Super-hydrophobic thin film with photothermal effect and preparation method thereof

A photothermal effect, super-hydrophobic technology, used in ion implantation plating, coating, metal material coating process, etc., to delay or prevent icing, broad application prospects, and excellent anti-icing/de-icing performance.

Active Publication Date: 2019-06-21
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the method of heating the equipment with an external heating source is limited by many factors such as ambient temperature, substrate size, and whether it is convenient to disassemble in actual operation.

Method used

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  • Super-hydrophobic thin film with photothermal effect and preparation method thereof
  • Super-hydrophobic thin film with photothermal effect and preparation method thereof
  • Super-hydrophobic thin film with photothermal effect and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Grind the steel sheet with sandpaper, then ultrasonically clean it with acetone, alcohol, and deionized water in sequence and dry it;

[0022] 2. Fix the cleaned substrate on the sample stage of the electron beam evaporation coating machine, and pump the chamber of the electron beam evaporation coating machine to 10 －5 High vacuum below Pa;

[0023] 3. Adjust the incident angle of the electron beam to 89°, and make the sample stage static, and deposit a 200nm titanium nitride oblique rod array on the substrate;

[0024] 4. Convert the evaporation material to polytetrafluoroethylene, adjust the incident angle of the electron beam to 82°, and rotate the sample stage at a speed of 2 rpm, and deposit 100 nm of polytetrafluoroethylene on the top of the titanium nitride inclined rod array.

[0025] Figure 1a It is a scanning electron micrograph of the titanium nitride-polytetrafluoroethylene composite film prepared in Example 1; Figure 1b It is the reflectance curve of...

Embodiment 2

[0027] 1. Polish the aluminum sheet with sandpaper, then ultrasonically clean it with acetone, alcohol, and deionized water in sequence and dry it;

[0028] 2. Fix the cleaned substrate on the sample stage of the electron beam evaporation coating machine, and pump the chamber of the electron beam evaporation coating machine to 10 －5 High vacuum below Pa;

[0029] 3. Adjust the incident angle of the electron beam to be 85°, and make the sample stage rotate at a speed of 4rpm, and deposit a 1000nm silver straight rod array on the substrate;

[0030] 4. Convert the evaporation material to polystyrene, adjust the incident angle of the electron beam to 85°, and rotate the sample stage at a speed of 5 rpm, and deposit 500nm polystyrene on the top of the silver straight rod array.

[0031] Fig. 2 is the contact angle of water on the silver-polystyrene composite film prepared in embodiment 2 and the photo of sliding angle. Due to the low surface energy of polystyrene and the large p...

Embodiment 3

[0033] 1. Polish the magnesium alloy sheet with sandpaper, then ultrasonically clean it with acetone, alcohol, and deionized water in sequence, and dry it;

[0034] 2. Fix the cleaned substrate on the sample stage of the electron beam evaporation coating machine, and pump the chamber of the electron beam evaporation coating machine to 10 －5 High vacuum below Pa;

[0035] 3. Adjust the incident angle of the electron beam to 82°, and rotate the sample stage at a speed of 10rpm, and deposit a 2000nm straight copper rod array on the substrate;

[0036] 4. Convert the evaporation material to polyethylene terephthalate PET, adjust the incident angle of the electron beam to 88°, and make the sample stage static, and deposit 1000nm PET on the top of the straight copper rod array.

[0037] image 3 For using the copper-polyethylene terephthalate PET composite film prepared in Example 3 under laser irradiation, the photo of the surface ice layer melting gradually. Because the nanostr...

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Abstract

The invention discloses a super-hydrophobic thin film with a photothermal effect and a preparation method thereof. The preparation method comprises the steps of adopting an inclined growth method, firstly depositing a layer of nano-structure with the photothermal effect on the surface of a substrate, and then depositing a layer of low-surface-energy substances on the surface of the substrate. Photothermal materials comprise titanium nitride, silver, copper or ferroferric oxide; and the low-surface-energy substances comprise polytetrafluoroethylene, polyethylene, polypropylene, polystyrene or polyethylene glycol terephthalate. The composite nano-structure prepared through the method can be used as anti-icing / de-icing thin film, and the low-surface-energy substances are utilized for improving the hydrophobicity of the substrate, so that icing can be delayed or prevented; and through the photothermal effect, the substrate produces intensive temperature rise under an illumination condition, so that ice coated on the surface can be melted. The thin film provided by the invention is simple in preparation process, has super-hydrophobicity and an illumination heat-producing capability, favorable in anti-icing / de-icing performance, and broad in application prospect.

Description

technical field [0001] The invention relates to a superhydrophobic film with photothermal effect and a preparation method thereof, belonging to the technical field of functional materials. Background technique [0002] The icing on the surface of materials has caused serious safety hazards and property losses to communication facilities, railway transportation, aviation and navigation and other fields. The superhydrophobic micro-nano material has a unique air cushion structure, which makes the liquid droplets form a solid-liquid-gas three-phase coexistence interface on its surface, which is beneficial to delay or prevent freezing. However, in a complex natural environment, water droplets or mist will inevitably freeze on the surface of the material, so a certain method needs to be used to quickly remove the surface ice. The common deicing methods include natural deicing method, mechanical deicing method and heating deicing method, among which the heating method has the adva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/30C23C14/06C23C14/08C23C14/12C23C14/14
Inventor 马菱薇李晓刚张达威
Owner UNIV OF SCI & TECH BEIJING
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