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Title: Molecular Structure of Aromatic Reverse Osmosis Polyamide Barrier Layers

Journal Article · · ACS Macro Letters
ORCiD logo [1];  [1];  [2];  [3];  [4];  [4]; ORCiD logo [5]; ORCiD logo [1]; ORCiD logo [4]
  1. Stony Brook Univ., Stony Brook, NY (United States). Dept. of Chemistry
  2. Stony Brook Univ., Stony Brook, NY (United States). Dept. of Chemistry; Beijing Univ. of Chemical Technology, Beijing (China)
  3. Stony Brook Univ., Stony Brook, NY (United States). Dept. of Chemistry; Autonomous Univ. of San Luis Potosí, San Luis Potosí (Mexico)
  4. Brookhaven National Laboratory (BNL), Upton, NY (United States)
  5. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)

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). Thus, the molecular backbone packing is consistent with two different aromatic molecular packing motifs (parallel and perpendicular) with preferential surface-induced orientation. The results imply 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).

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1502806
Report Number(s):
BNL-211434-2019-JAAM
Journal Information:
ACS Macro Letters, Vol. 8; ISSN 2161-1653
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 14 works
Citation information provided by
Web of Science

References (26)

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