Viscose Fiber-Based Yarns for Aroma Enhancement

Viscose fiber, a regenerated cellulose material, has attracted significant attention for its potential in adsorption applications due to its tunable hydrophilicity, adsorption capacity, and mechanical properties. This study systematically characterizes six different yarns’ composition, physical properties, and adsorption capabilities and investigates the structure-property relationships. It confirmed the fibers’ composition and revealed distinct hydrophilic-hydrophobic variations. Mechanical testing showed 50% strength reduction in wet states compared to dry states due to water-induced disruption of hydrogen bonding. The adsorption behaviors of farnesol, a model of flavor molecule, were governed by the initial rapid surface attachment via hydrogen bonding and van der Waals forces, followed by slower intra-fiber diffusion through the amorphous regions. Temperature-dependent studies (25–45°C) demonstrated a transition from multilayer adsorption (Freundlich model) to monolayer coverage (Langmuir model) at elevated temperatures, with thermodynamic analysis confirming the endothermic nature of the process. The adsorption follows the pseudo-second-order kinetics, indicating chemisorption-dominated adsorption. These findings elucidate the fundamental mechanisms underlying viscose fiber performance and provide a scientific basis for designing advanced cellulose-based functional materials.