The Effect of Carboxymethyl Cellulose as Bio Filler on Ionic Conductivity and Physical Property of Waste Cooking Oil Based Polyurethane Composite Polymer Electrolyte

Abstract:

Waste cooking oil (WCO) is an under-utilized, highly abundant raw material from food industry. In this study, WCO was used to prepare solid polymer electrolyte (SPE) films via solvent-free method. WCO was first pretreated and converted into polyol using epoxidation and hydroxylation reaction. Then, WCO-based polyol was combined with diisocyanate, LiCF₃SO₃ and carboxymethyl cellulose (CMC) to obtain polyurethane SPE films. CMC was added to SPE as bio-filler to observe the effect on ionic conductivity and mechanical properties of SPE. SPE films were characterized using Fourier transformed infrared spectroscopy, electrochemical impedance spectroscopy, x-ray diffraction spectrometer (XRD), differential scanning calorimetry and tensile strength. Addition of CMC resulted in increase of ionic conductivity up to 1.19 x 10^-5 S/cm for 15% CMC. The ionic conductivity supported with reduced crystalline peaks intensity in XRD to show that the amorphous nature of SPE increased as more CMC added. Tensile strength also increased with addition of CMC and peaked at 10% CMC (34.17 MPa) due to effective hydrogen bond interaction between CMC and PU or salt. However, increased CMC amount further to 15% reduced tensile strength due to agglomeration of CMC particles. As a conclusion, addition of CMC is a viable method to improve both ionic conductivity and mechanical property of SPE.

• Periodical: Key Engineering Materials (Volume 797)
• Pages: 280-288
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.797.280
• Online since: March 2019
• Authors: Syuhada Mohd Tahir*, Norhatikah Alias
• Keywords: Biofiller, Carboxymethyl Cellulose, Composite Polymer Electrolyte, Ionic Conductivity, Polyurethane, Waste Cooking Oil

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