Journal of Textile Research ›› 2021, Vol. 42 ›› Issue (09): 97-103.doi: 10.13475/j.fzxb.20201001307

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Application of catalytic oxidative soaping for polyester/cotton fabric dyeing in one bath

ZHANG Fan1, ZHANG Guobo1, ZHAO Yuxin1, ZHANG Ru1, YANG Hai1, WANG Shihao2, WANG Nanfang1()   

  1. 1. Hunan Provincial Key Laboratory of Environmental Catalysis & Waste Recycling, Hunan Institute of Engineering, Xiangtan, Hunan 411104, China
    2. Peolpe's Government of Wutan Town in Taojiang County, Yiyang, Hunan 413407, China
  • Received:2020-10-07 Revised:2021-06-02 Online:2021-09-15 Published:2021-09-27
  • Contact: WANG Nanfang E-mail:cdwnf@126.com

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Abstract:

In order to increase color fastnesses of the polyester/cotton fabrics dyed by one bath method and promote energy conservation and emission reduction, a novel method of catalytic oxidation based on a metal complex/H2O2 system was introduced into the soaping process of the one bath dyeing of the polyester/cotton fabrics. The complex catalytic activities of Fe(II) citrate and Mn(II) citrate were investigated by using theoretical calculation and soaping experiment. The influence of soaping process parameters on properties of decolorization and K/S value was studied. The comparative experiment was used for valuating the catalytic oxidative soaping and the reduction free cleaning. The optimal catalytic oxidative soaping process was found to be 1.0% Fe(II) citrate complex with 1.0 g/L concentration, and 30% H2O2 with 3.3 g/L concentration, and soaping at 85 ℃ for 25 min. The results show that the catalytic activity soaping performance of Fe(II) citrate complex is higher than that of Mn(II) citrate complex. Compared to the reduction free cleaning, the catalytic oxidative soaping has better wet color fastnesses (over grade 4) with an outstanding ability of decolorizing the dyeing effluent and reducing its toxicity and a prominent potential of energy conservation and emission reduction. The study is helpful for promoting cleaner dyeing production of polyester/cotton fabrics.

Key words: polyester/cotton fabrics, one-bath dyeing, metal complex, hydrogen peroxide, catalytic oxidation, soaping

CLC Number: 

  • TS193.5

Tab.1

Calculated Gibbs energy difference and mulliken charge of complexes in catalyzed reaction systems"

催化剂 配合物 G/(kJ·mol-1) q ΔG/(kJ·mol-1)
PM6 B3LYP/Lanl2dz PM6 B3LYP/Lanl2dz PM6 B3LYP/Lanl2dz
1# [Fe(II)Cit(H2O)3]- -2 088.589 7 -2 914 043.730 3 +1.059 +1.329 394.190 8 157.904 0
[Fe(III)Cit(H2O)3] -1 694.398 9 -2 913 885.826 3 +1.353 +1.392
2# [Mn(II)Cit(H2O)3]- -2 125.059 7 -2 863 251.108 4 +0.672 +1.251 411.859 2 512.794 5
[Mn(III)Cit(H2O)3] -1 713.200 5 -2 862 738.313 9 +1.245 +1.213

Tab.2

Effect of various catalysts on K/S value and effluent decolorization"

组别 催化剂编号 K/S值 脱色率/%
黄组 1# 12.016 0 25.9
2# 12.304 0 13.6
红组 1# 9.542 6 25.0
2# 9.779 2 14.3
蓝组 1# 21.925 27.0
2# 18.675 11.0

Fig.1

Effect of catalyst concentration on decolorization and K/S value"

Fig.2

Effect of H2O2 concentration on decolorization and K/S value"

Fig.3

Effect of soaping temperature on decolorization and K/S value"

Fig.4

Effect of heating rate on decolorization and K/S value"

Fig.5

Effect of soaping time on decolorization and K/S value"

Tab.3

Orthogonal experimental factors level table for catalytic oxidation soaping in yellow group"

水平 A/(g·L-1) B/(g·L-1) C/℃ D/min
1 0.90 2.5 80 25
2 0.95 2.7 85 30
3 1.00 3.0 90 35
4 1.05 3.3 95 40

Tab.4

Orthogonal test results for catalytic oxidation soaping in yellow group"

试验序号 A B C D 织物
K/S值		 残液脱
色率/%
1 1 1 1 1 9.163 85.5
2 1 2 2 2 9.109 86.3
3 1 3 3 3 9.075 86.6
4 1 4 4 4 9.007 87.0
5 2 1 2 3 9.143 85.7
6 2 2 1 4 9.125 86.3
7 2 3 4 1 9.084 86.7
8 2 4 3 2 9.032 87.1
9 3 1 3 4 9.132 86.0
10 3 2 4 3 9.121 86.4
11 3 3 1 2 9.118 86.8
12 3 4 2 1 9.083 87.5
13 4 1 4 2 9.145 86.1
14 4 2 3 1 9.130 86.3
15 4 3 2 4 9.113 87.2
16 4 4 1 3 9.051 87.3
残液
脱色率		 K1 86.350 85.825 86.475 86.525
K2 86.450 86.325 86.700 86.575
K3 86.700 86.825 86.500 86.500
K4 86.725 87.250 86.550 86.625
R 0.375 1.425 0.225 0.125
织物
K/S值		 K1 9.088 50 9.145 75 9.114 25 9.115 00
K2 9.096 00 9.121 25 9.112 00 9.101 00
K3 9.113 50 9.097 5 9.092 25 9.097 50
K4 9.109 75 9.043 25 9.089 25 9.094 25
R 0.025 0.102 5 0.025 0.020 75

Tab.5

Effect of catalytic oxidation system and conventional soaping process on polyester-cotton fabric dyeing properties"

聚酯 组别 K/S值 顶破强力/N 耐摩擦色牢度/级 耐皂洗色牢度/级
干 湿 变色 沾色
棉
催化氧化皂洗 黄组 8.452 3 527.8 5 4 5 4 4
红组 9.216 1 546.8 5 4~5 5 4~5 4~5
蓝组 18.696 3 562.3 5 4 5 4~5 4~5
免还原清洗 黄组 8.515 4 538.9 4 3~4 4 3 3~4
红组 9.301 1 559.2 4 4 4 3~4 3~4
蓝组 18.804 2 574.8 4 3 4 3 3

Tab.6

Toxicity Comparison"

工艺 发光菌存活数
皂洗前 皂洗后
催化氧化皂洗 35 21
免还原清洗 44 650
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