Table 2. Transport Mean Free Path and Whiteness Values for Different Cellulose-Based Materials^a.

cellulose particles	ff	lt (μm)	t (μm)	W
CMPs-S	0.24 ± 0.01	21.4 ± 1.0	25.8 ± 1.2	66
CMPs-M	0.25 ± 0.01	6.8 ± 0.3	24.5 ± 1.3	83
CMPs-L	0.25 ± 0.01	2.6 ± 0.04	24.8 ± 0.5	89
CMPs-L	0.39 ± 0.02	1.6 ± 0.1	9.2 ± 0.4	84
CMPs-L	0.53 ± 0.02	0.99 ± 0.05	9.0 ± 0.5	88
CNFs			9	86

^aThe thickness was obtained from SEM, the filling fraction was calculated by the method described in the Characterizations section, and the transport mean free path was obtained by the method described in the Characterizations section. The whiteness of CNF systems was calculated from the raw data in ref (13), where ff, l_t, t, and W are the filling fraction, mean free path, thickness, and whiteness, respectively.