▎ 摘　　要

NOVELTY - Functional ink comprises graphene nano sheet, carrier liquid and polyvinyl alcohol in a ratio of 0.01:1-0.05:1, the carrier liquid is a mixture of ethylene glycol, ethanol and water; where the volume ratio of ethylene glycol: ethanol: water is 25-35:60-70:1-10. USE - The graphene dispersion is useful in a functional ink, which is useful for printing electronic as conductive material or filler part in the complex material system to enhance the electricity, heat or mechanical properties. ADVANTAGE - The functional ink is suitable for graphene sources of nano-sheet, and the used carrier liquid component is non-toxic, environmentally-friendly, and non-dispersant suitable for mass production of the graphene.