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Unique selectivity trends of highly permeable PAP[5] water channel membranes
Faraday Discussions ( IF 3.3 ) Pub Date : 2018-07-12 , DOI: 10.1039/c8fd00043c Woochul Song 1, 2, 3, 4 , Yue-xiao Shen 5, 6, 7, 8 , Chao Lang 1, 2, 3, 4 , Prantik Saha 9, 10, 11, 12 , Iryna V. Zenyuk 10, 11, 12, 13 , Robert J. Hickey 2, 3, 4, 14 , Manish Kumar 1, 2, 3, 4, 15
Faraday Discussions ( IF 3.3 ) Pub Date : 2018-07-12 , DOI: 10.1039/c8fd00043c Woochul Song 1, 2, 3, 4 , Yue-xiao Shen 5, 6, 7, 8 , Chao Lang 1, 2, 3, 4 , Prantik Saha 9, 10, 11, 12 , Iryna V. Zenyuk 10, 11, 12, 13 , Robert J. Hickey 2, 3, 4, 14 , Manish Kumar 1, 2, 3, 4, 15
Affiliation
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Artificial water channels are a practical alternative to biological water channels for achieving exceptional water permeability and selectivity in a stable and scalable architecture. However, channel-based membrane fabrication faces critical barriers such as: (1) increasing pore density to achieve measurable gains in permeability while maintaining selectivity, and (2) scale-up to practical membrane sizes for applications. Recently, we proposed a technique to prepare channel-based membranes using peptide-appended pillar[5]arene (PAP[5]) artificial water channels, addressing the above challenges. These multi-layered PAP[5] membranes (ML-PAP[5]) showed significantly improved water permeability compared to commercial membranes with similar molecular weight cut-offs. However, due to the distinctive pore structure of water channels and the layer-by-layer architecture of the membrane, the separation behavior is unique and was still not fully understood. In this paper, two unique selectivity trends of ML-PAP[5] membranes are discussed from the perspectives of channel geometry, ion exclusion, and linear molecule transport.
中文翻译：
高渗透性PAP [5]水通道膜的独特选择性趋势
人造水道是生物水道的实用替代品，可在稳定且可扩展的体系结构中实现出色的透水性和选择性。然而，基于通道的膜制造面临诸如以下的关键障碍：（1）增加孔密度，以在保持选择性的同时实现可测量的渗透率增加，以及（2）扩大到实际应用的膜尺寸。最近，我们提出了一种使用肽附加支柱[5]芳烃（PAP [5]）人造水通道制备基于通道的膜的技术，从而解决了上述挑战。与具有类似分子量截留值的商业膜相比，这些多层PAP [5]膜（ML-PAP [5]）表现出显着改善的水渗透性。然而，由于水通道具有独特的孔结构和膜的逐层结构，因此分离行为是独特的，至今仍未完全了解。本文从通道几何，离子排斥和线性分子传输的角度讨论了ML-PAP [5]膜的两个独特的选择性趋势。
更新日期：2018-09-28
中文翻译：
高渗透性PAP [5]水通道膜的独特选择性趋势
人造水道是生物水道的实用替代品，可在稳定且可扩展的体系结构中实现出色的透水性和选择性。然而，基于通道的膜制造面临诸如以下的关键障碍：（1）增加孔密度，以在保持选择性的同时实现可测量的渗透率增加，以及（2）扩大到实际应用的膜尺寸。最近，我们提出了一种使用肽附加支柱[5]芳烃（PAP [5]）人造水通道制备基于通道的膜的技术，从而解决了上述挑战。与具有类似分子量截留值的商业膜相比，这些多层PAP [5]膜（ML-PAP [5]）表现出显着改善的水渗透性。然而，由于水通道具有独特的孔结构和膜的逐层结构，因此分离行为是独特的，至今仍未完全了解。本文从通道几何，离子排斥和线性分子传输的角度讨论了ML-PAP [5]膜的两个独特的选择性趋势。
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