Multifunctional Ginger Nanofiber Hydrogels with Tunable Absorption : The Potential for Advanced Wound Dressing Applications

In this study, ginger residue from juice production was evaluated as a raw material resource for preparation of nanofiber hydrogels with multifunctional properties for advanced wound dressing applications. Alkali treatment was applied to adjust the chemical composition of ginger fibers followed by TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl radical)-mediated oxidation prior to nanofiber isolation. The effect of alkali treatment on hydrogel properties assembled through vacuum filtration without addition of any chemical cross-linker was evaluated. An outstanding absorption ability of 6200% combined with excellent mechanical properties, tensile strength of 2.1 +/- 0.2 MPa, elastic modulus of 15.3 +/- 0.3 MPa, and elongation at break of 25.1%, was achieved without alkali treatment. Furthermore, the absorption capacity was tunable by applying alkali treatment at different concentrations and by adjusting the hydrogel grammage. Cytocompatibility evaluation of the hydrogels showed no significant effect on human fibroblast proliferation in vitro. Ginger essential oil was used to functionalize the hydrogels by providing antimicrobial activity, furthering their potential as a multifunctional wound dressing. Funding Agencies|Swedish Foundation for Strategic Research within the HEALiX projectSwedish Foundation for Strategic Research [RMX18-0039]; Bio4Energy; KAW [2018.0451]; WWSC; Kempe Foundations; Coordenacao de Aperfeicamento de Pessoal de Nivel Superior, Brasil (CAPES) [001]