One gram of chitosan (CTS) was added to about 200 ml of dilute
acetic acid solution. The solution with pH value of 2.5 was stirred
at 25 ◦C for 0.5 h. After that, 2 g of Ag-loading nano-SiO2 (SLS) powder
was added and the mixture was stirred for 1.5 h meanwhile
the pH value of the system was adjusted to 12. The mixture was
heated to 65 ◦C and 0.03 g of 3% glutaricdialdehyde was added dropwise
to cross-linked chitosan on the surface of SLS particles. After
further heating, the product was separated to get the CCTS-SLS
specimens.
Six grams of wool fiber was washed in acetone and then
dried. The dried wool fiber was exposed to ultraviolet light with
wavelength of 280 nm, both upside and backside were irradiated
equably for predetermined 30 min. After that, the UV-irradiated
wool fiber was impregnated in the CCTS-SLS antibacterial solution