染色促进剂对聚丁二酸丁二醇酯纤维分散染料染色动力学和热力学的影响

Effect of dyeing promoter on dyeing kinetics and thermodynamics of polybutylene succinate fiber dyeing with disperse dye

为研究聚丁二酸丁二醇酯(PBS)纤维分散染料低温染色技术,以丁二酸二乙酯为主要原料制备了低温染色促进剂,分析了染色促进剂在PBS纤维分散染料低温染色中的作用,研究了染色促进剂对PBS纤维用C.I.分散红60染料的染色动力学和热力学性能的影响。研究结果表明:C.I.分散红60染料在PBS纤维上的吸附染色动力学方程符合准二级动力学方程,相比无染色促进剂染色,在70℃含有染色促进剂染色的条件下,C.I.分散红60染料在PBS纤维上的平衡吸附量有明显提升,染色速率明显加快,半染时间显著缩短,扩散系数也显著增大;染色促进剂的加入对分散染料上染PBS纤维起到了一定的促进作用,C.I.分散红60染料对PBS纤维的染色,在有无染色促进剂时均符合能斯特型吸附等温线。

In order to develop polybutylene succinate(PBS)fiber disperse dye low-temperature dyeing technology,the role of dyeing promoters in the dyeing process was studied.Diethyl succinate was used to prepare dyeing promoter for the dyeing of PBS fiber with disperse dye.C.I.Disperse Red 60 was used to dye PBS fiber,the influence of dyeing promoter on the dyeing kinetics and thermodynamics of PBS fiber was studied,and dyeing mechanism of PBS fiber was investigated.The result showed that the dyeing kinetic equation of C.I.Disperse Red 60 on PBS fiber was in accordance with the quasi second order kinetic equation.Compared to dye without dyeing promoter,with the condition of dyeing at 70℃with dye promoter,the equilibrium adsorption capacity of C.I.Disperse Red 60 on PBS fibers was increased,and the dyeing rate significantly was faster,the half-staining time was shortened,and the diffusion coefficient was also significantly increased.The addition of dyeing promoter played a certain role in promoting the dyeing of PBS fibers with disperse dyes.With or without dyeing accelerators,the dyeing of C.I.Disperse Red 60 on PBS fiber conformed to the Nernst type adsorption isotherm.