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Poly(ethylene glycol) Diacrylate Iongel Membranes Reinforced with Nanoclays for $CO_{2}$ Separation
| Content Provider | MDPI |
|---|---|
| Author | Liliana, C. Tomé Nabais, Ana R. Francisco, Rute O. Alves, Vítor D. Neves, Luísa A. |
| Copyright Year | 2021 |
| Description | 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 $CO_{2}$ 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. |
| Starting Page | 998 |
| e-ISSN | 20770375 |
| DOI | 10.3390/membranes11120998 |
| Journal | Membranes |
| Issue Number | 12 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-12-20 |
| Access Restriction | Open |
| Subject Keyword | Membranes Polymer Science Ionic Liquids Uv Cross-linked Polymer Network Nanoclays Iongels Hybrid Organic-inorganic Membranes Co2 Separation |
| Content Type | Text |
| Resource Type | Article |
