2026-07-15T07:18:45Zhttps://uvadoc.uva.es/oai/request

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

00925njm 22002777a 4500 dc Radmanesh, Farzaneh author Sudholter, Ernst J.R. author Elshof, Maria G. author Benes, Nieck E. author 2023 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. Adv. Mater. Interfaces 2023, 10, 2202077 https://uvadoc.uva.es/handle/10324/72884 10.1002/admi.202202077 Thin-Film Composite Cyclomatrix Poly(Phenoxy)Phosphazenes Membranes for Hot Hydrogen Separation