Hierarchical assembly of nanocellulose‐based filaments by interfacial complexation
Zhang, Kaitao; Liimatainen, Henrikki (2018-08-27)
K. Zhang, H. Liimatainen, Small 2018, 14, 1801937. https://doi.org/10.1002/smll.201801937
This is the peer reviewed version of the following article: K. Zhang, H. Liimatainen, Small 2018, 14, 1801937. https://doi.org/10.1002/smll.201801937, which has been published in final form at https://doi.org/10.1002/smll.201801937. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
In the present study, interfacial complexation spinning of oppositely charged cellulose‐materials is applied to fabricate hierarchical and continuous nanocellulose based filaments under aqueous conditions by using cationic cellulose nanocrystals with different anionic celluloses including soluble sodium carboxymethyl cellulose and insoluble 2,2,6,6‐tetramethylpiperidinyl‐1‐oxy radical‐oxidized cellulose nanofibers and dicarboxylated cellulose nanocrystals (DC‐CNC). The morphologies of the wet and dry nanocellulose based filaments are further investigated by optical and electron microscopy. All fabricated continuous nanocellulose based filaments display a hierarchical structure similar to the natural cellulose fibers in plant cells. As far as it is known, this is not only the first report about the fabrication of nanocellulose based filaments by interfacial complexation of cationic CNCs with anionic celluloses but also the first demonstration of fabricating continuous fibers directly from oppositely charged nanoparticles by interfacial nanoparticle complexation (INC). This INC approach may provide a new route to design continuous filaments from many other oppositely charged nanoparticles with tailored characteristics.
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