A critical review of the preparation strategies of thermally conductive and electrically insulating polymeric materials and their applications in heat dissipation of electronic devices

Zhao, Chenggong; Li, Yifan; Liu, Yicheng; Xie, Huaqing; Yu, Wei

doi:10.1007/s42114-022-00584-2

Cited by 103 publications

(37 citation statements)

References 168 publications

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“…The mechanism of heat conduction in the XLPE is phonon heat conduction, which means the heat is carried away by lattice vibrations (phonons) [21]. The crystal structure interface, micropores, and additives are the anharmonicity in the thermal conductive network, thus leading to phonon scattering [22]. This is the reason for the formation of thermal resistance.…”

Section: Analysis Of the Temperature Field Effectmentioning

confidence: 99%

Influence of Combined Electrothermal Aging on Dielectric and Thermal Properties of HVAC XLPE Cable

Yang

Peng

et al. 2023

Energies

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To explore the influence of electrothermal aging on the properties of HVAC XLPE cable during its normal operation, two circuits of 110 kV XLPE cable were subjected to a combined electrothermal accelerated aging test for 180 days. The test voltage was set at 95 kV, and the test temperature was set at 90 °C. The constant temperature aging mode was adopted for one circuit, and the periodic thermal cycle aging mode was adopted for the other circuit. The dielectric property of the cable was diagnosed with dielectric spectroscopy measurement, and the thermal property was diagnosed with thermal parameters (thermal capacity and thermal resistance) measurement. Combined with Fourier infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC) measurements, morphological changes in the insulation under different electrothermal aging modes were analyzed to construct the correlation with the dielectric and thermal properties. The results show that the short-term electrothermal constant temperature aging mode effectively enhances the dielectric and thermal properties of the cable by modifying spherulite morphology and migrating polar compounds; the short-term electrothermal cycle aging mode also enhances the thermal properties of the cable due to the drop in small polar compounds. However, different distributions of polar compounds and crystal interfaces in the insulation lead to extreme distortion in the electric field distribution.

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Section: Analysis Of the Temperature Field Effectmentioning

confidence: 99%

Influence of Combined Electrothermal Aging on Dielectric and Thermal Properties of HVAC XLPE Cable

Yang

Peng

et al. 2023

Energies

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“…The study of the thermal conductivity of biochar-filled bioepoxy hemp fiber composite can provide valuable insights into the material’s thermal properties with potential practical implications in various fields, including insulating materials for buildings and thermal management systems for the devices, energy-efficient applications, material selection, and product design with positive impact to the environment. , The thermal conductivity of a material affects its heat transfer behavior. Its study in biocarbon-bioepoxy-hemp fiber composites can improve the understanding of the insulating efficiency of the material against heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Thermal Response of Biocarbon-Filled Hemp Fiber-Reinforced Bioepoxy Composites

2023

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We investigated the thermal conductivity of materials based on pyrolysis temperature, filler loading, filler size, and type of biomass feedstock. Hemp stalk and switchgrass were pyrolyzed at 450, 550, and 650 °C and crushed into 50, 75, and 100 μm particle sizes. Biocarbon fillers (10, 15, and 20 wt %) were added to the bioepoxy polymer matrix. The study showed increased filler loading and particle size increased thermal conductivity�the biocomposite samples with 20 wt % filler loading of 100 μm particle size of the biocarbon obtained at 650 °C showed the maximum thermal conductivity in both hemp biocarbon-filled composites (0.59 W•m −1 •K −1 ) and switchgrass-filled composites (0.58 W•m −1 •K −1 ) with the highest flame time. Biocarbon in biofiber-reinforced polymer composites can improve thermal conductivity and extend the flame time. These findings significantly contribute to developing hemp-based bioepoxy composite materials for thermal applications in various fields. These include insulating materials for buildings and thermal management systems, energy-efficient applications, and help in material selection and product design with a positive environmental impact.

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“…[1,2] Generally, polymer-based composites have been extensively accepted in thermal management with processability, electrical insulation, and low-cost advantages. [3,4] However, the intrinsic thermal conductivity (TC) of neat polymer, in the range of 0.2-0.5 W/(mÁK), cannot fulfill the thermal diffusion requirement of highpower electronic devices. [5,6] In order to obtain exceptionally thermally conductive polymers, several nanofillers, such as carbon-based nanomaterials (graphene, carbon nanotubes), [7][8][9] metal fillers (Ag, Cu, and Fe), [10][11][12] ceramic fillers (Al 2 O 3 , SiC, and BN), [13][14][15] and hybrid fillers [16][17][18] have been introduced in the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Improvement of “point‐plane”‐like hetero‐structured fillers on thermal conductivity of poly(vinyl alcohol) composites

Zhang

2023

Polymer Composites

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With the rapid growth of highly integrated electrical devices, the urgent demand for polymer composites with high thermal conductivity (TC) is increasing for effective thermal management. In this work, boron nitride nanosheets (BNNSs) were chemically grafted with aluminum oxide (Al2O3) to develop hetero‐structured filler (BNNSs@Al2O3). The BNNSs@Al2O3 fillers were uniformly dispersed in the poly(vinyl alcohol) (PVA) by solvent mixing, verified by SEM, and the oriented BNNSs@Al2O3/PVA composites were produced by the doctor blade method. The results exhibited that the synergistic effect of BNNSs and Al2O3 was achieved, and the thermal conductivities of BNNSs@Al2O3/PVA composites were improved. When keeping the filler content at 30 wt%, the in‐plane and out‐of‐plane TC of BNNSs@Al2O3/PVA composite reached 5.641 and 0.651 W/(m·K), respectively. The BNNSs@Al2O3 filler may improve the performance of composite heat dissipation by reducing the interfacial resistance between fillers and making it easier to establish directed heat‐transfer pathways. This composite demonstrates promising application in the field of electronic packaging.

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A critical review of the preparation strategies of thermally conductive and electrically insulating polymeric materials and their applications in heat dissipation of electronic devices

Cited by 103 publications

References 168 publications

Influence of Combined Electrothermal Aging on Dielectric and Thermal Properties of HVAC XLPE Cable

Influence of Combined Electrothermal Aging on Dielectric and Thermal Properties of HVAC XLPE Cable

Thermal Response of Biocarbon-Filled Hemp Fiber-Reinforced Bioepoxy Composites

Improvement of “point‐plane”‐like hetero‐structured fillers on thermal conductivity of poly(vinyl alcohol) composites

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