Probing metal-carboxylate interactions in cellulose nanofibrils-based hydrogels using nonlinear oscillatory rheology

Cellulose nanofibrils (CNFs) have gained much attention as part of biocompatible soft hydrogels used in various biomedical applications such as biodegradable scaffolds, biomedicine, tissues, and regenerative medicine. The CNF hydrogels were mediated with metal cations for improved mechanical strengt...

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Bibliographic Details
Published in:Carbohydrate polymers 2023-01, Vol.300, p.120262-120262, Article 120262
Main Authors: Song, Yeeun, Kim, Bogyoung, Park, Jun Dong, Lee, Doojin
Format: Article
Language:English
Subjects:
Cellulose nanofibrils
Hydrogels
Metal cation-carboxylate coordination bonding
Nonlinear viscoelasticity
Rheology
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Summary:Cellulose nanofibrils (CNFs) have gained much attention as part of biocompatible soft hydrogels used in various biomedical applications such as biodegradable scaffolds, biomedicine, tissues, and regenerative medicine. The CNF hydrogels were mediated with metal cations for improved mechanical strength and structural reversibility. Intermolecular interactions in these CNF hydrogels are controlled by metal cation-carboxylate coordination bonding, leading to the creation of interconnected three-dimensional nanofibril structures that produce high structural reversibility. The nonlinear inter- and intra-cycle were investigated viscoelastic responses of these CNF hydrogels by quantitative nonlinear viscoelastic parameters and transient responses. The dynamic and transitional analyses conducted indicate that the structural deformation and recovery characteristics of the CNF hydrogels are affected by the valency number of the metal cations. This property can be carefully chosen to tune the intermolecular interactions between the cellulose nanofibrils to create an efficient interwoven network structure with high structural reversibility that can go through repeated cycles of reformation and yielding. [Display omitted] •Cation-induced highly reversible cellulose nanofibrils hydrogels are synthesized.•Intermolecular interactions are tuned by metal-carboxylate coordination bonds.•Viscoelastic responses are investigated to reveal complex network structures.•Structural deformation and recovery characteristics are quantitatively measured.
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2022.120262