Table 1.

Dispersive component of the surface energy (${\mathsf{\gamma }}_s^d$), acid (K_a) and base (K_b) constants and acid/base ratio (K_a/K_b) of the cellulose nanofibrils (CNF) and alginate films at 25 °C.

Sample	${\mathsf{\gamma }}_s^d$ (mJ/m2) *	Ka	Kb	Ka/Kb
CNF	39.79	0.08	0.20	0.4
Alginate	38.66	0.09	0.05	1.8
Alginate with 10 wt % CNF	36.87	0.09	0.04	2.3

* Correlation coefficient between 0.998 and 0.999.