Effect of polar aprotic solvents on hydroxyethyl cellulose-based gel polymer electrolyte

Quasi-solid bioelectrolytes based on hydroxyethyl cellulose (HEC) and sodium iodide (NaI) in three different polar aprotic solvent systems, dimethylformamide (DMF), dimethyl sulfoxide (DMSO), and dimethylacetamide (DMA), were fabricated and characterized. FTIR studies revealed active solvent-ion int...

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Bibliographic Details
Published in:Ionics 2018-07, Vol.24 (7), p.1955-1964
Main Authors: Selvanathan, Vidhya, Halim, Muhammad Nasir Abdul, Azzahari, Ahmad Danial, Rizwan, Muhammad, Shahabudin, Nurshafiza, Yahya, Rosiyah
Format: Article
Language:English
Subjects:
Cellulose
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Dimethyl sulfoxide
Electrochemistry
Electrolytes
Energy Storage
Hydroxyethyl celluloses
Ion currents
Ionic mobility
Ions
Mechanical properties
Optical and Electronic Materials
Original Paper
Polymer gels
Polymers
Renewable and Green Energy
Rheological properties
Solvents
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Summary:Quasi-solid bioelectrolytes based on hydroxyethyl cellulose (HEC) and sodium iodide (NaI) in three different polar aprotic solvent systems, dimethylformamide (DMF), dimethyl sulfoxide (DMSO), and dimethylacetamide (DMA), were fabricated and characterized. FTIR studies revealed active solvent-ion interactions in DMF-based electrolytes in comparison to DMA and DMSO. The effect of the solvent system on the crystallinity of HEC gel electrolytes was more significant at low NaI concentration. In each solvent system, the highest ionic conductivity was achieved at 70 wt% NaI and generally DMF-based electrolytes showed higher conductivity than the other solvents. The availability of multiple complexation sites present in DMF is ascribed to improvement in ion mobility and hence conductivity. Rheological analysis was carried out to elucidate the mechanical properties of the gels. Generally, the mechanical strength of the polymer gels was unaffected by the type of solvent.
ISSN:0947-7047
1862-0760
DOI:10.1007/s11581-018-2455-0