胺化活性红195/聚合物微球的制备及其在棉织物染色中的应用

针对活性染料水解导致染料利用率低和环境污染等问题,采用乙二胺改性活性红195/聚合物微球制备了胺化活性红195/聚合物微球.探究了初始体系pH值、乙二胺质量分数、改性温度和时间对胺化活性红195/聚合物微球粒径和Zeta电位的影响,并考察在最佳工艺条件下制备的胺化活性红195/聚合物微球染色阳离子化棉织物的K/S值和颜...

Preparation of amino-modified Reactive Red 195/polymer nanospheres and its application on dyeing of cotton fabrics

In view of the problems that hydrolysis of reactive dyes leads to low utilization and environmental pollution, nanospheres were prepared by using ethylenediamine modified Reactive Red 195/polymer. The influence of initial bath pH value, mass fraction of ethylenediamine, temperature and time on the size and Zeta potential of amino-modified Reactive Red 195/polymer nanospheres were discussed, and the K/S values and color parameters of the cationic cotton fabrics dyed with the amino-modified Reactive Red 195/polymer nanospheres under the optimal conditions were investigated. The results show that the amino-modified Reactive Red 195/polymer nanospheres with an average hydration diameter of 96.5 nm, polydispersity index of 0.075 and Zeta potential of -33.7 mV were fabricated after modified with ethylenediamine under the conditions of the initial pH value 11, the mass fraction of ethylenediamine 40%, 60 ℃ for 120 min. The K/S value of the cationic cotton fabric dyed with the amino-modified Reactive Red 195/polymer nanospheres reaches up to 9.3, which is 3.1 times higher than the K/S value of the cotton fabric dyed with same dosage of Reactive Red 195, with improvement of color saturation. The rubbing and washing color fastness of dyed cotton fabrics are both equal to or higher than grade 4.