Dispersion solution of graphene nanosheet and preparation method of dispersion solution

• Main Authors: WU MIN, KOGA SHIGENORI, SUN PEIPEI, HUANG YONG
• Format: Patent
• Language: English
• Published: 03.06.2015
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS

The invention discloses a dispersion solution of a graphene nanosheet and a preparation method of the dispersion solution. The preparation method of the dispersion solution comprises the following steps: mixing unprocessed graphite material with a solid high polymer, grinding, wherein the high polymer is used as a dispersion phase to accelerate the peeling of graphite in the grinding process to carry out olefination of the graphite, mixing graphene nanosheet with the solid high polymer at the nanoscale, thereby effectively inhibiting re-aggregation of the prepared graphene nanosheet; and dissolving the high polymer in a graphene high polymer solid mixed powder and removing the dissolved high polymer to prepare the dispersion solution of the graphene nanosheets. By virtue of the method, a large quantity of graphene nanosheet materials in which the solid high polymer is stably dispersed can be prepared by mechanically grinding; the method is simple and is liable to operate and low in cost; the prepared graphene nanosheet can be applied to the application of any graphene nanosheets; the hydrophilic high polymer performs the surface hydrophilicity modification of the graphene nanosheet, so that the prepared graphene nanosheet can also be used as a waterborne conductive coating.