铁盐媒介对靛蓝电化学还原体系的影响

doi:10.13475/j.fzxb.20190104706

摘要/Abstract

摘要：

针对当前电化学染色过程中染料还原率低、染色深度差问题,选择不同价态的铁盐溶液作为媒介与葡萄糖酸钠和Abal B配体形成协同络合体系,对靛蓝染料进行电化学还原。通过染液还原电位、染料还原率、亚铁离子转化率研究不同铁盐媒介的电化学还原能力。结合试验和极差分析探究还原液浓度、电压、通电时间对靛蓝间接电化学还原体系性能的影响,并对其染色工艺进行优化。试验得到的优化还原工艺为:靛蓝染料、FeSO₄·7H₂O、葡萄糖酸钠、Abal B、NaOH质量浓度分别为2.5、15、12、10.5、37.5 g/L,工作电压为10 V,时间为40 min。在此条件下,染料还原率达到89.95%,染色后棉织物染色深度值比传统方法提高4.5%,色光偏红,染色牢度与传统染色相当。

关键词: 靛蓝染料, 电化学染色, 铁盐溶液, 染色深度, 亚铁离子转化率

Abstract:

Aiming at the problems of low dye reduction rate and poor dyeing depth in the current electrochemical dyeing process, this paper reports on the use of iron salt solutions with different valence states as media to form a synergistic complexation system with sodium gluconate and Abal B ligand, to achieve electrochemical reduction of the indigo dye. By controlling dyeing solution reduction potential, dye reduction rate, ferrous ion conversion rate, the effects of different iron salt media on the reduction effect of indigo dyes were studied. The effects of dye concentration, voltage and time on the performance of indirect electrochemical reduction system of indigo dye were investigated. The results show that the optimum process conditions were the concentration of indigo 2.5 g/L, ferrous sulfate 15 g/L, sodium gluconate 12 g/L,Abal B 10.5 g/L, sodium hydroxide 37.5 g/L, working voltage 10 V, and electrification time 40 min. Under these conditions, the reduction rate reached 89.95%, the dyeing depth value of dyeing was improved by 4.5% compared with that of traditional process. The color fastness of the two processes was found similar.

Key words: indigo dye, electrochemical dyeing, iron salt solution, dyeing depth, ferrous ion conversion rate

中图分类号:

TS193.639

汪康康, 李晓燕, 姚继明. 铁盐媒介对靛蓝电化学还原体系的影响[J]. 纺织学报, 2020, 41(01): 75-79.

WANG Kangkang, LI Xiaoyan, YAO Jiming. Effect of different iron salt media on indigo electrochemical reduction system[J]. Journal of Textile Research, 2020, 41(01): 75-79.

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参考文献 20

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媒介编号	媒介	配位体溶液稳定性	配位体溶液还原电位/ mV	还原液还原电位/ mV
1	硝酸亚铁	溶液澄清、稳定、无沉淀	-814	-798
2	硝酸铁	溶液澄清、稳定、无沉淀	-763	-731
3	氯化亚铁	溶液澄清、稳定、无沉淀	-831	-807
4	氯化铁	溶液澄清、稳定、无沉淀	-762	-723
5	硫酸亚铁	溶液澄清、稳定、无沉淀	-842	-816
6	硫酸铁	溶液澄清、稳定、无沉淀	-770	-745

编号	硫酸铁质量浓度/(g·L^-1)	硫酸亚铁质量浓度/(g·L^-1)	配位体溶液还原电位/mV	还原液还原电位/mV	染料还原率/%	亚铁离子转化率/%
1	8	0.0	-770	-745	58.23	86.73
2	6	2.5	-814	-783	67.46	89.24
3	4	5.0	-827	-796	74.67	87.52
4	2	7.5	-825	-802	76.52	90.31
5	0	10.0	-842	-816	81.03	89.65

试验编号	还原液质量浓度增加倍数	电压/ V	通电时间/min	还原液还原电位/mV	染料还原率/%	亚铁离子转换率/%
1^#	1.0	5	20	-797	77.56	94.32
2^#	1.0	10	40	-807	79.75	94.54
3^#	1.0	15	60	-801	77.87	92.24
4^#	1.5	5	40	-857	85.12	95.76
5^#	1.5	10	60	-856	84.77	95.25
6^#	1.5	15	20	-857	85.25	95.37
7^#	2.0	5	60	-890	87.62	95.16
8^#	2.0	10	20	-914	89.95	96.21
9^#	2.0	15	40	-900	89.76	95.73
还原液还原电位	均值1	-801.667	-848.000	-854.000
	均值2	-856.667	-859.000	-854.333
	均值3	-901.000	-852.333	-849.000
	极差	99.333	11.000	6.666
染料还原率	均值1	78.393	83.433	84.253
	均值2	85.047	84.823	84.877
	均值3	89.110	84.293	83.420
	极差	10.717	1.390	1.457
亚铁离子转化率	均值1	93.700	95.080	95.300
	均值2	95.460	95.333	95.343
	均值3	95.700	94.447	94.217
	极差	2.000	0.886	1.126

工艺	L^*	a^*	b^*	K/S值	耐皂洗色牢度/级	耐摩擦色牢度/级
工艺	L^*	a^*	b^*	K/S值	耐皂洗色牢度/级	干	湿
1	29.24	-2.63	-15.29	11.84	5	4~5	3
2	25.32	-1.56	-16.43	12.37	5	4~5	3