Stability of Vicugna Pacos Fibers Functionalized with Silver Nps and Their Antibacterial Effect over Time

Hoyos-Honorio R.A.; Zavaleta-Espejo G.; Felix-Quintero H.; Jáuregui-Rosas S.; Saldaña-Jiménez J.; Mejía-Uriarte E.V. · Chemical Engineering Transactions (2025) · DOI: 10.3303/cet25121029

Resumen

This research aimed to evaluate the stability and antibacterial effect of Vicugna pacos “alpaca” white fibers functionalized with silver Nps on Escherichia coli ATCC 25922 over time. An experimental design in completely randomized blocks (DEBCA) was used, considering as blocks the 1st, 2nd, and 3rd months of ageing time and treatments the variations of the concentration of trisodium citrate (TSC) of 2, 6, and 10 mg. The results showed the presence of significant differences in the concentration and ageing time. A comparison of means showed that the antibacterial effect remained almost intact for the highest concentrations of trisodium citrate, while the concentration of 2 mg showed gradual decay. Furthermore, the Raman spectroscopy study indicates that the VPA fibers have not deteriorated due to functionalization with Nps-Ag. Therefore, it is concluded that the fibers functionalized using a high concentration of trisodium citrate are stable and keep their antibacterial effect over time. Copyright

Instituciones: Universidad Nacional de Trujillo