Protective fibrous structures based on cellulose fibers functionalized with metal oxide nanoparticles by electrospinning and electrospray deposition

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This work aims to develop a bio-based fibrous material that is able to adsorb and degrade chemical and biological hazardous agents. Thus, cellulosic fabrics (flax) were functionalized with chitosan (CS) and poly(ethylene oxide) (PEO) electrospun nanofibers doped with titanium dioxide (TiO 2 ) and cerium dioxide (CeO 2 ) nanoparticles (NPs). The electrospray deposition of these NPs was also tested. The TiO 2 NPs were synthesized using a very straightforward precipitation method. The successful synthesis was confirmed by Scanning Transmission Electron Microscopy (STEM) and Attenuated Total Reflectance-Fourier-Transform Infrared Spectroscopy (ATR-FTIR). The functionalization of the fabrics with the NPs and the nanofibers doped with NPs was proved by Field Emission Scanning Electron Microscopy (FESEM), ATR-FTIR, and Ground-State Diffuse Reflectance (GSDR). The developed samples presented antibacterial activity against Staphylococcus aureus (ATCC 6538) and Escherichia coli (ATCC 434) , reaching values of 99.97 and 100.0 %, respectively. The degradation of methylene blue (MB) and dimethyl methylphosphonate (DMMP) was evaluated. The best samples were able to decompose 97.82 % of DMMP. The wash durability of the nanocoating was also tested. The developed fibrous structures show great potential for personal protection applications. • Personal protective bio-based fibrous materials were developed. • Flax fabrics were functionalized by electrospinning and electrospray deposition. • Chitosan/PEO nanofibers and TiO 2 and CeO 2 nanoparticles were used. • Antibacterial activity against Staphylococcus aureus and Escherichia coli. • The developed samples showed the degradation of MB and DMMP.