Hypertransparent Nanostructured Superhydrophobic and Surface Modification Coatings

a superhydrophobic and surface modification technology, applied in the field of hypertransparent nanostructured superhydrophobic and surface modification coatings, can solve the problems of low transmittance of hydrophobic coatings and inapplicability to windows and solar panels

Inactive Publication Date: 2010-08-12
NGIMAT CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, existing hydrophobic coatings either have low transmittance, which is not suitable for windows and solar panels, or are not as hydrophobic as lotus leaves.

Method used

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  • Hypertransparent Nanostructured Superhydrophobic and Surface Modification Coatings
  • Hypertransparent Nanostructured Superhydrophobic and Surface Modification Coatings
  • Hypertransparent Nanostructured Superhydrophobic and Surface Modification Coatings

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Embodiment Construction

[0020]Superhydrophobic Coatings by the CCVD Process

[0021]Superhydrophobic and other surface modifying coatings have been grown by many techniques, such as CVD (Wu et al., Chem. Vap. Deposition 8, 47, 2002) and sol-gel (Shang et al., Thin Solid Film 472, 37, 2005). These techniques can require costly starting materials, be time consuming, and / or have low throughput.

[0022]The inexpensive CCVD technology offers an attractive way to grow nanostructured superhydrophobic coatings on glass and plastic substrates with good yield and high throughput potential. While CCVD is the preferred method, other techniques, such as various vapor deposition methods, may be used to achieve the structures of the present invention. SiO2 was chosen as an example primary coating material because of its low cost, ease of preparation, and the refractive index match between the coating and many candidate substrates, which reduces reflectivity of the coated specimens.

[0023]In the CCVD process (Hunt et al., App. ...

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Abstract

Hydrophobic and self-cleaning surfaces have wide applications, including glasses, camera covers, windows, solar panels and high-end finished surfaces. Many existing hydrophobic coatings either have low transmittance, making them unsuitable for high light transmission applications, or are insufficiently hydrophobic. The present invention concerns high-quality hypertransparent superhydrophobic coatings, for example SiO2-based, with double-roughness microstructure that were deposited on to, for example, glass substrates using, for example, the combustion chemical vapor deposition (CCVD) technique. Embodiments of the invention include coatings with a contact angle of higher than 165°, a rolling angle of <5°, a haze of <0.5%, and an increased transmittance by 2% higher and a reflectance of 2% lower than bare glass. The double roughness can improve wear resistance. Additionally, other surface chemistries can be applied to yield hydrophilic, oliophobic, or oliophobic surfaces.

Description

CROSS REFERENCE TO RELATED CASES[0001]This application claims the benefit of priority of U.S. Provisional Application Ser. No. 61 / 151,358, filed on Feb. 10, 2009. The entirety of that provisional application is hereby incorporated.STATEMENT OF FEDERAL SUPPORT[0002]This work was supported by the Department of Energy (DOE), through Grant No. DE-FG02-04ER84007. The United States Government has certain rights in the invention.BACKGROUND TO THE INVENTION[0003]Studies of superhydrophobic self-cleaning surfaces have attracted increasing interest in recent years as a result of numerous new prospects for both fundamental research and practical applications. The applications of self-cleaning surfaces include architectural glass for homes and commercial buildings, automotive glass, shower doors, solar panel glass covers, nanochips, and microfluidic systems (Nakajima et al., Chem. Monthly 132, 31, 2001; Patankar, Langmuir 20, 8209, 2004; Quere et al., Nanotechnology 14, 1109, 2003).[0004]With w...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B32B3/00C23C16/00
CPCY10T428/24355C23C16/401B05B7/06B05C11/1005
Inventor JIANG, YONGDONGHUNT, ANDREW TYESMALLEY, JEANNE Y.HARRIS, HOLLY E.
Owner NGIMAT CO
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