Structural Study of Plasticized Carboxy Methylcellulose Based Solid Biopolymer Electrolyte

Abstract

Carboxyl methylcellulose (CMC) doped with oleic acid (OA) and plasticized with glycerol was able to be produced into solid biopolymer electrolytes using the solution cast technique. The CMC-OA-glycerol solid polymer electrolyte obtained the highest conductivity of 1.64 x 10-4 S cm-1 at room temperature for sample Gly 40 wt. %. Within the temperature range investigated, the conductivity– temperature relationship of the biopolymer electrolytes is characteristically Arrhenius behaviour, suggesting that the conductivity is thermally assisted. Fourier Transform Infrared studies was carried out to determine the dissociation of free protons (H+) from the carboxyl group (–COOH) of glycerol.

Novel Proton Conducting Solid Bio-polymer Electrolytes Based on Carboxymethyl Cellulose Doped with Oleic Acid and Plasticized with Glycerol

“…As we have reported previously 25 32 , the relationship between conductivity and temperature of the SBEs are naturally Arrhenius behaviour. The thermal properties results of CMC-OA-Gly SBEs shows a good fit of R 2 ~ 1 for each sample in the series.…”

“…The ionic mobility ( μ ) and the diffusion coefficient ( D ) plays a weak role in influencing the conductivity values of CMC-OA-Gly SBEs. As the Gly content increases, it is believed that more protons H + referring to n are supplied due to the dissociation of plasticizer, as proved in the FTIR study from previous work 32 . The increment of n in the SBE systems would lead to the decrease of E a 25 , requiring a lower energy to move the ion due to the decrease of the values of μ and D ; hence it influenced the ionic conductivity.…”

“…As the Gly content increases, it is believed that more protons H + referring to n are supplied due to the dissociation of plasticizer, as proved in the FTIR study from previous work 32 . The increment of n in the SBE systems would lead to the decrease of E a 25 , requiring a lower energy to move the ion due to the decrease of the values of μ and D ; hence it influenced the ionic conductivity. The value of n, μ and D calculated is in reasonable agreement with that obtained by previous work 33 34 35 .…”

“…In order to enhance the ionic conductivity, the addition of plasticiser was studied in this work. According to previous researches 23 24 25 , plasticizers would turn the texture of polymer to become softer and more flexible, and enhance the chemical and mechanical stability of membranes since they could penetrate and increase the distance of molecules and decrease the polar groups of polymer.…”

A Study on Dielectric Properties of The Cellulose Derivative-NH4Br-Glycerol- Based The Solid Polymer Electrolyte System

“…Natural polymer hosts, such as sago, starch, chitosan, and cellulose are suitable to be used [6][7][8][9]. One of the most widely explored candidates as a polymer host is the non-toxic, biocompatible, and biodegradable carboxyl methyl cellulose (CMC) which could be dissolved in water for various purposes [10][11][12][13][14][15].…”