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authors |
Fernandes, M; Cardoso, MA; Rodrigues, LC; Silva, MM; Ferreira, RAS; Carlos, LD; Nunes, SC; Bermudez, VD |
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nationality |
International |
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journal |
JOURNAL OF ELECTROANALYTICAL CHEMISTRY |
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author keywords |
Poly(e-caprolactone)/siloxane hybrid; N-Ethylimidazolium trifluoromethanesulfonate; N-Butylimidazolium trifluoromethanesulfonate; Structure; Morphology; Ionic conductivity |
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keywords |
BRONSTED ACID-BASE; FUEL-CELL ELECTROLYTES; ELECTROCHROMIC DEVICES; MEMBRANES; COMPLEXES |
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abstract |
Organic/inorganic biohybrids composed of poly(e-caprolactone) (PCL(530)) (where 530 represents the average molecular weight of the chains in gmol(-1)) chains covalently bonded to a siloxane network via urethane linkages and incorporating protic ionic liquids (PILs) were investigated. The materials (H-P1L(x), where H represents the host hybrid matrix and X is the ratio, in %, of the mass of PIL per mass of organic precursor) were doped with two different concentrations of N-ethylimidazolium trifluoromethanesulfonate ([EIm] (TfO]) and N-butylimidazolium trifluoromethanesulfonate ([BIm][TfO]). The samples were processed as essentially amorphous and transparent films, thermally stable up to at least 200 degrees C. The highest ionic conductivity value (4.3 x 10(-5) S cm(-1)) was measured for H-[Elm] [TfO] (16.4) at 105 degrees C. This work emphasizes that Scanning Electron Microscopy (SEM)/Energy Dispersive X-ray Spectroscopy (EDS) measurements are mandatory for the morphological characterization of IL-based electrolytes. In the case of the most concentrated [BIm] [TfO]-doped hybrid studied this technique enabled the detection of segregated silica-rich circular micro-sized regions formed as a result of the hydrophobic interactions established between the bulky butyl chains of the [BIm](+) cation and the PCL(530) chains of the host matrix. |
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publisher |
ELSEVIER SCIENCE SA |
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issn |
1572-6657 |
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isbn |
1873-2569 |
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year published |
2017 |
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volume |
799 |
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beginning page |
249 |
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ending page |
256 |
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digital object identifier (doi) |
10.1016/j.jelechem.2017.06.009 |
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web of science category |
Chemistry, Analytical; Electrochemistry |
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subject category |
Chemistry; Electrochemistry |
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unique article identifier |
WOS:000411847300031
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