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CPFX -incorporated waterborne polyurethane films with inhibited bacterial biofilm formation on the membrane surfaces. The films were examined under a scanning electron microscope (magnification, ×5,000; scale bar, 10 µm). (A) Control membrane incubated with E. coli for 7 days. (B) Control membrane incubated with S. aureus for 7 days. (C) CPFX membrane incubated with E. coli for 7 days. (D) CPFX membrane incubated with S. aureus for 7 days. CPFX, ciprofloxacin.
