▎ 摘　　要

In this paper, the hydrophobic and modal properties of the graphene nanofiller-reinforced polymer composites are investigated using an experimental approach. The graphene nanofiller-dispersed epoxy composite enhanced hydrophobic properties compared to pure epoxy, as these composites exhibited high contact angles and reduced water absorption after the experimental testing for water absorption and contact angle analysis. The enhanced performance of the graphene nanofiller composite was mainly attributed to the formation of a passive film from uniformly dispersed graphene nanofillers, which acted as a physical barrier on the composite surface. The graphene nanofillers in the epoxy composite surface during curing resulted in creating a hydrophobic surface, thereby altering the surface energy and intensifying the hydrophobicity of the epoxy surface. The work of adhesion and spreading coefficients were also determined for the composites. This study also analyses and compares the modal properties by performing an impact hammer test. The results showed that the reinforcement of graphene nanofillers in the composites significantly enhances the modal properties of the composites.