Durable ice-resistant super-hydrophobic coating and preparation method thereof

A super-hydrophobic coating, durable technology, applied in the coating, the device for coating liquid on the surface, the surface pretreatment, etc., can solve the problem of losing super-hydrophobicity, and achieve excellent anti-icing performance and good wear resistance. Effect

Active Publication Date: 2017-02-22
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it has a certain mechanical stability, it loses its superhydrophobicity when rubbed on a relatively smooth rag, and the maximum friction is 25 cm, so the stability still needs to be improved.

Method used

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  • Durable ice-resistant super-hydrophobic coating and preparation method thereof
  • Durable ice-resistant super-hydrophobic coating and preparation method thereof
  • Durable ice-resistant super-hydrophobic coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) After the steel is polished, the groove structure is obtained by laser treatment. The depth of the concave structure is 250 μm, and the width is 100 μm; the width of the convex structure is 120 μm;

[0024] (2) After cleaning the sample obtained in step (1), spray a decahydronaphthalene solution with a concentration of 4 g / L ultra-high molecular polyethylene on the surface of the groove structure and dry it to obtain an intermediate polymer layer.

[0025] (3) Al with a particle size of 70 nm 2 o 3 Particles were immersed in 0.06 mol / L ethanol solution of heptadecafluorodecyltriethoxysilane at a temperature of 55 °C for 3.5 h.

[0026] (4) The hydrophobic nano-Al obtained in step (3) 2 o 3 Particles and ultra-high molecular polyethylene are added to decahydronaphthalene to keep Al 2 o 3 The concentration is 35 g / L, and the concentration of ultra-high molecular weight polyethylene is 8 g / L. The above mixture is heated to 150 °C, sprayed on the coating described...

Embodiment 2

[0029] (1) After the steel is polished, the groove structure is obtained by laser treatment. The depth of the concave structure is 200 μm, and the width is 150 μm; the width of the convex structure is 100 μm;

[0030] (2) After cleaning the sample obtained in step (1), spray a decahydronaphthalene solution with a concentration of 5 g / L ultra-high molecular polyethylene on the surface of the groove structure and dry it to obtain an intermediate polymer layer.

[0031] (3) Al with a particle size of 50 nm 2 o 3 Particles were soaked in 0.07 mol / L ethanol solution of heptadecafluorodecyltriethoxysilane, the soaking temperature was 50 °C, and the soaking time was 4 h.

[0032] (4) The hydrophobic nano-Al obtained in step (3) 2 o 3 Particles and ultra-high molecular polyethylene are added to decahydronaphthalene to keep Al 2 o 3 The concentration is 40 g / L, and the concentration of ultra-high molecular weight polyethylene is 6 g / L. The above mixture is heated to 150 °C, spray...

Embodiment 3

[0035] (1) After the steel is polished, the groove structure is obtained by laser treatment. The depth of the concave structure is 300 μm, and the width is 50 μm; the width of the convex structure is 200 μm;

[0036] (2) After cleaning the sample obtained in step (1), spray a decahydronaphthalene solution with a concentration of 3 g / L ultra-high molecular polyethylene on the surface of the groove structure and dry it to obtain an intermediate polymer layer.

[0037] (3) Al with a particle size of 90 nm 2 o 3 Particles were soaked in 0.08 mol / L ethanol solution of heptadecafluorodecyltriethoxysilane, the soaking temperature was 60 °C, and the soaking time was 3 h.

[0038] (4) The hydrophobic nano-Al obtained in step (3) 2 o 3 Particles and ultra-high molecular polyethylene are added to decahydronaphthalene to keep Al 2 o 3The concentration is 30 g / L, and the ultra-high molecular weight polyethylene concentration is 8 g / L. The above mixture is heated to 150 °C, sprayed on...

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Abstract

The invention discloses a durable ice-resistant super-hydrophobic coating and a preparation method thereof. The durable ice-resistant super-hydrophobic coating consists of a metal trench structure at the bottom, a macromolecule layer in the middle and a nanoparticle-macromolecule composite layer on the upper part, smooth steel is used as a substrate, after a trench structure is etched by laser, a pure macromolecule coating coats the trench structure, and then a macromolecule-nano composite coating is sprayed on the pure macromolecule coating to obtain the durable ice-resistant super-hydrophobic coating. The preparation method comprises the following steps: firstly, etching the regular trench structure in the surface of the smooth steel by laser; secondly, after carrying out O2 plasma treatment on the steel, spraying ultra high molecular weight polyethylene in a molten state at high temperature, and drying to form a film; and finally, spraying an ultra high molecular weight polyethylene and hydrophobic nano Al2O3 mixture, and drying to obtain the required coating. The super-hydrophobic coating has good mechanical stability and environmental persistence, and has excellent ice resistance.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a durable ice-resistant superhydrophobic coating and a preparation method thereof. Background technique [0002] The surface of lotus leaves in nature is extremely non-wetting to water, which is called superhydrophobic phenomenon. It has been found through research that the surface of the lotus leaf has a micron and nanometer level structure, and the surface is covered with a layer of wax with low surface energy, so it has super-hydrophobic properties. Therefore, biomimetic superhydrophobic interfaces can be obtained by preparing such hierarchical structures in various ways and subsequent low surface energy modification. [0003] Due to its excellent water resistance and water repellency, superhydrophobic interfaces have great application prospects in the fields of underwater drag reduction, self-cleaning surfaces, metal protection, and anti-icing and anti-icing fields. The main problem ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D5/08B05D7/00B05D7/14B05D3/00
CPCB05D3/002B05D5/00B05D5/08B05D7/14B05D7/544B05D2202/10B05D2301/00B05D2350/30B05D2507/01B05D2420/01B05D2420/02
Inventor 熊党生王楠
Owner NANJING UNIV OF SCI & TECH
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