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US 9,040,145 B2Granted
Polymer having superhydrophobic surface
AssigneeResearch Foundation of the City University of New York
InventorsAlan Michael Lyons, QianFeng Xu
Life of this patent
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Abstract
The disclosure relates to a superhydrophobic surface. Methods of fabrication are disclosed including laminating a polymer sheet having a surface to a template having a textured surface or a layer of a nanomaterial (e.g., nanoparticles or nanofibers) to convert the surface of the polymer sheet to a hydrophobic surface having a water contact angle of at least about 150°.
Claims20
An article comprising:
- a hydrophobic polymer surface with a water contact angle of at least about 150°;
- and a plurality of metal oxide nanoparticles disposed on the hydrophobic surface, at least some of the metal oxide nanoparticles being partially embedded in the hydrophobic polymer surface and partially exposed on the hydrophobic polymer surface, wherein the hydrophobic polymer surface is comprised of multi-level hierarchical structures formed from agglomerates of the metal oxide nanoparticles, at least some of the metal oxide nanoparticles partially being embedded into polymer filaments that emanate from the hydrophobic polymer surface, where the multi-level hierarchical structures range in size from 20 nanometers to 100 microns.
An article comprising:
- a hydrophobic polymer surface with a water contact angle of at least about 150°;
- and a plurality of nanoparticles disposed on the hydrophobic polymer surface, at least
- some of the nanoparticles being partially embedded in the hydrophobic polymer surface and partially exposed on the hydrophobic polymer surface, wherein the hydrophobic polymer surface is comprised of multi-level hierarchical structures formed from agglomerates of the nanoparticles, at least some of the nanoparticles partially being embedded into polymer filaments that emanate from the hydrophobic polymer surface, where the multi-level hierarchical structures range in height from 20 nanometers to 100 microns, the multi-level hierarchical structures comprising first structures with heights between 20 nm to 100 nm, second structures with heights between 100 nm and 300 nm, and third structures with heights between 300 nm to 3 microns.
An article comprising:
- a hydrophobic polymer surface with a plurality of protrusions, each protrusion comprising a top surface and a side wall;
- a plurality of metal oxide nanoparticles disposed on the hydrophobic polymer surface, at least some of the metal oxide nanoparticles being partially embedded in the hydrophobic polymer surface and partially exposed on the hydrophobic polymer surface, wherein the hydrophobic polymer surface is comprised of multi-level hierarchical structures formed from agglomerates of the metal oxide nanoparticles, at least some of the metal oxide nanoparticles partially being embedded into polymer filaments that emanate from the hydrophobic polymer surface, where the multi-level hierarchical structures range in size from 20 nanometers to 100 microns;
- and wherein the plurality of protrusions comprises two neighboring protrusions separated by a groove, the two neighboring protrusions being separated by a distance of at least about 5 micrometers and less than about 500 micrometers.
Dependencies are inferred from the claim text.