▎ 摘　　要

Large area graphene oxide sheets were synthesized, dispersed in water and used as nanofiller for mechanical improvement in terms of Young's modulus and ultimate tensile strength (UTS) of polyvinyl alcohol (PVA) at low loading. The molecular level dispersion and interfacial interactions between the graphene oxides and polymeric matrix PVA were the real challenges. An excellent improvement in mechanical properties at 0.35 wt% loading was observed. Modulus improved from 1.58 GPa to 2.72 GPa (similar to 71% improvement), UTS improved from 120 MPa to 197 MPa (similar to 65% improvement), and in spite of these improvements, interestingly, there was no fall in elongation at break at this loading.