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Updated: Sep 28, 2025
Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation
Published on: June 17, 2014
Rheological properties of wood/bacterial cellulose and chitin nano-hydrogels as a function of concentration and their
Hesamoddin Jannatamani1, Ali Motamedzadegan2, Mohammad Farsi1
1Department of Food Science and Technology Management, Islamic Azad University Sari Branch, Sari, Iran.
Abstract:
In this study, rheological properties of the Wood Cellulose NanoFibers (WCNF), Bacterial Cellulose NanoFibers (BCNF), and Chitin NanoFibers (ChNF) as well as physical properties of films prepared from each nano-hydrogel were investigated. Each nano-hydrogel was prepared in 2 concentrations of 0.5 and 1 wt% for rheological study. Rheological properties were measured using a rotational rheometer. The flow behaviour data were fitted with rheological models. Apparent viscosity was higher in higher concentrations of nano-hydrogels. Herschel-Bulkley model was the best model for flow behaviour data fitting. BCNF nano-hydrogels had the highest hysteresis loop while WCNF nano-hydrogels had the best structure recovery and lowest hysteresis loop. At LVE (Linear Viscoelastic Region), G' (storage modulus) and G″ (loss modulus) had a constant value, but as strain increased their values decreased. Storage modulus was found to be greater than loss modulus in all samples during frequency sweep test. BCNF nano-hydrogel showed the lowest frequency dependency. Chitin nanofilms had the highest elongation and stress value.
