Abstract: in this paper the dyeing performances of the modified cotton fabric with ionic liquid
1-butyl-3-methylimizolium chloride as modifier was investigated. The effect of pH value, dosage of
ionic liquid, modified time, modified temperature on the dyeing performances of the modified
cotton fabric was determined. The obtained results indicated that after the cotton fabric was
modified by ionic liquid under the alkaline the dyeing performances of the modified cotton fabric
was obviously enhanced. The K/S value of the modified cotton fabric was about 1.42 more than that
of the untreated cotton fabric, the soaping fastness, rubbing fastness and breaking strength also were
obviously enhanced.