Fig. 4From: Preparation of Ultrahigh Molecular Weight Polyethylene/Graphene Nanocomposite In situ Polymerization via Spherical and Sandwich Structure Graphene/Sio2 SupportSEM images for RGO-SiO2 spherical supports in different SiO2 content. a, b Quality ratio of SiO2 and GO is 5:1, and magnification of a; c, d 1:1; and e, f 0.5:1. g, h Without SiO2Back to article page