Vapor phase polar solvent treatment method for glass surfaces

Patent metadata

Field	Value
Publication number	US-10347780-B2
Application number	US-201816151383-A
Country	US
Kind code	B2
Filing date	Oct 4, 2018
Priority date	Nov 17, 2015
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

A method of treating a polycarbonate glass surface, such as a bisphenol A polycarbonate, whereby the glass surface is immersed in a liquid phase polar aprotic solvent, such as dichloromethane, and exposed to a vapor phase polar aprotic solvent, such as acetone thus obtaining a textured glass surface with a hierarchical patterned nanoporous structure wherein the textured glass surface has a higher surface hydrophobicity and a marginally reduced optical light transmittance relative to the polycarbonate glass surface prior to the immersion, the exposure, or both.

First claim

The invention claimed is:

1. A vapor phase polar solvent treatment method of treating a glass surface comprising a polycarbonate, comprising:
immersing the glass surface in a liquid phase polar aprotic solvent for less than 3 seconds then immersing the glass surface in water to form a treated glass surface comprising nanopores;
exposing the treated glass surface to a vapor phase polar aprotic solvent for less than 4 minutes to form a textured glass surface with a hierarchical patterned nanoporous structure, wherein the textured glass surface has a higher surface hydrophobicity than the glass surface prior to the immersing, the exposing, or both, and wherein the textured glass surface has an optical light transmittance that is reduced by no more than 25 percentage points relative to the optical light transmittance of the polycarbonate glass surface prior to the immersing, the exposing, or both; and
dip coating the textured glass surface in a sol gel comprising 1,1,1,3,3,3-hexamethyl disilazane (HMDS) and tetraethyl orthosilicate (TEOS) to form a coated textured glass surface.

2. The method of claim 1 , wherein the coated textured glass surface has an average water droplet contact angle of greater than 130°.

3. The method of claim 1 , wherein the coated textured glass surface has an optical light transmittance of greater than 45%.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• KHALED Mazen Mohammad

Classifications

• B05D3/101

  Pretreatment of polymeric substrate · CPC title

• Y02E10/50

  Photovoltaic [PV] energy · CPC title

• B05D5/08

  to obtain an anti-friction or anti-adhesive surface (rendering particulate materials free-flowing in general, e.g. making them hydrophobic B01J2/30) · CPC title

• C08J2369/00

  Characterised by the use of polycarbonates; Derivatives of polycarbonates · CPC title

• C23C18/1212

  Zeolites, glasses · CPC title