Chitosan-coated hydrophobic glass and method of making

摘要

Glass surfaces, for example, windshield surfaces, have a durable hydrophobic coating applied thereto. The glass surface is first treated by any suitable method to enhance the ability of a chitosan polymer coating to durably or substantially permanently adhere thereto. Once the chitosan coating has been applied to the glass surface, the normally hydrophilic chitosan coating is rendered hydrophobic by suitable treatment, for example, by a combination of enzymatic and chemical treatments. Alternatively, the chitosan may be rendered hydrophobic prior to coating it on the glass surface, but that is a less preferred technique. The method of the invention provides a glass article having a hydrophobic surface.

主权项

1. A method of providing a durable hydrophobic chitosan coating on a glass surface, the method comprising:
(a) treating the glass surface by applying to the surface a silane coupling agent comprising aminopropyltriethoxy silane (“APES”) and glutaraldehyde to enhance the bondability of chitosan to the treated glass surface by making the glass surface chemically reactive with chitosan amine groups; (b) after step (a), applying chitosan to the glass surface to chemically bond thereto a durable coating of chitosan; and (c) reacting the chitosan with one or more suitable reagents to attach an enzyme-modified phenol to the chitosan to render the chitosan hydrophobic; to thereby provide the durable hydrophobic chitosan coating on the glass surface.