Superomniphobic Thin Film
AssigneeWaymo LLC
InventorJohn T. Simpson
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Abstract
An article including an optically transparent, superomniphobic coating that is durable and relatively easy to keep clean, is disclosed. In one aspect, the present disclosure provides an article comprising a substrate and a graded layer, the graded layer having a first side disposed adjacent the substrate, the first side comprising 45-85 wt. % silicon oxide in a first glass phase and 10-40 wt. % boron oxide in a second glass phase, and opposed the first side, a second side comprising at least 45 wt. % silicon oxide, no more than 5 wt. % boron oxide, and 10-50 wt. % aerogel, the aerogel present in the graded layer as a plurality of distinct domains.
Claims20
An article comprising
- a substrate;
- and
- a graded layer having
- a first side disposed adjacent the substrate, the first side comprising 45-85 wt. % silicon oxide in a first glass phase and 10-40 wt. % boron oxide in a second glass phase, and
- opposite the first side, a second side comprising at least 45 wt. % silicon oxide, no more than 5 wt. % boron oxide, and 10-50 wt. % aerogel, the aerogel present in the graded layer as a plurality of distinct domains.
A method for preparing an article, comprising
- providing a porous layer disposed on a substrate, the porous layer having
- a substantially non-porous first side adjacent the substrate, the first side comprising 45-85 wt. % silicon oxide in a first glass phase and 10-40 wt. % boron oxide in a second glass phase, and
- opposite the first side, a second side comprising at least 45 wt. % silicon oxide, no more than 5 wt. % boron oxide, and having pores with a porosity within the range of 10-40 vol. %;
- and
- disposing aerogel in at least a portion of the pores of the porous layer.
Dependencies are inferred from the claim text.