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The Effects of morpholine pre-treated and carboxymethylated cellulose nanofibrils on the properties of alginate-based hydrogels

Onyianta, Amaka J.; Castellano, Maila; Dorris, Mark; Williams, Rhodri L.; Vicini, Silvia

Authors

Amaka J. Onyianta

Maila Castellano

Mark Dorris

Rhodri L. Williams

Silvia Vicini



Abstract

The effects of varying percentage loadings of morpholine pre-treated cellulose nanofibrils (MCNF) and carboxymethylated cellulose nanofibrils (CMCNF) on the aqueous swelling, compressive modulus and viscoelastic properties of calcium-ion-crosslinked alginate hydrogels were investigated. In addition, the pore structures of hydrogels with the highest compressive modulus were studied. The incorporation of 5 wt. % MCNF resulted in a slightly reduced aqueous swelling, a 36% increase in compressive modulus and a layered pore structure when compared with the neat alginate hydrogel. On the other hand, the addition of CMCNF at the same loading led to a slightly improved aqueous swelling, an increase in compressive modulus (17%) and high porosity. Further increases in CNF loadings did not result in significant increase in material properties. The alginate/CNF composite materials have potentials to be used in applications where good swelling and mechanical robustness are required.

Citation

Onyianta, A. J., Castellano, M., Dorris, M., Williams, R. L., & Vicini, S. (2018). The Effects of morpholine pre-treated and carboxymethylated cellulose nanofibrils on the properties of alginate-based hydrogels. Carbohydrate Polymers, 198, 320-327. https://doi.org/10.1016/j.carbpol.2018.06.084

Journal Article Type Article
Acceptance Date Jun 19, 2018
Online Publication Date Jun 22, 2018
Publication Date Oct 15, 2018
Deposit Date Jun 28, 2018
Publicly Available Date Jun 23, 2019
Journal Carbohydrate Polymers
Print ISSN 0144-8617
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 198
Pages 320-327
DOI https://doi.org/10.1016/j.carbpol.2018.06.084
Keywords Hydrogels; Alginates; Cellulose nanofibrils (CNF); Carboxymethylation; Surface modification; Compressive modulus
Public URL http://researchrepository.napier.ac.uk/Output/1234603

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