(SGER) Small Grant for Exploratory Research on Mixed Matrix Reactively Intercalated Composite Membranes

(SGER) 混合基质反应插层复合膜探索性研究小额资助

• 批准号: 9706621
• 负责人: William Koros
• 金额: $ 5万
• 依托单位: University of Texas at Austin
• 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: 1997-04-15 至 1998-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9706621&HistoricalAwards=false
• 关键词: SGER; Small; Grant; Exploratory; Research

Abstract Proposal No: 9706621 Proposal Type: SGER Principal Investigator: William J. Koros Affiliation: University of Texas at Austin 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 Koros of the University of Texas at Austin. The objective of the proposal is to develop composite membranes containing a molecular sieving material ( zeolites) embedded in polymeric media. While zeolites have the shape and size selectivity potential to separate gases, they are inorganic materials and hard to fabricate into flexible membranes. Incorporating them into polymeric materials allows fabrication of various membrane configurations including the hollow-fiber configuration the PI proposes to use. However, a new problem comes in, as defects and voids between the zeolite crystallites and the polymer matrix lead to species bypass of the selective medium. The PI proposes to repair these membranes by caulking these voids by carrying out a post membrane fabrication treatment, where a monomer is allowed to diffuse into the voids and then a polymer is generated to seal the voids. It is hypothesized that once these voids are caulked, the only route for gas transport is through the zeolite channels, thereby imposing the required selectivity. The project entails high risk, but the potential benefits are tremendous. Composite membranes containing zeolites have tremendous potential in gas separations. There is a need for flexible zeolite based membranes. The PI's work on incorporating zeolites in polymer matrices and modifying the membrane so that transport occurs only in the zeolite micropores is interesting both from a scientific and an industrial perspective. The question of membrane optimization through post-treatment is an important one.

摘要 提案编号： 9706621提案类型：SGER主要研究者：William J. Koros附属机构： 德克萨斯大学奥斯汀分校 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。 首席研究员是德克萨斯大学奥斯汀分校的William Koros博士。 该提案的目的是开发含有嵌入聚合物介质中的分子筛材料（沸石）的复合膜。 虽然沸石具有分离气体的形状和尺寸选择性潜力，但它们是无机材料并且难以制造成柔性膜。 将它们混合成聚合物材料允许制造各种膜配置，包括PI建议使用的中空纤维配置。 然而，一个新的问题来了，作为沸石微晶和聚合物基质之间的缺陷和空隙导致物种旁路的选择性介质。 PI建议通过进行膜制造后处理来填塞这些空隙来修复这些膜，其中允许单体扩散到空隙中，然后生成聚合物来密封空隙。 假设一旦这些空隙被填塞，气体传输的唯一途径是通过沸石通道，从而施加所需的选择性。 这个项目风险很大，但潜在的利益是巨大的。 含沸石的复合膜在气体分离中具有巨大的潜力。 需要柔性沸石基膜。 PI关于将沸石纳入聚合物基质并修改膜以使运输仅发生在沸石微孔中的工作从科学和工业的角度来看都是有趣的。 通过后处理优化膜的问题是一个重要的问题。