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Improved CO 2 separation performance of Matrimid®5218 membrane by addition of low molecular weight polyethylene glycol

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  • Mahsa Loloei
  • Abdolreza Moghadassi
  • Mohammadreza Omidkhah
  • Abtin Ebadi Amooghin

Abstract

Polyethylene glycols have received worldwide attention as a highly permeable CO 2 ‐philic polymer in carbon dioxide separation applications. In this study, we investigated the influence of a low molecular weight polyethylene glycol (PEG 200) on physicochemical, morphological, and gas separation properties of Matrimid®5218 as a novel polymer blend. Both symmetric and asymmetric Matrimid flat sheet membranes with 0–20 wt.% PEG were prepared via a dense film‐casting method. The miscibility of blends at low PEG concentrations (3–5 wt.%) was confirmed by differential scanning calorimetry (DSC) and polarized light microscopy (PLM). Moreover, the blends were partially miscible at higher PEG concentrations (10–20 wt.%). Matrimid/PEG molecular interactions were further studied by FTIR and XRD analysis. SEM images indicated an impressive influence of PEG on the symmetric structure of Matrimid membrane. An asymmetric structure with a dense thin skin layer and a highly porous sub‐layer was observed for the blends containing 10–20 wt.% PEG. The CO 2 permeability and CO 2 /CH 4 selectivity of the best‐yield CO 2 ‐selective blend membrane (Matrimid/PEG (95:5)) incvreased about 25% (from 7.68 to 9.62 Barrer) and 15% (from 35 to 40) compared to pure Matrimid, respectively. Furthermore studying the plasticization pressures of the membranes revealed that the more PEG content in blend the less the plasticization pressure obtained. © 2015 Society of Chemical Industry and John Wiley & Sons, Ltd

Suggested Citation

  • Mahsa Loloei & Abdolreza Moghadassi & Mohammadreza Omidkhah & Abtin Ebadi Amooghin, 2015. "Improved CO 2 separation performance of Matrimid®5218 membrane by addition of low molecular weight polyethylene glycol," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 5(5), pages 530-544, October.
    • Handle: RePEc:wly:greenh:v:5:y:2015:i:5:p:530-544
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    File URL: http://hdl.handle.net/10.1002/ghg.1496
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    References listed on IDEAS

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    1. Abtin Ebadi Amooghin & Mona Zamani Pedram & Mohammadreza Omidkhah & Reza Yegani, 2013. "A novel CO 2 ‐selective synthesized amine‐impregnated cross‐linked polyvinylalcohol/glutaraldehyde membrane: fabrication, characterization, and gas permeation study," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 3(5), pages 378-391, October.
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    1. Abtin Ebadi Amooghin & Mohammad Mehdi Moftakhari Sharifzadeh & Mona Zamani Pedram, 2018. "Rigorous modeling of gas permeation behavior in facilitated transport membranes (FTMs); evaluation of carrier saturation effects and double‐reaction mechanism," Greenhouse Gases: Science and Technology, Blackwell Publishing, vol. 8(3), pages 429-443, June.

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