摘要
采用L-S相转化法制备非对称型分离膜的结构与性能取决于其制膜过程的热力学及动力学因素.讨论了聚合物分子量及浓度、溶剂及溶剂化作用、添加剂、铸膜液温度等热力学因素对铸膜液结构的影响,以及溶剂蒸发速度、凝胶速度等动力学因素对于脱溶剂速度的影响,综述了相关的热力学及动力学影响因素的表征方法.
This article defined and provided an overview of the essential affecting factors for the structure and performances of polymeric membranes with asymmectric structure prepared by L-S phase inversion process. The effect of vital thermodynamic factors, including the molecular weight and concentration of polymer, the solvent and its solvation, the additive selection, and the temperature of casting solution on the structure of casting solution; as well as the impact of critical kinetic factors, such as the solvent evaporation rate and gelation rate on the desolvation rate of the nascent membrane, were systemetically dis- cussed. The methods to charicterize the relavent thermodynamic and kinetic affecting factors were also reviewed.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2011年第1期1-11,共11页
Membrane Science and Technology
关键词
非对称膜
相转化
铸膜液结构
脱溶剂速率
热力学
动力学
asymmetric membrane
phase inversion
casting solution structure
desolvation rate
thermo-dynamics
kinetics
