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Method of improving hydrophobic stability of nanometer array film

A nano-array and super-hydrophobic technology, applied in gaseous chemical plating, metal material coating process, coating, etc., can solve the problems of poor stability of super-hydrophobic effect, achieve long-term stability and improve durability

Inactive Publication Date: 2012-01-11
EAST CHINA JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a method for improving the superhydrophobic stability of nano-array films in view of the problem of poor stability of the super-hydrophobic effect of nano-array film materials in the prior art

Method used

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  • Method of improving hydrophobic stability of nanometer array film
  • Method of improving hydrophobic stability of nanometer array film
  • Method of improving hydrophobic stability of nanometer array film

Examples

Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1: Improving the superhydrophobic surface stability of zinc oxide nanorod film

[0019] 1. A zinc oxide nanorod film with an array structure was prepared by vapor transport. In order to grasp the wettability of the surface, the contact angle of water on the surface was measured by a contact angle tester. The contact angle between the surface and water 156±2.2??, the rolling angle test results show that the rolling angle of water droplets on the surface is 8??; after 30 minutes, the contact angle and rolling angle of the surface are measured to be 121±1.4?? and 24?? ; It was observed that the water droplets completely penetrated into the gaps of the superhydrophobic array nano-films in about 20 min. The results show that the as-prepared arrays of ZnO nanorods have poor superhydrophobic stability.

[0020] 2. Clean the pollutants and adsorbates on the surface of the zinc oxide nanorod film array. The cleaning step is mainly to clean the zinc oxide nanorod fil...

Embodiment 2

[0024] Embodiment 2: Improving the superhydrophobic surface stability of carbon nanotube film

[0025] 1. A carbon nanotube film with an array structure was prepared by chemical vapor deposition technology. In order to grasp the wettability of the surface, the contact angle of water on the surface was first measured with a contact angle tester. The contact angle between the surface and water The rolling angle is 153±3.6??, and the rolling angle test results show that the rolling angle of water droplets on the surface is 7??; after 30 minutes, the contact angle and rolling angle of the surface are measured to be 117±2.3?? and 17? ?; Observe that the water droplets completely penetrate into the gaps of the super-hydrophobic array nano-film in about 25 minutes. It shows that the superhydrophobic stability of the prepared arrayed carbon nanotubes is very poor.

[0026] 2. Clean the pollutants and adsorbates on the surface of the arrayed carbon nanotube film. The cleaning step is...

Embodiment 3

[0030] Example 3: Improving the stability of the superhydrophobic surface of the porous nano-array aluminum oxide film

[0031]1. A porous nano-alumina film with an array structure was prepared by anodic oxidation technology. In order to grasp the wettability of the surface, the contact angle of water on the surface was measured with a contact angle tester. The contact angle between the surface and water 154±1.8??, the rolling angle test results show that the rolling angle of water droplets on the surface is 10??; after 30 minutes, the contact angle and rolling angle of the surface are measured to be 127±4.1?? and 19?? ; It was observed that the water droplets completely penetrated into the gaps of the superhydrophobic array nano-films in about 50 min. It shows that the superhydrophobic stability of the prepared porous nano-array alumina film is poor.

[0032] 2. Clean the pollutants and adsorbates on the surface of the array porous nano-alumina film. The cleaning step is ma...

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Abstract

The invention discloses a method of improving hydrophobic stability of a nanometer array film. The method comprises the following steps: placing the nanometer array film which has been rinsed in a reaction chamber that is subjected to vacuum-pumping; allowing mixed gas of hexafluoropropylene oxide (HFPO) and sulfonyl-fluorobutane to enter into the vacuum chamber by using an electric field to provide high energy plasma and using hot filament to control reaction temperature, wherein, the ratio of the flow of HFPO to the flow of sulfonyl-fluorobutane is 24:3 to 24:12 sccm; deposing a polytetrafluoroethylene nanometer membrane on the nanometer array film through polymerization. A nanometer array film hydrophobic material treated with the method provided in the invention enables water droplets not to penetrate into gaps in the nanometer array film; according to observation of long-term utilization of the nanometer array film hydrophobic material, a contact angle and a roll angle of the hydrophobic surface of the material do not decrease or increase obviously with utilization time, and therefore, long-term stabilization of hydrophobicity is maintained, and endurance of hydrophobic self-cleaning surfaces is improved.

Description

technical field [0001] The invention relates to a method for improving the superhydrophobic stability of a nano-array film, belonging to the technical field of nano-material surface modification. Background technique [0002] Due to the importance in basic research and applications, the superhydrophobicity of nanomaterials, especially ordered nanomaterials such as nanowires, nanotubes and nanorods, has attracted widespread attention. A superhydrophobic surface generally refers to a solid surface with a contact angle greater than 150° and a rolling angle less than 5°. In recent years, the reason why superhydrophobic materials have attracted widespread attention is that it has extremely broad application prospects in industrial and agricultural production, national defense construction and people's daily life. If it is applied to an antenna, it can prevent signal weakening caused by snow accumulation and ensure smooth communication around the clock; if it is applied to a semi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C16/56
Inventor 李刚
Owner EAST CHINA JIAOTONG UNIVERSITY
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