Anti-electrowetting effect-based self-cleaning device and method for oil stain surface

A self-cleaning and electrowetting technology, applied in the direction of cleaning methods and appliances, chemical instruments and methods, etc., can solve problems such as difficult to clean oil stains, easy to damage the film layer, easy to change the properties of the film surface, etc. The effects of electrical effect failure, wide operating range, good stability and sustainability

Active Publication Date: 2020-02-21
CHINA ACADEMY OF SPACE TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The self-cleaning of oil droplets or oil film on the surface of the film layer is a difficult problem. Many film surfaces have good lipophilicity. After the pollution, the oil film is spread out and the contact angle formed is almost zero. Oil stains are completely rinsed off
Moreover, cleaning the film surface by external forces (such as physical washing and chemical reagent cleaning) will also bring many new problems. For example, the physical cleaning process is easy to damage the film layer, and the chemical reagent method is easy to change the properties of the film surface.
Therefore, traditional cleaning methods have great limitations on the surface of precious films or films with microstructures.

Method used

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  • Anti-electrowetting effect-based self-cleaning device and method for oil stain surface
  • Anti-electrowetting effect-based self-cleaning device and method for oil stain surface
  • Anti-electrowetting effect-based self-cleaning device and method for oil stain surface

Examples

Experimental program
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Effect test

Embodiment 1

[0039] like figure 1 , in this embodiment, the self-cleaning device for oily surfaces based on the reverse electrowetting effect includes: a self-cleaning environment device connected by wires and an adjustable power supply 9 . Among them, the self-cleaning environment device includes: a fluid chamber 1 , an oily film surface 2 , a dielectric material layer 3 , a base metal 4 and a low-conductivity fluid 6 .

[0040] Preferably, the low-conductivity fluid 6 is contained in the fluid cavity 1, as the working environment fluid in the self-cleaning process of the oil film surface 2; the dielectric material layer 3 is sprayed on the outer surface of the base metal 4, and the base metal 4 is completely wrapped; The film surface 2 is closely attached to the outer surface of the dielectric material layer 3 .

[0041] It can be seen that the present invention is based on the dielectric wetting effect, and the surface of the oily film that needs to be treated is placed in a low-conduc...

Embodiment 2

[0043] like figure 1 , the self-cleaning device for oily surfaces based on the reverse electrowetting effect further includes: a positive terminal 7 and a negative terminal 8. Among them, the positive terminal 7 is suspended in the low-conductivity fluid 6, and is connected to the output positive terminal of the regulating power supply 9 through a wire; output negative terminal connection.

[0044] Preferably, the negative terminal 8 and the wires placed in the low-conductivity fluid 6 are all insulated and coated, which prevents the occurrence of electrolysis and oxidation on the surface of the positive and negative electrodes and the metal substrate, so that the reverse electrowetting process has Very good stability and sustainability.

[0045] Preferably, a circuit breaker 11 is also provided on the wire used to connect the positive terminal 7 and the output positive end of the regulating power supply 9, which can control the on-off of the self-cleaning device on the enti...

Embodiment 3

[0056] On the basis of the above embodiments, the present invention also discloses a self-cleaning method for oily surfaces based on the reverse electrowetting effect, including: building a self-cleaning environment device; connecting the self-cleaning environment device to an adjustable power supply 9 through wires. Among them, the self-cleaning environment device is built through the following steps: the low-conductivity fluid 6 is contained in the fluid chamber 1 as the operating environment for the self-cleaning process of the oily film surface 2; a dielectric material layer 3 is sprayed on the outer surface of the base metal 4, The base metal 4 is completely wrapped; the surface of the oily film 2 and the outer surface of the dielectric material layer 3 are closely attached, and they are placed in the low-conductivity fluid 6 together.

[0057] In this embodiment, the self-cleaning scheme of the greasy surface based on the reverse electrowetting effect realizes the specifi...

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Abstract

The invention discloses an anti-electrowetting effect-based self-cleaning device and method for an oil stain surface. The device comprises a self-cleaning environment device and a regulating power supply which are connected by a lead, wherein the self-cleaning environment device includes a fluid cavity, an oil stain film surface, a dielectric material layer, base metal and low-conductivity fluid;the low-conductivity fluid is held in the fluid cavity, and serves as an operating environment in the self-cleaning process of the oil stain film surface; the dielectric material layer is sprayed to the outer surface of the base metal, and completely wraps the base metal; and the oil stain film surface is tightly attached to the outer surface of the dielectric material layer. According to the anti-electrowetting effect-based self-cleaning device and method for the oil stain surface, by taking a dielectric wetting effect as the basis, the oil stain film surface which needs to be treated is putin the low-conductivity fluid; a liquid-liquid contact angle is formed on the oil stain film surface; by applying impressed voltage, a contact angle at the side of an oil film is rapidly increased; and after a transient contact angle reaches 180 degrees, the oil film is separated from the oil stain film surface under the drive of dynamic energy, and thereby, self cleaning of the oil stain surfaceis realized.

Description

technical field [0001] The invention belongs to the technical field of fluid control and management, and in particular relates to a self-cleaning device and method for oil stained surfaces based on reverse electrowetting effect. Background technique [0002] The self-cleaning of oil droplets or oil film on the surface of the film layer is a difficult problem. Many film surfaces have good lipophilicity. After the pollution, the oil film is spread out and the contact angle formed is almost zero. Oil stains are completely rinsed off. Moreover, cleaning the film surface by external forces (such as physical washing and chemical reagent cleaning) will also bring many new problems. For example, the physical cleaning process is easy to damage the film layer, and the chemical reagent method is easy to change the properties of the film surface. Therefore, the traditional cleaning methods have great limitations for precious film surfaces or film surfaces with microstructures. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B7/00
CPCB08B7/00
Inventor 王庆功翁宁王超姚伟
Owner CHINA ACADEMY OF SPACE TECHNOLOGY
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