Photocatalytically hydrophilifying and hydrophobifying material

Details Photocatalytically hydrophilifying and hydrophobifying material Photocatalytically hydrophilifying and hydrophobifying material

1997-12-09

1999-08-17

Lusignan, Michael

Stock material or miscellaneous articles

Composite

10628716, 4271263, 427164, 427165, 427299, 428446, 428688, 428689, B32B 904

Patent

active

059391944

ABSTRACT:
A method for highly hydrophilifying the surface of an article by photoexcitation of a semiconductor photocatalyst and maintaining the hydrophilicity is disclosed. A layer containing a photocatalyst is formed on a substrate. Onto the surface of the layer are fixed a hydroxyl group upon photoexcitation of the photocatalyst and a physically adsorbed water molecule in the vicinity of the hydroxyl group upon photoexcitation of the photocatalyst. Thus, the surface is highly hydrophilified. Further, this surface, simultaneously with the hydrophilification, exhibits higher hydrophobicity.

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patent: 5547823 (1996-08-01), Murasawa et al.
patent: 5616532 (1997-04-01), Heller et al.
patent: 5755867 (1998-05-01), Chikuni et al.

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