1:1[ / -N -Bn-hydrazino] pseudopeptide−polymer bioconjugates were synthesized and investigated as additives in a reference gas separation membrane (Pebax ® ) for CO 2 capture. Pebax ® is a polyether block amide thermoplastic elastomer provided by Arkema and is already well known for its good performance for CO 2 separations. First, dimer and tetramer pseudopeptides were synthesized and their terminal amine was modified into a 'clickable' alkyne group in view of coupling. Second, an -azido acrylic poly(ethylene glycol)-based oligomer was obtained by single-electron transfer living radical polymerization and the two partners were coupled using copper(I) catalyzed alkyne-azide cycloaddition (CuAAC) 'click' chemistry. The pseudopeptides and their bioconjugates were then assessed as original additives in Pebax ® membranes for CO 2 /CH 4 and CO 2 /N 2 separations. The permeation data were analyzed according to the solution-diffusion model. Compared to pseudopeptides, the pseudopeptide−polymer bioconjugates enabled the membrane properties to be greatly improved with better permeability (×1.5) and a good constant selectivity for CO 2 capture. The best membrane properties were obtained with 3 eq. wt% of the tetramer-based bioconjugate with a CO 2 permeability of 194 Barrer (+46% compared to that of Pebax ® ) and constant selectivity ( CO 2 /N 2 = 44 and CO 2 /CH 4 = 13).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.