Novel high performance poly(p-phenylene benzobisimidazole) (PBDI) membranes fabricated by interfacial polymerization for H₂ separation

Abstract

Novel polybenzimidazole (PBDI) membranes with ultrahigh H2 separation performance were developed by a facile interfacial polymerization approach.

Polyoctahedral Silsesquioxane Hexachlorocyclotriphosphazene Membranes for Hot Gas Separation

“… 1 − 7 However, at high temperatures, the separation of small gases is more difficult because of limited thermal stability and the increment of molecular dynamics of polymeric membranes. 3 By improving the stability and performance of polymeric membranes at these high-temperature conditions, they can offer a promising alternative to traditional technologies, such as for CO 2 capture and recovery in industrial processes. 8 Therefore, over the years, research has been focused on developing membranes that can perform the required separations at high temperatures, but the available number of studies is still limited.…”

“… 8 Therefore, over the years, research has been focused on developing membranes that can perform the required separations at high temperatures, but the available number of studies is still limited. 3 , 9 − 11 For this, a range of materials have been identified that might be of use for this purpose. 12 …”

N-alkylation briefly constructs tunable multifunctional sensor materials: Multianalyte detection and reversible adsorption

“…However, the small adsorption capacities of these materials hinder adsorption applications, and thus polymeric or other macromolecular materials are required to achieve simultaneous analyte removal by benzoxazole-based sensors ( Rabbani et al., 2017 ; Lv et al., 2021 ). Although polybenzimidazole ( PBI ) has been widely applied in a variety of areas ( Liang et al., 2019 ; Geng et al., 2019 ; Wang et al., 2019 ; Shan et al., 2019 ; Cui et al., 2021 ; Jin et al., 2021 ), there are only a few reports on sensing ( Park and Gong, 2017 ; Diao et al., 2018 ; Kaur et al., 2019 ) owing to the disadvantages of unmodified PBI , including poor solubility, weak fluorescence, and difficulties in achieving uniform dispersion in sensing systems. We speculated that the introduction of flexible chains into the backbone of PBI through simple N -alkylation would weaken π-π stacking between the polymer chains, thus reducing aggregation-caused quenching phenomena and improving the fluorescence properties of PBI .…”

High-Performance Polybenzimidazole Membranes for Helium Extraction from Natural Gas

“…PBDI is a rodlike aromatic polymer and initially investigated as proton-exchange membranes for fuel cells by molecular simulation. 29,30 The free-standing polybenzimidazole membranes made by nonsolvent phase inversion are very brittle and difficult to handle. 31−33 Robust gas separation membranes were fabricated by coating commercial poly(2,2′- m -phenylene-5,5′-bibenzimidazole) on porous inorganic tubes.…”