Predicting effective electrical resistivity and conductivity of carbon nanotube/carbon black-filled polymer matrix hybrid nanocomposites

Haghgoo, Mojtaba; Ansari, R.; Hassanzadeh-Aghdam, Mohammad Kazem

doi:10.1016/j.jpcs.2021.110444

Cited by 40 publications

(26 citation statements)

References 46 publications

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“…In another study by Haghgoo et al [ 12 ], they have concluded the importance of the effect of agglomerate size to tunneling distance ratio on the electrical conductivity. A more recent study by Haghgoo et al [ 13 ] also revealed that the electrical conductivity increases with the increase in agglomeration size. In terms of thermal conductivity, Hassanzadeh-Aghdam and Ansari [ 14 ] have shown that CNT agglomeration lowers the thermal conductivity of SMP nanocomposites.…”

Section: Introductionmentioning

confidence: 90%

A Review on the Modeling of the Elastic Modulus and Yield Stress of Polymers and Polymer Nanocomposites: Effect of Temperature, Loading Rate and Porosity

et al. 2022

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Porous polymer-based nanocomposites have been used for various applications due to their advantages, including multi-functionalities, easy and known manufacturability, and low cost. Understanding of their mechanical properties has become essential to expand the nanocomposites’ applications and efficiency, including service-life, resistance to different loads, and reliability. In this review paper, the focus is on the modeling of the mechanical properties of porous polymer-based nanocomposites, including the effects of loading rates, operational temperatures, and the material’s porosity. First, modeling of the elastic modulus and yield stress for glassy polymers and polymer reinforced by nanofillers are addressed. Then, modeling of porosity effects on these properties for polymers are reviewed, especially via the use of the well-known power-law approach linking porosity to elastic modulus and/or stress. Studies related to extending the mechanical modeling to account for porosity effects on the elastic modulus and yield stress of polymers and polymer-nanocomposites are discussed. Finally, a brief review of the implementation of this modeling into 3D computational methods to predict the large elastic-viscoplastic deformation response of glassy polymers is presented. In addition to the modeling part, the experimental techniques to measure the elastic modulus and the yield stress are discussed, and applications of polymers and polymer composites as membranes for water treatment and scaffolds for bone tissue engineering are addressed. Some modeling results and validation from different studies are presented as well.

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Section: Introductionmentioning

confidence: 90%

A Review on the Modeling of the Elastic Modulus and Yield Stress of Polymers and Polymer Nanocomposites: Effect of Temperature, Loading Rate and Porosity

et al. 2022

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“…Figure 2c shows that at a nano SiO2 doping concentration of 1 wt% and micron SiC doping concentration of 30 wt% or less, the ternary composite dielectric conductivity decreases compared to the micron composite, while the nonlinear slope increases compared to the EP-xSiC specimen. The dielectric conductivity is determined by the carrier concentration and carrier mobility [14,15]. In the EP/SiC/SiO2 ternary system, the impurity ions and electron conductivity are mainly used.…”

Section: Conductive Currentmentioning

confidence: 99%

“…In the EP/SiC/SiO2 ternary system, the impurity ions and electron conductivity are mainly used. Micro SiC filler, as a semiconductor crystal, has a narrow-forbidden bandwidth and a much higher probability of excitation of valence electrons than The dielectric conductivity is determined by the carrier concentration and carrier mobility [14,15]. In the EP/SiC/SiO 2 ternary system, the impurity ions and electron conductivity are mainly used.…”

Section: Conductive Currentmentioning

confidence: 99%

“…The regular arrangement of molecular chains due to the surface energy of nanoparticles may create a periodically changing potential field, but the arrangement of molecular chains may not reach the level of crystals, and their own forbidden bandwidth is much higher than that of semiconductors, so the irregular arrangement of individual nanoparticles cannot provide a crystal-like environment. When the concentration of nanoparticles increases, some of the nanoparticles have smaller spacing, the formed interfacial states overlap, and the interatomic degeneracy decreases significantly, the high-energy electrons can move freely in the periodic potential field formed in the interface, and the carrier concentration and conductivity in the local region increase at this time [14]. When the nano-doping concentration is low, the nano-dispersion is good, but the spacing is too far to form a conductive region that can affect the overall conductivity.…”

Section: Conductive Currentmentioning

confidence: 99%

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Properties and Simulating Research of Epoxy Resin/Micron-SiC/Nano-SiO2 Composite

et al. 2022

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The dielectric behavior of insulations is a key factor affecting the development of anti-corona materials for generators. Epoxy resin (EP), as the matrix, is blended with inorganic fillers of micron SiC and nano SiO2 to investigate the effect of micro and nano doping on the conductivity and breakdown mechanism of the composites. Using experimental and simulation analysis, it is found that the effect of nano-SiO2 doping concentration on the conductivity is related to the dispersion of SiC particles. The lower concentration of SiO2 could decrease the conductivity of the composites. The conductivity increases with raising the nano-SiO2 doping concentration to a critical value. Meanwhile, the breakdown field strength of the composites decreases with the rising content of SiC in constant SiO2 and increases with more SiO2 when mixed with invariable SiC. When an equivalent electric field is applied to the samples, the electric field at the interface of micron particles is much stronger than the average field of the dielectric, close to the critical electric field of the tunneling effect. The density of the homopolar space charge bound to the surface of the stator bar elevates as the concentration of filled nanoparticles increases, by which a more effective Coulomb potential shield can be built to inhibit the further injection of carriers from the electrode to the interior of the anti-corona layer, thus reducing the space charge accumulation in the anti-corona layer as well as increasing the breakdown field strength of the dielectric.

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“…The physical and mechanical properties of semi crystalline polymers are strongly affected by their microstructures, and the crystallization behavior will affect the formation of their microstructures. So far, many studies have introduced nano fillers [ 10 , 11 , 12 , 13 , 14 , 15 ] (for example, carbon nanotubes, carbon black, graphene, clay) to prepare nanocomposites to improve some properties of PET, such as improving crystallinity, conductivity, and interface properties. Among these nano fillers, carbon nanotubes are the most promising field in the research of nanocomposites, which have been widely used and added to polymer matrix [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties, Melting and Crystallization Behaviors, and Morphology of Carbon Nanotubes/Continuous Carbon Fiber Reinforced Polyethylene Terephthalate Composites

et al. 2022

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Carbon nanotube/continuous carbon fiber reinforced poly(ethylene terephthalate) (CNT/CCF/PET) composites are prepared by melt impregnating. The effects of CF and CNT content on the mechanical properties, melt and crystallization behaviors, and submicroscopic morphology of CNT/CCF/PET composites are studied. The tensile test results show that the increase of CF and the addition of appropriate amount of CNT improved the tensile strength and tensile modulus of the composites. When the content of CNT is 1.0 wt% and the content of CF is 56 wt%, the properties of the composites are the best, with tensile strength of 1728.7 MPa and tensile modulus of 25.1 GPa, which is much higher than that of traditional resin matrix composites. The results of dynamic mechanical analysis (DMA) show that the storage modulus of the composites increased with the increase of CF and CNT content. In particular, the addition of CNT greatly reduced the loss modulus of the composites. Morphological analysis show that the addition of CNT improved the fiber–matrix interface of the composite, which changes from fiber pull-out and fracture failure to fiber matrix fracture failure, and the fiber matrix interface is firmly bonded. In addition, there are polymer coated CNT protrusions on the surface of the fiber was observed. The results of differential scanning calorimetry (DSC) show that the melting temperature and crystallization temperature of the composites increased with the increase of CF content. The addition of CNT had little effect on the melting temperature of the composites, but it further improved the crystallization temperature of the composites. The effect of CNT content on the crystallization kinetics of the composites is studied. The non-isothermal crystallization kinetics of the composites is described by Jeziorny’s improved Avrami equation. The results show that CNT has a great influence on the crystallization type of the composites. As a nucleating agent, CNT has obvious heterogeneous nucleation effect in the composites, which improves the crystallization rate of PET.

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Predicting effective electrical resistivity and conductivity of carbon nanotube/carbon black-filled polymer matrix hybrid nanocomposites

Cited by 40 publications

References 46 publications

A Review on the Modeling of the Elastic Modulus and Yield Stress of Polymers and Polymer Nanocomposites: Effect of Temperature, Loading Rate and Porosity

A Review on the Modeling of the Elastic Modulus and Yield Stress of Polymers and Polymer Nanocomposites: Effect of Temperature, Loading Rate and Porosity

Properties and Simulating Research of Epoxy Resin/Micron-SiC/Nano-SiO2 Composite

Mechanical Properties, Melting and Crystallization Behaviors, and Morphology of Carbon Nanotubes/Continuous Carbon Fiber Reinforced Polyethylene Terephthalate Composites

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