Study of solid polymer electrolyte based on biodegradable polymer polycaprolactone

Mashadi Sunandar, Evi Yulianti, Deswita Deswita, Sudaryanto Sudaryanto

Abstract


In this research the polymer electrolyte materials based on poly caprolactone (PCL) has been synthesized and characterized. Polycaprolactone is a non-toxic and biodegradable polymer that is environmentally friendly. The preparation of the polymer electrolyte film is carried out by a casting method whereby the PCL polymer is dissolved in a tetrahydrofuran (THF) solvent. Lithium perchlorate salt (LiClO4) as a source of lithium ions then was added to solution with a composition (5-40)% by weight. The solution was evaporated slowly in vacuum oven until the film was formed. The ionic conductivity, crystal structure, morphology and thermal properties of the polymer electrolyte were characterized by impedance spectroscopy X-ray diffraction (XRD) and Infrared Spectrometer (FTIR, Scanning Electron Microscope (SEM). and Differential Scanning Calorimeter (DSC) respectively. The results of the conductivity measurements showed that the PCL conductivity increased from 3.45 x 10-11 Scm-1 to 5.52 x 10-6 Scm-1 with a 30% weight salt content of LiClO4. Observations with XRD show a more amorphous polymer with more salt addition and FTIR results show that there is interaction between active groups on polymers with salt. The thermal properties show that the melting points of polymer become lower with more salt addition.

 


Keywords


biodegradable polymer; polycaprolactone; polymer electrolyte; LiClO4

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DOI: https://doi.org/10.11113/mjfas.v15n3.1185

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