靛蓝染色促进剂ZL的合成及其应用

Synthesis and application of promoter ZL to cotton cellulose for indigo dyeing

为提高靛蓝染料对纯棉牛仔布的上染率,以四氯化碳(CCl4)为溶剂,环氧氯丙烷(ECH)为合成单体,在催化剂三氟化硼乙醚(BF3O(C2H5)2)的作用下,预先聚合成聚环氧氯丙烷(PECH),然后用二甲胺胺化制得靛蓝染色促进剂ZL,并对ZL对棉织物的改性工艺进行优化及对其染色深度K/S值和色牢度进行测试。实验结果表明:ZL改性工艺参数为:ZL 2 g/L、NaOH 3 g/L、温度80℃、时间40 min;改性后棉织物靛蓝染色耐洗牢度、摩擦牢度良好,K/S值高达25.06,而相同染色条件下未改性棉织物的K/S值仅为16.60。棉织物经改性剂ZL改性后,浸轧氧化3次靛蓝染色就能达到未改性棉织物浸轧氧化6次的染色效果。

In order to improve the low rate of indigo uptake for cotton fabric, the cationic ring-opening polymerisation of epiehlorohydrin in carbon tetrachloride with boron trifluoride etherate as catalyst produces the polyepichlorohydrin （PECH） polymer. ZL was prepared by the initial polymerisation of epichlorohydrin followed by amination with dimethylamine. And the modification conditions have been optimized, the K/S value and the color fastness had been measured. The conditios were as follow：ZL 2 g/L, NaOH4 g/L, 80 ℃ and 40 rain. Cotton fabric modified by ZL had a significant increase in K/S value which could reach 25.06, while the unmodified was only 16.60. The experiments also showed that the same dye depth as that of 6-passage dyeing in conventional process could be obtained under the process of modification with 2 g/L ZL and 3-passage stock indigo dyeing. Meanwhile, the color fastness is also good.