Method for photocatalytically rendering a surface of a substrate superhydrophilic, a substrate with superhydrophilic photocatalytic surface, and method of making thereof
US7294365B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2004 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Nov 9, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2218/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of preventing or reducing fogging of a surface of a composite when subjected to humid conditions includes providing a composite with a surface. The composite includes a substrate and a photocatalytic surface layer. The photocatalytic surface layer includes a photocatalyst. The method further includes subjecting the photocatalyst to photoexcitation to render the surface of the composite hydrophilic, wherein, after the photoexcitation, the surface of the composite has a water wettability of less than 10° in terms of the contact angle with water. The method further includes subjecting the composite to humidity that is sufficient to induce fogging of the substrate if the photocatalytic surface layer were absent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.