牦牛绒过氧化氢/过硫酸铵脱色体系工艺优化及其机制

doi:10.13475/j.fzxb.20200807106

纺织学报 ›› 2021, Vol. 42 ›› Issue (04): 101-106.doi: 10.13475/j.fzxb.20200807106

牦牛绒过氧化氢/过硫酸铵脱色体系工艺优化及其机制

潘佳俊¹, 夏兆鹏¹^,², 张海宝³, 卢杨³, 赵吉林³, 王学农³, 王亮¹, 刘雍¹()

1.天津工业大学纺织科学与工程学院, 天津 300387
2.山东省产品质量检验研究院, 山东济南 250102
3.青海省纤维检验局, 青海西宁 810001

收稿日期:2020-08-17 修回日期:2020-12-15 出版日期:2021-04-15 发布日期:2021-04-20
通讯作者: 刘雍
作者简介:潘佳俊(1994—),男,博士生。主要研究方向为天然纤维高值化利用及纤维新材料。
基金资助:
国家市场监督管理总局科技计划项目(2019MK074)

Optimization and mechanism of hydrogen peroxide/ammonium persulfate bleaching for yak wool

PAN Jiajun¹, XIA Zhaopeng¹^,², ZHANG Haibao³, LU Yang³, ZHAO Jilin³, WANG Xuenong³, WANG Liang¹, LIU Yong¹()

1. School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
2. Shandong Institute for Product Quality Inspection, Ji'nan, Shandong 250102, China
3. Qinghai Fiber Inspection Bureau, Xining, Qinghai 810001, China

Received:2020-08-17 Revised:2020-12-15 Online:2021-04-15 Published:2021-04-20
Contact: LIU Yong

摘要/Abstract

摘要：

针对现有商业化牦牛绒脱色过程复杂、脱色时间长等问题,提出新型过氧化氢/过硫酸铵体系牦牛绒脱色工艺。在尽可能提高纤维白度的前提下尽量减少纤维损伤,通过单因素试验确定了脱色时间、过硫酸铵用量和试剂pH值,对脱色工艺进行探讨并与商业化脱色牦牛绒进行比较。结果表明:采用过硫酸铵质量浓度为400 g/L,试剂pH值为9,在室温下脱色为180 min可达到商业脱色牦牛绒的效果,脱色时间节省至原来的1/8;脱色机制分析发现,脱色过程中硫酸根自由基起主要作用,羟基自由基起次要作用。该脱色工艺简单,为牦牛绒高值化利用提供了新的解决方案。

关键词: 牦牛绒, 脱色工艺, 脱色机制, 过氧化氢/过硫酸铵

Abstract:

A novel decolorization process for yak wool with hydrogen peroxide/ammonium persulfate system was proposed to reduce the long decolorization time and shorten the commercial treatment process line. In order to improve fiber whiteness and minimize fiber damage, the effect of the decolorization time, ammonium persulfate dosage and pH value on yak wool in this process were discussed and compared with the commercial decolored yak wool via single-factor tests. The results show that with the decolorization time being 180 min at room temperature, the dosage of ammonium persulfate 400 g/L and pH value 9, and the decolorizing time 1/8 of that of commercial process, the yak wool bleached using this scheme has almost the same quality as that bleached using the commercial process. The bleaching mechanism is analyzed and found that the sulfate radical and the hydroxyl radical in this process played the main and secondary roles, receptively. This bleaching process is easier, providing a new solution for the high value utilization of yak wool.

Key words: yak wool, bleaching process, bleaching mechanism, hydrogen peroxide/ammonium persulfate

中图分类号:

TS192.5

潘佳俊, 夏兆鹏, 张海宝, 卢杨, 赵吉林, 王学农, 王亮, 刘雍. 牦牛绒过氧化氢/过硫酸铵脱色体系工艺优化及其机制[J]. 纺织学报, 2021, 42(04): 101-106.

PAN Jiajun, XIA Zhaopeng, ZHANG Haibao, LU Yang, ZHAO Jilin, WANG Xuenong, WANG Liang, LIU Yong. Optimization and mechanism of hydrogen peroxide/ammonium persulfate bleaching for yak wool[J]. Journal of Textile Research, 2021, 42(04): 101-106.

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pH值	直径/μm	线密度/dtex	断裂强力/cN	断裂强度/ (cN·dtex^-1)
8	17.24	3.08	6.45	2.09
9	17.94	3.34	6.23	1.87
10	18.55	3.57	4.73	1.32

过硫酸铵质量浓度/(g·L^-1)	直径/μm	线密度/dtex	断裂强力/ cN	断裂强度/ (cN·dtex^-1)
300	17.47	3.17	6.28	1.98
350	18.09	3.39	6.46	1.91
400	18.85	3.69	6.84	1.85

脱色时间/ min	直径/μm	线密度/dtex	断裂强力/ cN	断裂强度/ (cN·dtex^-1)
180	18.15	3.42	6.82	1.99
210	17.77	3.28	6.48	1.97
240	18.06	3.38	6.06	1.79

脱色工艺	白度/%	断裂强度/ (cN·dtex^-1)	脱色时间/h
本文脱色工艺	73.45	1.87	3
商业化脱色工艺	78.89	1.82	24

牦牛绒过氧化氢/过硫酸铵脱色体系工艺优化及其机制

Optimization and mechanism of hydrogen peroxide/ammonium persulfate bleaching for yak wool

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