Role of Polymer Architecture in CO₂ Capture from Air Using Supported Poly(alkylenimine)s: Linear vs Branched Polymers.

ABSTRACT: Direct air capture (DAC) of CO₂ coupled with geologic storage is a promising climate change mitigation strategy, with some applications employing amines supported on porous solids as CO₂ sorbents. While branched poly-(ethylenimine) (PEI) is the standard benchmark amine material, it suffers from limited oxidative stability. Poly-(propylenimine) (PPI), as an alternative, has previously demonstrated improved resistance to degradation under harsh oxidative conditions. Linear and branched PEI are commercially available, though at different molecular weights, while PPI is not commercially available. For this reason, a comparative study of all four polymers (linear PEI, branched PEI, linear PPI, branched PPI) has not been reported for DAC. In this study, we synthesize and co

SUBMITTER: Hoffman J 

PROVIDER: S-EPMC12670363 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature