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Method for preparing stable super-hydrophobic surface on complex modeling base material at super-fast speed

A super-hydrophobic surface and ultra-fast technology, which is applied in the direction of surface coating liquid devices, special surfaces, coatings, etc., can solve the problems of poor mechanical stability of super-hydrophobic coatings, and achieve excellent super-hydrophobic performance and excellent chemical stability Sexuality and wide application prospects

Active Publication Date: 2022-07-22
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for super-fast preparation of a stable super-hydrophobic surface on complex modeling substrates, so as to realize rapid The preparation of a stable superhydrophobic surface can effectively solve the problem of poor mechanical stability of the current superhydrophobic coating, and at the same time realize the low-cost, rapid and large-scale preparation of the superhydrophobic coating

Method used

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  • Method for preparing stable super-hydrophobic surface on complex modeling base material at super-fast speed
  • Method for preparing stable super-hydrophobic surface on complex modeling base material at super-fast speed
  • Method for preparing stable super-hydrophobic surface on complex modeling base material at super-fast speed

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Experimental program
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Effect test

Embodiment 1

[0036] (1) Add 2wt% of hydrophilic silica particles to a mixture of ammonia water and ethanol with a volume ratio of 1:20. After ultrasonication and stirring, add ethyl orthosilicate and perfluorodecyltriethoxysilane. , and stirred at room temperature for 2-4 h to obtain a suspension of fluorinated micro-nano particles. Among them, the addition amount of perfluorodecyl triethoxysilane is 2% of the whole system volume, and the addition amount of ethyl orthosilicate is 0.6% of the whole system volume. After the suspension is centrifuged, the solvent is replaced with butyl acetate to obtain a semi-solid product of fluorinated micro-nano particles.

[0037] (2) 1.44g of poly(styrene-co-isoprene) was completely dissolved in 2.66g of butyl acetate, and then 5.5g of the above-mentioned fluorinated micro-nanoparticle semi-solid product (solid content of 20%) was uniformly Disperse in poly(styrene-co-isoprene) solution, sonicate and stir for 2~3 times; finally, slowly add 1.85g ethano...

Embodiment 2

[0043] (1) Add 2wt% of attapulgite powder to a mixture of ammonia water and ethanol with a volume ratio of 1:15. After ultrasonication and stirring, ethyl orthosilicate and perfluorodecyltrimethoxysilane are added, and the reaction is stirred at room temperature. After 2-4 h, a fluorinated micro-nano particle suspension was obtained. Wherein, the addition amount of perfluorodecyltrimethoxysilane is 2% of the whole system volume, and the addition amount of ethyl orthosilicate is 0.5% of the whole system volume. After the suspension is centrifuged, the solvent is replaced with butyl acetate to obtain a semi-solid product of fluorinated micro-nano particles.

[0044] (2) 1.86g of poly(styrene-co-isoprene) was completely dissolved in 3.72g of ethyl acetate, and then 4.4g of the above fluorinated micro-nanoparticle semi-solid product (solid content was 25%) Uniformly dispersed in the poly(styrene-co-isoprene) solution, ultrasonicated and stirred for 2~3 times; finally, 3 g of etha...

Embodiment 3

[0048] (1) Add 2wt% of hydroxylated carbon nanotube powder into a mixture of ammonia water and ethanol with a volume ratio of 1:15, after ultrasonication and stirring evenly, add ethyl orthosilicate and perfluorodecyltriethoxysilane , and the reaction was stirred at room temperature for 2-4 h to obtain a suspension of fluorinated micro-nano particles. Among them, the addition amount of perfluorodecyl triethoxysilane is 2.2% of the whole system volume, and the addition amount of ethyl orthosilicate is 0.8% of the whole system volume. After the suspension is centrifuged, the solvent is replaced with butyl acetate to obtain a semi-solid product of fluorinated micro-nano particles.

[0049] (2) Dissolve 2.4g of polyurethane completely in 8.6g of acetone, then disperse 7.36g of the above-mentioned fluorinated micro-nanoparticle semi-solid product (solid content of 30%) evenly in the polyurethane solution, ultrasonically and stir for 2~3 time; finally, 2.6 g of isopropanol was slow...

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Abstract

The invention discloses a method for preparing a stable super-hydrophobic surface on a complex modeling base material in an ultra-fast mode. The preparation method comprises the following steps: firstly, carrying out hydrophobic modification on micro-nano particles by using fluorosilane and tetraethoxysilane to prepare fluorinated micro-nano particles, and carrying out solvent replacement by using butyl acetate; secondly, an adhesive is dissolved in a good solvent, the fluorinated micro-nano particles subjected to solvent replacement are dispersed in the good solvent, a poor solvent is gradually added to induce the adhesive to be subjected to phase separation, the fluorinated micro-nano particles are exposed on the outer layer of the adhesive particles, and uniform emulsion is prepared; and finally, preparing the stable super-hydrophobic coating on various substrates with complex shapes by adopting a dip-coating method. The super-hydrophobic surface provided by the invention has excellent super-hydrophobic performance, good mechanical stability, chemical stability and thermal stability. In addition, the method is suitable for substrates of various complex shapes, low-cost, large-scale and rapid preparation can be achieved, and the method has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of super-hydrophobic coatings, and relates to a method for preparing a super-hydrophobic surface, in particular to an ultra-fast method for preparing a stable super-hydrophobic surface on complex substrates of various materials. Background technique [0002] Over the past 20 years, inspired by the self-cleaning properties of lotus leaves, superhydrophobic surfaces have attracted academia and industry in diverse fields such as self-cleaning, water treatment, oil-water separation, waterproof textiles, anti-icing, anti-corrosion, energy storage, and biomedicine. wide attention in the world. It is well known that certain rough structures can be combined with low surface energy materials to prepare superhydrophobic surfaces. Following this line of thought, various methods, such as sol-gel method, template method, etching method, vapor deposition method, electrochemical method, hydrothermal method, and spraying m...

Claims

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Application Information

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IPC IPC(8): C09D125/10C09D163/00C09D175/04C09D7/62B05D7/24B05D5/00
CPCC09D125/10C09D175/04C09D163/00C09D7/62B05D7/24B05D5/00C08K9/06C08K3/36C08K3/346C08K3/041C08K7/26
Inventor 张俊平张娇娇张荣魏晋飞李步成
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI