分散染料耐碱性能评定方法的研究  

Research on alkaline resistance performance evaluation method of disperse dyes

作　　者：郝芬 荆丽丽 杜金梅 蒋阳 许长海[1,3] HAO Fen;JING Lili;DU Jinmei;JIANG Yang;XU Changhai(Key Laboratory of Eco-textiles of Ministry of Education,Jiangnan University,Wuxi 214122,China;Penglai Jiaxin Dye ChemicalCo.,Ltd.,Penglai 265600,China;College of Textile&Clothing,Qingdao University,Qingdao 266071,China)

机构地区：[1]江南大学生态纺织教育部重点实验室,江苏无锡214122 [2]蓬莱嘉信染料化工股份有限公司,山东蓬莱265600 [3]青岛大学纺织服装学院,青岛266071

出　　处：《丝绸》2022年第1期64-68,共5页Journal of Silk

基　　金：国家重点研发计划资助项目(2017YFB0309700)。

摘　　要：分散染料碱性染色工艺已经获得应用和推广,为了提供一种简单易行的评定分散染料耐碱性能的方法,本文探讨了高温高压染色条件下分散染料的耐碱性能。结果表明,升温速率2℃/min,染色温度130℃,保温时间30 min,分别采用常规弱酸性条件(pH值约为4.8),2 g/L的CH_(3)COONa、2 g/L的Na_(2)CO_(3)和2 g/L的NaOH的染浴上染涤纶织物,依据碱性条件与常规弱酸性条件染色织物的色差ΔE_(CMC),可有效鉴定出不同分散染料的耐碱性,并根据等级划分将分散染料分为高耐碱性(优)、一般耐碱性(良)、弱耐碱性(中)、不耐碱性(差)四级。Conventionally,the pretreatment process of polyester fabric is completed in alkaline condition,but polyester fabric dyeing process is usually carried out in acidic condition.Therefore,multiple washing and acid pickling before dyeing are required to remove the residual alkali agent on the fabric,otherwise it would easily cause pH fluctuation of dyeing bath and affect the dyeing quality of fabric.In addition,due to the low solubility of the oligomer precipitated in acid bath,the dyeing fabric and dyeing equipment will be affected.The above problems can be solved to a certain extent by using alkaline dyeing,which essentially depends on the alkali resistance of disperse dyes.However,it is difficult for dyeing and finishing workers to choose targeted dyes for alkaline dyeing because of the undetermined relationship between the dye structure and its alkali resistance,as well as the lack of alkali resistance evaluation methods for disperse dyes.To address the practical problems of alkaline dyeing of polyester fabric,we explored the impact of dyeing process conditions,types and dosages of alkali agents on the alkali resistance performance of disperse dyes and determined a simple and rapid evaluation method of the alkali resistance performance of disperse dyes with the experimental results as the analysis basis.Firstly,we investigated the factors affecting the alkali resistance of disperse dyes under high-temperature and high-pressure conditions and chose the optimal process conditions for evaluating the alkali resistance performance of disperse dyes.K/S value was used as a measurement standard to explore the impact of temperature,heat preservation time and heating rate on the dyeing effect of polyester fabric.It was found that the K/S values of polyester fabrics were stable after dyeing at 130℃for 30 minutes with a heating rate of 2℃/min with a dye concentration of 1%(o.w.f)and this process conditions met the requirements of alkali resistance performance test.Secondly,we discussed the stability of disperse dyes in di

关 键 词：分散染料 耐碱性 涤纶织物 染色 评定 高温高压 

分 类 号：TS190.9[轻工技术与工程—纺织化学与染整工程]