Journal
SMALL
Volume 15, Issue 6, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201804678
Keywords
diastereomers; pillar[5]arene; pores; synthetic water nanochannels; water permeability
Categories
Funding
- PUB, Singapore's National Water Agency
- Singapore National Research Foundation [EWI 1501-IRIS-04]
- Singapore Economic Development Board
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Synthetic water channels offer great promise to replace natural aquaporins (AQPs) for making new-generation biomimetic membranes for water treatment. However, the water permeability of the current synthetic water channels is still far below that of AQPs. Here, peptide-attached (pR)-pillar[5]arene (pR-PH) channels are reported to mimic the high permeability of AQPs. It is demonstrated that the pR-PH channels with an open pore can transport water smoothly and efficiently. The pR-PH channels are competitive with AQPs in terms of water permeability and are much superior to diastereomer peptide-attached (pS)-pillar[5]arene (pS-PH) and other reported synthetic water channels. The exceptional water-transport properties of the pR-PH channels are further demonstrated in a composite polymeric membrane that incorporates the nanochannels into the top selective layer. This membrane gives a significantly improved water flux while retaining high salt rejection. The results establish a tangible foundation for developing highly efficient artificial water channel-based biomimetic membrane for water purification applications.
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