The length of reaction time on the synthesis of poly (3,4-ethylenedioxythiophene)

Abstract

Poly(3,4-ethylene dioxythiophene) (PEDOT) has been synthesised via the oxidative polymerisation method of 3,4-ethylenedioxythiophene (EDOT) monomer using Na2S2O8 and Fe2(SO4)3 as oxidising agents. The synthesis was carried out at various times of reaction, i.e for 6, 12, and 24 hours. The success of PEDOT synthesis was proven by FTIR spectra which indicated by the loss of the C-H group presented in the 890 cm−1 absorption area from EDOT monomer. The morphology of PEDOT particles was observed by Scanning Electron Microscopy (SEM). The results showed that the differences in the synthesis time of 6, 12, and 24 hours affected the diameter of PEDOT particles. The size morphology of those 6, 12, and 24 hours synthetically PEDOT particles were 38.64 ± 18.21 nm, 55.91 ± 15.31 nm, and 66.62 ± 18.92, respectively. The largest diameter product of PEDOT in this study was then doped with carrageenan to synthesis PEDOT/Carr dispersions via the post-polymerisation method. This study concluded that the size of PEDOT particles is significant with increasing time of reaction, and the product of PEDOT/Carr dispersions is promising as a green polymer.