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SHUCHI SHARM
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Volume 46 All articles Published: 14 March 2023 Article ID 0050
Viscoelastic and high ion conducting gum tragacanth-based gel polymer electrolytes
VINEY SHARMA NARINDER ARORA RAJIV KUMAR SUNAINA VERMA SHUCHI SHARM
Gum tragacanth (GT) based gel polymer electrolytes (GPEs)/hydrogels have been synthesized using deionized water (DW) and NaOH salt, and characterized through ionic conductivity, Fourier transform infrared (FTIR), pH, thermal and mechanical studies. Ionic conductivity decrement of liquid and GPEs was observed with the increase of temperature that contradicts pre-existing theoretical equation, i.e., ${\sigma}$ = ${\sigma}_o$ exp.(-
Ea/kT ) and maximum ionic conductivity of 8.75 ${\times}$ 10$^{–2}$ S cm$^{–1}$ observed for GPE containing 0.625 M NaOH salt at 30°C. Effect of temperature on pH has been investigated for different GPEs and the results were also supported by FTIR studies by formation of new and disappearance of old peaks. Thermogravimetric analysis studies involved the measurements of $T_g$ for GPEs with the incorporation of different concentrations of NaOH salt, supported by DTG thermograms. Viscoelastic behaviour of GPEs with and without salt have been described by rheological studies at 30°C. In spite of that, time-dependent high structure recovery ratio pointed out the sol to gel transition in GPEs after the removal of applied shear rate. Due to high ion conducting, thermally and mechanically strengthened GPEs-based materials may make them applicable for their use in different device applications.
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Bulletin of Materials Science
Volume 46, 2023
All articles
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Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
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