Process for coating a substrate with a carbon-based material
AssigneeGrafoid, Inc.
InventorsRejean Lemay, John A. Ward
Life of this patent
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Abstract
A coating process is described that coats a coil-to-coil continuous substrate with a graphene-like coating. The coating process includes cleaning and activating a substrate, applying a graphene oxide dispersion to the substrate, drying the coated substrate, and exposing the dried coating to VUV radiation under a dry atmosphere. The atmosphere for the last step includes one or more inert gases and optionally one or more reactive gases to repair defects in the coating and/or to functionalize the coating. This coating process allows for the formation of a polygranular graphene-like coating intimately in contact with the substrate. The graphene-like coating coats the substrate with multiple monolayers of graphene in a continuous manner.
Claims16
A process for coating a substrate with a graphene-like coating comprising the steps of:
- cleaning and activating a substrate by simultaneous exposure of the substrate surface to radiation having a wavelength of about 10 nm to about 200 nm and to an atmosphere that comprises oxidizing radical species at or above atmospheric pressure;
- coating the clean and activated substrate with a GO (graphene oxide) coating;
- and
- exposing the GO coating to radiation having a wavelength of about 10 nm to about 200 nm under an atmosphere comprising one or more inert gases of 99.993% purity or better at or above atmospheric pressure to form the graphene-like coating,
- wherein the graphene-like coating comprises a mixture of r-GO (reduced graphene oxide) and graphene.
Dependencies are inferred from the claim text.