Superhydrophobic filter structure for selectively separating water and oil
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United States of America Patent
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Jan 9, 2018
Grant Date -
Oct 8, 2015
app pub date -
Jun 27, 2013
filing date -
Jun 28, 2012
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Abstract
A filter structure capable of efficiently separating water and oil using wettability is provided. The filter structure according to an exemplary embodiment of the present invention includes a first filter layer including a plurality of openings, a second filter layer including a plurality of openings and positioned so as to be overlapped with the first filter layer at a distance from each other, and a hydrophobic polymer layer formed on surfaces of the first filter layer and the second filter layer. The first filter layer and the second filter layer include surfaces each having a dual-scale protrusion and depression structure as a combination of a micro-scale structure and a nano-scale structure, and the hydrophobic polymer layer is formed along curves of the protrusion and depression structure.
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