluorodecyltriethoxysilane was subjected to CVD treatment for 24 hours. Finally, a super-oleophobic coating is obtained.

[0069] The value of the contac...

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Abstract

The invention discloses a super-oleophobic coating material and a preparation method thereof. A super-oleophobic coating is obtained by establishing a porous coating through an ice template with gas-hpase silicon dioxide nanoparticles and dopamine as structure units and conducting processing through a two-step CVD method. The preparation method is green and environmentally friendly, and can not pollute the environment. The super-strong adhesive capacity of polydopamine is achieved through biological material-dopamine polymerization. The super-oleophobic coating can be applied to metal materials, inorganic nonmetallic materials, polymer materials, natural materials and the like, and a solution of the super-oleophobic coating universal for various different materials is provided.

Description

technical field [0001] The invention relates to the technical field of oleophobic coating materials, in particular to a super oleophobic coating and a preparation method thereof. Background technique [0002] A superoleophobic surface refers to a surface that can exhibit a static contact angle greater than 150° for liquid droplets with low surface tension (typically less than 30 mN / m). Due to its excellent anti-wetting behavior to oil and organic solvents, the superoleophobic coating can better protect the surface of the material from oil pollution. [0003] According to the existing research results, the preparation of super-oleophobic surfaces is generally prepared by surface etching technology to construct a surface with a special microstructure or to treat fabrics and screens. These two methods are often only applicable to specific materials. , it is difficult to become a superoleophobic surface preparation method that can be used on the surface of different materials. ...

Claims

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Application Information

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IPC IPC(8): C09D179/02C09D7/12C08J7/12
Inventor 杜淼李房郑强
Owner ZHEJIANG UNIV
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