Light-activated, disposable antiviral and antimicrobial plastic films for PPE and other applications

Idea: Dyes and semiconductor photocatalysts are able to generate a myriad of reactive oxygen species which destroy viruses and bacteria. However, never before has this technology been harnessed to make inexpensive, disposable anti-virial and anti-microbial plastic films before and this is the primary aim of this research proposal. At present in hospitals and care homes thin plastic disposable films are common in PPE (e.g. gowns and aprons) and curtains and coverings for bedside cupboards and tables; but these films do not have any antiviral or antimicrobial activity, despite the fact that this feature is desperately needed as many viruses and bacteria are able to survive on plastic surfaces for several days (for COVID19: it is 3 days!); this project addresses this need. The key work packages involve: (i) Extrusion of thin, flexible antiviral/antibacterial plastic films containing either a visible light absorbing photocatalyst or dye; with different dyes and photocatalysts to be tested to produce an optimised product. (ii) Testing of plastic films for antiviral activity and feedback to film production - so that an optimised product can be generated (iii) Testing of plastic films for antiviral activity and feedback to film production - so that an optimised product can be generated (iv) Engagement with commercial providers of healthcare PPE and related products, such as Clonallon Ltd. a collaborator, in order to identify the best route to market. Potential: As the materials to be used are inexpensive, the method of production of the thin plastic films easily scaled, the likely impact is immeasurable.