Water-based super-amphiphobic paint as well as preparation method and application thereof

A super-amphiphobic and coating technology, which is applied in coatings and other directions, can solve the problems of volatile organic solvents, rising coating costs, and unfavorable transportation, etc., and achieve the effects of reducing production costs, low VOC, and good application prospects

Inactive Publication Date: 2018-07-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a common problem in the superhydrophobic field so far is that it cannot prevent liquids with low surface energy such as edible oil and hexadecane, and even has a good affinity for these oils.
These

Method used

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  • Water-based super-amphiphobic paint as well as preparation method and application thereof
  • Water-based super-amphiphobic paint as well as preparation method and application thereof
  • Water-based super-amphiphobic paint as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix 4mL ammonia water (mass fraction 28%, the same below) and 80mL deionized water, add 1.2g aqueous silica sol (pH=2-4, diameter 9-15nm, chain length 40-100nm, silica mass concentration 10-20%) and 0.5g cationic fluorocarbon surfactant DuPont ForaperLe323, stir and disperse evenly. Afterwards, 0.6 mL of tetraethyl orthosilicate was added dropwise, and after stirring for 30 min, 0.6 mL of fluorosilane was added dropwise, and the aqueous superamphiphobic coating was obtained after magnetic stirring at 45° C. for 24 h. Then spray the coating on the glass slide at a high temperature of 160°C to obtain a water-based super-amphiphobic coating with a micro-nano composite structure. figure 1 A scanning electron microscope image of the coating.

Embodiment 2

[0029] The paint described in Example 1 was sprayed on the tinplate sheet and placed in a humid environment for 4 hours. Observe the formation of water droplets on the tinplate sheet every hour. The results show that part of the water vapor coated with the super-amphiphobic coating is difficult to grow on it, and there are only small water droplets on the surface after 4 hours. Whereas the water vapor nucleation speed was fast in the uncoated part, and the size of water droplets was large after 4 hours. This indicates that the superamphiphobic coating has excellent anti-condensation performance. figure 2 is an optical photograph of a partially coated tinplate sheet placed in a humid environment.

Embodiment 3

[0031] Mix 4mL ammonia water and 80mL deionized water evenly, add 1.2g aqueous silica sol (pH=2-4, diameter 9-15nm, chain length 40-100nm, silica weight concentration 10-20%) and 0.5g anionic Fluorocarbon surfactant DuPontCapstoneFS-61, stir and disperse evenly. Afterwards, 0.6 mL of tetraethyl orthosilicate was added dropwise, and after stirring for 30 min, 0.6 mL of fluorosilane was added dropwise, and the aqueous superamphiphobic coating was obtained after magnetic stirring at 45° C. for 24 h. Then spray the coating on the glass slide at a high temperature of 300°C to obtain a water-based super-amphiphobic coating with a micro-nano composite structure. Its cetane contact angle is 160° and rolling angle is 3°. image 3 Optical picture of the contact angle of the coating (droplets are hexadecane).

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PUM

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Abstract

The invention relates to water-based super-amphiphobic paint as well as a preparation method and application thereof. The water content in the paint is 60 to 99 percent; a film can be formed by a spray coating, soaking pulling, brush coating and roller coating method; after the high-temperature curing for 5 min to 2h, a super-amphiphobic coating with the water drop contact angle being greater than165 degrees, water drop rolling angle being smaller than 5 degrees, oil drop contact angle being 155 degrees and the oil drop rolling angle being smaller than 10 degrees can be obtained on the surface of a substrate. The preparation method has the advantages that the process is simple; green and environment-friendly effects are achieved; no harm is caused on the human body and the environment. The paint has the wide application in the fields of fiber treatment, self cleaning, moisture condensation resistance and the like.

Description

technical field [0001] The invention belongs to the field of material surface treatment, and relates to a water-based superamphiphobic coating and a preparation method and application thereof. Background technique [0002] Superhydrophobic surfaces (contact angle > 150°, rolling angle less than 10°) have been favored by scholars all over the world due to their great application prospects in self-cleaning, anti-icing, oil-water separation, condensation heat transfer, water collection, etc. extensive attention. At present, the preparation of superhydrophobic surfaces is mainly by constructing rough structures on the surface of materials and modifying them with low surface energy substances, or directly constructing rough structures on the surfaces of low surface energy materials. However, a common problem in the superhydrophobic field so far is that it cannot prevent liquids with low surface energy such as edible oil and hexadecane, and even has a good affinity for these...

Claims

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Application Information

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IPC IPC(8): C09D1/00C09D7/63
Inventor 张友法姚道州王山林余新泉
Owner SOUTHEAST UNIV
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