分散染料在超临界CO_2与聚酯纤维间平衡浓度分配关系  

Equilibrium Concentration Partition of Disperse Dyes between Supercritical CO_2 and Polyester Fibres

作　　者：李志义[1] 孟庭宇[1] 刘学武[1] 王晓娟[1] 胡大鹏[1] 

机构地区：[1]大连理工大学流体与粉体工程研究设计所,辽宁大连116012

出　　处：《高校化学工程学报》2007年第4期700-704,共5页Journal of Chemical Engineering of Chinese Universities

基　　金：国家自然科学基金(20277004)

摘　　要：为了深入理解“分散染料-超临界CO2^-聚酯纤维”三元体系相平衡特性。建立了三元相平衡高压实验装置,在温度353k、373和393K,压力17-32MPa条件下,对分散橙25在超临界CO2与聚酯纤维（涤纶）之间的平衡浓度分配系数进行了测定。结果表明：分散染料在气-固两相间的分配系数随着操作压力的升高而减小,随着操作温度的升高而增大;操作压力和操作温度是影响超临界流体染色过程三元体系相平衡的重要因素;该实验方法是确定染料等固体小分子在气-固两相间分配关系的一种切实有效的方法。The phase equilibrium characteristic of a ternary system consisting of the disperse dye / supercritical CO2/ polyester fibres was studied. During which, a high pressure experimental apparatus for determining ternary phase equilibrium was set up, and by using it, the equilibrium concentration partition coefficients of disperse orange 25 between supereritical CO2 and polyester fibres （terylene） at the temperature of 353. 373 and 393 K and under the pressures ranging from 17 MPa to 32 MPa were determined respectively. The results show that the operating pressure and operating temperature are two main factors affecting the equilibrium of the above ternary phase system and therefore affecting the supercritical fluid dyeing. The partition coefficient of disperse dyes between gas phase and solid phase decreases with the increase of operating pressure and increases with the increase of operating temperature. The results also show that the employed experimental method can be used effectively to determine the partition coefficient between gas phase and solid phase such as the disperse dyes and other solids with small molecules.

关 键 词：分配系数 超临界CO2 分散橙25 聚酯纤维 

分 类 号：O642.42[理学—物理化学] TQ613.24[理学—化学]