Studies of Asymmetric Membrane Formation

这是一个研究聚合物膜形成的相 反演技术，将重点放在发展 构造形成的定量模型 流程. 聚合物/溶剂/非溶剂模型 系统将被用来研究玻璃的作用 相变、液-液相分离和结晶 在膜沉淀之前和之后。 膜形态 也将使用扫描电子显微镜进行研究。 结合传质实验结果， 这些将根据为以下目的开发的模型进行分析： 非溶剂-溶剂交换过程。 从这些 研究将直接应用于膜领域， 处理，并且还将在许多其他应用中找到应用。 涉及聚合物相重要工艺过程 非平衡淬火条件下的相变。

This is a study of polymer membrane formation by the phase inversion technique to which will focus on the development of quantitative models to describe the structure forming processes. A number of model polymer/solvent/nonsolvent systems will be used to investigate the role of glass transition,liquid-liquid phase separation, and crystallization prior to and following film precipitation. Film morphology will also be studied using scanning electron microscopy. Together with results from the mass transfer experiments, these will be analyzed in terms of models developed for the nonsolvent-solvent exchange process. Results from these studies will have direct application in the field of membrane processing and will also find application in a number of other important technological processes which involve polymer phase transformation under nonequilibrium quench conditions.