摘要
以Flory-Huggins理论为基础,对PES-PG-NMP-H2O(聚醚砜-丙二醇-N-甲基-2-吡咯烷酮-水)四元制膜液体系的相图进行了计算.利用三元相图考察H2O和PG对液-液相分离的影响.在三元理论的基础上提出了低分子量添加剂的四元改性Flory-Huggins理论,并提出了一种获得四元相图的方法.利用四元相图能较好地描述四元体系,利用改性的四元理论。
A numerical method for the calculation of the binodal of liquid liquid phase separation in a quaternary system is described. The modified Flory Huggins theory for three component and four component systems are used, and the effects of water and additives on the ternary systems are discussed. The quaternary phase diagram of the polyethersulfone/1,2 propanediol/N methyl 2 pyrrolidone/water system is shown in a tetrahedron. The effects of interaction parameters are also discussed.
出处
《膜科学与技术》
CAS
CSCD
1997年第1期63-68,共6页
Membrane Science and Technology
基金
国家"八五"攻关项目
关键词
相图计算
分离
四元相图
聚醚砜风
液液分离
calculation of phase diagram liquid liquid phase separation quaternary phase diagram