PPy Loading Research Articles

Polypyrrole modified MIL-101-Fe-derived Fe/Fe3O4@C composites for high-performance microwave absorber

Carbon-based microwave absorbing composites with magnetic-dielectric properties and multiple loss mechanism are considered to be an effective choice for solving electromagnetic pollution. In this paper, the PPy/Fe/Fe3O4@C composite was synthesized from MIL-101-Fe derivatives and subsequently coated polypyrrole (PPy) by combining hydrothermal, high-temperature pyrolysis and oxidative polymerization. The effects of pyrolysis temperature and PPy loading on components, microstructures and electromagnetic parameters were investigated. The results showed that the PPy/Fe/Fe3O4@C composite consisted of two-dimensional carbon flakes modified by magnetic particles and laminated conductive polymers. When the PPy loading is moderate, the composite reaches a minimum reflection loss (RLmin) of −61.38 dB at a 3.1 mm thickness and effective absorption bandwidth (EAB) of 5.81 GHz at the thickness of 2.2 mm. After pyrolysis, the unique three-dimensional structure of carbon sheet stacking, as well as the heterogeneous interface and conductive networks generated by the modification of magnetic particles Fe and Fe3O4 and conductive PPy, are beneficial to improve the dielectric and magnetic losses to optimize the impedance matching. These conductive polymer-modified magnetic-dielectric composites have potential for development and application in microwave absorption.

Photo/Thermo Dual Stimulus-Responsive Liquid Marbles Stabilized with Polypyrrole-Coated Stearic Acid Particles.

In this study, we report on the fabrication of photo/thermo dual stimulus-responsive liquid marbles (LMs) that can be disrupted by light irradiation and/or heating. To stabilize the LMs, we synthesized micrometer-sized stearic acid (SA) particles coated with overlayers of polypyrrole (PPy) by aqueous chemical oxidative seeded dispersion polymerization. The SA/PPy core-shell particles could adsorb at the air-water interface to stabilize LMs by rolling water droplets on the particle powder bed. The presence of SA, known as a phase-change material, which undergoes a transition from solid to liquid by heating, and PPy, which can transduce light to heat, gives rise to the photo and thermo dual stimulus-responsive characters of the LMs. The disruption of the LMs could be induced in a cascade manner: light irradiation on the LM induced a temperature increase, followed by melting of the SA component on the LM surface, leading to its disruption and release of the inner water. The disruption time is linked to the PPy loading and light irradiation power, and it can be tuned from quasi-instantaneous to a few tens of seconds. The melting of SA due to a light-induced phase change from the solid to liquid state is a new mechanism to trigger the disruption of LMs. We finally demonstrated two applications of the LMs as a light-responsive microreactor and a sensor.

Adsorption of sulfamethoxazole on polypyrrole decorated volcanics over a wide pH range: Mechanisms and site energy distribution consideration

• SED theory was firstly applied for SMX adsorption on mineral adsorbent. • pH application range of volcanic rock was broadened to 5–11. • The different adsorption ability and mechanism between VR and PPy-VR was analyzed. • High-energy adsorption centers of PPy-VR was related to π-π EDA and ion exchange. As a widely used antibiotic, sulfamethoxazole (SMX) has attracted increasing research attention. However, acidic condition was normally required for efficient SMX removal, and the energy variation of adsorption system is not fully elucidated. In this study, based on a typical mineral adsorbent of volcanic rock (VR), anion exchange was introduced by Polypyrrole (PPy) modification to overcome the electrostatic repulsion in alkaline environment, and site energy distribution (SED) theory was applied to explore adsorption behavior and mechanism on SMX from an energy perspective. The batch adsorption experiments and a series of complementary characterization were combined, confirming that pore filling and hydrogen bonding are the dominant adsorption mechanisms for SMX removal by VR. While the adsorption distinction between PPy supported VR (PPy-VR) and VR could be explained by electrostatic attraction, π-π electron donor-acceptor interaction (π-π EDA) and ion exchange, which further explained the wide pH application potential of modified sorbent. Moreover, Dubinin-Ashtakhov (DA) model was used to calculate the energy distribution, and PPy-VR exhibited a stronger adsorption affinity ( E m = 8.55–11.57KJ/mol) and energy heterogeneity ( δ e *=2.15–2.57) for SMX. The high-energy adsorption centers increased significantly (92.63%) after modification, which mainly attributed to π-π EDA and ion exchange introduced by PPy loading. The surface modification method provides a feasible idea for the improvement of application environment of adsorbents, and the analysis of SED is expected to promote the understanding of the connection between site energy and adsorption mechanism.

PPy nanotubes-enabled in-situ heating nanofibrous composite membrane for solar-driven membrane distillation

• A superhydrophobic photothermal composite membrane was demonstrated. • PDMS binder enhanced the structural stability and hydrophobicity of dual-layer membrane. • The PPy NTs/PVDF nanofibrous composite membrane showed outstanding solar-driven DCMD performance. Solar-driven membrane distillation is an emerging desalination technology with low energy consumption and efficient vapor collection, but the low vapor flux and limited efficiency hinders its practical application. Here, we demonstrated an innovative photothermal composite membrane by depositing polypyrrole nanotubes (PPy NTs) as functional coating layer onto an electrospun poly (vinylidene fluoride) (PVDF) nanofibrous support layer via vacuum filtration stabilized by adhesive polydimethylsiloxane (PDMS). According to the proportional relationship between the fibrous materials diameter and the pore size, the large-scale surface gaps between adjacent nanofibrous could be replaced by smaller pores from the PPy NTs layer on the PVDF substrate. The PDMS with low surface energy was used as an adhesive to in-situ solder the loose PPy NTs together as well as to enhance the adhesion between the PPy layer and the PVDF substrate to form an integrated and robust dual-layer composite membrane with superhydrophobicity, high porosity and controllable pore size. By exploring the optimal match of PPy loading and PDMS concentration, the solar-to-thermal performance and structural stability could be significantly improved. With 1 sun irradiation, the selected composite membrane thus showed a high-water vapor flux of 1.3 kg/(m 2 ·h) and a photothermal conversion efficiency of 81.6%, specially, the membranes maintained stable permeate conductivity during the 10 h solar-driven DCMD seawater desalination test. These results indicated that the photothermal dual-layer superhydrophobic composite membranes has promising potential for desalination with the help of sustainable energy sources such as sunlight.

Janus Polypyrrole Nanobelt@Polyvinyl Alcohol Hydrogel Evaporator for Robust Solar-Thermal Seawater Desalination and Sewage Purification.

The state-of-the-art solar-thermal evaporators demonstrating high energy utilization efficiency, a high evaporation rate, and salt rejection are highly desirable in solar-driven low-energy water purification/harvesting. Herein, a novel Janus solar evaporator is constructed by loading polypyrrole (PPy) nanobelts on the polyvinyl alcohol (PVA) hydrogel. The PPy nanobelts present a high solar absorption of 98.3%, leading to a localized solar-thermal efficiency of 82.5% when insulated from bulk water by the PVA hydrogel. The porous PVA hydrogel and the hydrophilic PPy nanobelts enable the efficient three-dimensional water transport. Taking advantages of the synergistic effect in the water-energy nexus, the Janus PPy nanobelt@PVA hydrogel evaporator evaporates water with a high rate of 2.26 kg m-2 h-1 via 80.1% solar energy from 1 sun irradiance with a low PPy loading of ∼3 mg cm-2 even at a rate of 2.64 kg m-2 h-1 via 96.3% solar energy for a biomimetic conical evaporator. The Janus evaporator presents superior salt-resistant desalination and contaminant purification performance in seawater and sewage. Furthermore, a portable solar-thermal purifier equipped with the Janus evaporator desalts real seawater far above the drinking water standard with over a 99.9% salt rejection rate and eliminates 95.8% of chemical oxygen demand in real sewage, highlighting its potential for advanced clean water harvesting.

Effect of Polypyrrole on the Electrical, Dielectric and Mechanical Properties of Waterborne Epoxy Coatings

In this context, conducting composite based on waterborne epoxy system and polypyrrole (PPy) was investigated. The polypyrrole was synthesized by chemical oxidation polymerization. Its morphology and chemical structure were confirmed by using field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FTIR). Then, PPy was well-dispersed in the epoxy coating and had a good compatibility with the matrix. The effects of PPy on dielectric, electrical and mechanical properties of epoxy/PPy composites was examined. The dielectric constant and electrical conductivity of the coatings increased with addition of PPy fillers. Over to 15 wt. % of PPy loading, the volume resistivity of samples slightly decreased from 6.7 × 1010 to 1.5 × 1010 Ω cm. In contrast, the presence of PPy diminished both impact and abrasion resistance of the epoxy/PPy composites, down to 160 kg cm and 10.2 L/mil, respectively, but they stayed acceptable for the coatings. The results reveal that the epoxy containing polypyrrole is suitable for various electrical and dielectric applications.

Effect of Deposition Parameters on Electrochemical Properties of Polypyrrole-Graphene Oxide Films.

Graphene oxide (GO)-modified polypyrrole (PPy) coatings were obtained by electrochemical methods in the presence of the anionic surfactant, sodium dodecyl sulfate (SDS). The structure, morphology, and electrochemical properties of the coatings were assessed by Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM) and cyclic voltammetry at varying scan rates, respectively. The properties of the obtained coatings were analyzed with the GO and PPy loadings and electrodeposition mode. The hybrid coatings obtained galvanostatically showed a coarser appearance than those deposited by cyclic voltammetry CV mode and improved performance, respectively, which was further enhanced by GO and PPy loading. The capacitance enhancement can be attributed to the SDS surfactant that well dispersed the GO sheets, thus allowing the use of lower GO content for improved contribution, while the choice of suitable electrodeposition parameters is highly important for improving the applicability of GO-modified PPy coatings in energy storage applications.

Polypyrrole decorated metal-organic frameworks for supercapacitor devices.

Due to their large specific surface areas and porosity, metal–organic frameworks (MOFs) have found many applications in catalysis, gas separation, and gas storage. However, their use as electronic components such as supercapacitors is stunted due to their poor electrical conductivity. We report a remedy for this by combining the MOF structure with polypyrrole (PPy), a well-known conductive polymer. Three MOFs are studied for modification to this end: CPO-27-Ni and CPO-27-Co (M2DOBDC, M = Ni2+, Co2+, DOBDC = 2,5-dihydroxy-1,4-benzenedicarboxylate) and HKUST-1 (Cu3(BTC)2, BTC = 1,3,5 benzenetricarboxylate). The gravimetric capacitance of pure MOFs is boosted several orders of magnitude after reinforcement of PPy (e.g., from 0.679 to 185 F g−1 for HKUST-1 and PPy–HKUST-1, respectively), and is much higher than reported for pure PPy. In total, these PPy-d-MOFs exhibit specific capacitances up to 354 F g−1, retaining 70% of this value even after 2500 cycles. Among them, the highest capacitance is found for PPy–CPO-27-Ni (354 F g−1), followed by PPy–CPO-27-Co (263 F g−1) and PPy–HKUST-1 (185 F g−1). The maximum operating potential for these electrodes is 0.5 V, which is restricted by the contact of MOF with aqueous electrolyte and with extremely low PPy content. As a solution, higher PPy loading and rational adjustment of particle size and porosity of both MOF and PPy are recommended so that the MOF/electrolyte interface is limited, leading to more robust electrode. The work completed here describes a highly promising approach to tackling the electrically insulating nature of MOFs, paving the way for their use in electrochemical energy storage devices.

NiS2@rGO Nanosheet Wrapped with PPy Aerogel: A Sandwich-Like Structured Composite for Excellent Microwave Absorption.

To reduce electromagnetic pollution as well as increase the accuracy of high-precision electronic equipment, more attention has been paid to new electromagnetic wave (EMW) absorbing materials, which have the advantages of strong absorption, wide absorption bands, and a narrow thickness. In this study, a novel ternary type of the NiS2@rGO/polypyrrole (PPy) sandwich-like structured composites was synthesized via a facile two-step method, in which the hydrothermal method was used to prepare NiS2@rGO binary composites and then the in situ polymerization method was used to synthesize the PPy, which acted as the outer layer of the sandwich-like structure. The morphologies and electromagnetic absorption performance of the NiS2@rGO/PPy were measured and investigated. A sample with 6 wt% NiS2@rGO/PPy loading paraffin-composite obtained an outstanding reflection loss (RL) of −58.7 dB at 16.44 GHz under a thickness of 2.03 mm. Simultaneously, the effective electromagnetic wave absorption bandwidth for RL < −10 dB, which covered 7.04 to 18.00 GHz (10.96 GHz), was achieved by changing the thickness of the absorber from 2.0 to 3.5 mm. The results not only suggest that the NiS2@rGO/PPy composite has excellent performance in the field of EMW absorption but also prove that the novel sandwich-like structure can contribute to appropriate impedance matching through multiple relaxation and interfacial polarization processes.

Flexible and freestanding electrodes based on polypyrrole/carbon nanotube/cellulose composites for supercapacitor application

In this study, freestanding paper-like composite films were fabricated using a simple, but scalable and efficient, approach: an environmentally friendly freeze-and-thaw process giving a porous fibrous matrix of cellulose and functionalized carbon nanotubes (f-CNTs), followed by in situ chemical polymerization for the incorporation of polypyrrole (PPy). A homogeneous porous fibrous matrix was formed as a result of strong hydrogen bonding between the f-CNTs and the regenerated cellulose; this material served as an excellent template for the uniform coating of PPy. The structural, morphological, thermal, and electrochemical properties of the as-prepared PPy/f-CNT/cellulose composite films were investigated to evaluate their potential for use as flexible, lightweight, and inexpensive freestanding electrode materials within flexible supercapacitors. The unique microstructure—with high electrical conductivity, good wettability, and a porous architecture—provided large interfacial areas for the storage/release of charge carriers and for the facile diffusion of electrolyte ions in the prepared composite electrodes. With these attributes, the freestanding electrode having the optimal PPy loading exhibited not only an excellent areal capacitance (2147 mF cm−2 at a current density of 1 mA cm−2) but also a good rate capability and an outstanding cycling stability. Moreover, the flexibility, environmental friendliness, and biodegradability of the PPy/f-CNT/cellulose composite films suggest that they will be suitable for use as green and sustainable electrode materials within flexible supercapacitors.

Carbonized cotton fabric in-situ electrodeposition polypyrrole as high-performance flexible electrode for wearable supercapacitor

A polypyrrole/carbonized cotton fabric (PPy/CCF) flexible bind-free electrode was firstly created by simple carbonization and in-situ electrodeposition method for supercapacitors. The PPy/CCF-1:2 not only exhibits a high specific capacitance of 3596 mF cm−2 at a current density of 2 mA cm−2, which is almost 9 times higher than the pristine CCF (420 mF cm−2), but also shows good rate capability and high stability with 96.5% capacitance retention after 4000 cycles. The excellent electrochemical properties can be attributed to CCF substrate with a hierarchical 3D porous structure, which can provide conductive pathways for fast electron transfer and large accessible area for PPy loading. Meanwhile, PPy with hornlike microstructure can shorten ion diffusion paths, and ensure adequate contact area between the electrode and the electrolyte, leading to an dramatical increase in the specific capacitance and fast charge/discharge capability of the hybrid electrodes. In addition, the assembled flexible supercapacitor possesses a high volumetric energy density of 1.18 mWh cm−3 at power density of 17 mW cm−3, expressing no any decline in the capacitance under different bending situations. This device can be easily sewn into a garment for powering an electronic watch, with the low-cost, lightweight and easy fabrication features, which will be considerate as a promising candidate for wearable energy storage device.

Aramid fibre-based wearable electrochemical capacitors with high energy density and mechanical properties through chemical synergistic combination of multi-coatings

Fibrous electrochemical capacitors (FECs) with outstanding wearability, mechanical properties and satisfactorily high energy density are greatly required for developing wearable smart devices and sustainable energy sources. Herein, new high performance FECs based on flexible but insulating aramid fibres (KFs) were developed through chemically grafting composite coatings of Ag nanoparticles, carbon nanotubes (CNTs) and capacitive polypyrrole (PPy), successively. Their structures and integrated performances were intensively studied. The PPy loading plays an important role on the capacitive properties of new KFs, and there is an optimum content of PPy for getting the best integrated performances. It is interesting to find that the capacitive property of KF/Ag/CNT/PPy is not the simple combination but much higher than those of KF/Ag/PPy and KF/CNT/PPy, proving that there is a synergistic effect between Ag and CNT coatings. This synergistic effect endows KF/Ag/CNT/PPy fibres with high specific capacitance and large energy density. For example, the specific capacitance and energy density of the novel aramid fibre capacitor with the optimum content of PPy (KF/Ag/CNT/PPy0.2) are as high as 84.3 F cm−3 (or 24.8 F g−1) and 7.49 mW h cm−3 (or 2.21 mW h g−1), respectively. In addition, KF/Ag/CNT/PPy0.2 exhibits enhanced cyclability and wearability (its capacitance retains 94.0% after 1000 cycles and 93.2% after bending for 500 times) because of the special design of strong interactions between different components. Note that KF/Ag/CNT/PPy0.2 also has high tensile strength, modulus and break extension. These attractive integrated performances demonstrate that KF/Ag/CNT/PPy0.2 makes obvious breakthrough on developing FECs based on polymer fibres, and thus have great prospect in fabricating wearable electronic devices and sustainable energy sources.

Synthesis and PPy loading for enhanced visible-light photocatalytic activity of new POMOFs containing silver chains

A new polyoxometalate based hybrid compound containing Ag-Ag chain, [Ag29(trz)18][SiWV7WVI5O40] (Ag29SiW12), was synthesized by the simple one-step hydrothermal reaction of silver nitrate, 1, 2, 3- triazole (trz), and [SiW12O40]4- polyanion. Single crystal X-ray diffraction analysis shows that the [SiW12O40]4- polyanions as coordinating guests were successfully encapsulated into the metal-organic framework host matrix. The Keggin [SiW12O40]n- polyanions as templates and trz molecules as the small and delicate ligands play the decisive factors to the formation of silver chain. In addition, to improve the photocatalytic activity of the new compound Ag29SiW12, its polypyrrole (PPy) composite (PPy@Ag29SiW12) has been prepared and exhibits excellent photocatalytic activity (93.1% for MB and 48.8% for RhB) and selectivity adsorption (16.2 mg/g for MB and 1.60 mg/g for RhB) for organic dyes under the visible light radiation.

A remotely triggered drug release system with dot array-like configuration for controlled release of multiple drugs

Near-infrared (NIR) light as noninvasive external stimuli to trigger on-demand drug release has attracted great attention in recent years. However, the current existing NIR-related drug delivery systems (DDSs) still have difficulty in controlling the release of the individual drug separately. In the present work, a dot array-like DDS was developed for accurately controlling the release of multiple drugs. Each dot had a drug core and an outer protective layer. The outer protective layer consisted of lauric acid (LA) and polylactic acid (PLA). LA is a kind of phase-change material (PCM) with melting point of 43.8 °C. When loaded with polypyrrole nanoparticles (PPy NPs) that acted as photothermal transducers, the outer protective layer became NIR light responsive and was able to convert light into heat to melt the LA. As a result, the drugs stored inside were released. By changing the PPy loading, NIR light power density, and mass ratio of LA to PLA, the drug release profile could be carefully controlled. Such a NIR-responsive DDS may find great potential applications in treating diseases that require long-term therapies using more than one drug.

Study about the highest connected twin Keggin POMs based hybrid compound: Synthesis, PPy loading, physical absorption and visible-light photogradation for organic pollutant

A new high-connected twin Keggin polyoxometalates (POM) based metal organic complex (POM@MOC), [Ag28(trz)18][HPWV3WVI9O40]2·2H2O (Ag28P2W24) (trz = 1,2,3-triazole), has been synthesized and structurally characterized. Single crystal X-ray analysis reveals that the new compound contains two unprecedented [10,10] connected Keggin POMs, which represents the highest connection number of POMs to any mixed-connected POM@MOCs to date. Another fascinating structural feature is that the twin Keggin POMs respectively dominates and fabricates two kinds of helices in the POM@MOCs. In addition, to improve the photocatalytic activity of the new compound Ag28P2W24, its polypyrrole (PPy) composite (PPy/Ag28P2W24) has been prepared and exhibits good uptake capacities and photocatalytic degradation for Rhodamine B dye under the visible light.

Construction, PPy loading and photocatalytic performance of a polyoxometalate-templated metallacycle compound

A polyoxometalate-templated metallacycle compound, [Ag6trz6][H3PMo12O40]2·6H2O (trz = 1,2,3-triazole), has been isolated and structurally characterized. The compound represents the first example of a trigonal antiprism based metal-organic framework (MOFs) with complicated Zr6Br12 type topology, in which the trigonal antiprisms as building blocks are constructed by the Ag6trz6 space polygons and the bifunctional POMs (both as template and building block). In addition, to improve the photocatalytic activity of polyoxometalate-templated metallacycle compound, polypyrrole was loaded on its surface through a chemical oxidation polymerization process in situ. Finally, the photocatalytic activity of [Ag6trz6][H3PMo12O40]2 and PPy@[Ag6trz6][H3PMo12O40]2 under visible light was explored, and the results demonstrate that the PPy loading on the surface of POMs-based hybrid compound is feasible to improve their photocatalytic performance.

Study on the Effect of Polypyrrole and Polypyrrole/Graphene Oxide Nanoparticles on the Microstructure, Electrical and Tensile Properties of Polypropylene Nanocomposites

In this article Polypropylene/Polypyrrole (PP/PPy) and Polypropylene/polypyrrole-graphene oxide (PP/PPy-GO) nanocomposites were prepared by melt mixing. PPy nanoparticles and PPy-GO nanocomposite were prepared by chemical polymerization and served as nanofillers. FTIR, XRD and SEM analysis were used for the characterization of PPy and PPy-GO composites. The effects of PPy and PPy-GO loading level on the morphology, tensile and electrical properties of PP-based nanocomposites were examined. It was found that the Young's modulus and tensile strength increased with the increase of nanofiller content. Tensile results also showed that PPy-GO composite significantly affected the mechanical properties of PP based nanocomposites compared to the PPy nanoparticles. It was observed that the addition of 1% wt. PPy-GO into PP, increased the Young's modulus about 30% compared as with pure PP. Electrical conductivity measurements showed that conductivity of PP nanocomposites increased up to 1 × 10−3 S/cm for PP/PPy-GO nanocomposites. It was also observed that PP-g-MA improved the distribution of PPy and PPy-GO nanocomposites and affected the morphology, electrical and mechanical properties of PP-based nanocomposites.

Conductivity and long term stability of polypyrrole poly(styrene-co-methacrylic acid) core–shell particles at different polypyrrole loadings

Conductive core–shell particles were obtained by chemical polymerization of pyrrole over monodisperse poly(styrene-co-methacrylic acid) particles. The surface composition has been studied by elemental analysis, Fourier Transform Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), scanning electron microscopy and transmission electron microscopy techniques. XPS, elemental analysis and FTIR results allowed determining doping level and conjugation length of the polypyrrole (PPy) chain deposited on the latex surface. It is shown that the chain conjugation length, and not the doping level, is the principal factor that influences the conductivity. Samples with low PPy loading have short conjugation length and so low conductivity independently of their doping level. The experimental conductivity decay with time has been analysed following the electron hopping model, from this model the characteristic time (τ) of the conductivity degradation process has been determined.

Influence of current collector on capacitive behavior and cycling stability of Tiron doped polypyrrole electrodes

In this work we demonstrate the feasibility of electrodeposition of adherent polypyrrole (PPy) films on Ni substrates using Tiron as an anionic dopant. Compared to other aromatic sulfonate dopants, Tiron offers the advantages of higher charge to mass ratio and chelating properties, which are beneficial for the efficient charge transfer during electropolymerization and fabrication of adherent films. The use of Ni plaque current collectors allows higher capacitance and higher PPy loading compared to Ni foil current collectors. Moreover, the use of Ni plaques allows significant improvement in capacitance retention at high scan rates. The problem of poor cycling stability of PPy films on Ni foil current collectors is successfully addressed by the use of Ni plaques. The electron microscopy studies and impedance spectroscopy measurements during cycling provide an insight into the factors, controlling capacitance retention. The results indicate that for pure PPy electrodes the mass normalized specific capacitance of 339–451 F g−1 and area normalized specific capacitance of 0.4–0.95 F cm−2 can be achieved for material loadings of 0.84–2.80 mg cm−2. The PPy electrodes formed on Ni plaque current collectors are promising for applications in electrochemical supercapacitors.

Functionalized ionic liquid-assisted mechanochemical synthesis of graphene nanosheet/polypyrrole nanocomposites

This study describes a simple and effective ionic liquid (IL)-assisted mechanochemical route to prepare a set of nanostructured graphene nanosheet/polypyrrole (GNS/PPy) composites of with different PPy loading. The functionalized IL 1-butyl-3-methylimidazolium tetrachloroferrate (Bmim[FeCl 4]) used here acts as not only the dispersant of GNS but also the catalyst and dopant in the synthesis of PPy. FTIR illustrates the presence of PPy in the composites. A comparative study performed on composites and pure PPy has led to two main conclusions: on one hand, the microstructure of the GNS/PPy composites is dependent on the loading of PPy. On the other hand, GNS/PPy composites show improved conductivity and thermal stability compared with pure PPy.