Journal
NATURE COMMUNICATIONS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-04604-y
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Funding
- National Science Foundation CAREER grant [CBET-1552571]
- NSF MRI program [PHY-1229408]
- NSF [ACI-1053575, TG-MCB140029]
- Institute of Collaborative Biotechnologies from the U.S. Army Research Office [W911NF-09-0001]
- [CBET-1705278]
- [DMR-1709522]
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Synthetic polymer membranes, critical to diverse energy-efficient separations, are subject to permeability-selectivity trade-offs that decrease their overall efficacy. These trade-offs are due to structural variations (e.g., broad pore size distributions) in both nonporous membranes used for Angstrom-scale separations and porous membranes used for nano to micron-scale separations. Biological membranes utilize well-defined Angstrom-scale pores to provide exceptional transport properties and can be used as inspiration to overcome this trade-off. Here, we present a comprehensive demonstration of such a bioinspired approach based on pillar[5] arene artificial water channels, resulting in artificial water channel-based block copolymer membranes. These membranes have a sharp selectivity profile with a molecular weight cutoff of similar to 500 Da, a size range challenging to achieve with current membranes, while achieving a large improvement in permeability (similar to 65 Lm(-2) h(-1) bar(-1) compared with 4-7 L m(-2) h(-1) bar(-1)) over similarly rated commercial membranes.
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