Process for the preparation of nano-scaled graphene platelets with a high dispersibility in low-polarity polymeric matrixes and relative polymeric compositions
US9139440B2 · kind B2 · utility
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Key dates
| Filing date | Oct 27, 2010 |
| Grant date | Sep 22, 2015 |
| Priority date | — |
| Expiry date | Jan 9, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2982
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.