纺织学报 ›› 2024, Vol. 45 ›› Issue (07): 94-103.doi: 10.13475/j.fzxb.20230202001

• 染整工程 • 上一篇    下一篇

茜草色素对生物基聚酰胺56的染色性能

黄连香1, 王祥荣1,2, 侯学妮1,2(), 钱琴芳3   

  1. 1.苏州大学 纺织与服装工程学院, 江苏 苏州 215006
    2.苏州大学 纺织行业天然染料重点实验室, 江苏 苏州 215123
    3.盛虹集团有限公司, 江苏 苏州 215168
  • 收稿日期:2023-02-13 修回日期:2024-04-11 出版日期:2024-07-15 发布日期:2024-07-15
  • 通讯作者: 侯学妮(1985—),女,高级实验师,博士。主要研究方向为纺织品清洁生产技术及工艺、纺织品测试等。E-mail:houxueni@suda.edu.cn。
  • 作者简介:黄连香(1996—),女,硕士。主要研究方向为纺织品生态染整加工技术。
  • 基金资助:
    江苏省纺织印染节能减排与清洁生产工程中心开放课题项目(SDGC2107)

Dyeing properties of madder pigment on bio-based polyamide 56

HUANG Lianxiang1, WANG Xiangrong1,2, HOU Xueni1,2(), QIAN Qinfang3   

  1. 1. College of Textile and Clothing Engineering, Soochow University, Suzhou, Jiangsu 215006, China
    2. Textile and Apparel Council Key Laboratory of Natural Dyes, Soochow University, Suzhou, Jiangsu 215123, China
    3. Shenghong Group Co., Ltd., Suzhou, Jiangsu 215168, China
  • Received:2023-02-13 Revised:2024-04-11 Published:2024-07-15 Online:2024-07-15

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摘要：

为探讨天然染料用于生物基聚酰胺56(PA56)的染色可行性,实现PA56的环保染色工艺,通过单因素实验,以染色后织物K/S值为指标,优化了茜草上染PA56织物的染色工艺条件。采用准一级和准二级动力学模型,研究了茜草上染PA56的染色动力学特性,分析了染液pH值及添加剂对染色动力学参数的影响。结果表明:当染液的pH值为4.2,染色温度为80 ℃时,染色保温40 min后可获得一定染色深度的茜草上染PA56织物;经不同金属离子媒染后,染色织物的色牢度和K/S值均有提高;茜草色素在PA56纤维上的染色吸附过程符合准二级动力学模型,随着染色温度的升高,染料平衡吸附量增加,半染时间缩短,扩散系数增大;在染色中加入元明粉或平平加O,或采用预媒染色,都不会改变茜草上染PA56的准二级动力学特征。

关键词: 天然染料, 茜草色素, 生物基聚酰胺56, 染色, 动力学

Abstract:

Objective Madder pigment is a natural dye of bright red color with stable performance. Bio-based polyamide 56 (PA56)is an environment-friendly and excellent bio-based polyamide material. In this research, madder pigment was adopted to dye PA56 fabrics, the dyeing process was optimized,and the dyeing kinetic mechanism was studied. The research results provide a theoretical basis for the application of madder natural dyes to bio-based PA56 fabrics. Furthermore, applying natural dyes to bio-based materials would meet the requirements of circular economy and low-carbon sustainable development.

Method In order to study the dyeing performance of madder on PA56 fabric, the parameters including pH, dyeing time, dyeing temperature and mass fraction of Peregal O were explored to find the optimal conditions. Through K/S value and color characteristics, the influences of mordants and mordant treatment processes were studied. The optimal conditions obtained were subsequently adopted to study the kinetic of madder pigment dyeing. Pseudo first-order and pseudo second-order kinetic models were adopted to examine the mechanism of the adsorption process. Kinetic parameters of madder pigment dyeing on PA56 fiber with different temperature, pH, auxiliaries and mordant were calculated.

Results The results showed that the optimum process for dyeing bio-based PA56 fabrics with madder pigment was as follows: dyeing pH value is 4.2, dyeing temperature is 80 ℃, dyeing time is 40 min and the amount of Peregal O is 1 g/L. After mordant dyeing, the K/S values of the dyed fabrics were significantly increased, and the color characteristics of dyed fabric changes obviously. Compared with the direct dyed fabric, the color fastness of the mordant dyed fabric has been improved. The kinetics of adsorption for different dye temperatures were evaluated by the pseudo first-order and second-order models. A large equilibrium adsorption density difference between the experiment and calculation was observed for the pseudo first-order model, indicating a poor pseudo first-order fit to the experimental data. The experimental data fitted well to the pseudo second-order kinetic model with high correlation coefficient above 0.999. In addition, the C∞ agreed well with both experiment and calculation, suggesting that the second-order kinetic model well describes the adsorption of madder pigment onto PA56 fiber. The half-dyeing time decreased,and the diffusion coefficient increased with increasing temperature. The influences of dyeing pH, auxiliaries and mordant on the dyeing kinetic parameters were further analyzed. With the increase of pH value, the equilibrium adsorption amount decreased, the half-dyeing time was shortened,and the diffusion coefficient was increased. The addition of sodium sulfate and Peregal O reduced the equilibrium dyeing amount and the half-dyeing time of maddering dye. The rate constant (k2) and the diffusion coefficient were increased with the addition of sodium sulfate and Peregal O. After mordant dyeing, the equilibrium adsorption amount was decreased, the half-dyeing time increased and the diffusion coefficient decreased, but K/S values of the dyed fabrics were increased.

Conclusion The optimal conditions and dyed fabric with darker color of bio-based PA56 dyed with madder pigment were obtained. The type and mode of mordant can enrich the color tone and improve the color fastness. Fitting calculations reveal that the dyeing process of madder pigment dyeing on bio-based PA56 fabrics conforms to the pseudo second order kinetic model. Madder has a fast adsorption rate on PA56 fabric. The adsorption capacity was dependent with pH value. The addition of sodium sulfate and Peregal O, as well as the pretreatment with mordant, the dyeing processes also conform to the quasi-second order kinetic model.

Key words: natural dye, madder pigment, bio-based polyamide 56, dyeing, kinetics

中图分类号: 

  • TS193.2

图1

染色pH值、温度和时间对茜草上染PA56织物K/S值的影响"

表1

平平加O质量浓度对茜草上染PA56织物K/S值的影响"

平平加O质量浓度/
(g·L-1)		 K/S值 Sλ λmax/nm
0.5 2.12 0.024 400
1.0 2.14 0.020 400
1.5 2.05 0.018 400
2.0 2.05 0.017 400

图2

媒染对茜草色素上染PA56织物K/S值的影响"

表2

媒染处理对茜草色素染PA56织物颜色特征的影响"

染色
方式		 L* a* b* C* h/
(°)		 λmax/
nm		 K/S值
直接染色 55.76 8.32 3.21 8.92 21.09 400 1.76
硫酸铝
预媒染		 50.20 28.80 10.50 30.66 20.03 510 3.56
硫酸铝
同浴媒染		 49.07 38.33 1.37 38.36 2.05 510 4.39
硫酸铝
后媒染		 50.80 28.02 12.10 30.52 23.37 510 3.12
硫酸铝
预媒染		 31.55 6.66 -9.51 11.62 305.01 560 7.54
硫酸亚铁
同浴媒染		 43.16 11.33 14.47 18.38 308.06 560 3.57
硫酸亚铁
后媒染		 36.25 5.90 -5.87 8.32 315.12 560 5.26

表3

媒染对茜草色素染PA56织物色牢度的影响"

染色方式 耐光
色牢度		 耐皂洗色牢度 耐摩擦色牢度
变色 棉沾 锦沾 干 湿
硫酸铝预媒染 4 4 4~5 4~5 4 3~4
硫酸铝同浴媒染 4 4 4~5 4~5 4 3~4
硫酸铝后媒染 3 4 4~5 4~5 4 4
硫酸亚铁预染媒 4 4 4~5 4~5 4 4
硫酸亚铁同浴媒染 3 4 4~5 4~5 4 3~4
硫酸亚铁后媒染 4 4 4~5 4~5 4 4
直接染色 2 3 4~5 4~5 4 4

图3

茜草色素质量浓度与吸光度的关系拟合曲线"

图4

不同温度下茜草色素上染PA56纤维的吸附曲线"

图5

不同温度下茜草色素上染PA56纤维的准一级和准二级动力学方程拟合曲线"

表4

不同温度下茜草色素上染PA56纤维的准一级和准二级动力学参数"

温度/℃ 准一级动力学参数 准二级动力学参数
回归方程 R2 C∞,exp/
(mg·g-1)		 C∞, cal/
(mg·g-1)		 k1/
min-1		 回归方程 R2 C∞,exp/
(mg·g-1)		 C∞, cal/
(mg·g-1)		 k2/
(g ·mg-1 ·min-1)
60 y=-0.033x+1.626 0.815 16.81 5.09 0.03 y=0.058x+0.132 0.999 16.81 17.39 0.03
70 y=-0.031x+0.956 0.666 16.99 2.61 0.03 y=0.058x+0.055 0.999 16.99 17.21 0.06
80 y=-0.040x+1.000 0.779 17.35 2.72 0.04 y=0.057x+0.044 0.999 17.35 17.57 0.07

表5

茜草色素上染PA56纤维的半染时间和扩散系数"

温度/℃ 半染时间t1/2/min 扩散系数D/(m2·min-1)
60 2.30 1.60 × 10-12
70 0.95 3.88 × 10-12
80 0.77 4.77 × 10-12

图6

不同pH下茜草色素上染PA56纤维的吸附曲线和准二级动力学拟合曲线"

表6

不同pH值下茜草色素上染PA56纤维的准二级动力学参数"

pH值 回归方程 R2 C∞,exp/
(mg·g-1)		 C∞, cal/
(mg·g-1)		 k2/
(g ·mg-1 ·min-1)		 t1/2/min D/
(m2·min-1)
3.2 y=0.058x+0.084 0.999 17.05 17.24 0.04 1.44 2.55×10-12
4.2 y=0.057x+0.044 0.999 17.35 17.54 0.07 0.77 3.09×10-12
5.2 y=0.062x+0.045 0.999 15.83 16.05 0.09 0.72 4.78×10-12
6.2 y=0.087x+0.058 0.999 11.49 11.52 0.13 0.67 5.10×10-12

图7

不同助剂时茜草色素上染PA56纤维的吸附曲线和准二级动力学拟合曲线"

表7

助剂对茜草色素上染PA56纤维的准二级动力学参数的影响"

助剂 回归方程 R2 C∞,exp/
(mg·g-1)		 C∞, cal/
(mg·g-1)		 k2/
(g ·mg-1 ·min-1)		 t1/2/
min		 D/
(m2·min-1)		 K/S值 λmax/
nm
无助剂 y=0.057+0.044 0.999 17.35 17.54 0.07 0.77 4.78×10-12 2.24 400
元明粉 y=0.068x+0.026 0.999 14.33 14.68 0.18 0.38 9.66×10-12 2.17 400
平平加O y=0.081x+0.058 0.999 12.28 12.38 0.11 0.72 5.13 2.14×10-12 400

图8

媒染剂对茜草色素上染PA56吸附曲线的影响"

图9

媒染剂对茜草色素上染PA56的准二级动力学拟合曲线"

表8

媒染剂对茜草色素上染PA56纤维的准二级动力学参数的影响"

媒染剂 回归方程 R2 C∞,exp/
(mg·g-1)		 C∞, cal/
(mg·g-1)		 k2/
(g ·mg-1 ·min-1)		 t1/2/
min		 D/
(m2·min-1)		 K/S值 λmax/
nm
直接染色 y=0.057x+0.044 0.999 17.35 17.54 0.07 0.77 4.78×10-12 1.76 400
硫酸铝预媒染 y=0.080x+0.079 0.999 12.29 12.47 0.08 0.96 3.74×10-12 3.56 510
硫酸亚铁预媒染 y=0.065x+0.117 0.999 15.31 15.34 0.04 1.79 2.06×10-12 7.54 560
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