Chitosan-reinforced cellulosic bionogels: Viscoelastic and antibacterial properties
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2020
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Villar-Chavero, M. Mar, et al. «Chitosan-Reinforced Cellulosic Bionogels: Viscoelastic and Antibacterial Properties». Carbohydrate Polymers, vol. 229, febrero de 2020, p. 115569. https://doi.org/10.1016/j.carbpol.2019.115569.
Abstract
New chitosan-reinforced cellulosic bionogels were successfully formulated with different chitosan loadings (0.25, 0.5, 0.75, and 1 wt/wt. %). These materials were developed using cholinium lysinate, a bio-ionic liquid, being an ecological alternative to conventional ionogels. The rheological properties of these materials showed. that all the studied viscoelastic properties were higher (elastic moduli, G'; loss moduli, G”; and complex viscosity, η*) as the chitosan loading increased. The reinforced bionogels were physical weak gels, and the proposed mechanism of formation was by hydrogen bonds. The bionogel with 1 wt/wt. % chitosan loading exhibited the highest viscoelastic properties (for 4 Hz, G': 552 kPa, G”: 99 kPa, and η*: 22 kPa·s). Regarding the antibacterial properties, these gels showed a good inhibitory capacity to S. aureus and E. coli, especially against the latter bacterium. For these reasons, these novel ecofriendly gels are promising in the pharmaceutical/medical and biosensors sectors to develop new functional materials.