Molecular Structure of Aromatic Reverse Osmosis Polyamide Barrier Layers

被引：29
|
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
收藏
页码：352 / 356
页数：9
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