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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/).
Mechanical compressive modulus (mean ± standard deviation) of alginate hydrogels (grey columns) and alginate composite hydrogels with 0.1% w/w of CNFs (black columns) cross-linked with increasing amounts of calcium chloride (3, 6, 12 and 18% w/w).