4 research outputs found
Atropisomers of meso Tetra( N âMesyl Pyrrolâ2âyl) Porphyrins: Synthesis, Isolation and Characterization of AllâPyrrolic Porphyrins
Tuning Optical Properties of BODIPY Dyes by Pyrrole Conjugation for Photoacoustic Imaging
Antimicrobial Personal Protection Clothing: Development of Visible Light Activated Antimicrobial Coatings for Nonwoven Polypropylene Fibers
Abstract During the COVIDâ19 pandemic, the use of polypropylene fleeceâbased personal protection equipment (PPE) increased significantly to over ten million tons. Typically, most PPEs are discarded after a single use, to prevent selfâinfection of users and spread of infectious agents. However, in order to minimize plastic waste without compromising the protective properties of PPE, it is crucial to explore new reusable or longerâlived materials. Here, a visible lightâactivatable antimicrobial photodynamic dye coating for PPEs is presented. In this context, coating with thiomorpholinoâmethylene blue (TMB), derived from methylene blue by introducing two thiomorpholine units, is found to show high antibacterial activity. TMB is integrated into rotary printing suspension, a commercial nitrocelluloseâbased printing matrix. The concentration of TMB in adhesive is optimized, and found that 5% TMB is suitable for coating PPE, for reducing the number of Gramâpositive and ânegative bacteria by 99.99% after 6Â h of white light irradiation. Bacterial filtration efficiency and breathability tested according to EN 14683, confirmed that TMB coating does not affect the filter performance. Thus, this antimicrobial photodynamic dye coating technique offers a promising solution for a safer and extended use of PPE, and reduction of plastic waste generated by PPEs