67
IRUS Total
Downloads
  Altmetric

Neutron Reflectivity and Performance of Polyamide Nanofilms for Water Desalination

File Description SizeFormat 
Foglia et al NR RO membranes final.pdfAccepted version1.01 MBAdobe PDFView/Open
Title: Neutron Reflectivity and Performance of Polyamide Nanofilms for Water Desalination
Authors: Foglia, F
Karan, S
Nania, M
Jiang, Z
Porter, AE
Barker, R
Livingston, AG
Cabral, JT
Item Type: Journal Article
Abstract: The structure and hydration of polyamide (PA) membranes are investigated with a combination of neutron and X-ray reflectivity, and their performance is benchmarked in reverse osmosis water desalination. PA membranes are synthesized by the interfacial polymerization of m-phenylenediamine (MPD) and trimesoyl chloride (TMC), varying systematically reaction time, concentration, and stoichiometry, to yield large-area exceptionally planar films of ≈10 nm thickness. Reflectivity is employed to precisely determine membrane thickness and roughness, as well as the (TMC/MPD) concentration profile, and response to hydration in the vapor phase. PA film thickness is found to increase linearly with reaction time, albeit with a nonzero intercept, and the composition cross-sectional profile is found to be uniform, at the conditions investigated. Vapor hydration with H2O and D2O from 0 to 100% relative humidity results in considerable swelling (up to 20%), but also yields uniform cross-sectional profiles. The resulting film thickness is found to be predominantly set by the MPD concentration, while TMC regulates water uptake. A favorable correlation is found between higher swelling and water uptake with permeance. The data provide quantitative insight into the film formation mechanisms and correlate reaction conditions, cross-sectional nanostructure, and performance of the PA active layer in RO membranes for desalination.
Issue Date: 2-Aug-2017
Date of Acceptance: 4-Jul-2017
URI: http://hdl.handle.net/10044/1/52217
DOI: https://dx.doi.org/10.1002/adfm.201701738
ISSN: 1616-301X
Publisher: WILEY-V C H VERLAG GMBH
Journal / Book Title: ADVANCED FUNCTIONAL MATERIALS
Volume: 27
Issue: 37
Copyright Statement: © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This is the accepted version of the following article: F. Foglia, S. Karan, M. Nania, Z. Jiang, A. E. Porter, R. Barker, A. G. Livingston, J. T. Cabral, Adv. Funct. Mater. 2017, 27, 1701738, which has been published in final form at https://dx.doi.org/10.1002/adfm.201701738
Sponsor/Funder: BP International Limited
Funder's Grant Number: Order No. 75195/ICAM10 (IC)
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
neutron reflectivity
polyamide active layers
reverse osmosis
REVERSE-OSMOSIS MEMBRANES
INTERFACIAL POLYMERIZATION
THIN-FILMS
NANOFILTRATION MEMBRANES
MOLECULAR-DYNAMICS
RO MEMBRANES
ACTIVE LAYERS
NF MEMBRANES
FLUX
HETEROGENEITY
03 Chemical Sciences
09 Engineering
02 Physical Sciences
Materials
Publication Status: Published
Article Number: ARTN 1701738
Appears in Collections:Faculty of Engineering
Materials
Chemical Engineering
Faculty of Natural Sciences