Figure 5
From: Hybridizing wood cellulose and graphene oxide toward high-performance fibers
Schematic illustration of the cross section of (a) a GO microfiber, (b) a GO–NFC hybrid microfiber and (c) a GO–NFC hybrid microfiber after infiltration. The brown lines represent the GO nanosheet and the green dots represent NFC. The GO microfiber exhibits loose GO nanosheet packing and a corrugated rough surface. When NFC is added, the GO-NFC hybrid microfiber possesses a smoother surface and denser packing. After infiltration in the CaCl2 solution, the fiber surface is even smoother and possesses even denser building block packing compared with the GO–NFC hybrid microfiber. SEM images of the surface morphology of (d) the porous GO microfiber, (e) the GO–NFC hybrid microfiber and (f) the GO–NFC hybrid microfiber after metal ion infiltration from the CaCl2 solution. After NFC is added, the surface becomes dense and smooth; however, after infiltration, the fiber becomes exceptionally dense and smooth. SEM images displaying the cross section of (g–i) the GO-NFC hybrid microfiber before and (j–l) after CaCl2 infiltration. GO, graphene oxide; NFC, nanofibrillated cellulose; SEM, scanning electron microscopy.
