紫外线吸收剂上染涤纶的动力学和热力学研究  

Kinetics and thermodynamics of UV-absorbers taken up to polyester

作　　者：陈维国[1,2] 戴瑾瑾[1] 王晓芳[2] 方颂[2] 孟照成[2] 

机构地区：[1]东华大学国家染整工程技术研究中心,上海201620 [2]浙江理工大学先进纺织材料与制备技术教育部重点实验室,浙江杭州310018

出　　处：《纺织学报》2010年第10期75-81,共7页Journal of Textile Research

基　　金：长江学者和创新团队发展计划项目(IRT0654);浙江省自然科学基金资助项目(Y4090227)

摘　　要：为揭示紫外线吸收剂上染涤纶纤维的规律,选取3只苯并三唑类紫外线吸收剂UV-A1、UV-A2和UV-A3,采用高温高压法使之上染涤纶织物,用DMF萃取法测定上染量,并推算出紫外线吸收剂对涤纶纤维上染的动力学和热力学参数。通过比较3只紫外线吸收剂的各项动力学和热力学参数发现:分子结构较简单、分子体积较小的UV-A1与另外2只紫外线吸收剂相比,上染速率较高,扩散系数较大,半染时间较短,平衡吸附量也明显高于UV-A2和UV-A3,说明UV-A1更易上染并扩散进入涤纶纤维;UV-A1对涤纶有更大的上染亲和力,其上染过程的热变和熵变也比UV-A2和UV-A3更大,说明UV-A1脱离水相向纤维相转移的趋势更大。In order to reveal the regularity of UV-absorbers taken up to PET fibers,three benzotriazole type UV-absorbers（UV-A1,UV-A2 and UV-A3） were dyed onto PET fabrics with high temperature and high pressure dyeing process.The uptakes of three UV-absorbers were determined through extraction with DMF.The thermodynamics and kinetics parameters of the three UV-absorbers were measured and calculated.Through comparison of their thermodynamics and kinetics parameters,it was found that UV-A1 with simpler molecular structure and smaller molecular volume had greater equilibrium adsorption,higher dyeing rate and diffusion coefficient,shorter time of half dyeing when compared with UV-A2 and UV-A3.It is implied that UV-A1 was much easier to take up and penetrate into PET fibers,had better affinity to the fiber,greater heat and entropy change during dyeing and a stronger trend of leaving for the PET fibers from the dyeing bath.

关 键 词：紫外线吸收剂 上染 涤纶 动力学 热力学 

分 类 号：TS195.2[轻工技术与工程—纺织化学与染整工程]