β-环糊精与分散染料的包合及其对染色性能的影响

【作者】 刘夺奎；

【导师】 董振礼；

【作者基本信息】 天津工业大学 ， 纺织化学与染整工程， 2004， 硕士

【摘要】 本文通过β-环糊精对分散染料上染聚酯超细纤维染色性能的影响，来探讨β-环糊精作为分散染料上染聚酯超细纤维匀染剂的可行性。 我们采用了两种制备包合物的方法—水／溶剂共混法和改变pH值法，并对影响包结率的因素进行了探讨。通过正交实验，制定了最佳工艺方案，使用方差分析，讨论了各因素对包结率影响的显著性高低。通过包合物的外观、DSC曲线、紫外可见光谱、溶解度、稳定性、以及吸附百分率等多种手段对包合物进行了鉴定，结果都证明了包合物的存在。 通过测定吸附百分率曲线、移染率(界面迁移和高温移染)、染深性能和相容性来研究β-环糊精对分散染料上染聚酯超细纤维染色性能的影响，并研究了吸附等温线的变化。结果发现，对一些能够和β-环糊精形成包合物的染料，β-环糊精的加入可以改变其染色性能和低温吸附等温线。 在β-环糊精包合染料的基础上，探讨了环糊精包合客体分子的机理，认为包合物的形成主要取决于环糊精和客体分子的分子结构以及两者作用力的大小。我们采用了英国剑桥的CS-Chemoffice化学软件对染料分子的空间结构进行了模拟，测量了分子的空间尺寸。结果是：环糊精空腔大小与客体分子或其某些基团的大小越相近，越容易包合，且两者之间作用力的大小影响包合物的稳定性。在环糊精和客体分子之间的作用力中，疏水键是包合过程的主要作用力。 β-环糊精可以作为一些分散染料上染聚酯超细纤维的匀染剂，是一种新型的、价廉的、绿色匀染剂。更多还原

【Abstract】 In the paper, the feasibility of β-cyclodextrin as level-dyeing agent in dyeing of PET microfiber with disperse dye was studied.β-Cyclodextrin-C.I.Disperse Yellow 23 inclusion complex was obtained by blending water with acetone and changing pH value of working bath. During the preparation of inclusion complex, the factors affecting the ratio of encapsulation were studied. The optimum procedure was formulated by orthogonal experiment with four levels and four factors. We discussed the influence of different factors on the ratio of encapsulation by analysis of variables. The inclusion complex of β-cyclodextrin-C.I.Disperse Yellow 23 was identified by different ways such as its appearance, DSC, UV spectrum, solubility in water, and dyeing rate onto PET microfiber.The influence of P-cyclodextrin on dyeing performance of PET microfiber with disperse dye was studied through the measure of absorption rate, migration percent, building-up and compatibility of dyes. The changing of absorption isotherm by adding P-cyclodextrin was also discussed. As a result, the addition of p-cyclodextrin could change dyeing performance and absorption isotherm of some dyes which could be included into p-cyclodextrin’s hydrophobic core.The inclusion mechanism of guest molecules into cyclodextrins was discussed based on the study of inclusion between P-cyclodextrin and dyes. The conclusion was that the form of inclusion complex was dependent on both molecular structures of cyclodextrins and guests and the strength between them. We simulated the spacial structure of dyes and β-cyclodextrin with CS-Chemoffice chemical software. Meanwhile, we measured the size of dye and P-cyclodextrin. The inclusion complex was formed easily when the sizes of guest molecule or its groups were similar with that of cyclodextrins’ core. The stability of inclusion complex was influenced by the strength between cyclodextrins and guest molecule. Hydrophobic bond was main impetus of inclusion process.β-Cyclodextrin which is an inexpensive, "green" and environmental friendly chemical, is an effective level-dyeing agent in dyeing of PET microfiber with some disperse dyes.更多还原