Abstract
Among the various separation membranes, the thin-film nanocomposites (TFN) membranes have been widely applied for gas separation. In the present study, TFN hollow fiber membranes using polydopamine (PD)-encapsulated ETS-4 (Engelhard titanosilicate-4), PD-ETS-TFN, with a pore size of 3–4 Å were prepared for gas separation applications. The proposed TFN hollow fiber membranes were prepared by condensation-based interfacial polymerization (IP) between poly(ethylenimine) as an aqueous monomer and 1,3,5-benzenetricarbonyl trichloride as an organic monomer on a porous PES [poly(ether sulfone)] substrate. The dopamine-encapsulated ETS-4 was incorporated inside the polyamide layer to maximize the hydrophilicity of the membrane. Various methods were employed to analyze the structures and characteristics of the ETS-4 and TFN membranes, and tests were conducted to evaluate the permeance of H2, CO2, N2, and CH4 through PD-ETS-TFN. The results revealed a facilitated transport property toward CO2. Due to the molecular sieving effect of the ETS-4, the proposed membranes achieved a permeance as high as 60.4 GPU toward H2 and H2/CO2 selectivity of 14.3.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.