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Molecular Structure of Aromatic Reverse Osmosis Polyamide Barrier Layers
ACS Macro Letters ( IF 5.1 ) Pub Date : 2019-03-14 00:00:00 , DOI: 10.1021/acsmacrolett.9b00077 Qinyi Fu 1 , Nisha Verma 1 , Hongyang Ma 1, 2 , Francisco J Medellin-Rodriguez 1, 3 , Ruipeng Li 4 , Masafumi Fukuto 4 , Christopher M Stafford 5 , Benjamin S Hsiao 1 , Benjamin M Ocko 4
ACS Macro Letters ( IF 5.1 ) Pub Date : 2019-03-14 00:00:00 , DOI: 10.1021/acsmacrolett.9b00077 Qinyi Fu 1 , Nisha Verma 1 , Hongyang Ma 1, 2 , Francisco J Medellin-Rodriguez 1, 3 , Ruipeng Li 4 , Masafumi Fukuto 4 , Christopher M Stafford 5 , Benjamin S Hsiao 1 , Benjamin M Ocko 4
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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).
中文翻译：
芳香族反渗透聚酰胺阻隔层的分子结构
通过掠入射广角X射线散射（GIWAXS）表征了间苯二胺和均苯三甲酰氯在不同反应和后处理条件下的界面聚合制备的反渗透膜中聚酰胺阻隔层的分子结构。分子骨架堆积与具有优先表面诱导取向的两种不同的芳族分子堆积基序（平行和垂直）一致。结果表明，与平行填料（3.5-4.0 Å 间距）相比，垂直的 T 形填料基序（5 Å 间距）可能与最佳膜渗透性有关。
更新日期：2019-03-14
中文翻译：
芳香族反渗透聚酰胺阻隔层的分子结构
通过掠入射广角X射线散射（GIWAXS）表征了间苯二胺和均苯三甲酰氯在不同反应和后处理条件下的界面聚合制备的反渗透膜中聚酰胺阻隔层的分子结构。分子骨架堆积与具有优先表面诱导取向的两种不同的芳族分子堆积基序（平行和垂直）一致。结果表明，与平行填料（3.5-4.0 Å 间距）相比，垂直的 T 形填料基序（5 Å 间距）可能与最佳膜渗透性有关。
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