Influence of ionic liquid content on properties of dense polymer membranes

Kohoutová, M.; Sikora, Antonín; Hovorka, Štěpán; Randová, Alena; Schauer, Jan; Tišma, Marina; Setničková, Kateřina; Petričkovič, Roman; Guernik, Silvina; Greenspoon, Noam; Izák, Pavel

doi:10.1016/j.eurpolymj.2008.11.043

Cited by 50 publications

(23 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, studies on (polymer + ionic liquid) membranes without complexing salt are limited. The question to be addressed in this paper is whether the ionic liquid EMIM-TY going into the polymer PEO acts as; (a) solvent or (b) electrolyte or (c) both as solvent and electrolyte or (d) an agent to produce "solventswollen" polymer electrolyte [27][28][29] or polymer-salt complex type electrolyte. A few studies are available in literature [30][31][32][33][34][35] which show that the ether oxygen of the PEO-backbone complexes with the ionic liquid cation (EMIM + ) which, in turn, affects the transport as well as phase behaviour.…”

Section: Introductionmentioning

confidence: 99%

Structural and transport studies on polymeric membranes of PEO containing ionic liquid, EMIM-TY: Evidence of complexation

2011

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Structural and transport studies on polymeric membranes of PEO containing ionic liquid, EMIM-TY: Evidence of complexation

2011

View full text Add to dashboard Cite

“…1 Ionic liquids have also been successfully applied in a wide range of applications, for instance in asymmetric synthesis, electrochemical applications, extractive separation in biotechnology, [2][3][4] and also in membrane gas separations 5 and pervaporation. 6 Their successful use is based on their extremely low volatility and consequent stability of the membrane compared to traditional supported liquid membranes.…”

Section: Introductionmentioning

confidence: 99%

High Ionic Liquid Content Polymeric Gel Membranes: Preparation and Performance

et al. 2010

View full text Add to dashboard Cite

Ionic liquid polymeric gel membranes containing from 20 wt % to 80 wt % of the ionic liquid 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMIM][TFSI]) in poly(vinylidene fluorideco-hexafluoropropylene) (p(VDF-HFP)) were prepared by solvent casting from a solution in acetone. The effect of the ionic liquid on the performance and properties of the membranes was discussed and compared with the neat polymer. In the presence of an excess of ionic liquid, p(VDF-HFP) membranes swell in a significant way, especially above 70°C, becoming completely soluble above 90°C. DSC analysis shows a gradual decrease of the melting point of the gel and a decrease in the overall melting enthalpy with increasing IL content, whereas the melting enthalpy normalized for the polymer fraction shows an initial drop and then a gradual increase. In the presence of the ionic liquid, the elastic modulus and break strength decrease dramatically, while the maximum deformation first increases due to higher flexibility of the plasticized polymer and then rapidly decreases above 40 wt % of IL as a consequence of the progressive decrease of the number of entanglements. X-ray studies demonstrate a reduction in the overall crystal content. The position of the strongest diffraction peak remains unaltered in all samples, suggesting that only the polymer chains crystallize and that no cocrystallization of ionic liquid and polymer takes place. Preliminary gas permeation measurements show a significant increase of the permeability in the presence of [EMIM][TFSI], especially for carbon dioxide. This suggests a potential application in gas separation membranes, for instance for natural gas treatment or for CO 2 sequestration from flue gas.

show abstract

“…2). Details of the experimental set-up and the measurement procedure and conditions have been described elsewhere [14]. All experiments were performed at 50 °C.…”

Section: Methodsmentioning

confidence: 99%

“…1) has a high value of gas permeability, just a little lower than acetylene-based polymers such as poly(1-trimethylsilyl-1-propyne) (PTMSP), but better selectivity [11][12][13]. Other recently reported membrane separation materials, such as blended poly(dimethylsiloxane) (PDMS) -ionic liquid membranes [14][15][16], have been proposed as an alternative to pure PDMS membranes, frequently used in the butanol-water and acetone-water pervaporation processes [17,18] or for recovery of different solutes [14,15]. However PIM membranes are more selective and therefore could be used for a variety of industrial separations [13,19,20].…”

Section: Introductionmentioning

confidence: 98%