POLYMER DISPERSANTS FOR EXFOLIATION OF GRAPHITES IN SUPERCRITICAL FLUID AND GRAPHENE DISPERSION MADE THEREFROM

摘要

The present invention relates to a dispersant for producing graphene by exfoliating graphite. More specifically, the present invention relates to a novel polymer dispersant for physically exfoliating graphite from a supercritical fluid, a method for producing the same, and a graphene dispersed liquid produced therefrom. The polymer dispersant according to the present invention has a structure of a block copolymer including two parts having graphene affinity and supercritical fluid affinity, thereby easily performing physical exfoliation of graphite from a supercritical fluid and exhibiting excellent a graphene exfoliating rate compared to a conventional emulsifier. Moreover, when being coated on a polymer, a ceramic material, or a steel plate, the polymer dispersant serves as a binder, so a separate binder is not needed. The polymer dispersant also exhibits an excellent barrier function, so the polymer dispersant may be useful in mass-producing graphene.