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On-Demand Removal of Bacterial Biofilms via Shape Memory Activation
Huan Gu1, Sang Won Lee1, Shelby Lois Buffington1
1Department of Biomedical and Chemical Engineering, §Syracuse Biomaterials Institute, ⊥Department of Civil and Environmental Engineering, and ∥Department of Biology, Syracuse University , Syracuse, New York 13244, United States.
Abstract:
Bacterial biofilms are a major cause of chronic infections and biofouling; however, effective removal of established biofilms remains challenging. Here we report a new strategy for biofilm control using biocompatible shape memory polymers with defined surface topography. These surfaces can both prevent bacterial adhesion and remove established biofilms upon rapid shape change with moderate increase of temperature, thereby offering more prolonged antifouling properties. We demonstrate that this strategy can achieve a total reduction of Pseudomonas aeruginosa biofilms by 99.9% compared to the static flat control. It was also found effective against biofilms of Staphylococcus aureus and an uropathogenic strain of Escherichia coli.
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