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 Buffulo 该项目旨在创建具有亚纳米 (1 nm) 尺寸孔的多孔膜，这些孔沿同一方向排列、直径均匀，并且具有前所未有的高孔密度。在该项目中，将以更大（多克）的量制备一系列环状分子。人们发现这些环状分子牢固地堆积成含有长内孔的管状结构。一个主要目标是实现将相应的管状结构平行堆积成大面积或膜。这种膜含有直径均匀的亚纳米孔和前所未有的高孔密度，可以提供下一代纳米多孔材料。这些膜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主要挑战：将水分子与大多数其他离子分离。如果成功，这项研究可能会为海水淡化和污水净化提供新技术，从而产生重大的社会、经济和环境影响。这项工作的总体目标是通过垂直排列纳米管组件来制造大面积膜，并利用这种膜实现分子和离子的实际分离。中心假设是刚性大环化合物的纳米管组装体倾向于平行堆积并且可以排列成散装材料。这项研究的基本原理是，一旦阐明了管状组件排列的因素，通过合成修饰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型传质特性。该 PI 提议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。该团队建议通过开发有关有机纳米孔及其高级组件科学的讲座材料和演示来建立一个重点突出且可持续的外展项目，PI 及其研究生将使用这些材料和演示来参与布法罗地区现有的外展项目，该项目涵盖当地学区的幼儿园至 12 年级。