Experimental and Modeling Studies of the TIPS Membrane Formation Process

TIPS 膜形成过程的实验和建模研究

• 批准号: 9713322
• 负责人: Robert Sani
• 金额: $ 31万
• 依托单位: University of Colorado at Boulder
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-09-01 至 2002-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9713322&HistoricalAwards=false
• 关键词: Experimental; Modeling; Studies; TIPS; Membrane

Abstract Proposal No: 9713322 Proposal Type: Investigator Initiated Principal Investigator: William B. Krantz Affiliation: University of Colorado at Boulder This grant is awarded through the Separations and Purification Program sub-element of the Interfacial, Transport and Separations Program of the Chemical and Transport Systems Division. The principal investigator is Dr. William Krantz of the University of Colorado. The research involves fundamental studies of the thermally induced phase separation process (TIPS) for membrane formation. The process involves cooling a polymer solution to effect phase separation and the formation of a dense polymer phase which is then recovered and becomes the membrane. The investigators propose to conduct their studies on fluorinated polymers due to the potentially wide applicability of these membranes and the lack of fundamental knowledge on optimal membrane fabrication. A novel aspect of the research is the use of acoustic time-domain reflectometry (ATDR) to characterize the thermally induced phase transitions and obtain polymer phase thickness as a function of time. ATDR can also provide information on membrane microstructure and is complementary to information obtained through electron micrography. Finally, the investigators seek to use analogies to alloy solidification theories to model the TIPS process. The research will provide a better understanding of membranes formed through thermally induced phase separation processes. This should have a direct impact on membrane design and casting procedures to fine-tune pore distributions and membrane thickness. Application lie in a variety of membrane separation technologies adapted to the chemical, petroleum and pharmaceutical industries.

摘要 提案编号： 9713322 提案类型： 研究者发起的主要研究者： 威廉B。克兰茨所属机构： 科罗拉多大学博尔德分校 该补助金通过化学和运输系统司界面，运输和分离计划的分离和纯化计划子要素授予。首席研究员是科罗拉多大学的威廉·克兰茨博士。本研究涉及热致相分离过程（TIPS）成膜的基础研究。该方法包括冷却聚合物溶液以实现相分离并形成致密聚合物相，然后将其回收并成为膜。研究人员建议对氟化聚合物进行研究，因为这些膜具有潜在的广泛适用性，并且缺乏最佳膜制造的基础知识。一个新的方面的研究是使用声学时域反射仪（ATDR）的热诱导相变的特征，并获得聚合物相厚度作为时间的函数。ATDR还可以提供关于膜微观结构的信息，并且与通过电子显微术获得的信息互补。最后，研究人员试图使用合金凝固理论的类比来模拟TIPS过程。 这项研究将提供一个更好的理解膜形成通过热致相分离过程。这应该 直接影响膜的设计和铸造程序， 微调孔分布和膜厚度。适用于各种膜分离技术，适用于化学、石油和制药工业。