3D printed polyamide membranes for desalination.

Autor: Chowdhury MR; Department of Chemical and Biomolecular Engineering, University of Connecticut, Center for Environmental Sciences and Engineering, 191 Auditorium Road, Unit 3222, Storrs, CT 06269-3222, USA., Steffes J; Department of Materials Science and Engineering, University of Connecticut, 97 North Eagleville Road, Unit 3136, Storrs, CT 06269-3136, USA., Huey BD; Department of Materials Science and Engineering, University of Connecticut, 97 North Eagleville Road, Unit 3136, Storrs, CT 06269-3136, USA., McCutcheon JR; Department of Chemical and Biomolecular Engineering, University of Connecticut, Center for Environmental Sciences and Engineering, 191 Auditorium Road, Unit 3222, Storrs, CT 06269-3222, USA. jeffrey.mccutcheon@uconn.edu.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2018 Aug 17; Vol. 361 (6403), pp. 682-686.
DOI: 10.1126/science.aar2122
Abstrakt: Polyamide thickness and roughness have been identified as critical properties that affect thin-film composite membrane performance for reverse osmosis. Conventional formation methodologies lack the ability to control these properties independently with high resolution or precision. An additive approach is presented that uses electrospraying to deposit monomers directly onto a substrate, where they react to form polyamide. The small droplet size coupled with low monomer concentrations result in polyamide films that are smoother and thinner than conventional polyamides, while the additive nature of the approach allows for control of thickness and roughness. Polyamide films are formed with a thickness that is controllable down to 4-nanometer increments and a roughness as low as 2 nanometers while still exhibiting good permselectivity relative to a commercial benchmarking membrane.
(Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works.)
Databáze: MEDLINE
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