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. 2020 Aug 9;12(8):1780. doi: 10.3390/polym12081780

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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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SEM images of the cross-section of the (a) chitosan/OEO/0% CNFs (COC₀) film; (b) chitosan/OEO/20% CNFs (COC₂₀) film; (c) chitosan/OEO/40% CNFs (COC₄₀) film and (d) chitosan/OEO/60% CNFs (COC₆₀) film.