| 초록 |
We present a two-dimensional WS2-based material as a reinforcement additive to produce thermally stable, mechanically strong, and light-weight epoxy (EP) composites. An aqueous melamine solution was used to exfoliate the bulk WS2 into nanoplatelets while simultaneously functionalizing them to obtain N-WS2 nanoplatelets. The results demonstrated that the surface free energy of EP composites had been significantly increased after the incorporation of N-WS2 nanoplatelets into EP matrix and increases with increased loading of N-WS2 nanoplatelets up to a maximum value of 54.38 mJ.m-2 for the composite containing 0.18 wt.% of N-WS2 nanoplatelets, suggesting stronger interfacial interaction between EP and N-WS2. The mechanical properties of the EP composites were analyzed and demonstrated 55%, 101%, 44%, and 15% improvements in fracture toughness, fracture energy, flexural strength, and flexural modulus, respectively, for the composite comprising 0.18 wt.% N-WS2 nanoplatelets. |
