https://scholars.lib.ntu.edu.tw/handle/123456789/625279
標題: | Effects of monomer rigidity on microstructures and properties of novel polyamide thin-film composite membranes prepared through interfacial polymerization for pervaporation dehydration | 作者: | Lee J.-Y Huang T.-Y Belle Marie Yap Ang M Huang S.-H Tsai H.-A RU-JONG JENG |
關鍵字: | Alcohol; Interfacial polymerization; Membrane separation; Pervaporation; Polyetherimide | 公開日期: | 2022 | 卷: | 657 | 來源出版物: | Journal of Membrane Science | 摘要: | In this study, thin-film composite (TFC) membranes were produced through interfacial polymerization between diamine and trimesoyl chloride on a polyetherimide (PEI) support. The TFC membranes with different diamines, 4,4′-((propane-2,2-diylbis(4,1-phenylene))bis(oxy))dianiline (BAPP), 4,4′-((methylene bis(4,1-phenylene))bis(oxy))dianiline (MPDA), and 6,6′-bis(4-aminopheoxy)-4,4,4′,4′,7,7′-hexamethyl-2,2′-spirobichroman (SBC), were denoted as TFCPEI/B, TFCPEI/M, and TFCPEI/S, respectively. These three aromatic diamines have different central moieties that affect reactivity during the interfacial polymerization reaction. The crosslinking degree of the TFC membranes increased in the following order: TFCPEI/S < TFCPEI/M < TFCPEI/B. Positron annihilation lifetime spectroscopy analysis also unveils that TFCPEI/B had the lowest free volume. These results reveal that the appropriate steric structure of the diamine molecules can create less compact structure without impeding the formation of the crosslinked polyamide selective layer. Moreover, the TFCPEI/B membrane had a flux of approximately 705 ± 46 g∙m−2 h−1, and the water concentration in the permeate was maintained at approximately 99.8 wt% at 25°C during the 70 wt% isopropanol solution dehydration. Furthermore, the TFCPEI/B membrane can be operated under broad operating conditions and possesses high long-term stability. © 2022 Elsevier B.V. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85131438854&doi=10.1016%2fj.memsci.2022.120702&partnerID=40&md5=730df5d5320c61bb5c702e8fc122c476 https://scholars.lib.ntu.edu.tw/handle/123456789/625279 |
ISSN: | 03767388 | DOI: | 10.1016/j.memsci.2022.120702 | SDG/關鍵字: | Amines; Chlorine compounds; Composite membranes; Dehydration; Evaporation; Polymerization; Positron annihilation spectroscopy; Thin films; Aromatic diamine; Interfacial polymerization; Membrane separation; Microstructure and properties; Novel polyamides; Pervaporation dehydration; Polyamide thin films; Thin film composite membranes; Thin film composites; Trimesoyl chloride; Pervaporation; 2 propanol; chloride; diamine; monomer; polyamide; Article; concentration (parameter); controlled study; cross linking; membrane; pervaporation; polymerization; positron annihilation lifetime spectroscopy; rigidity; stereospecificity; synthesis; thin film (procedure); Amines; Chlorine Compounds; Dehydration; Evaporation; Polymerization; Thin Films |
顯示於: | 高分子科學與工程學研究所 |
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