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Effect of Different Dielectric Constant Solvents Addition on PEDOT-PSS Conductive Polymer and its Application

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Abstract:

This paper investigates the physical properties of conductive paste which is used for print engineering. The conductivity of poly (3,4-ethylenedioxythiophene) (PEDOT) doped with poly(4-styrenesulfonate) (PSS) containing various organic solvents was measured. The different dielectric constant solvents are isopropanol, N-methyl-2-pyrrolidone, N,N-dimethyl acetamide, dimethyl sulfoxide with different concentration. After drying, they were prepared many kinds of films. It was found that an addition of organic solvent lowered the resistance by two or three orders of magnitude when the concentration is 25wt% , among them the larger dielectric constant solvent has the best surface conductivity, the magnitude is about 7.03×10－1 S/cm, and then we blend every two solvents by 25wt% concentration, prepared six blend films. Among them has the best effect, the magnitude is about 1.94×10-1S/cm. All kind of PEDOT/PSS films have been studied using four point probe conductive meter, X-ray diffractometry (XRD), fourier transform infrared (FTIR), thermogravimetric analysis(TGA) in order to discuss the surface conductivity, the crystallinity, the chemical structure and the thermal properties of the PEDOT/PSS film. Conducting PEDOT/PSS-IPA/DMSO solution mix with polymethyl-methacrylate (PMMA) resin to coat hydrophobic fabrics, which can be used for the dissipation of electrostatic charge.

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Periodical:

Materials Science Forum (Volume 687)

Pages:

625-633

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.687.625

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Online since:

June 2011

Authors:

Chin Jung Lee, I Shou Tsai

Keywords:

Dielectric Constant, Electrostatic Discharge (ESD), Hydrophobic Fabrics, Poly(3,4-Ethylenedioxythiophene)/Poly(4-Styrenesulfonate), Surface Resistance

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© 2011 Trans Tech Publications Ltd. All Rights Reserved

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