Computational prediction of electrical percolation threshold in polymer/graphene-based nanocomposites with finite element method

Veiskarami, Amir; Sardari, Dariush; Malekie, Shahryar; Mofrad, Farshid Babapour; Kashian, Sedigheh

doi:10.1515/polyeng-2022-0101

Cited by 7 publications

(3 citation statements)

References 94 publications

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“…For polymer/carbon nanostructures, the amount of carbon additives can affect the detector/dosimeter response consequently 17 , 18 . Adding carbon nanostructured materials such as GO and carbon nanotubes (CNTs) into a polymer matrix in a particular weight fraction entitled electrical percolation threshold (EPT), leads to a subsequent sudden increase in electrical conductivity of the nanocomposite of several orders of magnitude 4 , 19 , 20 . On the other hand, the weight percentage of GO in the nanocomposite should not exceed the EPT value, because the amount of dark current in detection/dosimetry systems increases and reduces the sensitivity.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of dosimetric characteristics of a ternary nanocomposite based on High Density Polyethylene/Bismuth Oxide/Graphene Oxide for gamma-rays

Veiskarami

Sardari

Malekie

et al. 2022

Sci Rep

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This research aims to investigate a ternary nanocomposite based on High Density Polyethylene/ Bismuth Oxide/Graphene Oxide (HDPE/Bi2O3/GO) at various concentrations. Solution method was used to fabricate the samples. FESEM-EDX mapping, AFM, TEM, XRD, XPS, FTIR, and TGA/DTG analyses were carried out on the samples. XRD analysis demonstrated a semi-crystalline behavior for the samples. TEM analysis exhibited a cauliflower-like structure of the material. The sample was irradiated by gamma-rays of 60Co source over the dose rate of 30–254 mGy/min and the electric current was measured as the response of the real-time dosimeter. Thus, various dosimetric characteristics were performed, namely linearity, angular dependence, energy dependence, bias-polarity, field size, and repeatability of the data. Results showed that response of the dosimeter was linear in the range of the investigated dose rate. The sensitivity of the 60 wt% Bi2O3 sample was measured as 3.4 nC·mGy−1. The angular response variation was 20% for normal beam incidence. The response of the dosimeter to assess the energy dependency was obtained as 2.2% at the radiation field of the 137Cs and 60Co beams. The dosimeter response was dependent on the bias-polarity, with maximum discrepancy of 11.1%. The dosimetry response was highly dependent upon the radiation field size. The repeatability of the dosimeter response was measured with standard deviation less than 1%. As well, the dosimeter response during the one-hour irradiation was stable with a standard deviation of 0.66%. Results showed that considering some correction factors, this material can be used for dosimetry of gamma-rays at the therapy level.

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Section: Introductionmentioning

confidence: 99%

Evaluation of dosimetric characteristics of a ternary nanocomposite based on High Density Polyethylene/Bismuth Oxide/Graphene Oxide for gamma-rays

Veiskarami

Sardari

Malekie

et al. 2022

Sci Rep

Self Cite

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“…Due to its superhydrophobicity, high surface area, chemical inertness, low density, recyclability, and selectivity, carbon nanotubes based on membranes have been developed for oil spill clean-ups by Parangusan et al 32 . The addition of carbon nanotube greatly improves the electrical conductivity of polymer composites with a sudden transition from an insulator to a semiconductor due to the decrease of tunneling distance 33 – 35 .…”

Section: Introductionmentioning

confidence: 99%

Gamma irradiation induced surface modification of (PVC/HDPE)/ZnO nanocomposite for enhancing the oil removal and conductivity using COMSOL multiphysics

Ghobashy

El-Gawad

Fayek

et al. 2023

Sci Rep

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Blend nanocomposite film was prepared by loadings of irradiated ZnO in ratios of (5 wt%) inside the PVC/HDPE matrix using a hot-melt extruder technique. The physical and chemical properties of the irradiated and unirradiated ZnO samples are compared. The Vis–UV spectrum of ZnO shows an absorption peak at a wavelength of 373 nm that was slightly red-shifted to 375 nm for an irradiated sample of ZnO at a dose of 25 kGy due to the defect of crystal structure by the oxygen vacancy during gamma irradiations. This growth of the defect site leads to a decrease in energy gaps from 3.8 to 2.08 eV. AC conductivity of ZnO sample increased after the gamma irradiation process (25 kGy). The (PVC/HDPE)/ZnO nanocomposites were re-irradiated with γ rays at 25 kGy in the presence of four different media (silicon oil, sodium silicate, paraffin wax and water). FTIR and XRD were performed to monitor the changes in chemical composition. The new peak at 1723 cm−1 attributed to C=O groups was observed in irradiated (PVC/HDPE)ZnO samples at only sodium silicate and water media. This process induced new function groups on the surface of the (PVC/HDPE)/ZnO blend sample. This work aims to develop (PVC/HDPE)ZnO for oil/water separation. The highest oil adsorption capability was observed in samples functionalized by C=O groups based on the different tested oils. The results suggest that the surface characterization of the (PVC/HDPE)/ZnO can be modified to enhance the oil adsorption potential. Further, the gamma irradiation dose significantly enhanced the AC conductivity compared to the unirradiated sample. According to COMSOL Multiphysics, the irradiated sample (PVC/HDPE)ZnO in water shows perfect uniform electric field distribution in medium voltage cables (22.000 V).

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“…For instance, the finite element approach is used to develop a two‐dimensional model to estimate the electrical percolation threshold (EPT) of polymer/graphene‐based nanocomposites in varying concentrations of randomly dispersed inclusions in diverse polymer matrices. [ 19 ] An efficient and affordable method to research the characteristics of nanocomposites is, without a doubt, FE, combined with the response surface method (RSM). [ 20 ] Additionally, RSM optimization methods enable the input parameters to vary simultaneously rather than one at a time, and to explore interactions between the components, in contrast to the experimental approach, which usually investigates one element at a time while holding other factors constant.…”

Section: Introductionmentioning

confidence: 99%

Response surface optimization and finite element homogenization study of the effective elastic modulus and electrical conductivity of MXene‐polypyrrole hybrid nanocomposite as electrode material for electronic energy storage devices

Ezika

Sadiku

Adekoya

et al. 2022

Polymer Engineering & Sci

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Electrical energy storage devices are crucial for energy storage and distribution purposes. MXene (MX), a 2D material, and conductive organic polymers, such as polypyrrole (PPy), have been widely used as electrode material in electronic energy storage devices. This work calculated the elastic modulus and the electrical conductivity of a MX/PPy nanocomposite electrode using a finite element model. Response Surface Methodology (RSM) was used to optimize the electrical conductivity and elastic modulus response variables based on the finite element (FE) simulation findings. By assigning appropriate weights to these response factors in the optimization technique, the impacts of mass fraction and aspect ratio (AR) of MX inclusion on the electrical conductivity values and elastic modulus of the electrode were analyzed. When compared to the experimental findings, the results demonstrated that the suggested finite element model could provide a satisfactory estimate of the electrical conductivity and elastic modulus of the electrodes made of MX and PPy. However, these response variables might be optimized by using the response surface approach. Therefore, when RSM was employed, both electrical conductivity and Youngs modulus could be adjusted to close to their respective maximum optimal values, with a predicted electrical conductivity of 474.33 S/m and an elastic modulus of 3.24 GPa, at 50% mass fraction of the MX and the AR of 0.2. Based on these results, if a MX/PPy nanocomposite electrode could be built to achieve this modulus and electrical conductivity, such electrode would be a viable material for metal-ion batteries.

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Computational prediction of electrical percolation threshold in polymer/graphene-based nanocomposites with finite element method

Cited by 7 publications

References 94 publications

Evaluation of dosimetric characteristics of a ternary nanocomposite based on High Density Polyethylene/Bismuth Oxide/Graphene Oxide for gamma-rays

Evaluation of dosimetric characteristics of a ternary nanocomposite based on High Density Polyethylene/Bismuth Oxide/Graphene Oxide for gamma-rays

Gamma irradiation induced surface modification of (PVC/HDPE)/ZnO nanocomposite for enhancing the oil removal and conductivity using COMSOL multiphysics

Response surface optimization and finite element homogenization study of the effective elastic modulus and electrical conductivity of MXene‐polypyrrole hybrid nanocomposite as electrode material for electronic energy storage devices

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