Enhancing the thermal and electrical conductivities of silicone rubber composites by constructing a <scp>1D‐3D</scp> collaborative network

Wang, Yan; Chen, Shubin; Cai, Yanchao; Lin, Tengfei; Gao, Min; Zhao, Chunlin; Wu, Xiao; Lin, Cong; Zhai, Rongyang; Liu, Jie

doi:10.1002/pc.26879

Cited by 10 publications

(5 citation statements)

References 61 publications

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“…Nowadays, matrix resins are usually reinforced by the use of thermal conductive filler 7,8 (e.g., metallic fillers, 9,10 carbon-based materials, [11][12][13][14][15] and ceramic fillers [16][17][18][19][20][21][22] ) to enhance the TC values. Among these, ceramic fillers (Al 2 O 3 , SiO 2 , AlN, Si 3 N 4 , MgO, and BN) have been widely investigated for their potential in thermal conductive and electrical insulation in composites due to their inherent properties.…”

Section: Introductionmentioning

confidence: 99%

Substantial improvement of thermal conductivity and mechanical properties of polymer composites by incorporation of boron nitride nanosheets and modulation of thermal curing reaction

He,

Zhang,

Liu

et al. 2023

Polymer Composites

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Thermal conductive polymer‐based composites synchronously with stable dielectric and excellent mechanical properties are urgently needed for high‐temperature‐resistant electronic devices. Here, a significant improvement in the thermal conductivity (TC), thermal stability, dielectric, and mechanical performance was simultaneously achieved in the polyarylene ether nitrile (PEN)/divinyl siloxane‐bisbenzocyclobutene (BCB) matrix through the incorporation of boron nitride nanosheets (BNNS) combined together with the post‐solid phase chemical reaction technique. The significant increase in the effective filler‐filler and filler‐crystal contacts in the composites was the main reason for the improvement in TC and dielectric constant. Besides, glass transition temperature (Tg) and mechanicals were enhanced in the presence of cross‐linked networks. By synchronously adding 15 vol% BNNS, the TC of composites after treatment reached up to 5.582 W/m.K, enhanced by 4.4 times higher than untreated. The dielectric constant was down to 2.93 at 1 MHz and the loss remained at a relatively low level. Meanwhile, the composite showed significantly enhanced thermal stability, mechanicals, and hydrophobicity (Tg = 336°C, T5% = 529°C, tensile strength and modulus was 94.5 MPa and 5.3 GPa, respectively, the contact angle was 101.76°). Thus, it promotes an effective strategy for fabricating a high‐performance‐polymer composite, which has the potential used in electronic materials.Highlights Crystallization‐crosslinking strategy optimizes overall performance. Crystals fill gaps between BNNS layers and connect thermal conductive pathway. Crosslinked networks limit molecular chain motion to reduce phonon scattering. The highest TC of the PEN/BCB/BNNS composite is up to 7.451 W/m.K. Thermal property shows significant improvement after crosslinking especially Tg.

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Section: Introductionmentioning

confidence: 99%

Substantial improvement of thermal conductivity and mechanical properties of polymer composites by incorporation of boron nitride nanosheets and modulation of thermal curing reaction

He,

Zhang,

Liu

et al. 2023

Polymer Composites

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“…This method made possible to create novel silicone rubber composites with superior thermal and electrical conductivity qualities. [ 11 ] To boost the thermal conductivity of silicone rubber, a significant amount of filler is normally needed. Alumina (Al 2 O 3 ) is regularly utilized filler in thermally conductive silicone rubber composites due to its advantages of insulation, low cost and good processability.…”

Section: Introductionmentioning

confidence: 99%

Investigation of charge dynamics in the corona‐aged silicone rubber alumina nanocomposite

et al. 2023

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The effect of corona aging on the surface potential dynamics and charge trap characteristics of silicone rubber alumina nanocomposite are examined using surface potential decay measurement. The aging was carried out by exposing the specimens to corona stress generated by a high‐frequency AC multi needle‐plane electrode system. The results show that the addition of alumina filler increases the surface potential decay time and maximum trap energy. A reduction in trap depth is observed with the corona aging, and the addition of alumina filler limits the degradation and change in charge trap distribution. The results of an analysis of the space charge behavior of different nanocomposites and their comparison are presented. The space charge variation analysis was carried out under the applied electric field of 20 kV/mm at room temperature using the pulsed electro‐acoustic technique (PEA). Based on the results, the charge density, electric field, and charge trap distribution were deduced. It is concluded that the space charge concentration and enhancement in the electric field of the aged material increases with aging duration and it is maximum in the case of 60 min corona‐aged pure silicone rubber. Analysis of the recovery of the charge dynamics of the sample after corona discharges at the different time intervals shows that the recovery of trap distribution is faster for a virgin sample and slower for the sample with 5 wt% of alumina.

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“…To enhance thermal conductivity of materials, considerable efforts have been made. The incorporation of carbon-based fillers, such as carbon black (CB), 5,6 carbon nanotubes (CNT), [7][8][9] and graphene nanosheets (GNPs), [10][11][12] into polymer matrix is one of the most common methods to develop highly thermally conductive composites. In the film field, the introduction of hetero-structured conductive fillers and the preparation of hierarchical films have been proposed to improve the thermal conductivity of films.…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermal properties of HDPE/EG nanocomposites via synergy of multi‐source pulsating flow and phase transition

Yin

Jiang

et al. 2023

Polymer Composites

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A new melt mixing and in‐situ exfoliation method based on the synergy of multi‐source pulsating flow and phase transition (MSPFPT) was reported. The corresponding device was also developed, and the structure and mixing process of the mixer were introduced in detail. High‐density polyethylene (HDPE)/expanded graphite (EG) composites were prepared via this new mixer, and microstructure and thermal properties of the composites were comprehensively investigated. Morphological analyses demonstrate that MSPFPT method promotes the efficient exfoliation and uniform dispersion of EG. The well‐exfoliated EG layers form more thermal conductive paths in the composites prepared by MSPFPT, increasing thermal conductivity from 0.47 of pure HDPE to 1.16 W/(m·K) with 9 wt.% EG. The crystallinity degree of HDPE is increased by 11.1%. The increment of crystallinity reduces phonon scattering, which further confirms that MSPFPT method can significantly improve the thermal performance. The research provides a practical strategy for fabricating high‐performance composites filled with layered fillers.

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Enhancing the thermal and electrical conductivities of silicone rubber composites by constructing a 1D‐3D collaborative network

Cited by 10 publications

References 61 publications

Substantial improvement of thermal conductivity and mechanical properties of polymer composites by incorporation of boron nitride nanosheets and modulation of thermal curing reaction

Substantial improvement of thermal conductivity and mechanical properties of polymer composites by incorporation of boron nitride nanosheets and modulation of thermal curing reaction

Investigation of charge dynamics in the corona‐aged silicone rubber alumina nanocomposite

Enhanced thermal properties of HDPE/EG nanocomposites via synergy of multi‐source pulsating flow and phase transition

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