Preparation and Viscoelastic Properties of Composite Fibres Containing Cellulose Nanofibrils: Formation of a Coherent Fibrillar Network

Figure 4

Scanning electron micrographs showing the fracture surface of a fibre containing 10 wt-% C-CNF (a) and one containing 30 wt-% C-CNF (b). The surface (outer) area can be seen in the bottom right corner (a) and bottom left corner (b) of the micrographs.

(a)

(b)