Abstract
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 (~71% improvement), UTS improved from 120 MPa to 197 MPa (~65% improvement), and in spite of these improvements, interestingly, there was no fall in elongation at break at this loading.
Acknowledgments
We appreciate the financial assistance from the Higher Education Commission of Pakistan (Grant/Award Number: “pin-IRSIP13-Engg.01”) through the International Research Support Initiative Programme to conduct this work, with the group of Professor Jonathan N. Coleman, School of Physics, Trinity College Dublin, Republic of Ireland.
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