Figure 1

SEM images: (a–c) the top face of a glass fibre ply with GNP-based sizing agent, before VARI; (d–f) the top face of sample S1 at different magnification; (g–i) the fracture-section of sample S1 at different magnification.

SEM images: (a–c) the top face of a glass fibre ply with GNP-based sizing agent, before VARI; (d–f) the top face of sample S1 at different magnification; (g–i) the fracture-section of sample S1 at different magnification.