Covalent and electrostatic incorporation of amines into hypercrosslinked polymers for increased CO<sub>2</sub> selectivity



Alahmed, Ammar H, Briggs, Michael E ORCID: 0000-0003-1474-1267, Cooper, Andrew I ORCID: 0000-0003-0201-1021 and Adams, Dave J
(2018) Covalent and electrostatic incorporation of amines into hypercrosslinked polymers for increased CO<sub>2</sub> selectivity. JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 56 (22). pp. 2513-2521.

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Abstract

<jats:title>ABSTRACT</jats:title><jats:p>Two methods of incorporating functional groups rich in nitrogen into low cost microporous hypercrosslinked polymers (HCPs) have been evaluated and the effects on the carbon dioxide CO<jats:sub>2</jats:sub>/N<jats:sub>2</jats:sub> IAST selectivity were measured. Electrostatic incorporation of an ammonium salt into a sulfonic acid‐containing HCP polymer afforded a static CO<jats:sub>2</jats:sub> uptake of 2.5 mmol g<jats:sup>−1</jats:sup> with a CO<jats:sub>2</jats:sub>/N<jats:sub>2</jats:sub> IAST selectivity of 42:1 at 1 bar and 298 K. Using column breakthrough measurements with a 15:85 CO<jats:sub>2</jats:sub>/N<jats:sub>2</jats:sub> mixture at 298 K and 1 bar, a selectivity of 17:1 was obtained. However, varying the counterion resulted in polymers with lower CO<jats:sub>2</jats:sub>/N<jats:sub>2</jats:sub> selectivity values. Decoration of the parent polymer with CO<jats:sub>2</jats:sub>‐philic imidazole followed by electrostatic ammonium salt incorporation blocked some of the micropores reducing the selectivity which re‐emphasizes the role and importance of pore width for CO<jats:sub>2</jats:sub>/N<jats:sub>2</jats:sub> selectivity. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. <jats:bold>2018</jats:bold>, 56, 2513–2521</jats:p>

Item Type: Article
Uncontrolled Keywords: CO2 capture, cost efficiency, hypercrosslinked polymers, increased selectivity, microporous materials
Depositing User: Symplectic Admin
Date Deposited: 17 Aug 2018 14:39
Last Modified: 05 Oct 2023 09:26
DOI: 10.1002/pola.29228
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3025114