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Preparation method of super-hydrophobic and oleophobic coating

A superhydrophobic and oleophobic technology, applied in the field of preparation of superhydrophobic and oleophobic coatings, can solve the problems of complexity, still in the laboratory stage, and low preparation efficiency.

Pending Publication Date: 2022-07-22
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Etching can accurately construct micro-nano structures, but requires complex and sophisticated instruments; electrospinning can construct multi-level rough structures, but the preparation efficiency is low, and most of the research is still in the laboratory stage

Method used

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  • Preparation method of super-hydrophobic and oleophobic coating
  • Preparation method of super-hydrophobic and oleophobic coating
  • Preparation method of super-hydrophobic and oleophobic coating

Examples

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preparation example Construction

[0022] A preparation method of a super-hydrophobic and oleophobic coating, comprising the following steps: firstly dispersing nanoparticles in an ethanol solvent, the weight ratio of the nanoparticles to the ethanol is (1-4):190, then adding fluorine-containing organosilane, The weight ratio of particle to fluorine-containing organosilane is (1-4):(1-16),

[0023] Wherein the nanoparticles are at least one of cellulose nanofibers, cellulose nanocrystals, nano-silicon dioxide, nano-titanium dioxide, nano-zinc oxide, nano-alumina, carbon nanotubes, graphene and graphene oxide;

[0024] The fluorine-containing organosilane is perfluorododecyltrichlorosilane, heptadecafluorodecyltrimethoxysilane, perfluorooctyltrichlorosilane, perfluorooctyltrimethoxysilane, perfluorooctyltriethoxysilane Perfluorodecyltrichlorosilane, perfluorodecyltrichlorosilane, perfluorodecyltrimethoxysilane, perfluorodecyltriethoxysilane, perfluorooctyldimethylchlorosilane, perfluorooctyldimethylmethoxysilane...

Embodiment 1

[0028] The present embodiment provides a method for preparing a superhydrophobic oleophobic coating, comprising the following steps:

[0029] Disperse 0.4 g of graphene oxide in 25 g of ethanol, sonicate for 20 min, then add 0.4 g of perfluorooctyltriethoxysilane, and magnetically stir for 5 hours to obtain a suspension. The polyurethane adhesive was coated on the glass surface, and then the suspension was sprayed on it and cured at room temperature to obtain a superhydrophobic and oleophobic coating.

[0030] like figure 1 As shown, the resulting coating has a water contact angle of 164.5° (left of the figure) and a contact angle of n-hexadecane of 142.7° (right of the figure).

Embodiment 2

[0032] The present embodiment provides a method for preparing a superhydrophobic oleophobic coating, comprising the following steps:

[0033] Disperse 0.2 g of carbon nanotubes in 25 g of ethanol, sonicate for 20 min, then add 0.4 g of perfluorododecyltrichlorosilane, and magnetically stir for 5 hours to obtain a suspension. The epoxy resin adhesive is coated on the glass surface, and then the suspension is sprayed on it, and cured at room temperature to obtain a superhydrophobic and oleophobic coating.

[0034] like figure 2 As shown, the resulting coating has a water contact angle of 168.9° (left of the figure) and a contact angle of n-hexadecane of 140.2° (right of the figure).

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Abstract

The invention discloses a preparation method of a super-hydrophobic and oleophobic coating, and particularly relates to the field of functional materials. The preparation method comprises the following steps: firstly, dispersing nanoparticles in an ethanol solvent, then adding fluorine-containing organosilane, and stirring at room temperature for 5 hours to obtain a uniformly mixed suspension; and coating the adhesive on the surface of a substrate material, then coating the suspension on the adhesive, and curing at room temperature to obtain the super-hydrophobic and oleophobic coating. The coating constructs a multi-stage micro-nano structure, is good in stability and simple in preparation method, can be applied to various substrate materials on a large scale, and is beneficial to industrial production.

Description

technical field [0001] The technical field of the method for preparing the functional material of the present invention, in particular, relates to a method for preparing a superhydrophobic and oleophobic coating. Background technique [0002] There are many self-cleaning phenomena in nature. The synergistic effect of the micron-sized papillae on the surface of the lotus leaf and the nano-sized wax-like crystals on the surface of the papillae makes the water droplets take away the dust and debris on the surface of the lotus leaf when they roll down. Butterfly wings also have superhydrophobic properties with special orientation adhesion. Inspired by this, the surface of the material was hydrophobically modified and used for antifouling, oil-water separation, and anti-corrosion applications. [0003] However, due to the complexity of the environment, a single hydrophobic coating has been unable to meet the needs of industry and life. Coatings with both hydrophobic and oleo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/08C09D7/61C09D7/65B05C9/06B05D3/00B05D3/04
CPCC09D183/08C09D7/61C09D4/00C09D7/65C09D7/70B05C9/06B05D3/0406B05D3/007C08G77/24C08K2003/2241C08L1/02C08K3/042C08K3/041C08K3/36C08K3/22
Inventor 马敬红葛岩梅龚静华
Owner DONGHUA UNIV