硫酸铯/聚乙二醇双水相体系在29815K的相平衡  

Phase diagram of the PEG (poly(ethylene glycol))-Cs_2SO_4-H_2O aqueous two-phase system at 298.15 K

作　　者：张晓蕾[1] 胡满成[1] 翟全国[1] 刘志宏[1] 夏树屏[2] 高世扬[1] 

机构地区：[1]陕西师范大学化学与材料科学学院,陕西西安710062 [2]中国科学院盐湖研究所西安二部,陕西西安710043

出　　处：《化学研究与应用》2004年第4期507-509,共3页Chemical Research and Application

基　　金：国家自然科学基金 ( 2 0 1710 3 2 )资助项目

摘　　要：Liquid-liquid equilibrium of the poly （ethylene glycol）（PEG）-Cs2SO4-H2O aqueous two-phase system,with PEG of molecular weigth 1000,4000 and 10000,was measured at 298.15 K.The binodal curves were obtained using a four-parameter equation,and the tie lines were satisfactorily described using the Othmer-Tobias and Bancroft equations.These equations were used to develop a mathematical model for interpretation of the equilibrium data of these aqueous two-phase systems（ATPS）.It was found that an increase in the molecular weight of the PEG produced a displacement of the binodal curve toward the origin and decreased the-phase zone.Liquid-liquid equilibrium of the poly (ethylene glycol)(PEG)-Cs_2SO_4-H_2O aqueous two-phase system,with PEG of molecular weigth 1000,4000 and 10000,was measured at 298.15 K.The binodal curves were obtained using a four-parameter equation,and the tie lines were satisfactorily described using the Othmer-Tobias and Bancroft equations.These equations were used to develop a mathematical model for interpretation of the equilibrium data of these aqueous two-phase systems(ATPS).It was found that an increase in the molecular weight of the PEG produced a displacement of the binodal curve toward the origin and decreased the-phase zone.

关 键 词：硫酸铯 聚乙二醇 双水相体系 相平衡 

分 类 号：O642.4[理学—物理化学]