2024/05/20 by Anirban Kundu, Kundu, Anirban, Won Kyung Seong +8
Materials Science · Engineering · #Graphene research and applications #Mechanical Behavior of Composites #Polymer Nanocomposites and Properties
paper · pdf · doi:10.1038/s41467-025-66215-8
We report scientific and technical queries regarding the article reported by Kim et al. 1 , (referred to as ref. 1 hereafter) on the mechanical properties of graphene-poly(methyl methacrylate) (PMMA) composites. The authors described a “float-stacking fabrication” method to make “graphene-PMMA laminates (GPL)” that enabled enhancing stiffness and strength well beyond PMMA alone, reporting values of tensile strength ( \(σ\) ~ 141 MPa) and Young’s modulus ( \(E\) ~ 5.37 GPa), with a stated graphene volume fraction of 0.19%. Our analysis finds that the reported enhancement is mainly due to the heat treatment of the polymer rather than the incorporation of graphene, and the Raman spectroscopy data further indicates large cracks and defects introduced during the hot rolling process. We believe that the queries will aid the audience in better understanding the mechanical response of graphene-PMMA composites.