Nanocomposites of poly(3,4-ethylenedioxythiophene) and montmorillonite clay: synthesis and characterization

Abstract

Poly(3,4-ethylenedioxythiophene) (PEDOT)/montmorillonite (MMT) clay nanocomposites were prepared for the first time, by exchanging exchangeable cations in the MMT interlayer with Ce(IV) followed by insertion of ethylenedioxythiophene monomer to result in spontaneous polymerization to give PEDOT—Ce(III)—MMT nanocomposites. The nanocomposites thus prepared were characterized by electrochemical methods, elemental analysis, X-ray diffraction (XRD), Fourier transform infrared spectroscopy, thermogravimetric analysis, differential scanning calorimetry, and in situ conductivity measurements. Cyclic voltammograms of PEDOT—Ce(III)—MMT in 0.1 M H2SO 4 on glassy carbon electrode shows characteristics redox behavior that appear in Ce(IV)/Ce(III) and in Ce(IV)—MMTunder identical conditions together with typical electrochemical behavior of PEDOT. Further XRD results confirm that PEDOT has been intercalated within the MMT interlayer and the electrochemical impedance spectroscopy analysis implies that the organics are in their electronically conducting polymer form with significant electronic conductivity. As such, these nanocomposites may find applications in rechargeable batteries and photovoltaic devices as electrode materials and as antistatic coatings for electrical appliances.

Clay incorporation at the dielectric layer of multilayer polymer films for electrochemical activation

“…39 Unfortunately, PEDOT-MMT nanocomposites prepared by Letaïef et al 33 and Rajapakse et al 36 showed an intercalative structure rather than the more desirable exfoliated organization.…”

“…9,[31][32][33][34][35] Some hybrid PEDOT-clay nanocomposites based on montmorillonite (MMT), which is a smectite group mineral clay that belongs to the general family of 2:1 layered silicates, have been reported in the last few years. 9,33,[36][37][38] Since exfoliated CP-MMT nanocomposites usually have better properties (e.g.…”

Organo-montimorillonites containing a reactive thiophene group for polythiophenes nanocomposites

“…For example, nanocomposites of polypropylene (PP) and polyethylene (PE), presenting both intercalated and exfoliated structures, have been obtained with clays modified by polymeric surfactants [4,5]. Nanocomposites of p-conjugated polymers and MMT have also been studied [6][7][8]. Among them are those of polythiophenes, a family of conductive polymers presenting functional groups which make them candidates for diverse applications such as microelectronic devices [9], catalysts [10], chemical and biosensors [11,12], among others.…”

Ion Transfer Mechanisms Accompanying p-Doping of Poly(3,4-Ethylenedioxythiophene) Films in Deep Eutectic Solvents

“…Monomeric EDOT can be oxidatively polymerized by both electrochemical and chemical methods, in each case yielding a p-doped polymer with high conductivity (up to 500 S cm −1 ) [1,2]. PEDOT has been explored as the active or support material in a variety of applications encompassing charge storage devices [3], micro-electrochemical [4] and organic thin film [5] transistors, antistatic coatings [6], photovoltaic energy conversion [7], electrochromic and optical display devices [8,9], corrosion protection coatings [10], drug delivery [11], biosensors [12], electrocatalysis [13], memory devices [14], fluid handling devices [15] and mechanical actuators [16].…”