The Counterion Effect of Imidazolium-Type Poly(ionic liquid) Brushes on Carbon Dioxide Adsorption

Na Li; Rong Qu; Xiaoyu Han; Weiran Lin; Haining Zhang; Zhenyu J. Zhang

doi:10.1002/cplu.201800636

The Counterion Effect of Imidazolium-Type Poly(ionic liquid) Brushes on Carbon Dioxide Adsorption

Na Li, Rong Qu, Xiaoyu Han, Weiran Lin^*, Haining Zhang, Zhenyu J. Zhang

^*Corresponding author for this work

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Imidazolium-based poly(ionic liquid) brushes were attached to spherical silica nanoparticles bearing various functionalities by using a surface-initiated atom transfer radical polymerization (“grafting from” technique). A temperature-programmed desorption process was applied to evaluate and analyze the carbon dioxide adsorption performance of the synthesized polymer brushes. The confined structure of the surface-attached polymer chains facilitates gas transport and adsorption, leading to an enhanced adsorption capacity of carbon dioxide molecules compared with pure polymer powders. Temperature-programmed desorption profiles of the synthesized polymer brushes after carbon dioxide adsorption reveal that the substituent groups on the nitrogen atom at the 3-position of the imidazole ring, as well as the associated anions significantly affect the adsorption capacity of functionalized poly(ionic liquid) brushes. Of the tested samples, amine-functionalized poly(ionic liquid) brushes associated with hexafluorophosphate ions exhibit the highest carbon dioxide adsorption capacity of 2.56 mmol g ⁻¹ (112.64 mg g ⁻¹ ) at 25 °C under a carbon dioxide partial pressure of 0.2 bar.

Original language	English
Pages (from-to)	281-288
Number of pages	8
Journal	ChemPlusChem
Volume	84
Issue number	3
DOIs	https://doi.org/10.1002/cplu.201800636
Publication status	Published - Mar 2019

Bibliographical note

Funding Information:
This work was supported by the Natural Science Foundation of China under grant numbers of 21576216 and 21878239, and International Cooperation and Exchanges Projects of Hubei Province (2017AHB057).

Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim

Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.

Keywords

CO adsorption
nanoparticles
poly(ionic liquid)s
polymer brushes
surfaces

ASJC Scopus subject areas

Chemistry(all)

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10.1002/cplu.201800636

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title = "The Counterion Effect of Imidazolium-Type Poly(ionic liquid) Brushes on Carbon Dioxide Adsorption",

abstract = " Imidazolium-based poly(ionic liquid) brushes were attached to spherical silica nanoparticles bearing various functionalities by using a surface-initiated atom transfer radical polymerization (“grafting from” technique). A temperature-programmed desorption process was applied to evaluate and analyze the carbon dioxide adsorption performance of the synthesized polymer brushes. The confined structure of the surface-attached polymer chains facilitates gas transport and adsorption, leading to an enhanced adsorption capacity of carbon dioxide molecules compared with pure polymer powders. Temperature-programmed desorption profiles of the synthesized polymer brushes after carbon dioxide adsorption reveal that the substituent groups on the nitrogen atom at the 3-position of the imidazole ring, as well as the associated anions significantly affect the adsorption capacity of functionalized poly(ionic liquid) brushes. Of the tested samples, amine-functionalized poly(ionic liquid) brushes associated with hexafluorophosphate ions exhibit the highest carbon dioxide adsorption capacity of 2.56 mmol g −1 (112.64 mg g −1 ) at 25 °C under a carbon dioxide partial pressure of 0.2 bar. ",

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author = "Na Li and Rong Qu and Xiaoyu Han and Weiran Lin and Haining Zhang and Zhang, {Zhenyu J.}",

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year = "2019",

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doi = "10.1002/cplu.201800636",

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AU - Qu, Rong

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AU - Lin, Weiran

AU - Zhang, Haining

AU - Zhang, Zhenyu J.

N1 - Funding Information: This work was supported by the Natural Science Foundation of China under grant numbers of 21576216 and 21878239, and International Cooperation and Exchanges Projects of Hubei Province (2017AHB057). Publisher Copyright: © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Copyright: Copyright 2019 Elsevier B.V., All rights reserved.

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N2 - Imidazolium-based poly(ionic liquid) brushes were attached to spherical silica nanoparticles bearing various functionalities by using a surface-initiated atom transfer radical polymerization (“grafting from” technique). A temperature-programmed desorption process was applied to evaluate and analyze the carbon dioxide adsorption performance of the synthesized polymer brushes. The confined structure of the surface-attached polymer chains facilitates gas transport and adsorption, leading to an enhanced adsorption capacity of carbon dioxide molecules compared with pure polymer powders. Temperature-programmed desorption profiles of the synthesized polymer brushes after carbon dioxide adsorption reveal that the substituent groups on the nitrogen atom at the 3-position of the imidazole ring, as well as the associated anions significantly affect the adsorption capacity of functionalized poly(ionic liquid) brushes. Of the tested samples, amine-functionalized poly(ionic liquid) brushes associated with hexafluorophosphate ions exhibit the highest carbon dioxide adsorption capacity of 2.56 mmol g −1 (112.64 mg g −1 ) at 25 °C under a carbon dioxide partial pressure of 0.2 bar.

AB - Imidazolium-based poly(ionic liquid) brushes were attached to spherical silica nanoparticles bearing various functionalities by using a surface-initiated atom transfer radical polymerization (“grafting from” technique). A temperature-programmed desorption process was applied to evaluate and analyze the carbon dioxide adsorption performance of the synthesized polymer brushes. The confined structure of the surface-attached polymer chains facilitates gas transport and adsorption, leading to an enhanced adsorption capacity of carbon dioxide molecules compared with pure polymer powders. Temperature-programmed desorption profiles of the synthesized polymer brushes after carbon dioxide adsorption reveal that the substituent groups on the nitrogen atom at the 3-position of the imidazole ring, as well as the associated anions significantly affect the adsorption capacity of functionalized poly(ionic liquid) brushes. Of the tested samples, amine-functionalized poly(ionic liquid) brushes associated with hexafluorophosphate ions exhibit the highest carbon dioxide adsorption capacity of 2.56 mmol g −1 (112.64 mg g −1 ) at 25 °C under a carbon dioxide partial pressure of 0.2 bar.

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KW - surfaces

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The Counterion Effect of Imidazolium-Type Poly(ionic liquid) Brushes on Carbon Dioxide Adsorption

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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