Physical and Chemical Characterization of commercial kappa-carrageenan with Ammonium Chloride as electrolyte in organic battery application
Anisah (a*), V K Sari (a), M A F Turnip (b), P Wulandari (b) and P S Rudati (c)*

a) Physics of Magnetism and Photonic Research Division, FMIPA, ITB, Bandung
*24722003[at]mahasiswa.itb.ac.id
b) Department of Electrical Engineering, Politeknik Negeri Bandung

Abstract

In this research, we attempt to investigate the difference in physical and chemical characteristics between commercial kappa-carrageenan before and after purification process as electrolyte in organic battery application. Kappa-carrageenan was used as a host polymer to prepare biopolymer electrolyte films and ammonium chloride was used to enhance the charge transport process in electrolyte layer of the organic battery. Both of commercial kappa carrageenan before and after purification process were prepared in the same way in the de-ionized water as solvent together with the addition of ammonium chloride at same concentration. After the gel of kappa-carrageenan was formed then it was dropped casting on the plate and dried to take out the solvent and finally the thin film of kappa-carrageenan was ready for further used. We characterized the physical and chemical properties of kappa-carrageenan before and after purification by use of UV-Vis spectroscopy, tensile-test measurement, Fourier transform infrared spectroscopy and Raman spectroscopy in the form of solution and thin film samples. The results show that the absorbance spectra of
commercial kappa-carrageenan before purification have maximum peak at 288 nm while after purification process the maximum peak of kappa-carrageenan is shifted to high wavelength at 294 nm. On the other side, the FTIR transmittance spectra and Raman spectra show no structural differences between kappa-carrageenan with or without addition of ammonium chloride. In our case, the surface morphology of the thin film of kappa-carrageenan before purification has rougher surface than the surface of purified kappa-carrageenan. While tensile test measurements indicate that kappa-carrageenan before purification is more flexible for use in organic battery manufacturing than purified kappa-carrageenan.

Keywords: kappa-carrageenan- purified- electrolyte- organic battery

Topic: Material Physics