Metal-organic framework-based nanocomposite membrane for formaldehyde adsorption, antibacterial and food packaging

Membranes with outstanding performance fit for increasingly challenging environment are in high demand. ZIF-67/PAN fiber film with polyacrylonitrile (PAN) as the matrix and ZIF-67 nanoparticles as functional material was prepared by solution blow spinning. The phase composition and internal structure characteristics of the membrane were characterized, and its properties toward potential applications were measured. The high surface area and porosity of the membrane exhibited excellent adsorption performance and surface activity, conducive to the adsorption of formaldehyde molecules and PM2.5 particles. The membrane also demonstrated excellent air permeability, thermal dissipation and anti-ultraviolet efficiency, ideally for application in air filtration and food packaging. The effective combination of ZIF-67 and PAN contributed to the antibacterial capability, anti-ultraviolet performance, air filtration, formaldehyde adsorption and degradation, and food packaging. The membrane exhibited robust antibacterial properties with a hypostatic rate against both Staphylococcus aureus and Escherichia coli higher than 99 %. The production process of fiber membrane is facile, highly productive, and the solution blow spinning technology is scalable, indicating that the reported nanocomposite strategy is promising for potential applications in modern human health and industrial fields. • Facile, efficient and scalable production of ZIF-67/PAN fiber membranes by solution blow spinning. • ZIF-67 nanoparticles were uniformly distributed and deposited with stability. • ZIF-67/PAN fiber membranes showed excellent UV resistance and filtration properties. • ZIF-67/PAN fiber membranes can be used for formaldehyde adsorption and decomposition, and food antibacterial preservation.