染座剂改性棉织物活性染料的染色性能

为减少活性染料染色过程中无机盐的用量，用染座剂对棉织物进行改性以增加棉纤维上的染座数目。研究棉织物经染座剂改性后对活性染料染色性能的影响，包括改性对碱用量和加入时间的影响，对无机盐用量的影响，对上染速率的影响，对染色牢度、匀染性和色光的影响等。结果表明，改性棉织物对活性红R02的吸附符合Langmuir模型，Langmuir吸附常数K和饱和吸附量S都随温度升高而降低，染座剂改性后最佳碱用量减少，碱加入时间与常规染色一致，染色时无机盐质量分数可以减少40%～60%，上染速率增加，染色牢度和匀染性有所改善，色光不受影响。

Dyeability of cotton fabric modified with dye-site improver

To reduce the amount of salt in dyeing cotton with reactive dyes,the dye-site improver was used to impart cotton fibers increased dye-sites.The effects of modification with dye-site improver on the dyeability of cotton fabric were investigated,including effects on alkaline concentration and adding time,salt concentration,dye-uptake rate,color fastness,level dyeing property and hue of the dyed fabric.The results show that the absorptive behavior of the modified cotton during dyeing with Reactive Red RO2 was conformed with Langmuir-type adsorption curve,and adsorption constant(K) and saturated adsorbing capacity (S) decreased along with rising of the temperature.The dye-site improver modified cotton needed less alkaline,less salt (reduced by 40%-60% on weight ),exhibited accelerated dye uptake rate,improved color fastness and level dyeing without affecting the shade.As to adding time of alkali,it was similar to traditional dyeing process.