2026-07-13T03:49:29Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/728842025-03-26T19:10:02Zcom_10324_1157com_10324_931com_10324_894col_10324_1298

Thin-Film Composite Cyclomatrix Poly(Phenoxy)Phosphazenes Membranes for Hot Hydrogen Separation Radmanesh, Farzaneh Sudholter, Ernst J.R. Elshof, Maria G. Benes, Nieck E. An interfacial polymerization process is introduced for the fabrication ofthermally stable cyclomatrix poly(phenoxy)phosphazenes thin-film com-posite membranes that can sieve hydrogen from hot gas mixtures. Byreplacing the conventionally used aqueous phase with dimethyl sulfoxide/potassium hydroxide, a variety of biphenol molecules are deprotonated toaryloxide anions that react with hexachlorocyclotriphosphazene dissolvedin cyclohexane to form a thin film of a highly cross-linked polymer film. Thefilm membranes have persistent permselectivities for hydrogen over nitrogen(16–27) and methane (14–30) while maintaining hydrogen permeances in theorder of (10−8–10−7 mol m−2s−1Pa−1) at temperatures as high as 260 °C anddo not lose their performance after exposure to 450 °C. The unprecedentedthermal stability of these polymer membranes opens the potential for indus-trial membrane gas separations at elevated temperatures. 2024-12-19T11:38:36Z 2024-12-19T11:38:36Z 2024-12-19T11:38:36Z 2023 info:eu-repo/semantics/article Adv. Mater. Interfaces 2023, 10, 2202077 https://uvadoc.uva.es/handle/10324/72884 10.1002/admi.202202077 eng https://onlinelibrary.wiley.com/doi/full/10.1002/admi.202202077 info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-nd/4.0/ Attribution-NonCommercial-NoDerivatives 4.0 Internacional