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

Figure 3

Optical micrographs of the extruded composite fibres. From left to right: unfilled PEG, fibre with 10 wt-% C-CNF, fibre with 30 wt-% C-CNF, fibre with 30 wt-% nongrafted T-CNF, and fibre with 30 wt-% grafted T-CNF. The diameter of the fibres was  mm.