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. 2020 Nov 24;12(12):2779. doi: 10.3390/polym12122779

Figure 5.

Figure 5

SEM images of the morphology of (a) TEMPO oxidized CNF (adapted with permission from Kobayashi, Y.; Saito, T.; Isogai, A. Aerogels with 3D Ordered Nanofiber Skeletons of Liquid-crystalline Nanocellulose Derivatives as Tough and Transparent Insulators. Angewandte Chemie International Edition 2014, 53, 10394–10397 [46], (b) 2,3-dicarboxyl CNF aerogel (adapted with permission from Plappert, S.F.; Nedelec, J.; Rennhofer, H.; Lichtenegger, H.C.; Liebner, F.W. Strain Hardening and Pore Size Harmonization by Uniaxial Densification: A Facile Approach Toward Superinsulating Aerogels from Nematic Nanofibrillated 2, 3-Dicarboxyl Cellulose. Chemistry of Materials 2017, 29, 6630–6641 [35]. Copyright (2017) American Chemical Society) and (c) enzymatically pre-treated TEMPO oxidized freeze-dried from tert-butanol CNF [85] (Reprinted from Composites Science and Technology, 71, Sehaqui, H.; Zhou, Q.; Berglund, L. A., High-porosity aerogels of high specific surface area prepared from nanofibrillated cellulose (NFC), 1593–1599, Copyright 2011, with permission from Elsevier).