Molecular Structure of Aromatic Reverse Osmosis Polyamide Barrier Layers
Journal Article
·
· ACS Macro Letters
- Stony Brook Univ., Stony Brook, NY (United States). Dept. of Chemistry
- Stony Brook Univ., Stony Brook, NY (United States). Dept. of Chemistry; Beijing Univ. of Chemical Technology, Beijing (China)
- Stony Brook Univ., Stony Brook, NY (United States). Dept. of Chemistry; Autonomous Univ. of San Luis Potosí, San Luis Potosí (Mexico)
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- 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
Cited by: 14 works
Citation information provided by
Web of Science
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