Contact
    Start Publications Poly(ethylene glycol) Diacrylate Iongel Membranes Reinforced ...
    ←  Publication Finder
    Attension

    Poly(ethylene glycol) Diacrylate Iongel Membranes Reinforced with Nanoclays for CO2 Separation

    Year: 2021

    Journal: Membranes, Volume 11, DEC

    Authors: Nabais, Ana R.; Francisco, Rute O.; Alves, Vitor D.; Neves, Luisa A.; Tome, Liliana C.

    Organizations: FCT/MCTES [SFRH/BD/136963/2018, 2020.01555.CEECIND]; Associate Laboratory for Green Chemistry-LAQV; LEAF-Linking Landscape, Environment, Agriculture and Food - FCT/MCTES [UIDB/50006/2020, UIDP/50006/2020, UIDP/04129/2020, UIDB/04129/2020]

    Keywords: ionic liquids; UV cross-linked polymer network; nanoclays; iongels; hybrid organic-inorganic membranes; CO2 separation

    Despite the fact that iongels are very attractive materials for gas separation membranes, they often show mechanical stability issues mainly due to the high ionic liquid (IL) content (>= 60 wt%) needed to achieve high gas separation performances. This work investigates a strategy to improve the mechanical properties of iongel membranes, which consists in the incorporation of montmorillonite (MMT) nanoclay, from 0.2 to 7.5 wt%, into a cross-linked poly(ethylene glycol) diacrylate (PEGDA) network containing 60 wt% of the IL 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C(2)mim][TFSI]). The iongels were prepared by a simple one-pot method using ultraviolet (UV) initiated polymerization of poly(ethylene glycol) diacrylate (PEGDA) and characterized by several techniques to assess their physico-chemical properties. The thermal stability of the iongels was influenced by the addition of higher MMT contents (>5 wt%). It was possible to improve both puncture strength and elongation at break with MMT contents up to 1 wt%. Furthermore, the highest ideal gas selectivities were achieved for iongels containing 0.5 wt% MMT, while the highest CO2 permeability was observed at 7.5 wt% MMT content, due to an increase in diffusivity. Remarkably, this strategy allowed for the preparation and gas permeation of self-standing iongel containing 80 wt% IL, which had not been possible up until now.
    View publication