Porous titanium dioxide coatings and methods of forming porous titanium dioxide coatings having improved photocatalytic activity
AssigneeGuardian Industries Corp.
InventorPramod K. Sharma
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Abstract
Methods for forming porous anatase titanium dioxide coatings are disclosed. Sol-gel compositions are prepared having at least one porosity agent, are applied to a substrate, and at least one porosity agent is removed. Porous anatase titanium dioxide coatings having at least one of improved antimicrobial properties, self-cleaning properties, hydrophilicity, and/or temperability are also disclosed. Substrates comprising such coatings are also disclosed.
Claims20
A method of forming a porous, pure anatase titanium dioxide coating on a substrate, comprising:
- preparing a titanium dioxide sot-gel composition comprising at least one porosity agent;
- coating the substrate with the sot-gel composition;
- and
- removing the porosity agent.
A method of improving at least one of antimicrobial properties, self-cleaning properties, hydrophilicity, and temperability of a pure anatase titanium dioxide coating, comprising:
- preparing a titanium dioxide sol-gel composition comprising at least one porosity agent;
- coating a substrate with the sol-gel composition;
- and
- heating the coated substrate to remove the porosity agent without forming rutile phase titanium dioxide.
A substrate comprising a porous anatase titanium dioxide coating, wherein the porous anatase titanium dioxide coating comprises a water contact angle less than about 12°.
A porous, pure anatase titanium dioxide coating having at least one of improved antimicrobial properties improved self cleaning properties, improved hydrophilicity, and improved temperability, wherein said porous, pure anatase titanium dioxide coating is made by:
- preparing a titanium dioxide sol-gel composition comprising at least one porosity agent;
- coating a substrate with the sol-gel composition;
- and
- removing the porosity agent.
Dependencies are inferred from the claim text.