Bifunctional ionic liquid in conductive biopolymer based on chitosan for electrochemical devices application

I. J. Shamsudin, Azizan Ahmad, Nur Hasyareeda Hassan, H. Kaddami

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Conductive polymer based on chitosan has been successfully prepared via solution casting technique with ionic liquid 1-butyl-3-methylimidazolium acetate ([Bmim][OAc]). [Bmim][OAc] plays two important roles in the conduction of chitosan: i) charge carrier and ii) plasticizer in this system. Appearance of new peaks and shifting of several characteristic peaks in the FTIR spectra signify the strong interactions between chitosan and [Bmim][OAc]. XRD diffractograms showed an increase in the amorphous region as the weight percentage (wt.%) of [Bmim][OAc] increases. SEM observations have proven the smoother surface morphology of the plasticized chitosan. The enhancement in the ionic conductivity (σ), is observed as the wt.% of [Bmim][OAc] increases. The highest σ achieved is (2.44 ± 0.41) × 10<sup>- 3</sup> S cm<sup>- 1</sup> measured at ambient temperature (298 K) and the corresponding activation energy is 0.2961 eV. The temperature dependence of conductivity is Arrhenian in the studied temperature range and achieved σ of (7.60 ± 0.62) × 10<sup>- 3</sup> S cm<sup>- 1</sup> at 70 °C. The increase in the ionic conductivity is related to the decrease of glass transition temperature (T<inf>g</inf>) as proven by the DSC analysis. High electrochemical stability of 3.4 V was achieved of the highest conducting electrolyte by means of linear sweep voltammetry (LSV). Transference number measurement confirms that ions predominate the conduction of electrolyte with 0.75 ion transference number.

Original languageEnglish
Pages (from-to)11-19
Number of pages9
JournalSolid State Ionics
Volume278
DOIs
Publication statusPublished - 28 May 2015

Fingerprint

Ionic Liquids
Biopolymers
biopolymers
Chitosan
Ionic liquids
acetates
Acetates
Ionic conductivity
liquids
Electrolytes
conduction
ion currents
Ions
Plasticizers
electrolytes
Voltammetry
Charge carriers
plasticizers
Temperature
Surface morphology

Keywords

  • 1-Butyl-3-methylimidazolium acetate
  • Biopolymer electrolytes
  • Chitosan
  • Ionic conductivity
  • Ionic liquid

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Chemistry(all)

Cite this

Bifunctional ionic liquid in conductive biopolymer based on chitosan for electrochemical devices application. / Shamsudin, I. J.; Ahmad, Azizan; Hassan, Nur Hasyareeda; Kaddami, H.

In: Solid State Ionics, Vol. 278, 28.05.2015, p. 11-19.

Research output: Contribution to journalArticle

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