Study of the electroconductive properties of conductive polymers‐graphene/graphene oxide nanocomposites synthesized via in situ emulsion polymerization

Abstract

The present study introduces a modified approach to synthesize polyaniline (PANI) and polypyrrole (PPy) doped with graphene oxide (GO) or graphene (GN) through an in situ emulsion polymerization (EP) technique. Dodecyl benzene sulfonic acid (DBSA) was used as a surfactant and doping agent as well during the polymerization reaction. The morphology and microstructure of the synthesized polymers and their nanocomposites were studied by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy, and thermogravimetric analysis. All of these characterization techniques confirmed the superior morphology and thermal properties of the nanocomposites. The electroconductive properties of the synthesized polymers and their nanocomposite pellets containing 5 wt% of either GN or GO pressed at pressures of 2, 4, and 6 tons were investigated with a four‐probe analyzer. Nanocomposites showed very high electrical conductivity compared to individual PANI and PPy samples pressed at the same pressures. The addition of GO and GN not only improved the thermal stability but also significantly enhanced the electrical conductivity of the nanocomposites. Thus, the present work signifies the importance of the direct loading of GO and GN into conductive polymers during the EP process using DBSA as a surfactant to achieve nanocomposites with promising properties for various semiconductive applications. POLYM. COMPOS., 39:2142–2150, 2018. © 2016 Society of Plastics Engineers

Constructing reduced graphene oxide and polypyrrole coatings on glass fiber to enhance its absorbing performance

“…Besides, the XPS survey spectra (Figure 1j,k) with the N element peak in the full spectra was also can be used to certify the existence of PPy coating due to the non‐N element for the original GFs. And the fitted N 1S peaks at 400, 401, and 402 eV can be attributed to NH, NH + , NH + , further demonstrating the successful synthesis of PPy coating 18 …”

Dispersive solid‐phase extraction adsorbent of methamphetamine using in‐situ synthesized carbon‐based conductive polypyrrole nanocomposite: focus on clinical applications in human urine

“…The X-ray diffraction pattern of NGO and NGPPC was investigated (Figure 2b). The peaks at 2θ = 11 and 26 • are referred to the inter-planar spacing increase of oxidation treatment and residual unoxidized graphite, respectively [31]. Presence of a slightly broad peak at 2θ = 11.5 • is related to characteristic peak of pyrole in NGPPC structure which proves the incorporation of pyrrole in NGO structure.…”

“…Peak at 1703 cm −1 is referred to carboxylic C=O functional group of NGO. The peaks at 2θ = 11 and 26 • are referred to the inter-planar spacing increase of oxidation treatment and residual unoxidized graphite, respectively [31]. FTIR spectrum of NGPPC was studied.…”

In Situ Emulsion Polymerization to Multifunctional Polymer Nanocomposites: A Review

“…Kim et al. [ 64,65 ] reported a similar in situ emulsion polymerization to prepare PANI and PPy nanocomposites containing 5 wt% of GO with outstanding electrical properties. In this study, they simultaneously applied dodecyl benzene sulfonic acid (DBSA) as an emulsifier and protonating agent to initiate the formation of PANI and PPy during the polymerization reaction.…”

“…The PPy nanowires will deposit onto the GO surface because of the 𝜋-𝜋 interaction and electrostatic interaction between PPy and the unoxided domain of GO sheets, resulting in to the formation of layered PPy/GO composite with excellent electrical conductivity. Kim et al [64,65] reported a similar in situ emulsion polymerization to prepare PANI and PPy nanocomposites containing 5 wt% of GO with outstanding electrical properties. In this study, they simultaneously applied dodecyl benzene sulfonic acid (DBSA) as an emulsifier and protonating agent to initiate the formation of PANI and PPy during the polymerization reaction.…”