Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (02): 125-129.doi: 10.13475/j.fzxb.20181101205

• Dyeing and Finishing & Chemicals • Previous Articles     Next Articles

Rapid pad-steam peroxide bleaching process of cotton woven fabric using a cationic bleach activator

TANG Wenjun1,2, PENG Minghua1, XIANG Zhonglin1,2, SHAO Dongyan1, NI Jiadong1, XU Changhai1()   

  1. 1. Key Laboratory of Eco-Textiles (Jiangnan University), Wuxi, Jiangsu 214122, China
    2. Jiangsu Ecotypic Dyeing and Finishing Technical Critical Laboratory, Jiangsu Lianfa Textile Co., Ltd., Nantong, Jiangsu 226601, China
  • Received:2018-11-02 Revised:2018-11-14 Online:2019-02-15 Published:2019-02-01
  • Contact: XU Changhai E-mail:changhai_xu@jiangnan.edu.cn

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Abstract:

In order to improve the production efficiency and reduce energy consumption in bleaching of cotton woven fabric, a rapid pad-steam peroxide bleaching process was conducted by using a cationic bleach activator of (N-(4-(triethylammoniomethyl)benzoyl)caprolactam chloride (TBCC). Investigations were carried out to analyze the influences of alkalis, concentration of TBCC, steaming time and concentration of peroxide stabilizer by measuring the degree of whiteness and degree of polymerization of the bleached fabrics. It is found that the rapid pad-steam peroxide bleaching process could be optimized by using sodium citrate as pH regulator with a molar ratio of TBCC, hydrogen peroxide and sodium citrate in 1:1.2:1.4. The rapid pad-steam peroxide bleaching process is capable of shortening the steaming time to 4 mins or less, and raising the CIE whiteness index from 36.30% to 80.65%, but cause no apparent fiber damage.

Key words: cationic bleach activator, pad-steam, activated peroxide bleaching, cotton woven fabric

CLC Number: 

  • TS192.1

Tab.1

Formulation of bleaching processg/L"

工艺 TBCC H2O2 柠檬酸钠 碳酸氢钠 氢氧化钠 稳定剂 渗透剂
常规配方1 — x 3.04x — — 3 3
活化配方1 2.72x x 3.04x — — 3 3
常规配方2 — x — 0.87x — 3 3
活化配方2 2.72x x — 0.87x — 3 3
传统配方 — 35 — — 10 3 3

Fig.1

Bleaching process of TBCC-activated peroxide system"

Fig.2

Effect of alkaline agent on fabric whiteness"

Tab. 2

Influence of amount of sodium citrate in TBCC-activated peroxide system on pad-steam bleaching performance"

TBCC
质量浓度/
(g·L-1)		 H2O2
质量浓度/
(g·L-1)		 柠檬酸钠
质量浓度/
(g·L-1)		 TBCC、H2O2
柠檬酸钠
量比		 白度/
%
0 0 0 0 36.03
50 18.5 14.1 1:1.2:0.4 72.86
50 18.5 28.1 1:1.2:0.8 78.31
50 18.5 35.2 1:1.2:1 79.62
50 18.5 42.2 1:1.2:1.2 80.77
50 18.5 49.2 1:1.2:1.4 81.52
50 18.5 56.3 1:1.2:1.6 81.78

Fig.3

Effect of TBCC concentrations with extension of steaming time on fabric whiteness"

Tab. 3

Effect of peroxide stabilizer on degree of whiteness and degree of polymerization of cotton fabric in pad-steam bleaching process"

织物 DM-1403
质量浓度/(g·L-1)		 白度/% 聚合度
未漂 — 36.30±0.52 41 12±56
活化轧蒸 0 80.30±0.77 4 041±73
1.5 80.27±0.41 4 115±67
3 79.81±0.69 4 133±47

Tab.4

Performance comparison of rapid pad-steam and conventional peroxide bleaching processes"

试样处
理方法		 质量浓度/(g·L-1) 汽蒸时间/
min		 漂白性能
TBCC H2O2 柠檬酸钠 氢氧化钠 白度/% 聚合度 聚合度下降率/%
未处理 — — — — — 36.30 4 112±83 —
快速轧蒸 25 9.2 24.61 — 4 80.65 3 957±52 3.77
传统轧蒸 — 35 — 10 30 78.59 2 797±66 31.98
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