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A superhydrophobic surface with a stable gas-liquid interface under water and its preparation method

A super-hydrophobic surface, gas-liquid interface technology, applied to special surfaces, devices for coating liquids on surfaces, coatings, etc., can solve the problems of high cost, difficult mass production, complex synthesis, etc. Easy-to-operate effects

Active Publication Date: 2022-01-14
深圳市海石设计工程企业
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this high-performance coating requires the use of a material with strong hydrophobicity - "fluorinated cage polysilsesquioxane", which is very complicated to synthesize, extremely expensive, and still difficult to mass-produce

Method used

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  • A superhydrophobic surface with a stable gas-liquid interface under water and its preparation method
  • A superhydrophobic surface with a stable gas-liquid interface under water and its preparation method
  • A superhydrophobic surface with a stable gas-liquid interface under water and its preparation method

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preparation example Construction

[0058] The present invention provides a method for preparing a superhydrophobic surface with a stable gas-liquid interface under water described in the above technical solution. As an embodiment of the present invention, the preparation method provided by the present invention includes the following steps:

[0059] Mixing the hydrophilic coarse particle filler, the first curing agent, the binder and the first volatile organic solvent to obtain the primary roughness hardened hydrophilic layer puree;

[0060] Mixing the viscoelastic organic matter with the second volatile organic solvent to obtain the original slurry of the external force slow-release layer;

[0061] mixing the fine solid particle filler, film-forming agent, hydrophobic modifier and a third volatile organic solvent to obtain a secondary roughness hydrophobic layer slurry;

[0062] On the surface of the target substrate, apply the original slurry of the first-level roughness hardened hydrophilic layer, the origin...

Embodiment 1

[0075] A superhydrophobic surface with a stable gas-liquid interface under water, the preparation method is as follows:

[0076] First-level roughness hardened hydrophilic layer puree preparation: Weigh 2g of river sand (screened size 150-120 micron) particles and mix them evenly with 40g of absolute ethanol, then add 2g of epoxy resin in acetone solution (concentration is 50wt%) , the resulting mixture was ultrasonically stirred for 10 minutes and then magnetically stirred for 2 hours to obtain a first-order roughness hardened hydrophilic layer puree without curing agent.

[0077] Preparation of primary slurry for secondary roughness hydrophobic layer: 0.5g nano-scale SiO 2 The powder (size 7-50nm) was dispersed in 50g of absolute ethanol to form a dispersion liquid, and after ultrasonic treatment of the dispersion liquid for 30min, an acetone solution of 1.2g perfluorooctyltrimethoxysilane and 0.1g epoxy resin was added to the dispersion liquid ( The concentration is 50wt%)...

Embodiment 2

[0082] A superhydrophobic surface with a stable gas-liquid interface under water, the preparation method is as follows:

[0083] Primary roughness hardened hydrophilic layer puree preparation: Mix 10g hollow glass microspheres (50μm~80μm) and 5g solid silica microspheres (100μm~150μm) evenly, weigh 5g of the above powder and 40g absolute ethanol After mixing, 2 g of epoxy resin in acetone solution with a concentration of 50 wt % was added; the resulting mixed solution was ultrasonically stirred for 10 min and then magnetically stirred for 2 h to obtain a primary roughness hardened hydrophilic layer slurry without curing agent.

[0084] Preparation of secondary roughness hydrophobic layer: 0.5g nano-scale SiO 2 The powder (7-50nm) was dispersed in 50g of absolute ethanol to form a dispersion liquid, and after ultrasonic treatment of the dispersion liquid for 30min, 1.2g of perfluorooctyltrimethoxysilane and 0.2g of polyurethane tetrahydrofuran solution (concentration of 50wt %...

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Abstract

The invention provides a superhydrophobic surface with a stable gas-liquid interface under water and a preparation method thereof, and relates to the technical field of superhydrophobic materials. The super-hydrophobic surface provided by the present invention comprises a primary roughness hardened hydrophilic layer, an external force slow-release layer and a secondary roughness hydrophobic layer, and the external force slow-release layer penetrates into the gap of the primary roughness hardened hydrophilic layer and does not Submerging the first-level roughness hardened hydrophilic layer, the second-level roughness hydrophobic layer is attached to the surface of the first-level roughness hardened hydrophilic layer and the external force slow-release layer; or, including the first-level roughness hardened hydrophilic layer and the second-level A roughness hydrophobic layer, the secondary roughness hydrophobic layer is attached to the surface of the primary roughness hardened hydrophilic layer. The superhydrophobic surface with a stable gas-liquid interface under water provided by the present invention has excellent superhydrophobicity and long-term underwater solid-gas characteristics, and has extremely high structural stability and wide adaptability to substrates. Non-toxic, harmless, easy to obtain, can greatly reduce costs, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of superhydrophobic materials, in particular to a superhydrophobic surface with a stable gas-liquid interface under water and a preparation method thereof. Background technique [0002] The superhydrophobic property (lotus leaf effect) is an extremely hydrophobic material surface property, and the surface with superhydrophobic properties (such as the lotus leaf surface) generally has low surface energy and a certain roughness. Because water droplets are composed of polar molecules, it is extremely difficult to adhere to the superhydrophobic surface. Once the water droplets touch the superhydrophobic surface, the water droplets cannot spread on the superhydrophobic surface. Rolling off the surface (rolling angle is extremely small, generally less than 5°). The surface with super-hydrophobic properties is theoretically extremely difficult to be wetted by water. Even if it is submerged in water, a temporary ai...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/00C09D7/61C09D183/08B05D7/24B05D5/00B05D7/00
CPCC09D163/00C09D7/61C09D183/08C09D7/70B05D7/24B05D5/00B05D7/586B05D7/546B05D2504/00C08K3/36C08K7/28C08K7/18C08K7/08C08L63/00C08L75/04
Inventor 杨啸
Owner 深圳市海石设计工程企业