Polyaniline–graphene oxide nanocomposites: Influence of nonconducting graphene oxide on the conductivity and oxidation‐reduction mechanism of polyaniline

Abstract

The present endeavor focuses on the unusual interactions between polyaniline and graphene oxide (PANi–GO) which radically affects the properties of nanocomposites as it is an emerging material for many potential applications. A series of nanocomposites have been synthesized by varying the weight percentage of highly nonconducting GO with respect to aniline which exhibit superior properties in terms of shelf life, processability and conductivity due to the synergistic effect of GO and PANi. A comparison of the resistances of samples reveal that though as‐synthesized GO is insulating (80 MΩ), when added to PANi (283 kΩ) in small amounts yields conducting composites (50–280 Ω). Up to 5 weight % concentration, GO renders conductivity to the composite probably by increasing the doping level of PANi. Nonetheless, no further increase in conductivity observed on addition of more than 5 wt% GO in the composite has dictated us to unravel the structure property relationship between PANi and GO, where GO facilitates the formation of partially reduced phase of PANi, thereby restricting the electronic transport. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 3778–3786

Polyaniline decorated graphene oxide on sulfonated poly(ether ether ketone) membrane for direct methanol fuel cells application

“…High magnification TEM image of PANI-GO indicates bright and dark fringes in different direction (Figure 2E). Similar dark spots morphology for PANI-GO nanocomposite were also observed by Moss et al 37 Furthermore, XRD, FTIR, and TGA analyses also confirms the presence of PANI on hybrid composites and it is shown in Figure 3. From Figure 3A, the sharp characteristic diffraction peak at 2θ = 11.42 (001) for GO crystalline was noted and this confirms the oxidation of graphite to GO.…”

“…The decomposition of the first two phase was resulted from to degradation of water and acidic moieties whereas the final phase degradation was ascribed to the loss of C═O. 37 In PANI-GO nancomposites, two distinct phase degradation along with the marginal shift in T d was noticed. The initial phase of solvent decomposition was observed in the temperature up to 140 C.…”

Graphene Oxide Based Magnetic Nanocomposites with Polymers as Effective Bisphenol–A Nanoadsorbents

“…In the spectra for GO–PANI and GO–PANIm nanocomposites (Figure 13e,f), the characteristic peak of the carboxyl groups at 1730 cm −1 disappeared due to the reaction of these groups with the –NH 2 groups of the polyaniline to form amides that presented a characteristic peak at 1540 cm −1 [64] indicating that PANI was successfully impregnated onto GO [65,66]. The bands at 1143, 1491, and 1564 cm −1 may be attributed to the N−Q−N−Q stretch of the quinonoid (Q) ring, benzenoid ring vibration (C=C stretching deformations), and quinonoid ring vibration (N=Q=N), while the band at 1290 cm −1 is assigned to the C–N stretching vibrations correlated to emeraldine [25,29].…”

Porous (PVDF-HFP/PANI/GO) ternary hybrid polymer electrolyte membranes for lithium-ion batteries

“…Subsequently, GO is widely used in energyrelated applications since its introduction in the last few years; it has shown great interaction with PANI due to its oxygenated functional groups. 32,33 Even though the PANI/GO composite has been reported in several studies, it has never been tested as a PEM or as a separator in a lithium-ion battery. Both PANI and GO have unique properties, and it will be interesting to investigate the effect of the PANI/GO composite on the performance of the PVDF-HFP separator in an LIB.…”