Different chemical groups modification on the surface of chitosan nonwoven dressing and the hemostatic properties

The hemostatic properties of surface modified chitosan nonwoven had been investigated. The succinyl groups, carboxymethyl groups and quaternary ammonium groups were introduced into the surface of chitosan nonwoven (obtained NSCS, CMCS and TMCS nonwoven, respectively). For blood clotting, absorbance value (0.105 ± 0.03) of NSCS1 nonwoven was the smallest (CS 0.307 ± 0.002, NSCS2 0.148 ± 0.002, CMCS1 0.195 ± 0.02, CMCS2 0.233 ± 0.001, TMCS1 0.191...