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. 2017 Mar 15;12(3):e0173743. doi: 10.1371/journal.pone.0173743

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© 2017 Gan et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 1 — (A) Nitrogen concentration and degree of substitution of CC sample. (B) Chemical reaction scheme for carbamation process. (C) Solubility and concentration of cellulose solution. (D) Proposed chemical reaction of cellulose dissolved in LiOH/urea solvent. (E) Postulated chemical reaction for cellulose hydrogel cross-linking process (i). (F) Postulated chemical reaction for cellulose hydrogel cross-linking process (ii).(G) Photo of (1) cellulose solution (2) cellulose hydrogel.