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Abstract
Antimicrobial and antiviral materials have attracted significant interest in recent years due to increasing occurrences of nosocomial infections and pathogenic microbial contamination. One method to address this is the combination of photoactive compounds that can produce reactive oxygen species (ROS), such as hydrogen peroxide and hydroxyl radicals to disinfect microbes, with carrier materials that meet the application requirements. Using anthraquinone (AQ) and cellulose nanocrystals (CNCs) as the photoactive and carrier components, respectively, this work demonstrated the first covalent incorporation of AQ onto CNCs. The morphology and the photoactive properties were investigated, revealing the structural integrity of the CNCs and the high degree of photoactivity of the AQ-CNC materials upon UVA exposure. The AQ-CNCs also exhibited an unexpected persistent generation of ROS under darkness, which adds advantages for antimicrobial applications.
Highlights
Antimicrobial and antiviral materials have been a growing field of interest for researchers due to increasing nosocomial infections and pathogenic microbial contaminations
We have successfully demonstrated a direct esterification reaction between cellulose nanocrystals (CNCs) and anthraquinone carboxylic acid (AQC) for the first time
atomic force microscopy (AFM) revealed that the CNCs retained their structural integrity, which is an advantage for the subsequent production of composite materials
Summary
Antimicrobial and antiviral materials have been a growing field of interest for researchers due to increasing nosocomial infections and pathogenic microbial contaminations. Considerable effort has been devoted to developing surfaces with biocidal functions and self-disinfecting properties [1,2,3], as such modified surfaces could be incorporated into sterile garments and fabrics, thereby reducing the possibility of microbial and/or viral contamination. In this pursuit, the functionalization of materials with light-reactive groups could be used to reduce microbial contamination and viral infection [4].
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