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Preparation method of flexible super-hydrophobic surface based on carbon nanotubes

A super-hydrophobic surface, carbon nanotube technology, applied in the field of super-hydrophobicity, can solve the problem of high cost, achieve the effects of low cost, stable super-hydrophobic performance and simple preparation process

Active Publication Date: 2021-07-02
CHANGZHOU UNIV +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the shortcomings of the high cost of the existing preparation methods, the present invention provides a method for preparing a flexible superhydrophobic surface based on carbon nanotubes

Method used

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Embodiment Construction

[0020] A method for preparing a flexible superhydrophobic surface based on carbon nanotubes, the steps of the method are:

[0021] (a) Prepare multi-walled carbon nanotube powder with a diameter of 10-30nm by chemical vapor deposition;

[0022] (b) Then ultrasonically purify the multi-walled carbon nanotube powder in a solution, the solution is composed of concentrated nitric acid and concentrated sulfuric acid, and the volume ratio of concentrated nitric acid and concentrated sulfuric acid is 1:1;

[0023] (c) ultrasonically dispersing the multi-walled carbon nanotube powder in isopropanol for 2 hours to form a stable suspension;

[0024] (d) adding magnesium nitrate electrolyte salt to the suspension and centrifuging for 1 hour, the mass ratio of suspension to magnesium nitrate electrolyte salt is 30:1;

[0025] (e) The suspended mixture after centrifugation is transferred to an electrophoresis tank equipped with an anode, cathode and ultrasonic mixer. A stainless steel pl...

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Abstract

The invention relates to the field of super-hydrophobicity, in particular to a preparation method of a flexible super-hydrophobic surface based on carbon nanotubes. The method comprises the following steps: (a) preparing multi-walled carbon nanotube powder by using a chemical vapor deposition method; (b) performing ultrasonic purification on the multi-walled carbon nanotube powder in a solution; (c) ultrasonically dispersing the multi-walled carbon nanotube powder in an isopropanol solution to form a stable suspension; and (d) adding magnesium nitrate electrolyte salt into the suspension and centrifuging. According to the preparation method, preparation of the large-area super-hydrophobic surface can be realized; a titanium layer on the surface of a carbon nanotube film is stable in super-hydrophobic performance and not prone to being damaged by external force, high-surface-energy Ti on the surface is directly changed into low-surface-energy TiO2 through calcination after electrophoretic deposition, and the surface does not need to be modified by fluorine-containing chemical substances any more; and the preparation process is simple, the cost is low, and large-area continuous preparation can be realized.

Description

technical field [0001] The invention relates to the field of superhydrophobic, in particular to a method for preparing a flexible superhydrophobic surface based on carbon nanotubes. Background technique [0002] Aqueous films and coatings, and more specifically, superhydrophobic films and coatings, have gained considerable attention in recent years due to several attractive qualities. Highly hydrophobic surfaces have been recognized in nature, probably most commonly on lotus leaves and cicada wings. Due to their hydrophobic properties, the lotus leaf is able to self-clean by washing away dust particles and debris as small water droplets roll off its surface. This self-cleaning capability is desirable in many modern applications. However, the cost of the existing superhydrophobic membrane preparation method is relatively high. Contents of the invention [0003] In order to overcome the disadvantage of high cost of the existing preparation methods, the present invention p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D1/04C23C14/16C23C14/35B82Y40/00B82Y30/00C01B32/16C01B32/17C01B32/174
CPCC25D1/04C25D1/006C23C14/165C23C14/35B82Y40/00B82Y30/00C01B32/16C01B32/17C01B32/174
Inventor 弓晓晶许敬郭国标
Owner CHANGZHOU UNIV
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