Modeling of Effective Electrical Conductivity and Percolation Behavior in Conductive-Polymer Nanocomposites Reinforced with Spherical Carbon Black

2021 ◽  
Author(s):  
M. Mazaheri ◽  
J. Payandehpeyman ◽  
S. Jamasb
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Polymer Nanocomposites ◽  
Conductive Polymer ◽  
Spherical Carbon ◽  
Effective Electrical Conductivity ◽  
Percolation Behavior

Electrical conductivity and rheological properties of carbon black based conductive polymer composites prior to and after annealing

2021 ◽  
pp. 096739112110012
Author(s):  
Qingsen Gao ◽  
Jingguang Liu ◽  
Xianhu Liu
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Percolation Threshold ◽  
Rheological Properties ◽  
Network Formation ◽  
Loss Modulus ◽  
Conductive Polymer ◽  
Complex Viscosity ◽  
Electrical Percolation ◽  
Electrical Percolation Threshold

The effect of annealing on the electrical and rheological properties of polymer (poly (methyl methacrylate) (PMMA) and polystyrene (PS)) composites filled with carbon black (CB) was investigated. For a composite with CB content near the electrical percolation threshold, the formation of conductive pathways during annealing has a significant impact on electrical conductivity, complex viscosity, storage modulus and loss modulus. For the annealed samples, a reduction in the electrical and rheological percolation threshold was observed. Moreover, a simple model is proposed to explain these behaviors. This finding emphasizes the differences in network formation with respect to electrical or rheological properties as both properties belong to different physical origins.

Analysis of Clustering and Interphase Region Effects on the Electrical Conductivity of Carbon Nanotube-Polymer Nanocomposites via Computational Micromechanics

2008 ◽  
Author(s):  
Gary D. Seidel ◽  
Kelli L. Boehringer ◽  
Dimitris C. Lagoudas
Keyword(s):  
Electrical Conductivity ◽  
Polymer Nanocomposites ◽  
Effective Conductivity ◽  
Interphase Layer ◽  
Finite Element Software ◽  
Interphase Region ◽  
Effective Electrical Conductivity ◽  
Wide Range ◽  
Electrical Conductivities ◽  
Computational Micromechanics

In the present work, computational micromechanics techniques are applied towards predicting the effective electrical conductivities of polymer nanocomposites containing aligned bundles of SWCNTs at wide range of volume fractions. Periodic arrangements of well-dispersed and clustered/bundled SWCNTs are studied using the commercially available finite element software COMSOL Multiphysics 3.4. The volume averaged electric field and electric flux obtained are used to calculate the effective electrical conductivity of nanocomposites in both cases, therefore indicating the influence of clustering on the effective electrical conductivity. In addition, the influence of the presence of an interphase region on the effective electrical conductivity is considered in a parametric study in terms of both interphase thickness and conductivity for both the well dispersed case and for the clustered arrangements. Comparing the well-dispersed case with an interphase layer to the same arrangement without the interphase layer allows for the assessment of the influence of the interphase layer on the effective electrical conductivities, while similar comparisons for the clustered arrangements yield information about the combined effects of clustering and interphase regions. Initial results indicate that there is very little influence of the interphase layer on the effective conductivity prior to what is identified as the interphase percolation concentration, and that there is an appreciable combined effect of clustering in the presence of interphase regions which leads to increases in conductivity larger than the sum of the two effects independently.

Recent progress on improving the mechanical, thermal and electrical conductivity properties of polyimide matrix composites from nanofillers perspective for technological applications

2021 ◽  
Vol 41 (9) ◽  
pp. 768-787
Author(s):  
Victor Ekene Ogbonna ◽  
A. Patricia I. Popoola ◽  
Olawale M. Popoola ◽  
Samson O. Adeosun
Keyword(s):  
Electrical Conductivity ◽  
Polymer Nanocomposites ◽  
Recent Progress ◽  
Conductive Polymer ◽  
Matrix Composites ◽  
Thermal And Electrical Properties ◽  
Review Study ◽  
Polyimide Matrix ◽  
Conduction Polymer ◽  
Selection Of

Abstract The adoption of polymer nanocomposites in the design/manufacturing of parts for engineering and technological applications showcases their outstanding properties. Among the polymer nanocomposites, polyimide (PI) nanocomposites have attracted much attention as a composite material capable of withstanding mechanical, thermal and electrical stresses, hence engineered for use in harsh environments. However, the nanocomposites are limited to the application area that demands conduction polymer and polymer composites due to the low electrical conductivity of PI. Although, there has been advancement in improving the mechanical, thermal and electrical properties of PI nanocomposites. Thus, the review focuses on recent progress on improving the mechanical, thermal and electrical conductivity properties of PI nanocomposites via the incorporation of carbon nanotubes (CNTs), graphene and graphene oxide (GO) fillers into the PI matrix. The review summarises the influence of CNTs, graphene and GO on the mechanical and conductivity properties of PI nanocomposites. The authors ended the review with advancement, challenges and recommendations for future improvement of PI reinforced conductive nanofillers composites. Therefore, the review study proffers an understanding of the improvement and selection of PI nanocomposites material for mechanical, thermal and electrical conductivity applications. Additionally, in the area of conductive polymer nanocomposites, this review will also pave way for future study.

scholarly journals Effect of polyamide 6 on the morphology and electrical conductivity of carbon black-filled polypropylene composites

2017 ◽  
Vol 4 (12) ◽  
pp. 170769 ◽  
Author(s):  
Xuewei Zhang ◽  
Jiang Liu ◽  
Yi Wang ◽  
Wei Wu
Keyword(s):  
Electrical Conductivity ◽  
Carbon Black ◽  
Plastic Material ◽  
Conductive Polymer ◽  
Polyamide 6 ◽  
Surface Resistivity ◽  
Electric Industry ◽  
Polypropylene Composites ◽  
Electrical Percolation ◽  
Double Percolation

Carbon black (CB)-filled polypropylene (PP) with surface resistivity between 10 6 and 10 9  Ω sq −1 is the ideal antistatic plastic material in the electronics and electric industry. However, a large amount of CB may have an adverse effect on the mechanical properties and processing performance of the material, thus an improved ternary system is developed. Blends of CB-filled PP and polyamide 6 (PA6) have been prepared by melt blending in order to obtain electrically conductive polymer composites with a low electrical percolation threshold based on the concept of double percolation. The morphological developments of these composites were studied by scanning electron microscopy. The results showed that CB particles were selectively dispersed in PA6 phases due to the good interaction and interfacial adhesion between CB and PA6. At the same CB loadings, the surface resistivity of PP/PA6/CB composite was smaller than that of PP/CB composite system, which indicated the better conductivity in the former composite. The increasing amount of PA6 in the composites changed the morphology from a typical sea–island morphology to a co-continuous morphology. What is more, with 8 wt% of CB and PP/PA6 phase ratio of 70/30 in which the PP and PA6 phases formed a co-continuous structure, the electrical conductivity of the composite peaked at 2.01 × 10 5  Ω sq −1 .

scholarly journals Konduktivitas Listrik Poly(Lactic Acid) dengan Variasi Bahan Isian Karbon: Review

2021 ◽  
Vol 5 (1) ◽  
pp. 59
Author(s):  
Gabrella Efendy ◽  
Indah Dwi Handayani ◽  
N Fauziatul Husni ◽  
Siti Habibah ◽  
Mujtahid Kaavessina
Keyword(s):  
Lactic Acid ◽  
Carbon Black ◽  
Polymer Nanocomposites ◽  
Conductive Polymer ◽  
Poly Lactic Acid ◽  
Melt Blending ◽  
Carbon Nano Tube

<p><em>Conductive Polymer Nanocomposites</em> (CPC) merupakan material yang banyak digunakan sebagai sensor, sel fotovoltaik, kapasitor, dioda, dan perangkat energi yang sangat mudah meregang. CPC memiliki beberapa sifat unggul, diantaranya konduktivitas elektrik yang tinggi, ringan, tahan korosi, dan memiliki karakteristik mekanis yang bagus. Konduktivitas elektrik pada polimer diperoleh dan diatur dengan menambahkan bahan isian berbasis karbon seperti: <em>Carbon Black</em> (CB), <em>Carbon Nano Tube</em> (CNT), <em>Graphite</em> maupun <em>Graphene</em>. Metode panambahan bahan isian dapat dilakukan dengan<em> </em><em>Melt </em><em>b</em><em>lending</em><em> </em>dan <em>Solvent blending.</em> Metode <em>melt</em> <em>blending</em><em> </em>memiliki beberapa keunggulan, diantaranya mudah, praktis, murah, serta dapat diaplikasikan pada berbagai bahan. Selain itu, metode <em>melt blending</em> termasuk  ramah lingkungan karena tidak ada pelarut organik. Sedangkan kelebihan metode <em>Solvent Blending </em>adalah campuran yang lebih kuat dikarenakan <em>disperse</em> yang terjadi merata dan lebih baik. Pada<em> revie</em><em>w,</em> penulis mengulas tentang sifat elektrik dari CPC berbasis poli asam laktat dan berbagai bahan isian  karbon, yaitu CNT, <em>graphene</em>, dan CB. Hasil studi literatur menunjukkan bahwa konduktivitas elektrik CPC meningkat seiring bertambahnya komposisi bahan isian<em>.</em> Pada metode <em>solvent blending </em>faktor yang berpengaruh adalah komposisi PLA dan <em>filler</em>, suhu operasi, kecepatan pengadukan, waktu pengadukan, dan <em>solvent</em> yang digunakan. Sedangkan metode <em>melt blending</em> faktor yang berpengaruh adalah komposisi PLA dan <em>filler</em>, suhu operasi, kecepatan, dan waktu.</p><p> </p><p>Kata kunci: Poli Asam Laktat, CNT, CB, <em>Graphene</em>, CPC</p>

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