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. 2020 Dec 28;13(1):81. doi: 10.3390/polym13010081

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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FTIR spectra of (a) cellulose, (b) CMC_as synthesized with 20% (w/v) NaOH concentration, (c) CMC_as synthesized with 30% (w/v) NaOH concentration, (d) CMC_as synthesized with 40% (w/v) NaOH concentration, (e) CMC_as synthesized with 50% (w/v) NaOH concentration and (f) CMC_as synthesized with 60% (w/v) NaOH concentration.