分散蓝354和分散彩蓝QS-B匀染性的影响因素分析

Analysis of influencing factors on levelness of Disperse Blue 354 and Disperse Blue QS-B

分散蓝354和分散彩蓝QS-B对涤纶进行染色时易产生染色不匀现象;为探究这2种染料匀染性差的原因,以匀染性能优良的分散蓝60为参照,对影响染料匀染性的因素进行分析,评价染料的匀染性,测试高温分散稳定性、透染性、动力学及热力学性能,模拟计算分子晶胞参数,并测试移染性。结果表明:分散蓝60的分子体积小、半染时间短,对涤纶进行染色时表现出良好的扩散性与移染性,使得匀染性能优良;分散蓝354分子平面性较好,对涤纶的标准亲和力较大;分散彩蓝QS-B分子体积较大,扩散性能较差,使得两者匀染性不佳。该研究结果可为提升分散染料的匀染性提供参考。

Disperse Blue 354 and Disperse Blue QS-B are prone to uneven dyeing when used to dye polyester fibers.In order to explore the reasons for the poor levelness of these two dyes,we took Disperse Blue 60 with excellent levelness as reference,analyzing the factors affecting levelness from the dyes themselves.Specifically,we evaluated the levelness of the dyes,tested the high-temperature dispersion stability,dye penetration,kinetics and thermodynamic properties,simulated and calculated the molecular cell parameters,and tested the dye transfer.It is shown that,Disperse Blue 60 has a small molecular volume and a short half-dyeing time.When dyeing polyester,it shows good diffusivity and migration,which makes the level dyeing performance excellent.Disperse blue 354 has good planarity and high standard affinity for polyester,and Disperse Blue QS-B has a large molecular volume and poor diffusion performance,which makes their levelness poor.The conclusion of this study can provide reference for improving the levelness of disperse dyes.