Process for the preparation of nano-scaled graphene platelets with a high dispersibility in low-polarity polymeric matrixes and relative polymeric compositions
AssigneeVersalis S.P.A.
InventorsRiccardo Felisari, Olga Valentino, Alessandro Casalini
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Abstract
A process for the production of nano-scaled graphene platelets which comprises: a) putting a graphite material in contact with molecular or atomic oxygen or a substance capable of releasing molecular or atomic oxygen, obtaining a precursor consisting of graphite material functionalized with oxygen groups (FOG), characterized by a carbon/oxygen molar ratio higher than 8:1 b) subsequently, reducing (chemically or physically) said FOG precursor obtaining nano-scaled graphene platelets characterized by a carbon/oxygen molar ratio higher than 20:1.
Claims12
A process for producing a nano-scaled graphene platelet, the process consisting of:
- (a) contacting a graphite material with oxygen or ozone, wherein the oxygen or ozone comprises up to 50% by volume of water in the liquid or gaseous state, to provide a precursor comprising a functionalized graphite material comprising oxygen groups and having a carbon/oxygen molar ratio higher than 8:1;
- and subsequently,
- (b) chemically or physically reducing the precursor, to provide a nano-scaled graphene platelet having a carbon/oxygen molar ratio higher than 20:1.
Dependencies are inferred from the claim text.