Development of Membrane Materials Using Ion Beam Irradiation of Aromatic Polymers

建议编号：CTS-9975452建议类型：调查者发起主要调查者：玛丽亚·R·科尔曼隶属关系：托莱多大学利用离子束辐照芳香族聚酰亚胺开发膜材料离子束辐照作为一种系统地改变聚合物膜的气体传输性能的方法正在进行研究，以便开发在恶劣环境中应用的膜系统。大量的研究表明，随着离子注量的增加，聚合物的化学结构和微观结构以及性能都发生了显着的变化。该研究小组的概念验证研究表明，聚酰亚胺膜的H+辐照导致相对于原始膜的渗透性和渗透选择性的综合增加。系统地研究了离子束辐照对一系列聚酰亚胺的微观结构、化学结构和气体传输性能的影响。本研究的结果将阐明聚酰亚胺微结构演变的机理，以及这种微结构与辐照聚合物气体传输性能之间的关系。

AbstractProposal number: CTS-9975452Proposal type: Investigator InitiatedPrincipal investigator: Maria R. ColemanAffiliation: University of ToledoDevelopment of Membrane Materials Using Ion Beam Irradiation of Aromatic PolyimidesIon-beam irradiation is being investigated as a method to modify systematically the gas-transport properties of polymeric membranes in order to develop membrane systems for applications in harsh environments. Numerous studies indicate that there is a significant evolution in the chemical structure and microstructure as well as in the properties of polymers following exposure to irradiating ions at increasing ion fluences. Proof-of-concept studies by this research group indicate that H+ irradiation of polyimide membranes results in combined increases in both permeability and permselectivity relative to the virgin membranes. A systematic investigation of the impact of ion-beam irradiation on the microstructure, chemical structure, and gas transport properties of a series of polyimides will be performed. The results of this study will clarify the mechanism of microstructural evolution in the polyimides and the relationship between this microstructure and the gas-transport properties of the irradiated polymers.