Abstract
Nano-ZnO was successfully synthesized by a sol-gel method with an average size of 26.1 nm. The nano-ZnO was applied to coat the knitted poly(lactic acid) (PLA) fabric with or without further coating using a polyacrylate binder, and the UV protection ability and antibacterial activity of the coated fabric were determined. The results showed that coating with nano-ZnO alone was not able to impart good UV protection ability and antibacterial activity to the fabric, indicating the poor affinity of nano-ZnO to PLA fiber. The nano-ZnO sol coating followed by binder coating was able to give very high UV protection factor (38.3) and antibacterial activity (98.5%). The adhesive force of the binder contributed to the increased fixation of nano-ZnO on the fabric. In addition, the initial dosage of the binder had no significant impact on the UV protection ability of the fabric.
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