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Superhydrophobic powder coating, and preparation method and application thereof

A powder coating and super-hydrophobic technology, which is applied in the field of material chemistry, can solve problems such as inability to guarantee hydrophobic effect and poor wear resistance, and achieve excellent durability, prevent pollution, and reduce environmental pollution.

Inactive Publication Date: 2018-02-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its wear resistance is not good, and it cannot guarantee that it will still have a strong hydrophobic effect after wear.

Method used

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  • Superhydrophobic powder coating, and preparation method and application thereof
  • Superhydrophobic powder coating, and preparation method and application thereof
  • Superhydrophobic powder coating, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Preparation of hydrophobically modified powder: use silica sol silica powder modified by fluorosilane and TEOS as hydrophobically modified powder, use absolute ethanol as solvent, add ammonia water and deionized water, then add dropwise aqueous silica sol, When stirring, add fluorosilane and TEOS dropwise, stir for 24 hours, dry and grind into powder, the particle size of powder is 10-50 μm;

[0036] (2) Hydrophobic modified powder and resin powder blending: the resin adopts solid powdered PTFE resin, and the mesh number is 250 mesh. After the resin powder is heated to the melting point to make it melt, according to "hydrophobic modified powder: resin = 1: 4” mass ratio, add hydrophobic powder and continue to stir, melt and extrude, and dry in an oven at 80°C, press the dried product into tablets, crush it, and finally grind it into powder with a particle size of 10-50 μm, disperse in butyl acetate Add 3-4 drops of fluorosilane dropwise to the solution, and place it...

Embodiment 2

[0043](1) Preparation of hydrophobically modified powder: use silica sol silica powder modified by fluorosilane and TEOS as hydrophobically modified powder, use absolute ethanol as solvent, add ammonia water and deionized water, then add dropwise aqueous silica sol, When stirring, add fluorosilane and TEOS dropwise, stir for 24 hours, dry and grind into powder, the particle size of powder is 10-50 μm;

[0044] (2) Hydrophobic modified powder and resin powder blending: the resin adopts solid powdered thermoplastic polyurethane resin, and the number of mesh is 800 mesh. : 1” mass ratio, add hydrophobic powder and continue to stir, melt and extrude, and dry in an oven at 80°C, press the dry matter, crush it, and finally grind it into powder with a particle size of 10-50 μm, disperse in butyl acetate In the ester solution, add 3-4 drops of fluorosilane dropwise, and place it in an ultrasonic instrument for 5-10 minutes;

[0045] (3) Prepare a superhydrophobic coating on the surfa...

Embodiment 3

[0052] (1) Preparation of hydrophobically modified powder: use silica sol silica powder modified by fluorosilane and TEOS as hydrophobically modified powder, use absolute ethanol as solvent, add ammonia water and deionized water, then add dropwise aqueous silica sol, When stirring, add fluorosilane and TEOS dropwise, stir for 24 hours, dry and grind into powder, the particle size of powder is 10-50 μm;

[0053] (2) Blending of hydrophobic modified powder and resin powder: the resin is a polyester resin in the form of a solid powder with a mesh number of 500 mesh. After the resin powder is heated to the melting point to melt it, follow the "hydrophobic modified powder: Resin = 2:1" mass ratio, add hydrophobic powder and continue to stir, melt and extrude, and dry in an oven at 80°C, press the dried product into tablets, crush it, and finally grind it into powder with a particle size of 10-50 μm, disperse Add 3-4 drops of fluorosilane dropwise to the butyl acetate solution, and ...

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Abstract

The present invention discloses a superhydrophobic powder coating, and a preparation method and an application thereof. The coating comprises hydrophobic powder and high temperature-cured resin powder, a mass ratio of the hydrophobic powder to the resin powder is 1:(1-4), the hydrophobic powder Is at least one of polytetrafluoroethylene with the particle size being 10-50 [mu]m, polyvinylidene fluoride, hydrophobically modified silica, hydrophobically modified titanium dioxide, hydrophobically modified carbon nanotubes and carbon black, and the resin powder is at least one of epoxy or polyesterpowders having a particle size being 10-50 [mu]m and being used for electrostatic spraying. The method has the advantages of simplicity, convenience, rapidness in preparation, and rapidity in completion of the production of a superhydrophobic coating layer on the surface of a substrate; and the produced coating layer has superhydrophobicity and ultrahigh wear resistance.

Description

technical field [0001] The invention belongs to the field of material chemistry and relates to a coating and coating technology, in particular to a superhydrophobic powder coating and its preparation method and application. Background technique [0002] There are many natural substances in nature, which exhibit certain hydrophobic properties due to their special structures, typically including lotus leaves and insect wings. People first observed this phenomenon from the surface of the lotus leaf, and by studying the structure, shape and material of the surface of the lotus leaf, the concept of super-hydrophobic was proposed, and a super-hydrophobic surface coating was developed. Through a large number of studies, it has been found that superhydrophobic surfaces in nature often have rough nanostructures and low surface energy substances, so constructing rough surfaces on low surface energy substances and modifying low surface energy substances on rough surface structures can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/18C09D175/04C09D167/00C09D5/16C09D5/03C09D5/08
CPCC09D127/18C08K3/36C08K9/06C09D5/033C09D5/08C09D5/1618C09D167/00C09D175/04
Inventor 张友法刘承志余新泉
Owner SOUTHEAST UNIV
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