水基液体分散染料的放置稳定性评价研究

2021-08-16 09:44:20石瑜博艾丽肖瀛洲朱亚伟
丝绸 2021年7期

石瑜博 艾丽 肖瀛洲 朱亚伟

摘要: 水基液体分散染料具有节能减排和低环境污染的优势,而静态放置稳定性是影响其应用性能的重要指标。文章为了得到快速评价液体分散染料放置稳定性的方法,研究了不同液体染料的剪切流动性、温度流变性和水稀释吸光度变化与其放置稳定性之间的关系。结果表明,黏度增加温度(T0值)和水稀释吸光度变化率(A10)可作为快速评价液体染料稳定性的指标,T0值>55 ℃,A10<10%,且剪切应力和剪切速率呈一元线性关系的假塑性或塑性液体染料,其静态放置稳定性超过1年;而离心稳定性和热放置稳定性并不能反映出液体分散染料静态放置稳定性的优劣。

关键词: 液体分散染料;剪切速率;黏度;稳定性;快速评价

中图分类号: TS193.638

文献标志码: A

文章编号: 10017003(2021)07004407

引用页码: 071108

DOI: 10.3969/j.issn.1001-7003.2021.07.008(篇序)

Study on the evaluation of the storage stability of water-based liquid disperse dyes

SHI Yubo1, AI Li2, XIAO Yingzhou3, ZHU Yawei1,4

(1.College of Textile and Clothing Engineering, Soochow University, Suzhou 215021, China; 2.College of Chemistry andChemical Engineering, Wuhan Textile University, Wuhan 430200, China; 3.Zhuji Yuezhou New Material Co., Ltd.,Shaoxing 311803, China; 4.National Engineering Laboratory for Modern Silk, Suzhou 215123, China)

Abstract: Storage stability is an important index that affects the application performance of water-based liquid disperse dyes which have obvious advantages of energy saving, emission reduction and low environmental pollution. The relationship between the shear fluidity, temperature rheological property and water dilution absorbance of liquid dye and its storage stability were studied, so as to quickly evaluate the storage stability of liquid disperse dyes. The results have shown that the viscosity increased temperature(T0) and water dilution absorbance change rate(A10) can be used as indicators for rapid evaluation of liquid dye stability. For pseudoplastic or plastic liquid dyes, when the value of T0 was greater than 55 ℃ and A10 less than 10%, and the shear stress and shear rate are linearly correlated, the stable storage time of liquid disperse dyes could be more than 1 year. Meanwhile, the stability of centrifugal and thermal storage cannot reflect the advantages and disadvantages of regular storage.

Key words: liquid disperse dye; shear rate; viscosity; stability; rapid evaluation

收稿日期: 20201226;

修回日期: 20210619

基金項目:

作者简介: 石瑜博(1997),男,硕士研究生,研究方向为染料商品化技术及纺织印染新技术。通信作者:艾丽,讲师,lai@wtu.edu.cn。

液体分散染料因化料方便、计量准确、分散性良好、无粉尘污染、无需喷雾干燥、废水和废渣排放低、染料利用率高和色牢度优良等优势得到了重视。基于液体分散染料,采用“增材加工”原理提出的“微量印花”概念[1-2],从原理上阐明了实现低耗水和低污染的涤纶直接印花的可行性,明确了液体分散染料的优势和有机硅改性黏合剂[3-5]、改性聚丙烯酸酯[6-7]在涤纶印花和连续热溶染色中的作用[8],带动了液体分散染料商品化的快速发展。液体分散染料得到了染料制造商的重视,龙盛、吉华、润土、万丰和安诺其等公司相继开发和推出了低污染和低能耗的标准化系列液体染料,这对液体分散染料节能减排印染技术进步起到了促进和推动作用。

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