Super-hydrophobic coating with raspberry-like structured composite particles and preparation method thereof

A composite particle, super-hydrophobic technology, applied in microsphere preparation, coating, microcapsule preparation and other directions, can solve the problems of raspberry-like particle stability affected by system environment, complicated preparation steps, low practical application, etc. Coating method is simple and easy, strong super-hydrophobicity, easy to operate effect

Inactive Publication Date: 2017-06-30
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although many studies have shown that the prepared raspberry-shaped particles have superhydrophobic properties, it is found that the preparation steps are cumbersome, the reagents and drugs used are highly toxic, and the stability of raspberry-shaped particles is affected. The impact of the system environment is relatively large, and the practical application is far lower than the theoretical research. Therefore, how to obtain a stable raspberry-like particle with controllable structure, regular shape, and high preparation efficiency is the focus and difficulty of research. where the

Method used

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  • Super-hydrophobic coating with raspberry-like structured composite particles and preparation method thereof
  • Super-hydrophobic coating with raspberry-like structured composite particles and preparation method thereof
  • Super-hydrophobic coating with raspberry-like structured composite particles and preparation method thereof

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preparation example Construction

[0031] The preparation method of the superhydrophobic coating of the organic-inorganic composite raspberry particle of above-described embodiment comprises the following process:

[0032] The first step: prepare or select the polymer spherical core as the primary structure; take polyacrylic acid microspheres as an example, use the precipitation distillation polymerization method, take a certain amount of ethylene glycol dimethacrylate and acrylic acid and disperse them in acetonitrile, add The initiator, azobisisobutyronitrile, is heated from room temperature to boiling of the solution within 15 minutes, and after maintaining for 5 minutes, the solvent is evaporated until half of the solvent is evaporated, and the reaction is completed, centrifuged, and the obtained solid is washed three times and then dried. Obtain polymer microspheres.

[0033] Step 2: Weigh the ball (core) and disperse it in an organic solvent, sonicate for 10 minutes, add organic solvent, distilled water a...

Embodiment 1

[0037] Weigh 0.1g of polyacrylic acid microspheres (using precipitation distillation polymerization method, take a certain amount of ethylene glycol dimethacrylate and acrylic acid and disperse them in acetonitrile, add initiator azobisisobutyronitrile, and heat up from room temperature within 15min After the solution boils and is maintained for 5 minutes, the solvent is evaporated until half of the solvent is evaporated, the reaction is completed, centrifuged, the obtained solid is washed three times and then dried to obtain polymer microspheres.) Place in a 250mL clean and dry three-necked flask , add 80mL of ethanol, and ultrasonically disperse to make it evenly mixed. Add 6mL water, 6mL ammonia water and stir at room temperature for 2h, then add 1mL tetraethyl orthosilicate, 1mL 1H,1H,2H,2H-perfluorodecyltriethoxysilane at the same time, stir vigorously for 8h to obtain a superhydrophobic coating , spread it on a glass slide, dry it at room temperature, and measure its con...

Embodiment 2

[0039]Take by weighing 0.1g polymethacrylic acid microspheres (using the precipitation distillation polymerization method, get a certain amount of ethylene glycol dimethacrylate and acrylic acid and disperse them in acetonitrile, add initiator azobisisobutyronitrile, within 15min by Room temperature is heated to the boiling point of the solution, and after maintaining for 5 minutes, the solvent is evaporated until half of the solvent is evaporated, and the reaction is completed, centrifuged, and the obtained solid is washed three times and then dried to obtain polymer microspheres.) Placed in a 250mL clean and dry In a three-neck flask, add 80 mL of ethanol, and ultrasonically disperse to make it evenly mixed. Add 6mL water, 6mL ammonia water and stir at room temperature for 2h, then add 1mL tetraethylorthosilicate, 1mL1H,1H,2H,2H-perfluorodecyltriethoxysilane at the same time, and stir vigorously for 8h to obtain a superhydrophobic coating. Spread it on a glass slide, dry it ...

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Abstract

The invention discloses a superhydrophobic coating with a raspberry-like structure composite particle and a preparation method thereof. The superhydrophobic composite raspberry particle has a two-level hierarchical structure, and is composed of a polymer nanoparticle with a diameter of 10nm to 1000nm. The spherical core is composed of multiple smaller inorganic nanospheres attached to it. Among them, the organic spherical core refers to the polymer nanosphere with a diameter of 10nm to 1000nm, and the inorganic pellet is formed by the reaction of the following main raw materials on the spherical core according to the mass percentage: organic solvent: 70.02-90.75%; catalyst: 5.18-8.85% %; water: 5.85-8.89%; silicate: 1.12-2.02%; fluorine-containing silane coupling agent: 0.14-1.54%. Because the composite raspberry particles of the invention have a secondary hierarchical structure, the surface roughness can be increased; and the fluorine-containing silane coupling agent can effectively reduce the surface free energy, and finally a superhydrophobic coating can be prepared. The superhydrophobic coating of the present invention can be coated by various methods, including spraying, scraping, and soaking, without affecting its superhydrophobicity.

Description

technical field [0001] The invention relates to the technical field of superhydrophobic coatings and preparation methods thereof, in particular to a composite particle superhydrophobic coating with a raspberry-like structure and a preparation method thereof. Background technique [0002] Raspberry particles refer to a kind of organic or inorganic particles with relatively small size attached to larger particles by physical or chemical methods, which have large specific surface area, high roughness and high light scattering. Particles shaped like raspberries. Due to its special secondary structure, it has very broad application prospects in superhydrophobic coatings, drug delivery, etc. Therefore, the present invention mainly revolves around the application of raspberry-like composite particles in superhydrophobicity. [0003] The super-hydrophobic coating means that the stable contact angle is greater than 150°, while the rolling contact angle is less than 10°, like a lotu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/02C09D125/06C09D7/12B01J13/02
CPCC09D133/02B01J13/02C08K7/18C09D7/70C09D125/06
Inventor 姜勇邰丽赵正柏张大明
Owner SOUTHEAST UNIV
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