ABSTRACT
The original version of this Article contained an error in the spelling of the author Woochul Song, which was incorrectly given as Woochul C. Song. This has been corrected in both the PDF and HTML versions of the Article.
ABSTRACT
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 ~ 500 Da, a size range challenging to achieve with current membranes, while achieving a large improvement in permeability (~65 L m-2 h-1 bar-1 compared with 4-7 L m-2 h-1 bar-1) over similarly rated commercial membranes.
Subject(s)
Membranes, Artificial , Molecular Dynamics Simulation , Polymers/chemistry , Water/chemistry , Aquaporins/chemistry , Computer Simulation , Detergents/chemistry , Lipid Bilayers/chemistry , Liposomes/chemistry , Microscopy, Confocal , Microscopy, Electron, Transmission , Molecular Weight , Permeability , Porosity , Salts/chemistrySubject(s)
Bacillus anthracis/metabolism , Chemistry Techniques, Analytical/methods , Chromatography, Gas/methods , Esters/chemistry , Fatty Acids/chemistry , Agar/chemistry , Calibration , Culture Media/pharmacology , Methylation , Models, Statistical , Quality Control , Glycine max/chemistry , Spores, Bacterial/metabolism , Time FactorsABSTRACT
The TIPS derivatives of alcohols are contaminated with more or less of the diisopropyl(n-propyl)silyl derivative, which can be a major product when a bad batch of reagent is used, a large excess of reagent is used, and/or the reaction is not taken to completion.