Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
Department of Urban Engineering, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
Small. 2020 Jun;16(23):e2001721. doi: 10.1002/smll.202001721. Epub 2020 May 4.
To obtain high quality of drinking water free from biocontaminants is especially important issue. A new strategy employing smectic liquid-crystalline ionic membranes exhibiting 2D structures of layered nanochannels for water treatment is proposed for efficient virus removal and sufficient water flux. The smectic A (SmA) liquid-crystalline membranes obtained by in situ polymerization of an ionic mesogenic monomer are examined for removal of three distinct viruses with small size: Qβ bacteriophage, MS2 bacteriophage, and Aichi virus. The semi-bilayer structure of the SmA significantly obstructs the virus penetration with an average log reduction value of 7.3 log or the equivalent of reducing 18 million viruses down to 1. Furthermore, the layered nanochannels of the SmA liquid crystal allow efficient water permeation compared to other types of liquid-crystalline membrane consisting of nanopores.
获得高质量、不含生物污染物的饮用水是一个特别重要的问题。本研究提出了一种新策略，即采用具有二维层状纳米通道结构的近晶相液晶离子膜来处理水，以实现高效去除病毒和充足水通量。通过离子介晶单体的原位聚合得到的近晶 A 相（SmA）液晶膜，用于去除三种不同的小尺寸病毒：Qβ噬菌体、MS2 噬菌体和 Aichi 病毒。SmA 的半双层结构显著阻碍了病毒的渗透，平均对数减少值为 7.3 对数，相当于将 1800 万病毒减少到 1 以下。此外，与由纳米孔组成的其他类型的液晶膜相比，SmA 液晶的层状纳米通道允许水高效渗透。
