Molecular Structure of Aromatic Reverse Osmosis Polyamide Barrier Layers

被引：32

作者：

Fu, Qinyi ^{[1
]}

Verma, Nisha ^{[1
]}

Ma, Hongyang ^{[1
,2
]}

Medellin-Rodriguez, Francisco J. ^{[1
,3
]}

Li, Ruipeng ^{[4
]}

Fukuto, Masafumi ^{[4
]}

Stafford, Christopher M. ^{[5
]}

Hsiao, Benjamin S. ^{[1
]}

Ocko, Benjamin M. ^{[4
]}

机构：

[1] SUNY Stony Brook, Dept Chem, Stony Brook, NY 11794 USA

[2] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China

[3] Univ Autonoma San Luis Potosi, FCQ, San Luis Potosi 78210, Slp, Mexico

[4] Brookhaven Natl Lab, Natl Synchrotron Light Source 2, Upton, NY 11973 USA

[5] NIST, Mat Sci & Engn Div, Gaithersburg, MD 20899 USA

来源：

ACS MACRO LETTERS | 2019年 / 8卷 / 04期

基金：

美国国家科学基金会;

关键词：

FILM COMPOSITE MEMBRANES; MORPHOLOGY; TRANSPORT; DYNAMICS; FUTURE; ENERGY;

D O I：

10.1021/acsmacrolett.9b00077

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

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 A spacing) might be associated with optimal membrane permeance, compared with the parallel packings (3.5-4.0 angstrom spacings).

引用

页码：352 / 356

页数：9

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