| Summary: | 碩士 === 國立高雄應用科技大學 === 化學工程與材料工程系博碩士班 === 103 === Poly(3,4-ethylenedioxythiophene) (PEDOT) owns favorable properties of high conductivity, hole mobility, low band gap, high stability. However, it also owns the intractable and low processability which have limited its industrial applications. In order to get a better dispersion in organic solvent, PEDOT are synthesized via chemical oxidation polymerization through reverse (EDOT-in-Hexane) micro emulsions in organic solvent. First a ferric tri dodecyl benzene sulfonic (Fe(DBS)3) was prepared as oil phase initiator which is soluble in Hexane, and then added Sodium bis(2-ethylhexyl) sulfosuccinate (AOT) was added as the surfactant which can induce a reverse micelles in the hexane. After introducing EDOT monomer, a PEDOT was obtained which can be well- dispersible in solvent. First, we used Fourier transform infrared spectroscopy (FT-IR) to characterize the functional groups of the PEDOT. The doping level of the PEDOT nanostructures were examined by UV-Vis absorption spectroscopy. The crystalline structure of the PEDOT nanostructures were determined by x-ray diffraction patterns (XRD).The particle size of the PEDOT nanostructures were determined by particle size analyzer. And then, the size and morphology of PEDOT were examined by transmission electron microscopy (TEM) and scanning electron microscope (SEM) techniques. Finally, the conductivity is measured by from a Micro Ohmmeter.
In this study, PEDOT nanostructures are synthesized via chemical polymerization by reverse emulsion polymerization. The PEDOT particles are well-dispersible in hexane solvent and in conductivity was increased from 1.5×10-3 to 2.65 S/cm by the incorporation of benzene sulfonic acid.
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