In-situ synthesis and characterization of electrically conductive polypyrrole/graphene nanocomposites

Bose, Saswata; Kuila, Tapas; Uddin, Md. Elias; Kim, Nam Hoon; Lau, Alan Kin Tak; Lee, Joong Hee

doi:10.1016/j.polymer.2010.10.014

Cited by 483 publications

(261 citation statements)

References 32 publications

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“…As PPy is hygroscopic, nearly 7.9 wt% weight loss has occurred at 100°C, due to the evaporation of residual water while only 2 wt% weight loss for PPy/ASPB nanocomposite. As the temperature increases, the main mass loss of PPy and PPy/ASPB nanocomposite starts at about 250°C corresponding to PPy degradation [36]. In case of PPy, the weight reduces largely with only one endothermic peak at 286°C observed in Figure 7b.…”

Section: Measurements Of Electrical Conductivitymentioning

confidence: 95%

Synthesis and characterization of polypyrrole doped with anionic spherical polyelectrolyte brushes

Na¹,

Li²,

Yuan³

et al. 2012

Express Polym. Lett.

168

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Abstract. The procedures for the synthesis of polypyrrole (PPy) doped with anionic spherical polyelectrolyte brushes (ASPB) (PPy/ASPB nanocomposite) by means of in situ chemical oxidative polymerization were presented. Fourier transform infrared spectroscopy (FTIR) and Raman spectroscopic analysis suggested the bonding structure of PPy/ASPB nanocomposite. Scanning electron microscopy (SEM) was used to confirm the morphologies of samples. The crystallographic structure, chemical nature and thermal stability of conducting polymers were analyzed by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Thermo-gravimetric analysis (TGA) respectively. Investigation of the electrical conductivity at room temperature showed that the electrical conductivity of PPy/ASPB nanocomposite was 20 S/cm, which was higher than that of PPy (3.6 S/cm).

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Section: Measurements Of Electrical Conductivitymentioning

confidence: 95%

Synthesis and characterization of polypyrrole doped with anionic spherical polyelectrolyte brushes

Na¹,

Li²,

Yuan³

et al. 2012

Express Polym. Lett.

168

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“…GO was prepared according to the modified Hummers method 40 . In a typical procedure, graphite (1.0 g) was mixed with 23 mL of H 2 SO 4 (95%) and the mixture was stirred for 30 min within an ice bath.…”

Section: Graphene Oxide Synthesismentioning

confidence: 99%

Formation of Cellulose Acetate–Graphene Oxide Nanocomposites by Supercritical CO₂ Assisted Phase Inversion

Baldino

Sarno

Cardea

et al. 2015

Ind. Eng. Chem. Res.

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(Stefano Cardea) Phone Number: +39089969365; msarno@unisa.it (Maria Sarno) Phone Number: +39089964057.KEYWORDS: Graphene oxide, Cellulose acetate, Nanocomposite, Supercritical CO 2 . ABSTRACTCellulose acetate (CA)/graphene oxide (GO) nanocomposite membranes were generated by an assisted phase inversion process, based on the use of SC-CO 2 as non-solvent, operating at 200 bar and 40 °C; loadings of GO up to 9% w/w were tested. The structures maintained the cellular morphology, characteristics of CA membranes, also at the highest GO loadings used, with a porosity of about 80%, but the presence of GO influenced the pore sizes, that ranged between about 9 and 16 µm. The starting GO and the nanocomposite structures were characterized by the combination of various techniques that evidences as Sulphur and Chlorinated impurities, that were present in the starting GO material, were completely eliminated by the interaction with SC-CO 2 during structures formation; moreover, a partial reduction of GO to graphene was also observed. . Compared to graphene, GO is heavily oxygenated and its basal plane carbon atoms are decorated with epoxide and hydroxyl groups and its edge atoms with carbonyl and carboxyl groups. Hence, GO is highly hydrophilic and the presence of these functional groups reduces interplanar forces, which can improve the interfacial interaction between GO and some polymers and, thus, the dispersion of GO in polymer matrices 2,3 . Many factors can affect the final properties and applications of GO/polymer nanocomposites 4 , among these: kind of GO used, its dispersion state in the polymeric matrix and interfacial interactions, the amount of wrinkling, its network structure in the matrix and its purity.Various attempts have been proposed in the literature to realize GO/polymers composite structures [5][6][7][8][9][10][11][12][13][14][15] . The processes proposed until now (i.e., phase inversion, casting, electrospinning) present several limitations; for example, residues of organic solvents of GO synthesis are typically found at the end of these processes, causing problems, in particular, for biomedical applications. Moreover, a homogeneous distribution of GO in the polymeric matrix is difficult to obtain, since the cohesive forces among GO layers tend to produce restacking. GO composites performance is strongly related to its level of exfoliation (i.e., separation of the layers). Exfoliated GO allows the largest interfacial contact with the polymer matrix, improving the properties of the composites. For this reason, several techniques have been implemented to increase the GO exfoliation degree. In particular, solvent-based exfoliation and thermal exfoliation techniques emerged as two preferred routes for this step [16][17][18][19] . [30][31][32][33] . Due to molecular size of CO 2 and its polarizability, it has the potential to pass through the solid porous layers 34 and, when supercritical conditions are reached, CO 2 diffusivity can favor layers expansion and exfoliation [31][32][33] . It is also possible to...

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“…The electrical conductivity of the samples was calculated with the help of Equations (2) and (3) [28]:…”

Section: Electrical Conductivitymentioning

confidence: 99%

Polyaniline integrated carbon nanohorn: A superior electrode materials for advanced energy storage

Maiti¹,

Khatua²

2014

Express Polym. Lett.

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Abstract. Fiber-like polyaniline (PANI)/carbon nanohorn (CNH) composites (PACN composites) were prepared as electrode materials for supercapacitor by simple method that involves in-situ polymerization of aniline in the presence of CNH in acidic (HCl) medium with noteworthy electrochemical performances. Thus, the prepared PACN composites show high specific capacitance value of ! 834 F/g at 5 mV/s scan rate compared to ! 231 F/g for pure PANI and CNH (! 145 F/g) at same scan rate of 5 mV/s. CNHs are homogeneously dispersed throughout the matrix and coated successfully. Thus, it provides more active sites for nucleation and electron transfer path. In addition, the composites show high electrical conductivity in the order of ! 6.7·10 -2 S·cm -1 which indicates the formation of continuous interconnected conducting network path in the PACN composites. Morphological study of the PACN composites was carried out by high resolution transmission electron microscopy (HRTEM) and field emission scanning electron microscopy (FESEM).

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In-situ synthesis and characterization of electrically conductive polypyrrole/graphene nanocomposites

Cited by 483 publications

References 32 publications

Synthesis and characterization of polypyrrole doped with anionic spherical polyelectrolyte brushes

Synthesis and characterization of polypyrrole doped with anionic spherical polyelectrolyte brushes

Formation of Cellulose Acetate–Graphene Oxide Nanocomposites by Supercritical CO₂ Assisted Phase Inversion

Polyaniline integrated carbon nanohorn: A superior electrode materials for advanced energy storage

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In-situ synthesis and characterization of electrically conductive polypyrrole/graphene nanocomposites

Cited by 483 publications

References 32 publications

Synthesis and characterization of polypyrrole doped with anionic spherical polyelectrolyte brushes

Synthesis and characterization of polypyrrole doped with anionic spherical polyelectrolyte brushes

Formation of Cellulose Acetate–Graphene Oxide Nanocomposites by Supercritical CO2 Assisted Phase Inversion

Polyaniline integrated carbon nanohorn: A superior electrode materials for advanced energy storage

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Formation of Cellulose Acetate–Graphene Oxide Nanocomposites by Supercritical CO₂ Assisted Phase Inversion