ADDIhttps://addi.ehu.es:4432020-04-09T00:18:18Z2020-04-09T00:18:18ZInfluence of Anion Structure on Thermal, Mechanical and CO2 Solubility Properties of UV-Cross-Linked Poly(ethylene glycol) Diacrylate IongelsMartins, Ana P. S.Fernández De Añastro Arrieta, AsierOlmedo Martínez, Jorge L.Nabais, Ana R.Neves, Luísa A.Mecerreyes Molero, DavidTomé, Liliana C.http://hdl.handle.net/10810/426582020-04-08T18:19:04Z2020-03-17T00:00:00ZInfluence of Anion Structure on Thermal, Mechanical and CO2 Solubility Properties of UV-Cross-Linked Poly(ethylene glycol) Diacrylate Iongels
Martins, Ana P. S.; Fernández De Añastro Arrieta, Asier; Olmedo Martínez, Jorge L.; Nabais, Ana R.; Neves, Luísa A.; Mecerreyes Molero, David; Tomé, Liliana C.
Iongel-based CO2 separation membranes were prepared by fast (< 1 min) UV-initiated polymerization of poly(ethylene glycol) diacrylate (PEGDA) in the presence of different ionic liquids (ILs) with the [C2mim]+ cation and anions such as [TFSI]−, [FSI]−, [C(CN)3]− and [B(CN)4]−. The four ILs were completely miscible with the non-ionic PEGDA network. Transparent and free-standing iongels containing between 60 and 90 %wt of IL were obtained and characterized by diverse techniques (FTIR, TGA, DSC, DMTA, SEM, CO2 solubility and pure gas permeability). The thermal and mechanical stability of the iongels, as well as CO2 solubility, were found to be strictly dependent on the IL content and the anion’s nature. The TGA results indicated that the iongels mostly follow the thermal profile of the respective neat ILs. The DMTA analysis revealed that the iongels based on fluorinated anions have higher storage modulus than those of cyano-functionalized anions. Conversely, the PEGDA–C(CN)3 iongels presented the highest CO2 solubility values ranging from 72 to 80 mmol/g. Single CO2 permeabilities of 583 ± 29 Barrer and ideal CO2/N2 selectivities of 66 ± 3 were obtained with the PEGDA–70 C(CN)3 iongel membrane. This work demonstrates that the combination of PEGDA with high contents of the best performing ILs is a promising and simple strategy, opening up new possibilities in the design of high-performance iongel membranes for CO2 separation.
2020-03-17T00:00:00ZOn Some New Multivalued Results in the Metric Spaces of Perov’s TypeGuran, LilianaBota, Monica-FeliciaNaseem, AsimMitrović, Zoran D.De la Sen Parte, ManuelRadenović, Stojanhttp://hdl.handle.net/10810/426572020-04-08T17:59:11Z2020-03-17T00:00:00ZOn Some New Multivalued Results in the Metric Spaces of Perov’s Type
Guran, Liliana; Bota, Monica-Felicia; Naseem, Asim; Mitrović, Zoran D.; De la Sen Parte, Manuel; Radenović, Stojan
The purpose of this paper is to present some new fixed point results in the generalized metric spaces of Perov’s sense under a contractive condition of Hardy–Rogers type. The data dependence of the fixed point set, the well-posedness of the fixed point problem and the Ulam–Hyers stability are also studied.
2020-03-17T00:00:00ZStability of Unbounded Differential Equations in Menger k-Normed Spaces: A Fixed Point TechniqueMadadi, MasoumehSaadati, RezaDe la Sen Parte, Manuelhttp://hdl.handle.net/10810/426562020-04-08T17:39:02Z2020-03-11T00:00:00ZStability of Unbounded Differential Equations in Menger k-Normed Spaces: A Fixed Point Technique
Madadi, Masoumeh; Saadati, Reza; De la Sen Parte, Manuel
We attempt to solve differential equations υ′(ν)=Γ(ν,υ(ν)) and use the fixed point technique to prove its Hyers–Ulam–Rassias stability in Menger k-normed spaces.
2020-03-11T00:00:00ZApproximation of Fixed Points of C*-Algebra-Multi-Valued Contractive Mappings by the Mann and Ishikawa Processes in Convex C*-Algebra-Valued Metric SpacesGhanifard, AzadehMasiha, Hashem ParvanehDe la Sen Parte, Manuelhttp://hdl.handle.net/10810/426552020-04-08T17:15:39Z2020-03-10T00:00:00ZApproximation of Fixed Points of C*-Algebra-Multi-Valued Contractive Mappings by the Mann and Ishikawa Processes in Convex C*-Algebra-Valued Metric Spaces
Ghanifard, Azadeh; Masiha, Hashem Parvaneh; De la Sen Parte, Manuel
The aim of the present paper is to state and prove some convergence theorems for the Mann and Ishikawa iteration schemes involving C∗ -algebra-multi-valued contractive mappings in the setting of convex C∗ -algebra-valued metric spaces. The convergence theorems of the proposed iterations to a common fixed point of finite and infinite family of such mappings are also established.
2020-03-10T00:00:00Z