Synergistic Enhancement of Thermal Conductivity and Dielectric Properties in Al2O3/BaTiO3/PP Composites

Yao, Junlong; Li, Hu; Zhou, Min; You, Feng; Jiang, Xueliang; Lin, Gao; Wang, Qing; Sun, Zhengguang; Wang, Jun

doi:10.3390/ma11091536

Cited by 32 publications

(19 citation statements)

References 57 publications

(80 reference statements)

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“…Ren et al [68] obtained the simultaneous enhancement on thermal and mechanical properties of PP composites by adding graphite platelets (GPs) and graphene sheets (GSs). Yao et al [69] to the pristine PP) was recorded. Cheewawuttipong et al [70] added BN and vaporgrown carbon fiber (VGCF) into the PP resin.…”

Section: Hybrid Materialsmentioning

confidence: 99%

Thermal Conductivity of Polypropylene-Based Materials

Patti¹,

Acierno²

2020

Polypropylene - Polymerization and Characterization of Mechanical and Thermal Properties

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In this work, the authors aimed to provide an overview about the thermal conductivity of polypropylene, of its related compounds and the main methods of measurement. The growing spread of polypropylene in the industrial world together with the increasing demand of thermally conductive plastics represented the driving force of studying the heat transport in the polypropylene, and of recent progress and development of the thermal conduction in polypropylene-based materials. At regard, the common approach has been devoted to fill the polymer with thermally conductive materials: metallic, carbon based, ceramic and mineral fillers have been taken into account depending on the need to preserve electrical insulation, lightweight, production increasing or cost saving in the final compositions. Different parameters have been considered in order to optimize the ultimate thermal performances in the realized composites: (i) filler dispersion, (ii) filler/ matrix and filler/filler interactions. The introduction of functional groups on the filler surface or in the polymer chain has been tested for acting on the dispersion and on the interfacial interaction. Then, hybrid materials, consisting in two particles different in size and shape combined with the attempt to realize a synergistic effect and to support a conductive network in the matrix, have been investigated.

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Section: Hybrid Materialsmentioning

confidence: 99%

Thermal Conductivity of Polypropylene-Based Materials

Patti¹,

Acierno²

2020

Polypropylene - Polymerization and Characterization of Mechanical and Thermal Properties

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“…It is worth mentioning that the thermal conductivity of the MWCNTs foams is similar to their BT/MWCNTs counterparts due to the low volumetric percentage of BT (as the maximum BT volume percentage is about 2 vol.%). Previous studies have shown that a large loading fractions (above 20 vol.%) of BT is needed to obtain a significant increase in the thermal conductivity of polymer composites [ 53 , 54 ].…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Highly Elastic Foams with Enhanced Electromagnetic Wave Absorption Based On Ethylene-Propylene-Diene-Monomer Rubber Filled with Barium Titanate/Multiwall Carbon Nanotube Hybrid

et al. 2020

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Hybrid ethylene-propylene-diene-monomer (EPDM) nanocomposite foams were produced via compression molding with enhanced electromagnetic wave absorption efficiency. The hybrid filler, consisting of 20 phr ferroelectric barium titanate (BT) and various loading fractions of multi-wall carbon nanotubes (MWCNTs), synergistically increased the electromagnetic (EM) wave absorption characteristics of the EPDM foam. Accordingly, while the EPDM foam filled with 20 phr BT was transparent to the EM wave within the frequency range of 8.2–12.4 GHz (X-band), the hybrid EPDM nanocomposite foam loaded with 20 phr BT and 10 phr MWCNTs presented a total shielding effectiveness (SE) of ~22.3 dB compared to ~16.0 dB of the MWCNTs (10 phr). This synergistic effect is suggested to be due to the segregation of MWCNT networks within the cellular structure of EPDM, resulting in enhanced electrical conductivity, and also high dielectric permittivity of the foam imparted by the BT particles. Moreover, the total SE of the BT/MWCNTs loaded foam samples remained almost unchanged when subjected to repeated bending due to the elastic recovery behavior of the crosslinked EPDM foamed nanocomposites.

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“…showed that the addition of the thermally conducting filler Al 2 O 3 decreased the dielectric strength of Al 2 O 3 /BaTiO 3 /PP, while the addition of a high dielectric constant filler material increased the dielectric strength in Al 2 O 3 /BaTiO 3 /PP [35].…”

Section: Dielectric and Thermally Conducting Fillersmentioning

confidence: 99%

“…[19]. With the help of a small-size ferroelectric ceramic filler, the high dielectric constant is obtained [1,4,35]. Ceramic nanofillers with large aspect ratio are preferred to their spherical counterparts for the improvement of of nanocomposites [36].…”

Section: Filler Materialsmentioning

confidence: 99%

Polymer Composites with Improved Dielectric Properties: A Review

Ghule

Laad

2021

Ukr. J. Phys.

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Materials exhibiting high dielectric constant (k) values find applications in capacitors, gate dielectrics, dielectric elastomers, energy storage device, while materials with low dielectric constant are required in electronic packaging and other such applications. Traditionally, high k value materials are associated with high dielectric losses, frequency-dependent dielectric behavior, and high loading of a filler. Materials with low k possess a low thermal conductivity. This creates the new challenges in the development of dielectric materials in both kinds of applications. Use of high dielectric constant filler materials increases the dielectric constant. In this study,the factors affecting the dielectric constant and the dielectric strength of polymer composites are explored. The present work aims to study the effect of various parameters affecting the dielectric properties of the materials. The factors selected in this study are the type of a polymer, type of a filler material used, size, shape, loading level and surface modification of a filler material, and method of preparation of the polymer composites. The study is focused on the dielectric enhancement of polymer nanocomposites used in the field of energy storage devices. The results show that the core-shell structured approach for high dielectric constant materials incorporated in a polymer matrix improves the dielectric constant of the polymer composite.

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Synergistic Enhancement of Thermal Conductivity and Dielectric Properties in Al2O3/BaTiO3/PP Composites

Cited by 32 publications

References 57 publications

Thermal Conductivity of Polypropylene-Based Materials

Thermal Conductivity of Polypropylene-Based Materials

Preparation and Characterization of Highly Elastic Foams with Enhanced Electromagnetic Wave Absorption Based On Ethylene-Propylene-Diene-Monomer Rubber Filled with Barium Titanate/Multiwall Carbon Nanotube Hybrid

Polymer Composites with Improved Dielectric Properties: A Review

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