UNS:Nanoporous Membranes Based on Uniform Sub-Nanometer Pores

UNS：基于均匀亚纳米孔的纳米多孔膜

• 批准号: 1512164
• 负责人: Bing Gong
• 金额: $ 30万
• 依托单位: SUNY at Buffalo
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-06-15 至 2019-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1512164&HistoricalAwards=false
• 关键词: UNS; Nanoporous; Membranes; Based; Uniform

1512164GongSUNY at BuffuloThis project aims to create porous membranes having sub-nanometer ( 1 nm) sized pores that are aligned along the same direction, have a uniform diameter, and pack in unprecedentedly high pore densities. In this project, one series of ring-like molecules will be prepared in larger (multi-gram) quantities. These cyclic molecules have been found to strongly stack into tube-like structures containing long inner pores. A major objective will be to realize the parallel packing of the corresponding tube-like structures into large-area or membranes. Such a membrane, which contains sub-nanometer pores of a uniform diameters and unprecedentedly high pore density, may offer the next-generation nanoporous materials. These membranes, with their extremely densely packed pores of sub-nanomer sizes, will then be employed to address to a major challenges in separation science: the separation of water molecules from most other ions. If successful, this research may provide a new technology for the desalination of sea water and the purification of polluted water, resulting in major social, economical, and environmental impacts. The overall goal of this work is to fabricate large-area membranes by homeotropically aligning nanotubular assemblies, and to realize practically useful separation of molecules and ions using such membranes. The central hypothesis is that nantoubular assemblies of rigid macrocycles tend to pack parallel and can be aligned into bulk materials. The rationale for this research is that, once the factors responsible for the alignment of tubular assemblies are elucidated, precise control of the structure of nanopores - which is made possible by synthetically modifying rigid macrocycles will enable the revelation of novel mass-transporting properties of sub-nm pores packed in the bulk phase. The PI proposes to test the central hypothesis by pursuing three specific aims: (1) To design, synthesize and assemble one class of macrocyclic building blocks having an aromatic, tetraurea backbone and an inner cavity of ~5Å across; (2) to fabricate membranes consisting of homeotropically aligned arrays of hydrophilic sub-nm pores; (3) to start to explore the rejection of most ions from aqueous solution using the fabricated membranes. The team proposes to build a focused and sustainable outreach program by developing lecture materials and demonstrations on the science of organic nanopores and their higher assemblies, which will be used by the PI and his graduate students to participate in an existing outreach program in the Buffalo area that spans grades kindergarten through the 12th in local school districts.

1512164GongSUNY at Buffalo 该项目旨在制造具有亚纳米（1 nm）大小的孔的多孔膜，这些孔沿同一方向排列，具有均匀的直径，并以前所未有的高孔密度填充。在该项目中，一系列环形孔。人们发现，这些环状分子可以牢固地堆积成含有长内孔的管状结构。实现将相应的管状结构平行堆积成大面积或膜，这种膜具有均匀的直径和前所未有的高孔密度，可以提供下一代纳米多孔材料。具有极其密集的亚纳米尺寸孔隙，将用于解决分离科学中的重大挑战：将水分子与大多数其他离子分离。如果成功，这项研究可能会为水分子的分离提供一种新技术。这项工作的总体目标是通过垂直排列的纳米管组件制造大面积的膜，并实现分子和物质的实际分离。使用这种膜的中心假设是，刚性大环的纳米管组装体倾向于平行堆积并且可以排列成块状材料。阐明了管状组件排列的精确控制——通过合成改性刚性大环化合物实现的纳米孔结构的精确控制将能够揭示填充在本体相中的亚纳米孔的新颖的质量传输特性。通过追求三个具体目标来检验中心假设：（1）设计、合成和组装一类具有芳香族四脲骨架和约 5Å 内腔的大环结构单元； (2) 制造由亲水性亚纳米孔垂直排列阵列组成的膜；(3) 开始探索使用所制造的膜去除水溶液中的大多数离子。开发有关有机纳米孔及其高级组装科学的讲座材料和演示，首席研究员和他的研究生将使用这些材料和演示来参加布法罗地区现有的外展项目，该项目涵盖幼儿园到年级当地学区第12名。