Patent ID: 8696938
Filing Date: 2014-04-15
Classification: B82Y,C01B,C01P,Y02P

Abstract:
1. A process for producing a nano graphene platelet (NGP) material, said process comprising: (i) subjecting a graphitic material to a supercritical fluid at a first temperature and a first pressure for a first period of time in a pressure vessel, wherein said supercritical fluid contains no coating agent solubilized therein and no intercalating agent or oxidizing agent is used in the process, and said graphitic material comprises no previously intercalated graphite and said graphitic material is selected from the group consisting of natural graphite, artificial graphite, graphite oxide, graphite fluoride, graphite fiber, carbon fiber, carbon nano-fiber, carbon nano-tube, soft carbon, hard carbon, and combinations thereof; and then (ii) rapidly depressurizing said fluid at a fluid release rate sufficient for effecting exfoliation of said graphitic material to obtain said NGP material.