Functionalized graphene nanosheets obtained by direct shear exfoliation with poly(ionic liquid)s and its PAA composite.

In this study, poly(ionic liquid)s functionalized graphene nanosheets (GNSPIL) were produced directly from graphite by shear exfoliation with the assistance of poly(ionic liquid)s. The chemical structure, as well as thermal, electrical, and mechanical properties of the obtained graphene sheets were characterized by TEM, SEM, AFM, FTIR, TGA, Raman spectroscopy, etc. In addition, a composite of graphene-coated sodium polyacrylate gel sphere (GNSPIL/PAA) was prepared by anion exchange reaction, and the properties of this composite were characterized through a series of techniques. This study showed that the obtained GNSPIL were well dispersed in water without agglomeration. Moreover, the solution-processability of GNSPIL and the easily realized ion exchangeability can greatly expand the application in the field of graphene composites and play an important role in the construction of carbon materials. [Display omitted] • A poly(ionic liquid) (PIL) was synthesized and used to assist the exfoliation of graphite. • PIL functionalized graphene nanosheets were achieved directly from graphite. • The GNSPIL can be constructed to graphene/PAA composite via non-covalent interaction. [ABSTRACT FROM AUTHOR]