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; 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.

Buffulothis Project的1512164Gongsuny旨在创建具有亚纳米（1 nm）大小的孔的多孔膜，沿着同一方向对齐，直径均匀，并以前所未有的高毛孔包装。在这个项目中，将以较大（多克）数量制备一系列环形分子。已经发现这些环状分子强烈堆放到包含长内孔的管状结构中。一个主要的目标是将相应的管状结构的平行堆积到大面积或膜中。这种膜含有均匀直径且前所未有的高孔密度的亚纳米孔，可能会提供下一代纳米多孔材料。这些膜及其极为荒芜的亚纳米尺寸毛孔，然后将被用来解决分离科学的主要挑战：从大多数其他离子中分离水分子。如果成功，这项研究可能会为海水脱盐和污染水的纯化提供新技术，从而产生重大的社会，经济和环境影响。这项工作的总体目的是通过同型对准纳米管组件来制造大面积膜，并使用此类膜实际上实现分子和离子实际上有用的分离。中心假设是刚性大环的nantoubular组件倾向于堆积平行，并且可以排列成散装材料。这项研究的基本原理是，一旦负责管状组件对齐的因素被阐明，精确控制了纳米孔的结构 - 通过合成修改刚性大环的合成型巨大的巨型循环，这将使您可以启示包装在Bulk bulk相中的小型NM孔的新型质量交易特性。 PI通过追求三个具体目标来检验中心假设的PI提议：（1）设计，合成和组装一类具有芳香族，四尿主链的大环的构件，并且跨越了〜5Å的内部空腔； （2）用于制造由亲水性亚NM孔的同型对齐阵列组成的膜； （3）开始使用制造的膜探索从水溶液中对大多数离子的排斥。团队的提议通过开发有关有机纳米孔及其上等集会科学的演讲材料和演示来建立一个集中和可持续的外展计划，PI及其研究生将使用该计划在Buffalo地区的现有外展计划中使用，该计划将跨越当地学区的幼儿园跨越幼儿园。