A Process for Preparing Graphene
AssigneeKainos Innovation Limited
InventorsPaul Ladislaus, Andrew James Goodwin, Richard John Price
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Abstract
A process for preparing a product comprising one or more graphene layers, the process comprising: producing hydro-dynamic cavitation in a liquid medium comprising a diaromatic component to synthesise the one or more graphene layers from the diaromatic component.
Claims42
A process for preparing a product comprising one or more graphene layers, the process comprising:
- producing hydrodynamic cavitation in a liquid medium comprising a diaromatic component to synthesise the one or more graphene layers from the diaromatic component.
The process of any preceding claim, wherein the liquid medium is subjected to a flow with a cavitation number (CN) of more than 1, optionally more than 2.
The process of any preceding claim, wherein the liquid medium is kept at a temperature of less than 50° C.
The process of any preceding claim, wherein the liquid medium is kept at a temperature within a range of plus/minus 5° C.
The process of any preceding claim, wherein the liquid medium is recycled and cavitation is repeatedly produced therein.
The process of any preceding claim, wherein the product comprises one or more heteroatom impurities.
The process of any preceding claim, wherein the product is oxidised.
The process of any preceding claim, wherein the product has a C/heteroatom ratio of at least 3.
The process of any preceding claim, wherein the product is functionalised.
The process of any preceding claim, wherein the product comprises a graphene nanomaterial, optionally selected from graphene, bilayer graphene, few-layer graphene, or multi-layer graphene.
The process of any preceding claim, wherein the product comprises a substrate-borne graphene material formed by synthesising the one or more graphene layers on substrate particles.
The process of any preceding claim, wherein the diaromatic component comprises optionally substituted fused or linked diaromatic hydrocarbons or heterocycles.
The process of any preceding claim, wherein the diaromatic component is a diaromatic hydrocarbon component consisting of one or more optionally substituted diaromatic hydrocarbons.
The process of any preceding claim, wherein the diaromatic component comprises one or more compounds of Formula A or Formula B, or heterocyclic variants thereof, optionally substituted with one or more moieties at one or more of the numbered positions:
The process of any preceding claim, wherein the diaromatic component comprises methylnaphthalene or ethylnaphthalene, and optionally naphthalene.
The process of any preceding claim, wherein the diaromatic component comprises 1-methylnaphtahlene.
The process of any preceding claim, wherein the liquid medium comprises a stabilising component for stabilising the dispersion of graphene nanomaterial to be formed.
The process of any preceding claim, wherein the liquid medium comprises a functionalising component and functionalised graphene product is synthesised.
The process of any preceding claim comprising cavitating the liquid medium in the presence of oxygen or another heteroatom impurity.
The process of any preceding claim, wherein the liquid medium has an initial boiling point in the range of from 180 to 300° C.
The process of any preceding claim, wherein a dispersion of substrate particles is added to the liquid medium before cavitation and one or more graphene layers are formed on the substrate particles.
The process of any preceding claim, wherein the product is synthesised as a dispersion in the liquid medium and is subsequently separated from the liquid medium.
The process of any preceding claim, wherein a continuous feed of the liquid medium is cycled through a constriction to produce the hydrodynamic cavitation.
A product comprising one or more graphene layers obtainable by a process according to any preceding claim.
A substrate-borne graphene material comprising substrate particles bearing one or more graphene layers.
Dependencies are inferred from the claim text.