UV-induced grafting of organic–inorganic antibacterial membrane on wool fiber

Wool fiber was modified by UV irradiation and then reacted with cross-linked chitosan-coated Ag-loading nano-SiO2 (CCTS-SLS) composites to prepare antibacterial wool fiber. The results show the topography of wool surface was also modified along with the formation of active radicals during UV irradiation. These active groups were used to graft antibacterial materials CCTS-SLS. Compared with parent wool fiber, the antibacterial wool fiber was improved in dyeing property. The dyeing uptake increased by 98% in a dyeing time of 50 min. Also, the antifelting performance increased as a result of the decrease in directional frictional effect after UV irradiation modification.

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► UV irradiation could modify the topography of wool surface.
► The active radicals were formed to graft antibacterial materials.
► Dense antibacterial layer was coated on the wool substrate.
► The dyeing uptake was increased by 98% in a dyeing time of 50 min.
► The anti-felting property was added with the reduced directional frictional effect.