Nonwoven supported temperature-sensitive poly(N-isopropylacrylamide)/ polyurethane copolymer hydrogel with antibacterial aetivity

This article is focused on the study of the antibacterial activity of temperature sensitive poly(N-isopropylacrylainide/polyurethane (PNIPAAm/PU) hydrogel grafted non-woven fabrics with chitosan modification, A series of temperature sensitive hydrogel grafted nonwoven fabrics with different N-isopropylacrylamide/polyurethane (NIPAAm/PU) feeding ratios have been synthesized by using ammonium persulfate (APS) as initiator and N,N,N′,N′-tetramethyl-ethane-l,2-diamine (TEMED) as accelerator. FTIR and XPS were used to examine the surface modification of chitosan. The phase transition temperature of hydrogel grafted nonwoven fabrics was about 32°C by DSC. S. aureus and E. cott were used to evaluate the antibacterial efficiency of the fabric composite. After chitosan modification, the hydrogel grafted nonwoven cellulose fabrics demonstrates an antibacterial activity to S. aureus. and E, coll and the antibacterial efficiency is about 80%.