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Methods and devices for restoring and maintaining superhydrophobicity under liquids

A technology for superhydrophobic surfaces, gases, used in devices for coating surfaces with liquids, nanotechnology for materials and surface science, cleaning methods and utensils, etc.

Active Publication Date: 2016-03-23
RGT UNIV OF CALIFORNIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However these previous improvements are not effective unless the liquid pressure is relatively small (e.g. even 0.5 atm is too high)
Furthermore, these methods are only protective measures

Method used

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  • Methods and devices for restoring and maintaining superhydrophobicity under liquids
  • Methods and devices for restoring and maintaining superhydrophobicity under liquids
  • Methods and devices for restoring and maintaining superhydrophobicity under liquids

Examples

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Embodiment Construction

[0029] figure 2 Illustrated is a superhydrophobic (SHPo) surface 10 according to one embodiment. It should be understood that, as used herein, superhydrophobic or SHPo refers to the ability of a surface to be highly non-wetting to liquids. This can include liquids such as water, oil, or other solvents. SHPo surface 10 includes a substrate 12 having a plurality of microfeatures 14 disposed thereon. Typically, microfeatures 14 are oriented substantially perpendicular to substrate 12 . As used herein, microfeatures 14 mean microscopic features (microscopic outlines); they are typically on the order of microns, but can be smaller or larger. The microfeatures 14 can be arranged in an array or in a random configuration. Substrate 12 may be formed from any number of materials, but may include silicon if semiconductor processing techniques are used to form SHPo surface 10, as explained below. Microfeatures 14 have a height (H) as shown by arrows H, where they protrude relative to...

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PUM

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Abstract

The superhydrophobic surface includes a plurality of microfeatures disposed on the substrate, and a gas generator disposed within the microfeatures, the gas generator configured to generate gas within the microfeatures. When at least a portion of the microfeatures are in a wetted state, a gas is generated within the microfeatures to return the microfeatures to a dewetted state. Gas generation is self-regulating, starting automatically when wetting conditions exist, and stopping when enough gas has been generated to restore its dewetting state to restore superhydrophobicity.

Description

[0001] related application [0002] This application claims priority to US Provisional Patent Application No. 61 / 368,188, filed July 27, 2010. Claim priority under 35 U.S.C. §119. The aforementioned patent application is incorporated herein by reference as if fully set forth. [0003] Statement Regarding Federally Sponsored Research and Development [0004] This invention was made with government support under Grant No. 0103562 awarded by the National Science Foundation. The Government has certain rights in this invention. technical field [0005] The field of the invention relates generally to methods and devices utilizing superhydrophobic surfaces, and more particularly to methods and devices for maintaining superhydrophobicity on superhydrophobic surfaces submerged in liquids. Background technique [0006] By today's convention, a superhydrophobic (SHPo) surface is defined as a solid surface on which water in air forms a contact angle greater than 150 degrees. So far...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B81B1/00B81C1/00
CPCB08B17/06B08B17/065B82Y30/00Y10T428/24355C25B1/04C09D5/1681Y02E60/36B81B1/00B81C1/00B81C1/00428B05C7/00B05C9/00B05D5/00C25D9/00C25D17/00
Inventor 金昌津李忠烨
Owner RGT UNIV OF CALIFORNIA
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