Water and acetone treatment method for glass/polycarbonate surfaces

Patent metadata

Field	Value
Publication number	US-10388809-B2
Application number	US-201816151145-A
Country	US
Kind code	B2
Filing date	Oct 3, 2018
Priority date	Nov 17, 2015
Publication date	Aug 20, 2019
Grant date	Aug 20, 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 method of water and acetone treating of a glass surface comprising a polycarbonate, comprising:
immersing the glass surface in liquid phase dichloromethane for about 2 seconds or less to form a treated glass surface comprising nanopores; then
removing the glass surface from the liquid phase dichloromethane and immersing the glass surface in water, then
exposing the treated glass surface to vapor phase acetone 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.

2. The method of claim 1 , wherein the immersing is performed for a time period of 1.0-2.0 seconds and the exposing is performed for a time period of 0.8-1.5 minutes.

3. The method of claim 1 , wherein the treated glass surface comprises nanopores with an average diameter in the range of 100-800 nm and an average depth in the range of 2-15 nm.

4. The method of claim 1 , wherein an average distance between the nanopores of the treated glass surface is in the range of 1-10 μm.

5. The method of claim 1 , wherein the textured glass surface with a hierarchical patterned nanoporous structure comprises pores with an average diameter of 200-1000 nm and an average depth of 20-150 nm.

6. The method of claim 1 , wherein the textured glass surface with a hierarchical patterned nanoporous structure comprises spherules with an average width of 5-20 μm and an average height of 0.2-5 μm.

7. The method of claim 1 , wherein the textured glass surface has an average water droplet contact angle of greater than 75″.

8. The method of claim 1 , wherein the treated glass surface has an optical light transmittance of greater than 85% and the textured glass surface has an optical light transmittance of greater than 75%.

9. The method of claim 1 , wherein the textured glass surface has a roughness root mean square value in the range of 100-500 nm.

Assignees

• Univ King Fahd Pet & Minerals

Inventors

• KHALED Mazen Mohammad

Classifications

• C08J7/02

  with solvents, e.g. swelling agents · CPC title

• C23C18/1287

  with flow inducing means, e.g. ultrasonic · CPC title

• C23C18/1212

  Zeolites, glasses · CPC title

• B05D3/101

  Pretreatment of polymeric substrate · CPC title

• C23C18/1254

  Sol or sol-gel processing · CPC title