Gang Sun

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Introduction of Daylight-Induced Antibacterial and Antiviral Materials

Gang Sun, Department of Biological and Agricultural Engineering, University of California, Davis

Abstract: Daylight-induced antibacterial and antiviral materials were developed by incorporating photoactive agents into polymers and surfaces of fibers. The photo-active agents are safe to be in contact with foods and human skin and can generate reactive oxygen species under daylight exposure. The reactive oxygen species (ROS), including hydroxyl radicals, hydrogen peroxide, and singlet oxygen, are biocides of bacteria and viruses. The materials containing the chemicals can continuously produce the ROS and consequently provide durable and automatic antibacterial and antiviral functions on surfaces of the materials under controlled lighting conditions, which can reduce and prevent transmission of pathogens by human contact. The presentation will focus on the examples of development of antiviral face mask and other polymeric materials in labs. The concept proof research could be applied to food packaging materials as we envision. The general chemistry, mechanism, design, and properties of such functional polymers will be discussed in the presentation.

Acknowledgements: The research was supported by USDA-NIFA (2015-68003-23411) and the COVID-19 Research Accelerator Funding Track Program at the University of California, Davis, CA, USA.

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