Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (06): 86-92.doi: 10.13475/j.fzxb.20190500207

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Kinetic and thermodynamic of reactive dye study on silk fabric modification in ethanol/water system

ZHANG Wei1, MAO Qingkai1, ZHU Peng1, CHAI Xiong2, LI Huijun1()   

  1. 1. College of Textiles and Clothing, Xinjiang University, Urumqi, Xinjiang 830046, China
    2. Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China
  • Received:2019-05-04 Revised:2020-02-26 Online:2020-06-15 Published:2020-06-28
  • Contact: LI Huijun E-mail:lihuijun@xju.edu.cn

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Abstract:

In order to further improve the dyeing depth of silk, on the dyeing of cationic surfactant-modified silk in the ethanol/water system by Reactive Red 3BS was reported. The effects of temperature, pH value, material ratio (o.w.f) and time on the modified silk were analyzed. The kinetics and thermodynamic mechanisms of the modified silk in the ethanol/water system were explored. The experimental results show that the temperature is the factor influencing the K/S value, the light and dark value, the red and green value, the yellow and blue value and the total color difference of the modified silk. As the temperature increase, the dyeing rate constant demonstrates an increase and then decreased afterwards. The saturated adsorption amount, partition coefficient and standard affinity gradually increases while the half dyeing time gradually decreases. The dyeing enthalpy is -28.693 kJ/mol, and the dyeing entropy of the modified silk is -0.066 kJ/(℃·mol), indicating that the dyeing process of the modified silk in ethanol/water is exothermic. It is noted that although the dyed depth of the modified silk was improved, the dyeing fastness shows no substantially change.

Key words: cationic surfactant, silk fabric, ethanol/water system, dynamics, thermodynamics, reactive dye

CLC Number: 

  • TS193

Tab.1

Reactive Red 3BS dyed silk fabric modified orthogonal test"

试验号 温度/℃ pH值 染料用量/
%(o.w.f)		 时间/min K/S值 L* a* b* DE*
1 60 2 1 30 1.44 65.12 37.64 -8.17 49.27
2 60 6 2 40 3.37 55.76 47.51 -8.32 62.10
3 60 10 3 50 3.94 52.51 46.39 -8.69 63.29
4 75 2 2 50 7.20 47.28 51.62 -6.40 69.83
5 75 6 3 30 8.78 45.52 55.12 -4.62 73.18
6 75 10 1 40 4.04 50.83 49.57 -7.66 66.40
7 90 2 3 40 8.98 45.53 55.18 -4.64 73.23
8 90 6 1 50 6.62 49.07 53.89 -5.55 70.25
9 90 10 2 30 6.07 49.96 52.53 -6.66 68.92
K1 2.92 5.87 4.03 5.43
K/S值 K2 6.67 6.26 5.55 5.46
K3 7.22 4.68 7.23 5.92
极差R 4.30 1.58 3.20 0.49
K1 57.80 52.64 55.01 53.53
L* K2 47.88 50.12 51.00 50.71
K3 48.19 51.10 47.85 49.62
极差R 9.92 2.52 7.16 3.91
K1 43.85 48.15 47.03 48.43
a* K2 52.10 52.17 50.55 50.75
K3 53.87 49.50 52.23 50.63
极差R 10.02 4.02 5.20 2.32
K1 -8.39 -6.40 -7.13 -6.48
b* K2 -6.23 -6.16 -7.13 -6.87
K3 -5.62 -7.67 -5.98 -6.88
极差R 2.77 1.51 1.15 0.40
K1 58.22 64.11 61.97 63.79
DE* K2 69.80 68.51 66.95 66.91
K3 70.80 66.20 66.20 67.79
极差R 12.58 4.4 4.98 4.00

Fig.1

Dyeing rate curve of Reactive Red 3BS on modified silk fabric"

Fig. 2

t-t/qt fitting adsorption line of Reactive red 3BS on modified silk fabric"

Tab.2

Adsorption kinetic parameters of Reactive Red 3BS on modified silk fabric"

温度/℃ t-t/qt拟合线性方程 染色速率常数k/(g·min·mg-1) 饱和吸附量q∞/(mg.g-1) 半染时间t1/2/min
60 y=0.064 60x+1.310 92 0.003 18 15.479 88 20.314 46
75 y=0.052 39x+0.768 95 0.003 57 19.087 61 14.675 07
90 y=0.045 47x+0.650 49 0.003 18 21.992 52 14.298 74

"

Fig.4

Fitted adsorption isotherms of Reactive Red 3BS on modified silk fabric. (a) Nernst model; (b) Langmuir model; (c) Freundlich medel"

Tab.3

Partition coefficient and dyeing affinity of Reactive Red 3BS on modified silk fabric"

温度/℃ 分配系数K 标准亲和力-Δμ0/
(kJ·mol-1)
60 11.256 98 6.706
75 6.870 85 5.579
90 4.778 27 4.722

Tab.4

K/S values of modified and unmodified silk fabric"

处理条件 K/S值 标准偏差S
未改性 7.64 0.197
改性 8.13 0.234

Fig.5

Dyeing physical drawing of silk fabric. (a) Unmodified silk fabric; (b) Modified silk"

Fig.6

SEM image of unmodified silk fabric"

Fig.7

SEM image modified dyed silk fabric"

"

织物 耐皂洗色牢度 耐摩擦色牢度
棉沾色 毛沾色 变色 干摩 湿摩
未改性蚕丝织物 4 4~5 4~5 4~5 4
改性蚕丝织物 4 4 4~5 4 4
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