PLA纤维的染色动力学和热力学研究  

The Kinetics and Thermodynamics Studies of Disperse Dye Dyeing on PLA Fibers

作　　者：许建华[1] 关艳锋[1] 郑今欢[1] 

机构地区：[1]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,杭州310018

出　　处：《浙江理工大学学报（自然科学版）》2008年第6期644-648,666,共6页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：浙江省科技厅重大攻关项目资助(2005C11028-03)

摘　　要：用分散蓝RSE研究了PLA纤维的染色动力学和热力学,绘制了上染速率曲线和吸附等温线。结果表明:95℃时分散蓝RSE对PLA纤维的平衡吸附量、染色速率常数和扩散系数均大于85℃时;85℃时,染料上染PLA纤维的半染时间比染涤纶要长,即达到吸附平衡需要更长的时间;分散蓝RSE上染PLA纤维的吸附等温线不完全服从Nernst分配型,而是Langmuir与Nernst的复合型;随着温度升高,Nernst型分配系数KN增大,Langmuir定位吸附饱和值[S]降低。Purified Disperse Blue RSE is applied to investigate the dyeing kinetics and thermodynamics for PLA fiber. The results show that the equilibrium adsorption capacity, dyeing rate constant and diffusion coefficients of Disperse Blue RSE to PLA fiber at 95℃ are higher than at 85℃ ; The half-dyeing time of Disperse Blue RSE to PLA fiber at 95℃ is longer than PET fibres, namely its equilibrium adsorption needs a longer time ; The adsorption isotherm of Disperse Blue RSE to PLA fiber does not entirely accord with Nernst distribution mechanism, it accords with the combination of Nernst distribution and Langmuir adsorption; The partition coefficient KN of Nernst is increased as the temperature rises, but the Langmuir adsorption saturation value[S] reduced as the temperature rises.

关 键 词：聚乳酸纤维 染色动力学 染色热力学 上染速率 吸附等温线 

分 类 号：TS190.1[轻工技术与工程—纺织化学与染整工程]