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

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