Fig. 1
From: A critical review of the current knowledge regarding the biological impact of nanocellulose
The figure is reprinted with permission from Sacui et al. [96] © (2014) American Chemical Society
Transmission electron microscopy images of selected nanocellulose types. CNCs isolated by HCl (a) and H2SO4 hydrolysis (b) from bacterial cellulose, H2SO4 hydrolysis from tunicate mantles (c) or wood pulp (f) and nanofibrillated cellulose obtained by enzymatic (d), mechanical (e), or 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO) mediated oxidative (g) degradation of wood pulp.