Molecules (Sep 2022)

Controllable Construction of Amino-Functionalized Dynamic Covalent Porous Polymers for High-Efficiency CO<sub>2</sub> Capture from Flue Gas

  • Mingyue Qiu,
  • Haonan Wu,
  • Yi Huang,
  • Huijuan Guo,
  • Dan Gao,
  • Feng Pei,
  • Lijuan Shi,
  • Qun Yi

DOI
https://doi.org/10.3390/molecules27185853
Journal volume & issue
Vol. 27, no. 18
p. 5853

Abstract

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The design of high-efficiency CO2 adsorbents with low cost, high capacity, and easy desorption is of high significance for reducing carbon emissions, which yet remains a great challenge. This work proposes a facile construction strategy of amino-functional dynamic covalent materials for effective CO2 capture from flue gas. Upon the dynamic imine assembly of N-site rich motif and aldehyde-based spacers, nanospheres and hollow nanotubes with spongy pores were constructed spontaneously at room temperature. A commercial amino-functional molecule tetraethylenepentamine could be facilely introduced into the dynamic covalent materials by virtue of the dynamic nature of imine assembly, thus inducing a high CO2 capacity (1.27 mmol·g−1) from simulated flue gas at 75 °C. This dynamic imine assembly strategy endowed the dynamic covalent materials with facile preparation, low cost, excellent CO2 capacity, and outstanding cyclic stability, providing a mild and controllable approach for the development of competitive CO2 adsorbents.

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