Abstract:

In order to enhance the dyeing depth of indigo denim, reduce the dyeing process by increasing theK/S value of denim and realize energy conservation and emissions reduction, this paper studies the modification process and mechanism of the cationic modifier B, discusses the effect of the mass concentration of modifier B, modification temperature, modification time onK/S value, and tests the infrared spectrum and Zeta potential of the cotton fabrics before and after modification, and the dyeing fastness of the cotton fabric after dyeing. The results indicated that the cotton fabric treated with the cationic modifier B was dyed with indigo. Under the same dyeing condition, the dyeingK/S value increased from 10.90 to 20.13. The dyeing depth of the modified cotton fabric after padding twice can be equal to that of the unmodified cotton fabric after padding for 5 times, and the color fastness to soap washing, friction and sunlight were good. The optimized modification process parameters were as follows: 6 g/L modifier B, a modification temperature of 60℃, and a modification time of 20 min. The infrared spectrum showed that the modified cotton fabric had a quaternary ammonium group, and the Zeta potential showed that the surface Zeta potential of the modified cotton fabric changed from-22.1 mV to +8.70 mV.

Key words: indigo denim, dyeing K/S value, cationic modification, dyeing fastness, Zeta potential

摘要：

为提高靛蓝牛仔布染色深度,通过增加牛仔布染色K/S值以减少染色工序,实现节能减排。研究了阳离子改性剂B的改性工艺及机理,探讨了改性剂B质量浓度、改性温度、改性时间对K/S值的影响,并测试了改性前后棉织物的红外光谱和Zeta电位及改性染色后棉织物的染色牢度。结果表明:经过阳离子改性剂B处理后的棉织物再进行靛蓝染色,相同染色条件下染色K/S值从10.90提高到20.13,改性棉织物浸轧2次便可与未改性棉织物浸轧5次染色深度相当,耐皂洗色牢度、耐摩擦色牢度及耐日晒色牢度良好。优化后的改性工艺参数为:改性剂B 6 g/L,改性温度60℃,改性时间20 min。红外光谱表明改性后棉织物带有季铵基团,Zeta电位表明经改性剂B改性后棉织物表面Zeta电位由-22.10 mV转为+8.70 mV。

关键词: 靛蓝牛仔布, 染色K/S值, 阳离子改性, 染色牢度, Zeta电位