Synthesis of a Novel N-halamine-based Cyclic Polysiloxane and Its Antibacterial Application on Cotton Fabrics

A novel N-halamine-based cyclic polysiloxane compound (KCNCTSi) was synthesized and used as an antibacterial agent on cotton fabric. The structures were characterized by Fourier transform infrared spectra (FTIR). The surface morphology of treated cotton fabrics was tested by scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). The treated cotton fabrics were tested by thermogravimetric analysis (TGA) and showed good thermal stability. The treated cotton fabrics after chlorination exhibited strong antibacterial efficiency against Gram-positive bacteria S. aureus and Gram-negative bacteria E. coli. The E. coli antibacterial rate was about 98.35 % and the S. aureus antibacterial rate was about 99.51 %. The inhibition zones were 1 mm and 1.5 mm against E. coli and S. aureus when KCNCTSi concentration was 350 g/l. The mechanical properties and whiteness were also investigated. As a result of the performed modifications, cotton fabrics with high antibacterial property were obtained.