High-concentration aqueous dispersions of graphene using nonionic, biocompatible copolymers

摘要

Methods of using a surface active block copolymer to disperse graphene in an aqueous medium, such dispersions which can be subsequently separated and processed for a range of end-use applications, including biomedical applications.

主权项

1. A method of preparing an aqueous graphene dispersion, said method comprising:
providing a composition comprising a graphitic composition comprising natural graphene, at least one nonionic surface active polymeric component and an aqueous medium; sonicating said composition for at least one of a time and at an energy sufficient to exfoliate said graphene component and disperse said graphene component within said aqueous medium; and centrifuging said sonicated composition for at least one of a time and a rotational rate to separate said dispersed graphene component from undispersed graphitic material.