Thin film composite membrane prepared by interfacial polymerization as an ion exchange membrane for salinity gradient power

• Published in: Journal of industrial and engineering chemistry (Seoul, Korea) Vol. 59; pp. 362 - 371
• Main Authors: Park, Chul Ho, Bae, Harim, Choi, Wook, Lee, Kangwon, Oh, Dea-gyun, Lee, Jonghwi, Lee, Jung-Hyun
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 25.03.2018; 한국공업화학회
• Subjects: Interfacial polymerization; Ion exchange membranes; Salinity gradient power; Thin film composite; 화학공학; Interfacial polymerization; Salinity gradient power; Thin film composite; Ion exchange membranes
• ISSN: 1226-086X; 1876-794X
• DOI: 10.1016/j.jiec.2017.10.044

[Display omitted] •Thin film composite (TFC) membranes were studied for salinity gradient power (SGP).•Interfacial polymerization mechanisms was understood using partition coefficient values.•Through screening the combinations among aqueous and organic monomers, DBA-TMC TFC membranes were found for the best performance for SGP.•The DBA-TMC TFC membrane has a higher normalized power density (7.2W/m2) than the other membranes (e.g., Nafion). For extracting the salinity gradient energy, membrane is a key material with a high power density. For this purpose, thin film composite (TFC) membranes were synthesized by interfacial polymerization using various acyl chloride and amine monomers. TFC membranes were characterized by FT-IR, SEM, XPS, and AFM. Among the range of TFC, the best candidate was prepared by combining 3,5-diaminebenzonic acid (0.5wt% with distilled water) and 1,3,5-benzenetricarbonyl trichloride (0.2wt% with n-hexane). The TFC membrane (thickness=0.02mm) generated a power density of 7.2W/m2 at salinity gradient between 0.005 and 0.5M KCl solutions.