Figure 5.

Mechanical properties of isotropic CNF films. a) and b) Representative stress‐strain curves for films with different treatments referred to by color and structure of the line. c) and d) Illustrations of the organization in a biofiber (c) and a vacuum filtered film (d) and how specific ions presumably affect these materials. Data is averaged for at least 4 samples of each type. All the measurements are performed at 50 % RH.