Room-temperature, one-pot process for CO2 capture membranes based on PEMA-g-PPG graft copolymer

Jung Pyo Jung, Cheol Hun Park, Jae Hun Lee, Youn-Sang Bae, Jong Hak Kim

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Gas separation based on membrane technology can possibly be used to offset the greenhouse effect because of its high energy efficiency and low cost. To achieve commercialization, it is essential that the gas-separation membrane demonstrates high performance and scalability. Here, we first report the room-temperature, one-pot process for CO2capture membranes based on the synthesis of a graft copolymer comprising of poly(ethylene-alt-maleic anhydride) (PEMA) main chains and poly(propylene glycol) (PPG) side chains. As confirmed by Fourier transform infrared (FT-IR) and nuclear magnetic resonance (1H NMR) spectroscopy, the PEMA-g-PPG synthesis was based on the complete reaction (100% conversion) of O-(2-aminopropyl)-O′-(2-methoxyethyl) polypropylene glycol (AMPPG) with PEMA in butanol (BuOH) at room temperature. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) revealed that the PEMA-g-PPG graft copolymer exists in an amorphous rubbery state with a bimodal microstructure. Without any post-treatment, the as-synthesized PEMA-g-PPG in BuOH was directly coated onto a microporous polysulfone support to form thin-film composite membranes. The membrane exhibited high selectivity (i.e. 82.6 for CO2/N2and 26.8 for CO2/CH4) and good CO2permeability (99.1 Barrer), outperforming conventional PEBAX block copolymer membranes. CO2uptake measurements confirmed enhanced CO2permeation resulting from the improved solubility of CO2in PEMA-g-PPG compared with those of neat PEMA and PEBAX. The PEMA-g-PPG membrane could be commercially feasible owing to its simple coating process, low cost, high selectivity, and scalability.

Original languageEnglish
Pages (from-to)1615-1622
Number of pages8
JournalChemical Engineering Journal
Volume313
DOIs
Publication statusPublished - 2017 Jan 1

Fingerprint

Maleic Anhydrides
Propylene Glycol
Graft copolymers
Maleic anhydride
Glycols
ethylene
Propylene
Ethylene
membrane
Membranes
temperature
Temperature
nuclear magnetic resonance
Scalability
Gases
Greenhouse effect
Membrane technology
Butanols
Polysulfones
Composite membranes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

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abstract = "Gas separation based on membrane technology can possibly be used to offset the greenhouse effect because of its high energy efficiency and low cost. To achieve commercialization, it is essential that the gas-separation membrane demonstrates high performance and scalability. Here, we first report the room-temperature, one-pot process for CO2capture membranes based on the synthesis of a graft copolymer comprising of poly(ethylene-alt-maleic anhydride) (PEMA) main chains and poly(propylene glycol) (PPG) side chains. As confirmed by Fourier transform infrared (FT-IR) and nuclear magnetic resonance (1H NMR) spectroscopy, the PEMA-g-PPG synthesis was based on the complete reaction (100{\%} conversion) of O-(2-aminopropyl)-O′-(2-methoxyethyl) polypropylene glycol (AMPPG) with PEMA in butanol (BuOH) at room temperature. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) revealed that the PEMA-g-PPG graft copolymer exists in an amorphous rubbery state with a bimodal microstructure. Without any post-treatment, the as-synthesized PEMA-g-PPG in BuOH was directly coated onto a microporous polysulfone support to form thin-film composite membranes. The membrane exhibited high selectivity (i.e. 82.6 for CO2/N2and 26.8 for CO2/CH4) and good CO2permeability (99.1 Barrer), outperforming conventional PEBAX block copolymer membranes. CO2uptake measurements confirmed enhanced CO2permeation resulting from the improved solubility of CO2in PEMA-g-PPG compared with those of neat PEMA and PEBAX. The PEMA-g-PPG membrane could be commercially feasible owing to its simple coating process, low cost, high selectivity, and scalability.",
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Room-temperature, one-pot process for CO2 capture membranes based on PEMA-g-PPG graft copolymer. / Jung, Jung Pyo; Park, Cheol Hun; Lee, Jae Hun; Bae, Youn-Sang; Kim, Jong Hak.

In: Chemical Engineering Journal, Vol. 313, 01.01.2017, p. 1615-1622.

Research output: Contribution to journalArticle

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