CO2 Capture and Low-Temperature Release by Poly(aminoethyl methacrylate) and Derivatives

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Abstract

Poly(aminoethyl methacrylate) (PAEMA), poly-(ethylene oxide)-block-(aminoethyl methacrylate) (PEO-PAEMA), and their guanidinylated derivates, poly(guanidine ethyl methacry-late) (PGEMA) and poly(ethylene oxide)-block-(guanidine ethyl methacrylate) (PEO-PGEMA), were prepared to study their capabilities for CO2 adsorption and release. The polymers of different forms or degree of guanidinylation were thoroughly characterized, and their interaction with CO2 was studied by NMR and calorimetry. The extent and kinetics of adsorption and desorption of N-2 and CO2 were investigated by thermogravimetry under controlled gas atmospheres. The materials did not adsorb N-2, whereas CO2 could be reversibly adsorbed at room temperature and released by an elevated temperature. The most promising polymer was PGEMA with a guanidinylation degree of 7% showing a CO2 adsorption capacity of 2.4 mmol/g at room temperature and a desorption temperature of 72 degrees C. The study also revealed relations between the polymer chemical composition and CO2 adsorption and release characteristics that are useful in future formulations for CO2 adsorbent polymer materials.

Original languageEnglish
JournalLangmuir
Number of pages12
ISSN0743-7463
DOIs
Publication statusPublished - 8 Dec 2021
MoE publication typeA1 Journal article-refereed

Fields of Science

  • 116 Chemical sciences
  • NUCLEAR-MAGNETIC-RESONANCE
  • CARBON-DIOXIDE REACTIONS
  • RAFT POLYMERIZATION
  • SEPARATION PERFORMANCE
  • COMPOSITE MEMBRANES
  • AMINE STRUCTURE
  • LIQUID AMINES
  • SYSTEMS
  • DEGRADATION
  • PERMEATION

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