Phys.org May 17, 2023
Researchers in the UK have developed antimicrobial surface film based on sustainable micro fibrillated cellulose. The porosity, and microstructure of the film can be modulated by the formulations and the coating process. They observed a threefold reduction in water contact angles and accelerated water evaporation kinetics on the cellulose film (more than 50% faster than that on a flat glass surface). It exhibited a rapid inactivation effect against SARS-CoV-2 in 5 minutes, following deposition of virus-loaded droplets, and an exceptional ability to reduce contact transfer of liquid, e.g., respiratory droplets, to surfaces such as an artificial skin by 90% less than that from a planar glass substrate. It also showed excellent antimicrobial performance in inhibiting the growth of both Gram-negative and Gram-positive bacteria. It showed nearly 100% resistance to scraping in dry conditions due to its strong affinity to the supporting substrate but with good removability once wetted with water, suggesting its practical suitability for daily use. The coating could be formed on solid substrates readily by spraying, rendering it a scalable, affordable, and green solution as antimicrobial surface coating. Implementing such cellulose films could play a significant role in controlling future pan- and epidemics… read more. Open Access TECHNICAL ARTICLE
Graphical abstract. Credit: ACS Appl. Mater. Interfaces 2023, 15, 17, 20638–20648Â