Molecular Structure of Aromatic Reverse Osmosis Polyamide Barrier Layers

Qinyi Fu; Nisha Verma; Hongyang Ma; Francisco J. Medellin-Rodriguez; Ruipeng Li; Masafumi Fukuto; Christopher M. Stafford; Benjamin S. Hsiao; Benjamin M. Ocko

doi:10.1021/acsmacrolett.9b00077

Molecular Structure of Aromatic Reverse Osmosis Polyamide Barrier Layers

Qinyi Fu
, Nisha Verma
, Hongyang Ma
, Francisco J. Medellin-Rodriguez
, Ruipeng Li
, Masafumi Fukuto
, Christopher M. Stafford
, Benjamin S. Hsiao
, Benjamin M. Ocko

Chemistry

Stony Brook University
Beijing University of Chemical Technology
Universidad Autonoma de San Luis Potosi
Brookhaven National Laboratory
National Institute of Standards and Technology

Research output: Contribution to journal › Article › peer-review

44 Scopus citations

Abstract

The molecular structures of polyamide barrier layers in reverse osmosis membranes, made by interfacial polymerization of m-phenylenediamine and trimesoyl chloride under different reaction and post-treatment conditions, were characterized by grazing incidence wide-angle X-ray scattering (GIWAXS). The molecular backbone packing is consistent with two different aromatic molecular packing motifs (parallel and perpendicular) with preferential surface-induced orientation. The results suggest that the perpendicular, T-shaped, packing motif (5 Å spacing) might be associated with optimal membrane permeance, compared with the parallel packings (3.5-4.0 Å spacings).

Original language	English
Pages (from-to)	352-356
Number of pages	5
Journal	ACS Macro Letters
Volume	8
Issue number	4
DOIs	https://doi.org/10.1021/acsmacrolett.9b00077
State	Published - Apr 16 2019

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title = "Molecular Structure of Aromatic Reverse Osmosis Polyamide Barrier Layers",

abstract = "The molecular structures of polyamide barrier layers in reverse osmosis membranes, made by interfacial polymerization of m-phenylenediamine and trimesoyl chloride under different reaction and post-treatment conditions, were characterized by grazing incidence wide-angle X-ray scattering (GIWAXS). The molecular backbone packing is consistent with two different aromatic molecular packing motifs (parallel and perpendicular) with preferential surface-induced orientation. The results suggest that the perpendicular, T-shaped, packing motif (5 {\AA} spacing) might be associated with optimal membrane permeance, compared with the parallel packings (3.5-4.0 {\AA} spacings).",

author = "Qinyi Fu and Nisha Verma and Hongyang Ma and Medellin-Rodriguez, \{Francisco J.\} and Ruipeng Li and Masafumi Fukuto and Stafford, \{Christopher M.\} and Hsiao, \{Benjamin S.\} and Ocko, \{Benjamin M.\}",

note = "Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

year = "2019",

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doi = "10.1021/acsmacrolett.9b00077",

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TY - JOUR

T1 - Molecular Structure of Aromatic Reverse Osmosis Polyamide Barrier Layers

AU - Fu, Qinyi

AU - Verma, Nisha

AU - Ma, Hongyang

AU - Medellin-Rodriguez, Francisco J.

AU - Li, Ruipeng

AU - Fukuto, Masafumi

AU - Stafford, Christopher M.

AU - Hsiao, Benjamin S.

AU - Ocko, Benjamin M.

PY - 2019/4/16

Y1 - 2019/4/16

N2 - The molecular structures of polyamide barrier layers in reverse osmosis membranes, made by interfacial polymerization of m-phenylenediamine and trimesoyl chloride under different reaction and post-treatment conditions, were characterized by grazing incidence wide-angle X-ray scattering (GIWAXS). The molecular backbone packing is consistent with two different aromatic molecular packing motifs (parallel and perpendicular) with preferential surface-induced orientation. The results suggest that the perpendicular, T-shaped, packing motif (5 Å spacing) might be associated with optimal membrane permeance, compared with the parallel packings (3.5-4.0 Å spacings).

AB - The molecular structures of polyamide barrier layers in reverse osmosis membranes, made by interfacial polymerization of m-phenylenediamine and trimesoyl chloride under different reaction and post-treatment conditions, were characterized by grazing incidence wide-angle X-ray scattering (GIWAXS). The molecular backbone packing is consistent with two different aromatic molecular packing motifs (parallel and perpendicular) with preferential surface-induced orientation. The results suggest that the perpendicular, T-shaped, packing motif (5 Å spacing) might be associated with optimal membrane permeance, compared with the parallel packings (3.5-4.0 Å spacings).

UR - https://www.scopus.com/pages/publications/85063132398

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DO - 10.1021/acsmacrolett.9b00077

M3 - Article

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AN - SCOPUS:85063132398

SN - 2161-1653

VL - 8

SP - 352

EP - 356

JO - ACS Macro Letters

JF - ACS Macro Letters

IS - 4

ER -

Molecular Structure of Aromatic Reverse Osmosis Polyamide Barrier Layers

Abstract

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