Abstract: in this paper ionic liquid 1-butyl-3-methylimizolium chloride was applied to modify the
cotton fabric. The modified cotton fabric was characterized by FT-IR spectra, microscopy
determination and the thermogravimetric analysis (DSC). The dyeing performances of the modified
cotton fabric were determined. The results indicated that the dyeing performances of the modified
cotton fabric were more than that of the unmodified cotton fabric.