RT info:eu-repo/semantics/article
T1 Nonaqueous Interfacial Polymerization-Derived Polyphosphazene Films for Sieving or Blocking Hydrogen Gas
A1 Radmanesh, Farzaneh
A1 Tena Matias, Alberto
A1 Sudholter, Ernst J.R.
A1 Hempenius, Mark A.
A1 Benes, Nieck E.
AB A series of cyclomatrix polyphosphazene films have been prepared by nonaqueous interfacial polymerization (IP) of small aromatic hydroxyl compounds in a potassium hydroxide dimethylsulfoxide solution and hexachlorocyclotriphosphazene in cyclohexane on top of ceramic supports. Via the amount of dissolved potassium hydroxide, the extent of deprotonation of the aromatic hydroxyl compounds can be changed, in turn affecting the molecular structure and permselective properties of the thin polymer networks ranging from hydrogen/oxygen barriers to membranes with persisting hydrogen permselectivities at high temperatures. Barrier films are obtained with a high potassium hydroxide concentration, revealing permeabilities as low as 9.4 × 10–17 cm3 cm cm–2 s–1 Pa–1 for hydrogen and 1.1 × 10–16 cm3 cm cm–2 s–1 Pa–1 for oxygen. For films obtained with a lower concentration of potassium hydroxide, single gas permeation experiments reveal a molecular sieving behavior, with a hydrogen permeance of around 10–8 mol m–2 s–1 Pa–1 and permselectivities of H2/N2 (52.8), H2/CH4 (100), and H2/CO2 (10.1) at 200 °C
PB ACS Publications
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/72885
UL https://uvadoc.uva.es/handle/10324/72885
LA eng
NO ACS Appl. Polym. Mater. 2023, 5, 3, 1955–1964
NO Producción Científica
DS UVaDOC
RD 22-dic-2024