Methods of making titania coatings having self cleaning properties, and associated articles are provided. In certain example instances, a substrate supports a layer comprising titanium dioxide. The substrate may support multiple layers. In certain examples, the titanium dioxide layer is made using a
Methods of making titania coatings having self cleaning properties, and associated articles are provided. In certain example instances, a substrate supports a layer comprising titanium dioxide. The substrate may support multiple layers. In certain examples, the titanium dioxide layer is made using a process involving a titania precursor and a photomonomer. The titanium dioxide coating may be applied as a liquid directly or indirectly on a substrate, then permitted to cure. After curing using ultraviolet radiation and/or electron beams, the resulting coating may inhibit fouling, be antireflective, be highly durable, self cleaning and/or hydrophilic in certain instances.
대표청구항▼
1. A method of making a coated article comprising an antireflection coating, the method comprising: mixing a photomonomer comprising at least one radiation curable monomer capable of polymerization through exposure to ultraviolet radiation or electron beam with a titanium alkoxide to form a mixture;
1. A method of making a coated article comprising an antireflection coating, the method comprising: mixing a photomonomer comprising at least one radiation curable monomer capable of polymerization through exposure to ultraviolet radiation or electron beam with a titanium alkoxide to form a mixture;applying the mixture directly or indirectly on a substrate to form a layer covering substantially all of a major surface of the substrate;first curing the layer by exposing substantially all of an outer surface of the layer to ultraviolet radiation or electron beam after its application for about 5 to 120 seconds; andsubsequently firing the cured layer, so as to form an antireflection coating comprising at least a titania-inclusive layer on the substrate. 2. The method of claim 1, wherein the titanium alkoxide comprises titanium tetra n-butoxide. 3. The method of claim 1, wherein the step of mixing the photomonomer with the titanium alkoxide further includes mixing a silane. 4. The method of claim 3, wherein the silane comprises 3-methacryloxypropyl trimethoxysilane. 5. The method of claim 1, wherein the step of mixing the photomonomer with the titanium alkoxide further includes mixing at least one solvent. 6. The method of claim 5, wherein the at least one solvent comprises n_propanol and methyl ethyl ketone. 7. The method of claim 1, wherein the mixture comprises titanium alkoxide in an amount up to 10% by weight, in a concentration expressed in terms of titanium dioxide, of the mixture. 8. The method of claim 1, further comprising the step of forming a high index layer, a low index layer, or a medium index layer between the layer and the substrate. 9. The method of claim 1, wherein the substrate comprises a glass substrate. 10. The method of claim 1, wherein the step of firing the layer is carried out at a temperature of from about 550 to 700° C. for a duration of from about 1 to 10 minutes. 11. A method of making a coated article comprising an antireflection coating, the method comprising: mixing a photomonomer comprising at least one radiation curable monomer capable of polymerization through exposure to ultraviolet radiation or electron beam with a titanium alkoxide and a silane to form a mixture; applying the mixture directly or indirectly on a substrate to form a layer, wherein the layer substantially entirely covers a major surface of the substrate; and curing the layer through exposure of substantially all of an outermost surface of the layer to ultraviolet radiation or electron beam after its application for about 5 to 120 seconds, so as to form an antireflective coating comprising a titania and silica-inclusive layer on the substrate, wherein a molar ratio of titania to silica is from about 80:40 to 60:20; and after said curing, firing the layer in an oven. 12. The method of claim 11, wherein the coating layer is fired in an oven at a temperature of from about 550 to 700° C. for a duration of from about 1 to 10 minutes.
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