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Superhydrophobic conductive coating and processing method thereof

A technology of conductive coating and processing method, which is applied in the direction of conductive coating, coating, and device for coating liquid on the surface, etc., which can solve the problems of high production cost and poor lateral conductivity

Active Publication Date: 2012-01-11
尚蒙科技无锡有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, although vertically grown carbon nanotubes have very good superhydrophobic properties, they have the following disadvantages: (1) due to the vertical growth, the lateral conductivity is very poor; (2) the production cost is high, and it is generally difficult to directly Large-area growth of vertically parallel aligned carbon nanotubes

Method used

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  • Superhydrophobic conductive coating and processing method thereof
  • Superhydrophobic conductive coating and processing method thereof
  • Superhydrophobic conductive coating and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Disperse carbon nanotubes with a concentration of 0.3% in alcohol and spray them directly on the surface of the workpiece, and then spray them with polyisoprene with a concentration of 0.3% on the carbon nanotubes that have been sprayed to cure them. Made of super-hydrophobic nano-coating. figure 1 The electron microscope photo of the coating section shows that its static water contact angle is 160 degrees, its sliding angle is about 3 degrees, and its surface sheet resistance is 110 ohms. exist figure 1 In the middle, the left image is a low-resolution image of the cross-section of the coating, and the right image is a high-magnification image of the surface topography. UV ozone treatment was performed on the surface of the coating, and it was found that after a short period of time (such as 7 minutes) treatment, the water contact angle on the coating surface decreased from 160 degrees to 100 degrees, but returned to 152 degrees after 3 days, still having super-hydrop...

Embodiment 2

[0024] Disperse carbon nanotubes with a concentration of 0.3% in alcohol and spray directly on the surface of the workpiece, then spray butyl rubber with a concentration of 0.3% on the carbon nanotubes that have been sprayed, and cure them to form Superhydrophobic nanocoating. figure 2 A top view of the coating on glass. exist figure 2 In the middle, the left picture is the coating surface, and the right picture is the top view of the coating surface after dripping water droplets (the size of the water drop is about 35 microliters). The static contact angle of water on the coating surface is 158 degrees, the sliding angle is 3 degrees, the thin layer is translucent, and the surface square resistance is 150 ohms. The nanostructure in the carbon nanotubes used in the coating, combined with the microstructure formed by the agglomerated nanotubes, forms a three-dimensional "lotus leaf" structure that leads to the superhydrophobic properties of the coating, while the conductivi...

Embodiment 3

[0026] image 3 The effect of carbon nanotube concentration (relative to polymer material) on water contact characteristics and rolling angle is shown. When the nano-coating does not contain carbon nanotubes, the water contact angle of the coating is 90 degrees, and the rolling angle is 50 degrees. At this time, the surface of the nano-coating is in the state of wetting or not. With the increase of the carbon nanotube concentration, the water contact angle of the nano-coating surface is constantly increasing, while the rolling angle is constantly decreasing. When the carbon nanotube concentration is 86%, the water contact angle of the nano-coating is 160 degrees, and the rolling angle is close to 0. At this time, the nano-coating has super-hydrophobic properties.

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Abstract

The invention provides a superhydrophobic conductive coating and a processing method thereof. Through adopting special designs of a nano-tube material and a polymer (such as rubber, rubber resins and the like), the processing method can produce a nanoscale coating which has adjustable water contact characteristics and can be utilized in a conductive occasion under protection provided by an electromagnetic screen or a building antistatic electromagnetic shielding. The processing method comprises the following steps of dispersing directly nano-tube in an organic solvent, spraying the mixture onthe surface of a workpiece to form a nano-tube coating, and spraying a high-molecular material on the surface of the coating for fixing of the nano-tube coating to obtain the superhydrophobic conductive coating. Water contact characteristics of the superhydrophobic conductive coating can be adjusted through a ratio of the nano-tube to the high-molecular material. The water contact characteristicsof the superhydrophobic conductive coating can be changed through ultraviolet / ozone treatment. In addition, a surface with self-recovery superhydrophobic characteristics is obtained through control of ultraviolet / ozone treatment time and thus the superhydrophobic conductive coating has an effect of stimulating and shielding the water contact characteristics.

Description

technical field [0001] The invention belongs to the field of coatings, and more specifically relates to an adjustable super-hydrophobic to super-hydrophilic conductive coating and a method for processing the coating. Background technique [0002] At present, superhydrophobic treatment is mostly obtained by special treatment with fluoride or nanostructured polymers. These superhydrophobic coatings are generally not conductive and cannot be used in conductive applications. Although it has recently been reported that TiO 2 Nanowire treatment (electrochemical treatment) or carbon nanotubes (or TiO2) plus surface fluorination treatment to obtain a superhydrophobic surface, but the application of this method is also limited, the main limitation is (1) the surface can be applied to conductive metals surface; (2) electrochemical treatment can form nanowire or nanotube structure; (3) surface fluorination treatment. Moreover, the general perfluorinated molecule treatment directly a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D5/24B05D5/12B05D7/14B05D3/06
Inventor 杨得全
Owner 尚蒙科技无锡有限公司