Ceramic membrane with capillary structure and super dehumidifying and wetting performance and preparation method thereof

A capillary structure, ceramic membrane technology, applied in electrolytic coatings, surface reaction electrolytic coatings, coatings, etc., can solve problems such as hydrophilic surfaces that have not yet been seen, and achieve the effects of good thermal conductivity and high thermal stability

Active Publication Date: 2016-06-01
苏州容电储能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the current papers and patents, a hydrophilic surface with a capillary structure has not been seen, which can produce super wetting and suction for water (or other liquids)

Method used

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  • Ceramic membrane with capillary structure and super dehumidifying and wetting performance and preparation method thereof
  • Ceramic membrane with capillary structure and super dehumidifying and wetting performance and preparation method thereof
  • Ceramic membrane with capillary structure and super dehumidifying and wetting performance and preparation method thereof

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Embodiment Construction

[0038]In the present invention, in addition to preparing ceramic films on aluminum (or aluminum alloy) planar substrates in the shape of foils, sheets, plates, etc., ceramic films can also be prepared on non-planar structures such as aluminum (or aluminum alloy) wires. Membranes are used in various occasions. There is no particular limitation on the shape of the base.

[0039] Due to the super wetting function of the ceramic membrane, the contact area between water droplets and air is as high as 300-1333cm when water droplets form on the ceramic membrane. 2 / g, that is, the heat exchange area between the water film and the ceramic film and air is large, so the water film can easily absorb heat from the environment and evaporate, changing from liquid to gas. At the same time, because the thickness of the water film is very thin (the thinnest can reach 7.5 μm / g), the temperature gradient in the thickness direction is small, which is conducive to the rapid heat absorption and ra...

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Abstract

The invention provides a ceramic membrane with a capillary structure and super dehumidifying and wetting performance. The thickness of the ceramic membrane ranges from 10 nm to 600 micrometers. The ceramic membrane comprises an aluminum compound substrate and a base membrane layer adhering to the substrate. The base membrane layer is an aluminum oxide ceramic layer. The ceramic membrane is a porous membrane with the average capillary radius of 0.1 mm to 1.2 mm, water drops with unit mass can be completely spread through the hydrophilic surface of the ceramic membrane, and a water membrane with the area not smaller than 300 cm<2>/g is formed. By means of the hydrophilic surface, water molecules can overcome self gravity, and the climbing height in the vertical direction is not smaller than 3.0 cm.

Description

technical field [0001] The invention relates to a preparation method and application of a ceramic membrane, in particular to a preparation and application of a ceramic membrane with a capillary structure and super-wetting suction performance. Background technique [0002] Surface wettability is an important characteristic of solid surfaces, and the contact angle is usually used to characterize the wettability of liquids on solids. Generally speaking, when the contact angle between a solid surface and water is greater than 90°, it is called a hydrophobic surface; when it is less than 90°, it is called a hydrophilic surface. In recent years, it has also been proposed to use 65° contact angle as the boundary between hydrophilic and hydrophobic. [0003] Due to its good wettability to liquids, hydrophilic surfaces can be widely used in industry and life. For example, when water vapor condenses on a hydrophilic surface, it is easy to expand into a uniform and continuous water f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/12B22F3/11B22F7/08C25D11/10
CPCB22F3/1103B22F3/1121B22F7/002C25D11/10C25D11/12
Inventor 谢贤宁林群张顺中刘颖丹
Owner 苏州容电储能科技有限公司
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