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A kind of waterborne superhydrophilic superoleophobic coating and its preparation method and application

A super-hydrophilic and super-oleophobic technology, used in antifouling/underwater coatings, anti-corrosion coatings, polyurea/polyurethane coatings, etc. focus effect

Active Publication Date: 2021-03-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[References: Scientific Reports 2015, 5, 14030] But this preparation process is complicated, in addition, the preparation process also uses organic solvents such as acetone and ethanol

Method used

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  • A kind of waterborne superhydrophilic superoleophobic coating and its preparation method and application
  • A kind of waterborne superhydrophilic superoleophobic coating and its preparation method and application
  • A kind of waterborne superhydrophilic superoleophobic coating and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] At room temperature, add 4g of water-based anionic fluorocarbon surfactant with six carbon fluorochains, 0.1g of sodium tripolyphosphate, 1g of polyether modified silicone leveling agent, and 2g of polyvinylpyrrolidone into 80g of deionized water, at 150 rpm After stirring magnetically for 20 minutes at a speed of 1 minute, add 3 g of hydrophilic fumed nano-silica particles with a particle size of 10 nm and 1 g of silicon micropowder with a particle size of 1 micron, stir magnetically at a speed of 150 rpm for 30 minutes, and then add 6 g A mixed solution of polyurethane and 3g of acrylic acid was magnetically stirred at a speed of 130 rpm for 30 minutes to obtain a water-based superhydrophilic and superoleophobic coating. The obtained coating is coated on the fiber cloth by spraying, and the obtained fiber cloth is put into an oven at 80° C. for 30 minutes to cure to obtain a super-hydrophilic and super-oleophobic coating. figure 1 It is the SEM image of the surface mo...

Embodiment 2

[0026] At room temperature, the mixed solution of 3.5g water-based polyurethane fluorocarbon surfactant and 1g water-based anionic fluorocarbon surfactant of hexafluorocarbon chain, 0.1g part of sodium hexametaphosphate, 2g polyether modified silicone leveling agent , 4g of polyvinyl alcohol was added to 60g of deionized water, and after magnetic stirring at a speed of 250 rpm for 20min, 2.5g of hydrophilic gas-phase nano-silica particles with a particle size of 40 nm and 1.2g of particle size with a particle size of 10 microns were added. After magnetically stirring at a speed of 300 rpm for 30 min, 6 g of aqueous acrylic acid solution was added, and magnetically stirred at a speed of 150 rpm for 30 min to obtain a water-based superhydrophilic and superoleophobic coating. The obtained coating is coated on the stainless steel mesh by the method of dipping, and the obtained stainless steel mesh is put into an oven at 100° C. for 25 minutes to cure to obtain a super-hydrophilic a...

Embodiment 3

[0028] At room temperature, add 6.5g perfluoroalkyldiethanolamine phosphate surfactant, 0.1g sodium hexametaphosphate and 0.1g sodium pyrophosphate mixed solution, 4g polyether modified silicone leveling agent, 3g polyvinyl alcohol 90g of deionized water, after magnetically stirring at a speed of 350 rpm for 20min, then add 3g of hydrophilic gas-phase nano-silica particles with a particle diameter of 30 nm and 1.8g of silicon micropowder with a particle diameter of 10 microns, and stir at 400 rpm After 30 minutes of magnetic stirring at a speed of 300 rpm, 11.7 g of aqueous acrylic acid solution was added, and magnetic stirring was performed at a speed of 300 rpm for 30 minutes to obtain a water-based superhydrophilic and superoleophobic coating. The obtained coating is coated on the fiber membrane by spraying, and the obtained fiber membrane is put into an oven at 150° C. for 20 minutes to cure to obtain a super-hydrophilic and super-oleophobic coating. image 3 It is the con...

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Abstract

A water-based super-hydrophilic super-oleophobic coating and a preparation method and application thereof. At room temperature, a water-based fluorocarbon surfactant, a polyether-modified silicone leveling agent, a dispersant, a thickener, and deionized water are added to react Stir in the kettle; then add hydrophilic fumed silica nanoparticles and silicon micropowder and stir; finally add water-based resin and stir. The method can realize super-hydrophilic and super-oleophobic in air, is simple and easy to implement, avoids the use of organic solvents, and only uses water as the solvent.

Description

technical field [0001] The invention relates to the field of new chemical materials, in particular to a water-based super-hydrophilic and super-oleophobic coating and its preparation method and application. Background technique [0002] The discharge of oily wastewater and offshore oil spills have brought damage to the environment. As a special wetting coating, the superhydrophilic and superoleophobic coating can separate oil and water according to the wettability of water droplets and oil droplets on its surface. The oil and water in the mixed liquid are separated, which is an efficient oil-water separation tool and has application prospects in the treatment of oil pollution. At present, one of the oleophobic methods is underwater oleophobic. For example, Chinese patent CN106634275A reports that a superhydrophobic acid resin and its curing agent are used as a primer, and polyvinyl alcohol and its nanoparticles are used as a topcoat. Hydrophilic / underwater superoleophobic c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/04C09D133/04C09D5/16C09D5/08C09D7/20
Inventor 张友法刘思齐余新泉
Owner SOUTHEAST UNIV
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