茜草色素对生物基聚酰胺56的染色性能  

Dyeing properties of madder pigment on bio-based polyamide 56

作　　者：黄连香 王祥荣[1,2] 侯学妮[1,2] 钱琴芳 HUANG Lianxiang;WANG Xiangrong;HOU Xueni;QIAN Qinfang(College of Textile and Clothing Engineering,Soochow University,Suzhou,Jiangsu 215006,China;Textile and Apparel Council Key Laboratory of Natural Dyes,Soochow University,Suzhou,Jiangsu 215123,China;Shenghong Group Co.,Ltd.,Suzhou,Jiangsu 215168,China)

机构地区：[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

出　　处：《纺织学报》2024年第7期94-103,共10页Journal of Textile Research

基　　金：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)。

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。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

关 键 词：天然染料 茜草色素 生物基聚酰胺56 染色 动力学 

分 类 号：TS193.2[轻工技术与工程—纺织化学与染整工程]