Polyaniline-multiwalled Carbon Nanotube Research Articles

Exploring the electrochemical utilization of PANI/CNT-integrated Ni-Mn phosphates for advanced supercapacitor applications

The increasing need for high-performance energy storage systems necessitates the exploration of novel electrode materials. In this study, the utilization of polyaniline/multiwalled carbon nanotubes (PANI/MWCNTs) was demonstrated as a conductive scaffold for the formation of heterostructures comprising nickel manganese phosphate (NiMn(PO4)2) using probe sonication, leading to the development of an efficient hybrid supercapacitor. The PANI/MWCNTs composite exhibits favorable conductive properties, acting as a suitable framework for the nucleation/growth and integrating NiMn(PO4)2 structures. The synergistic combination of PANI/MWCNTs and NiMn(PO4)2 resulted in the development of a highly efficient hybrid anode, exhibiting a remarkable specific capacitance of 917.3 F g‐1 (912.2 C g−1) at 1 A g‐1 in a 1 M KOH electrolyte. The optimized composite, PCNT-NMP-40, as a positive electrode in a two-electrode cell configuration with activated carbon (AC) as the negative electrode, operates within an extended output potential range of 0–1.6 V in a 2 M KOH electrolyte, delivering an outstanding energy density of 58 Wh kg−1 and a power density of 918 W kg−1, reflecting the substantial potential use of PCNT-NMP-40 as an excellent candidate for advanced energy storage applications.

Detection of di(2-ethylhexyl) phthalate in edible vegetable oils using a sensitive aptasensor based on carbon nanomaterials and copper metal-organic framework

In this work, we designed a simple, disposable, highly sensitive electrochemical aptasensor to detect di(2-ethylhexyl) phthalate (DEHP) in edible vegetable oils. The aptasensor was created by decorating polyaniline multi-walled carbon nanotubes (PANI-MWCNTs), Cu metal-organic framework (CuMOF), and gold nanoparticles (AuNPs) on a screen printing carbon electrode (SPCE). With its large surface area, CuMOF modified the electrode by improving the adhesion rate of gold nanoparticles, thereby improving the detection limit of the sensor. The distinct peak in the square wave voltammetry (SWV) was used to measure DEHP. The sensor had high stability, excellent repeatability, reproducibility, and specificity, with a wide linear range (0.1–100 ng/mL) and a low detection limit (0.03 ng/mL). When the aptasensor was used to analyze the DEHP content in edible vegetable oils, the recovery rate was between 95.11 % and 98.29 %, and the results were consistent with the GC-MS measurements.

In-situ engineered polycrystalline phases in polyaniline-multiwalled carbon nanotubes composite exhibiting unique mechanism of charge storage

We report on a template/surfactant free, simple chemical synthesis, material properties, electrochemical behavior, and device performance of semi-polycrystalline polyaniline- multiwalled carbon nanotube (SPani-MWNT) composite as supercapacitor electrode. The specific capacitances (Csp) exhibit a unique, yet interesting pattern attributable to the presence of crystalline phases in the material. The electrode delivers a Csp of 359 F g−1 at a current density (CD) of 1 A/g, which declines to a lower value of 257 F g−1 at 5 A/g and gains a higher value of 444 F g−1 at 10 A/g in a 3-electrode cell configuration using 1 M aq.Na2SO4 as an electrolyte. Similar pattern of results is observed during performance of SPani-MWNT∥SPani-MWNT in a 2-electrode symmetrical device configuration with polymer gel electrolyte (xanthan gum in 1 M aq.Na2SO4). The device delivers a Csp of 56 F g−1, energy density of 5 Wh Kg−1, and a power density of 365 W kg−1 at an applied CD of 0.5 A/g. At a higher CD of 10 A/g, the device delivers energy density of ∼4 Wh kg−1 and power density of 6.7 kW kg−1. In addition, the device exhibits good electrochemical reversibility with cycling stability, retention of ∼80 % of its initial capacitance and 99 % of initial coulombic efficiency over 10,000 continuous GCD cycles at an applied CD of 0.5 A/g. The results indicate excellent rate capability and power management.

Dielectric characteristics of multiwall carbon nanotube-filled polyaniline

The dielectric properties of in-situ polymerized polyaniline-multiwalled carbon nanotubes (PANI/MWCNTs) nanocomposite sample were analyzed as a function of temperature (153–353 K) and applied frequency (1 Hz–1000 KHz) over a wide range. To introduce heterogeneity in PANI, MWCNTs (4 wt%) were embedded into the PANI matrix during the polymerization, whereas, to control the electrical conductivity, the synthesized material was reduced via chemical treatment with ammonia. FTIR spectroscopy studies confirm the synthesis of PANI/MWCNTs nanocomposite in lower conducting (emeraldine base) dielectric state. X-ray diffraction (XRD) pattern of the prepared sample reveals the semi-crystalline nature. Thermogravimetric analysis (TGA) investigation indicates that synthesized sample is more stable even at 800 °C. The dielectric studies reveal that the static dielectric constant of the prepared sample enhances with the enhancement in temperature and found to decrease with applied frequency. The enhancement in dielectric constant with temperature may be associated with the enhancement in mobility of the electric dipoles in the conducting polymer. The dielectric constant for the reduced PANI/MWCNTs composite (i.e. ∼1170) is high as compared to reduced pristine PANI (i.e. ∼538). The value of dc electrical conductivity has been decreased from 77 S/cm to 7.81x10−10 S/cm due to reduction of PANI/MWCNTs nanocomposite which indicates the enhancement in dielectric properties. The ac electrical conductivity of synthesized nanocomposite was also found to enhance with an increase in operating temperature, which may be endorsed to the enhancement in activated trapped charge carriers’ concentration.

Highly conducting PANI- fMWNT composites with exceptional crystallinity and enhanced thermal stability for potential applications

Here we report, the synthesis and characterization of the thin film of polyaniline-functionalized multiwalled carbon nanotube composite with exceptional electrical conductivity, excellent crystallinity and improved thermal stability. In this study, the multiwalled carbon nanotubes were functionalized using formaldehyde through an electrophilic substitution reaction and methylol groups (-CH2OH) attached to the sidewalls of the nanotubes. A significant dispersivity of polyaniline-multiwalled carbon nanotube composites was achieved as a result of the functionalization. The thin film of polyaniline-functionalized multiwalled carbon nanotube composite was prepared via the doping-dedoping-redoping process. The structural, morphological, thermal and conductivity studies of the synthesized polyaniline-functionalized multiwalled carbon nanotube composite samples were carried out using various characterization tools. The thin film sample shows an enhanced electrical conductivity of 1991 S/cm, which is pretty high among the reported values for polyaniline-carbon nanotube composites. It also exhibits an excellent crystallinity of 84.44%, the highest value ever reported. The thermal stability of the thin film sample is very high compared to the polyaniline sample. The charge transfer mechanism in the synthesized samples was investigated using the three-dimensional variable range hopping model. The ANOVA and regression analysis was performed to assess the validity of the model.

Flexible 3D Printed Acrylic Composites based on Polyaniline/Multiwalled Carbon Nanotubes for Piezoresistive Pressure Sensors

AbstractThe development of tunable UV‐curable polymeric composites for functional applications, taking into consideration environmental issues and additive manufacturing technologies, is a research topic with relevant challenges yet to be solved. Herein, acrylic composites filled with 0–3 wt.%. polyaniline/ multiwalled carbon nanotubes (PANI/MWCNT) are prepared by Digital Light Processing (DLP) in order to tailor morphology, thermal, mechanical, and electromechanical properties. Viscosity, real‐time infrared spectroscopy, and cure depth tests allow optimizing resin composition for suitable DLP printing. 2 wt.% is the maximum filler content reproducibly embedded in the polymer matrix. The advantages of PANI/MWCNT (50/50 wt.%) compared with single‐component composites include safety issues, enhanced printability, increased electrical conductivity and thermal stability, and lower electrical percolation threshold (0.83 wt.%). Above this threshold the composites display excellent piezoresistive response, no hysteresis, and stability for over 400 compression cycles. The pressure sensibility (PS) of 2 wt.% composites decreases with applied pressure from PS ≈ 15 to 0.8 Mpa−1 for maximum pressures of 0.02 and 0.57 MPa, respectively. A proof‐of‐concept of the functionality of the novel materials is developed in the form of a tactile sensor, demonstrating their potential for pressure sensing applications as cost‐effective, sustainable, and flexible materials for printed electronics.

Fractional circuit model for supercapacitors with polyaniline/carbon nanotube composite-based electrodes

Supercapacitors with polyaniline/multiwalled carbon nanotube (PANI/MWCNT) composite-based electrodes are fabricated and studied. The cases of electrodes with randomly distributed and vertically aligned MWCNTs are considered. The measured discharge curves demonstrate the presence of memory effect in studied devices. The fractional-order equivalent circuit model is proposed to describe the impedance spectra.

Probing the electrical and dielectric properties of polyaniline multi-walled carbon nanotubes nanocomposites doped in different protonic acids

Polymer nanocomposites with vital reinforcements of conductive fillers have evinced as next-generation high-performance materials with multi-functional applications. Herein, we report the facile synthesis of thermally stable, highly electrically conducting polyaniline multi-walled carbon nanotubes (PANI/MWCNT) nanocomposites doped in two different protonic acids, i.e. hydrochloric acid (HCl) and sulphuric acid (H2SO4). The doping acids significantly affect the electric and dielectric properties of conducting polymer nanocomposites. The paper probes in the synergistic effects of MWCNTs and the effect of doping acid on the thermal stability, conductivity and dielectric properties of the nanocomposites based on PANI nanofibres. The structural, morphological, optical, thermal and electrical properties were evaluated through X-ray diffraction, scanning electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, UV–Vis spectroscopy, thermogravimetric analysis and two-point probe technique. Ascribed to the high interfacial interaction between PANI and MWCNT, and considering the effect of doping acids, nanocomposites with high thermal stability, enhanced conductivity and high dielectric constant that can store large electrical charges have been synthesized by surfactant-assisted, in situ oxidative polymerization of aniline, in the presence of potassium persulfate as oxidant. The micellar structure of surfactant assists the dispersion of MWCNTs as well as the formation of PANI/MWCNT tubular structures. The effect of surfactant below and above critical micelle concentration was also studied. This complete study would affirm such a nanocomposite which procures excellent electrical and dielectric properties for microelectronic applications.

Electrochemical determination of L-arginine in leukemic blood samples based on a polyaniline-multiwalled carbon nanotube—magnetite nanocomposite film modified glassy carbon electrode

The present study reports an electrochemical biosensor for the rapid and selective detection of L-arginine in leukemic blood samples. The biosensor was fabricated using a nanocomposite (PANI/MWCNTs/Fe3O4) film modified glassy carbon electrode (GCE). The partially purified arginine deiminsae (ADI) enzyme from P. putida was immobilized on the modified GCE by cross linking with gluteraldehyde. The characterization and validation of the developed biosensor was performed by various electrochemical techniques including cyclic voltammetry (CV), differential pulse voltammetry (DPV) and chronoamperometry (CA). The limit of detection for biosensor was determined to be as low as 20 μM based on a signal-to-noise ratio equal to three while employing a detection period of 10 s. A linear response for L-arginine was observed across the concentration range from 100 to 1000 µM with an R2 value of 0.9987. The biosensor designed in the present study offers highly specific and sensitive analysis in normal and leukemic blood samples compared to previous reports in the literature. Therefore this device has excellent potential for nano-device fabrication for biomedical applications.

Interfacially Interactive Ternary Silver-Supported Polyaniline/Multiwalled Carbon Nanotube Nanocomposites for Catalytic and Antibacterial Activity.

Herein, a protocol strategy has been designed for the preparation of ternary silver nanoparticles-supported polyaniline multiwalled carbon nanotube (Ag NPs–PANI/MWCNT) nanocomposites with a chemical interaction for catalytic and antibacterial activity. The morphological study confirmed that Ag NPs were immobilized on the surface of PANI, and afterward, Ag NPs–PANI were mixed with the MWCNTs. The X-ray diffraction technique revealed the face-centered cubic structure of Ag NPs, and the X-ray photoelectron spectroscopy study revealed the chemical constituent and signature of π–π* and C–N interactions in the nanocomposites. The ternary Ag NPs–PANI/MWCNTs nanocomposites have the apparent rate of reaction (Kapp) as 5.4 × 10–3 s–1, higher than binary nanocomposites for catalytic reduction of 4-nitrophenol to 4-aminophenol at room temperature. Antibacterial activity of Ag NPs–PANI/MWCNT nanocomposites is higher against pathogenic bacteria. Thereafter, because of multifold applications of ternary nanocomposites, they have a broad scope in the field of environmental and healthcare sectors.

High-Performance Gas Sensor of Polyaniline/Carbon Nanotube Composites Promoted by Interface Engineering.

Inspired by the enhanced gas-sensing performance by the one-dimensional hierarchical structure, one-dimensional hierarchical polyaniline/multi-walled carbon nanotubes (PANI/CNT) fibers were prepared. Interestingly, the simple heating changed the sensing characteristics of PANI from p-type to n-type and n-type PANI and p-type CNTs form p–n hetero junctions at the core–shell interface of hierarchical PANI/CNT composites. The p-type PANI/CNT (p-PANI/CNT) and n-type PANI/CNT (n-PANI/CNT) performed the higher sensitivity to NO2 and NH3, respectively. The response times of p-PANI/CNT and n-PANI/CNT to 50 ppm of NO2 and NH3 are only 5.2 and 1.8 s, respectively, showing the real-time response. The estimated limit of detection for NO2 and NH3 is as low as to 16.7 and 6.4 ppb, respectively. After three months, the responses of p-PANI/CNT and n-PANI/CNT decreased by 19.1% and 11.3%, respectively. It was found that one-dimensional hierarchical structures and the deeper charge depletion layer enhanced by structural changes of PANI contributed to the sensitive and fast responses to NH3 and NO2. The formation process of the hierarchical PANI/CNT fibers, p–n transition, and the enhanced gas-sensing performance were systematically analyzed. This work also predicts the development prospects of cost-effective, high-performance PANI/CNT-based sensors.

Correction to “Polyaniline Multiwalled Carbon Nanotube Magnetic Composite Prepared by Plasma-Induced Graft Technique and Its Application for Removal of Aniline and Phenol”

Correction to “Polyaniline Multiwalled Carbon Nanotube Magnetic Composite Prepared by Plasma-Induced Graft Technique and Its Application for Removal of Aniline and Phenol”

Structure and optical properties of PANI/MWCNTs nanocomposites thin films prepared by plasma jet polymerization

Polyaniline Multi walled Carbon nanotubes (PANI/MWCNTs) nanocomposite thin films have been prepared by non-equilibrium atmospheric pressure plasma jet on glass substrate with different weight percentage of MWCNTs 1, 2, 3, 4%. The diameter of the MWCNTs was in the range of 8-55 nm and length - - 55 55 μm. the nanocomposite thin films were characterized by UV-VIS, XRD, FTIR, and SEM. The optical studies show that the energy band gap of PANI/MWCNTs nanocomposites thin films will be different according to the MWCNTs polyaniline concentration. The XRD pattern indicates that the synthesized PANI/MWCNTs nanocomposite is amorphous. FTIR reveals the presence of MWCNTs nanoparticle embedded into polyaniline. SEM surface images show that the MWCNTs homogenously inside the polyaniline house. It can be concluded that the nanocomposite can be prepared PANI/MWCNTs thin films by plasma jet polymerization and control the optical energy band gap irregulars by controlling the MWCNTs weight concentration.

PANI/MWCNT based humidity sensor

Polyaniline Multi wall Carbon nanotube (PANI/MWCNTs) nanocomposite thin films have been prepared by Plasma jet polymerization at low frequency on glass substrate with preliminary deposited aluminum electrodes to form Al/PANI-MWCNT/Al surface-type capacitive humidity sensors, the gap between the electrodes about 50 μm and the MWCNTs weight concentration varied between 0, 1, 2, 3, 4%. The diameter of the MWCNTs was in the range of 8-15 nm and the length 10-55 μm. The capacitance-humidity relationships of the sensors were investigated at humidity levels from 35 to 90% RH. The electrical properties showed that the capacity increased with increasing relative humidity, and that the sensitivity of the sensor increases with the increase of the additive (MWCNTs); while each of the response time and the recovery time increasing with concentration. The change in MWCNTs concentration leads to a change in the energy gap as well as the initial capacity. The capacitance increases linearly with the relative humidity at MWCNTs concentration of 3% for thus the possibility of manufacturing humidity sensor with good specifications at this concentration.

Dispersing gold nanoparticles on thiolated polyaniline-multiwalled carbon nanotubes for development of an indole-3-acetic acid amperometric immunosensor

An amperometric immunosensor based on new thiolated bionanocomposite with a high dispersion of gold nanoparticles (AuNPs) for the sensitive detection of indole-3-acetic acid (IAA) is being reported herein. Briefly, a thiolated nanocomposite was prepared via the microwave-assisted thiol–ene reaction of 2,5-dimercapto-1,3,4-thiadiazole (DMcT) with oxidized polyaniline (PANI), which was synthesized in the presence of multiwalled carbon nanotubes (MWCNTs), yielding thiolated polyaniline (TPANI)-MWCNTs. Further, AuNPs were deposited on the TPANI-MWCNTs by microwave-assisted method to obtain a AuNPs/TPANI-MWCNTs nanocomposite. Finally, the thiolated bionanocomposite film was constructed via the specific chemical reaction between boronic acid functionalized AuNPs and the vicinal diol functionalized AuNP labeled immunoglobulin G (IgG–AuNPs). The change in the reduction peak current of Fe(CN)63− was used to monitor the immunoreaction between IAA and antibody. The TPANI-MWCNT nanocomposites uniformly disperse AuNPs, IgG–AuNPs and anti-IAA-AuNPs, leading to the amplification of the signal of the immunosensor. Fourier transform infrared spectra (FTIR), cyclic voltammetry (CV), transmission electron microscopy (TEM), ultraviolet visible spectroscopy (UV-vis) and differential pulse voltammetry (DPV) were used to characterize the nanocomposite film and the stepwise modification of the immunosensor. The prepared thiolated bionanocomposite material has good biocompatibility, a highly uniform dispersion of the AuNPs with a narrow size distribution as verified by TEM, and high load/activity of the immobilized antibody proved via DPV. The fabricated IAA amperometric immunosensor not only exhibits a good linear arrange from 1.0 pg mL−1 to 10 ng mL−1 with the limit of detection of 0.97 pg mL−1 (S/N = 3), but also possesses good selectivity, reproducibility and stability for the detection of IAA.

Polyaniline/carbon nanotube-graphite modified electrode sensor for detection of bisphenol A

Endocrine disruptors bisphenol A (BPA) have dreadful impacts on both humans and animals. A highly sensitive polyaniline-MWCNT-graphite (PANI-MWCNT-Gr)-base electrode sensor has been developed for the detection of BPA in water. The nanocomposite electrode was fabricated using a facile sol-gel chemical route by the reaction of graphite electrode (Gr) and polyaniline/multiwall carbon nanotube (PANI/MWCNT). Synergistic electrochemical interaction between MWCNT and PANI boosts electron transfer, resulting improvement in the generated current as compared to bare graphite and other reported electrodes. Consequently, a PANI/MWCNT-Gr-supported electrode sensor shows the unique potential of detecting BPA in a sub-nano range. Prepared nanocomposite electrode has been effectively employed for the detection of BPA in real samples (such as baby feed bottles), with more than 95% accuracy, which could potentially replace conventional detection systems. Advance experiments related to the stability of PANI/MWCNT-Gr-supported nanocomposite electrodes are in progress for replacing carbon electrodes in microbial fuel cells.

Synthesis of polyaniline/MWCNTs by interfacial polymerization for superior hybrid supercapacitance performance

Polyaniline/Multiwalled carbon nanotubes (PANI/MWCNTs) nanocomposite was prepared via liquid-liquid interfacial polymerization method. The morphology studies of the nanocomposite using SEM and TEM techniques confirmed the presence of PANI as aggregates along with MWCNTs and X-ray diffraction studies indicated the presence of graphitic planes of MWCNTs along with PANI in semi-crystalline emeraldine salt form. The PANI/MWCNTs nanocomposite electrode exhibited specific capacitance (Cs) of 1551 F/g at a scan rate of 2 mV/s in aqueous 1 M H2SO4 in a potential window of 0–1.2 V. The material exhibited good cycle life with 95% capacitance retention in a life cycle test conducted at 5 A/g for 1000 cycles. Further, an asymmetric supercapacitor device (ASD) was fabricated using PANI/MWCNTs as positive and activated carbon as negative electrodes in aqueous 1 M H2SO4. The ASD exhibited a Cs of 142 F/g at a scan rate of 5 mV/s in a wide potential range of 0–1.6 V. The device offered high energy and power densities of 29 Wh/Kg and 7.3 kW/Kg respectively and also demonstrated an excellent cyclic stability by retaining 97% of its initial capacitance after 5000 cycles at high current density of 20 A/g.

Investigation on energy storage and conversion properties of multifunctional PANI-MWCNT composite

Polyaniline-multiwalled carbon nanotube (PANI-MWCNT) composite synthesized through chemical polymerization is investigated as a possible electrode material for supercapacitor as well as an electro-catalyst for hydrogen evolution reaction (HER) in acidic medium. UV–Vis spectroscopy, FTIR spectroscopy and field emission scanning electron microscopy (FESEM) have been used to characterize the electrode material. The binder-free electrodes were prepared and they exhibit a specific capacitance of 540.29 F g−1 at a scan rate of 2 mV s−1 in 1 M H2SO4 electrolyte. The material exhibits excellent pseudocapacitive behaviour due to the presence of PANI with long-term cyclic stability of 87.4% retention after 5000 cycles. PANI-MWCNT composite also shows good HER activity, with overpotential of −395 mV.

Enhanced electrocatalytic performance of platinum nanoparticles on thiolated polyaniline-multiwalled carbon nanotubes for methanol oxidation.

Pt nanoparticles (PtNPs) well-dispersed on thiolated polyaniline (TPANI)-multiwalled carbon nanotubes (MWCNTs) were prepared for enhanced electrocatalytic oxidation of methanol in acidic media. Briefly, the preparation of nanocomposites was carried out via microwave-assisted thiol–ene reaction of 2,5-dimercapto-1,3,4-thiadiazole (DMcT) with oxidized PANI, which was synthesized in the presence of MWCNTs, yielding TPANI-MWCNTs; then, PtNPs were deposited on TPANI-MWCNTs by a microwave-assisted method to obtain PtNPs/TPANI-MWCNT nanohybrids. Fourier transform infrared spectroscopy, cyclic voltammetry (CV), transmission electron microscopy (TEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA) and inductively coupled plasma-atom emission spectroscopy were used to study relevant nanohybrid properties. TEM showed that PtNPs were well dispersed on TPANI-MWCNTs. TGA showed that PtNPs/TPANI-MWCNTs exhibited better thermal stability than PtNPs/TPANI-MWCNTs and PtNPs/MWCNTs. CV studies showed that PtNPs/TPANI-MWCNT-modified glassy carbon electrode (GCE) exhibited a larger electrochemically active surface area and higher electrocatalytic performance toward methanol electro-oxidation compared with those of PtNPs/PANI-MWCNTs/GCE and PtNPs/MWCNTs/GCE. Also, the PtNPs/TPANI-MWCNTs/GCE electrode possessed high stability and maintained 86% of its initial catalytic activity after 1000-cycle CV in 1.0 M CH3OH + 0.5 M H2SO4.

Electrical conductivity, aging behavior, and electromagnetic interference (EMI) shielding properties of polyaniline/MWCNT nanocomposites

Electrically conducting polyaniline/multiwalled carbon nanotubes (PANi/MWCNTs) nanocomposites were successfully synthesized via chemical oxidative polymerization. For this purpose, PANi was first prepared in an aqueous acidic medium, hydrochloric acid (HCl), at various temperatures to determine the proper polymerization temperature and to prepare the polymer with the highest electrical conductivity. For nanocomposite preparation, the polymerization of aniline (ANi) was carried out in the presence of various amounts of MWCNTs dispersed using a proper surfactant. The effect of HCl and MWCNT contents on the conductivity of the resultant composites was investigated. The results showed that the conductivity was monotonically increased with increasing the MWCNT and HCl levels. In addition, the effect of anionic and cationic surfactant type, sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB), on the conductivity and morphology of the resulting nanocomposites, was studied. Fourier transform infrared (FT-IR) spectroscopy, Raman spectroscopy, two- and four-point resistivity measuring methods, and field emission scanning electron microscopy (FESEM) were used to characterize the neat PANi and PANi/MWCNT nanocomposites. The conductivity variation of the conducting polymers versus elapsed time was investigated to determine the intensity and dominant aging mechanism. Electromagnetic shielding properties of the conducting nanocomposites were also studied. The results indicated that the nanocomposite with the highest MWCNTs level absorbed more than 83% of the incident electromagnetic waves.