Dielectric properties and thermal conductivity of epoxy resin composite modified by Zn/ZnO/Al2O3 core–shell particles

Wang, Yang; Zhu, Longxiang; Zhou, Jun; Jia, Beibei; Jiang, Yingye; Wang, Junkai; Wang, Meng-Lan; Cheng, Yonghong; Wu, Kai

doi:10.1007/s00289-018-2581-x

Cited by 24 publications

(12 citation statements)

References 18 publications

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“…The component materials widely used at present can no longer meet the requirements of heat dissipation due to its low thermal conductivity and has faced a situation of renewal. 1,2 It is well known that the electronic components require not only good electrical properties, but also excellent thermal conductivity, mechanical strength and flexibility. 3 Ceramic and metal components which have been widely used can meet the requirements of components, but they are also suffering from various shortcomings, such as high brittleness, poor toughness, processing difficulty, high cost, etc.…”

Section: Introductionmentioning

confidence: 99%

Morphological, mechanical, and thermal properties of polyurethane nanocomposites co‐incorporated with micro‐Al₂O₃/nano‐Al₂O₃ for flexible thermal conductive component applications

Zhang

Yang

Yan

et al. 2022

J of Applied Polymer Sci

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Thermoplastic polyurethane (TPU) nanocomposites (TPU/μmAl2O3‐ACA/nmAl2O3) with excellent mechanical, thermal stability and thermal conductivity were fabricated by co‐incorporating aluminate coupling agent DL‐411 chemically functionalized micron Al2O3 (μmAl2O3‐ACA) and nano‐Al2O3 (nmAl2O3) through melt blending method. FTIR analysis indicated that DL‐411 has been successfully grafted on the surface of μmAl2O3, which was beneficial to the homogeneous dispersion of Al2O3 particles and enhancements of interfacial interactions between Al2O3 particles and TPU matrix. Adding μmAl2O3‐ACA and nmAl2O3 simultaneously showed obvious synergistic effects on improving the mechanical properties of TPU nanocomposites. The optimum mechanical properties were obtained at the mass ratio of μmAl2O3‐ACA to nmAl2O3 of 3:1. Both μmAl2O3‐ACA and nmAl2O3 particles were homogeneously dispersed, constructing relatively perfect thermal conductivity networks, as verified by FESEM and PLM observations. The thermal conductivity (k) of TPU nanocomposites increased continuously with the addition of μmAl2O3‐ACA/nmAl2O3 particles, and the optimal k (0.28 W/m K) was achieved when the mass ratio of μmAl2O3‐ACA to nmAl2O3 was 3:1, which increased by 53% compared with pure TPU (k = 0.183 W/m K). TGA showed that, in contrast to those of pure TPU, the maximum decomposition temperature of TPU/μmAl2O3‐ACA/nmAl2O3 nanocomposites increased by 77.77°C, and the decomposition activation energy of TPU nanocomposite enhanced by 178%.

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Section: Introductionmentioning

confidence: 99%

Morphological, mechanical, and thermal properties of polyurethane nanocomposites co‐incorporated with micro‐Al₂O₃/nano‐Al₂O₃ for flexible thermal conductive component applications

Zhang

Yang

Yan

et al. 2022

J of Applied Polymer Sci

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“…Research works related to epoxy composites filled with different types of core-shell particles can be found in the literature [ 18 , 19 , 20 , 21 , 22 ]. The results indicate that incorporation of the core-shell fillers, such as AlN@Al 2 O 3 particles or SiC@SiO 2 nanowires, can increase the storage modulus and improve the thermal conductivity [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…The results indicate that incorporation of the core-shell fillers, such as AlN@Al 2 O 3 particles or SiC@SiO 2 nanowires, can increase the storage modulus and improve the thermal conductivity [ 18 , 19 ]. Epoxy composites with multilayer core-shell structured fillers, like Si@SiO 2 @polydopamine and Zn@ZnO@Al 2 O 3 , show an increase in dielectric constant and a reduction in dielectric loss, and the thermal conductivity of the composites is also significantly improved [ 20 , 21 , 22 ]. Nevertheless, these studies only investigate a limited set of features, and there is not enough emphasis put on the complete analysis of all of the critical parameters, which are highly important from an application point of view.…”

Section: Introductionmentioning

confidence: 99%

Functional Polymer Composite with Core-Shell Ceramic Filler: II. Rheology, Thermal, Mechanical, and Dielectric Properties

Rybak

2021

Polymers

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Epoxy resin composites filled with ceramic particles are commonly applied in electrification devices as an electrical insulation. In order to maintain proper functionality of such apparatuses it is crucial to optimize a broad range of properties, such as thermal, mechanical and dielectric parameters. In an earlier paper, a novel core-shell filler was developed in order to enhance the thermal conductivity in the epoxy composite used as electrical insulation. The new filler was made of a standard material, which was covered by a thin layer of high thermally conductive shell, namely, alumina coated by aluminum nitride. It was previously shown that the epoxy resin filled with the core-shell Al2O3@AlN particles showed a significant increase in thermal conductivity with a 63% relative increase. In this paper, a set of complementary measurements was performed and analyzed, namely, rheology, tensile strength, dynamic mechanical analysis, and dilatometry. Moreover, the dielectric permittivity and strength, and electrical resistivity were investigated in order to check if the electrical insulation properties were maintained. The obtained results were compared with the epoxy composite filled with the standard filler. The rheological behavior of the core-shell filled system showed that the processability will not be hindered. The mechanical properties of the composite based on core-shell filler are better than those of the reference system. The coefficient of linear thermal expansion is lower for epoxy filled with core-shell filler, which can lead to better adhesion to internal parts in the electrification devices. The dielectric strength was enhanced by 16% for the core-shell filled epoxy. The investigation clearly demonstrates that the epoxy composite filled with the core-shell particles is an appropriate material for application as electrical insulation with enhanced thermal conductivity.

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“…In order to reduce the damage of material properties caused by a large amount of heat generated during the electrical operation, the excellent thermal conductivity of materials is increasingly required [3][4]. As one of the universal thermosetting polymers, epoxy (EP) has been widely used as electronic components due to its high mechanical properties, low creep property and good oxidation resistance [5][6][7]. The thermal conductivity of pure EP is within the range of 0.17-0.23 W/mK, which can basically meet the requirements of common electronic components and materials [8][9].…”

Section: Introductionmentioning

confidence: 99%

The Dielectric Properties and Thermal Conductivities of Epoxy Composites Reinforced by Titanium Dioxide

Jia

Yang

Dong

et al. 2021

J Inorg Organomet Polym

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To improve the dielectric properties and thermal conductivities of epoxy resins (EP), titanium dioxide super ne powders with microspheres structure (S-TiO 2 ) were prepared via a hydrothermal process based on the sodium dodecyl benzene sulfonate and hydroxyl silicate. The different content of S-TiO 2 was then employed as modi ers to add into EP resin to prepare the S-TiO 2 /EP composites. The structure and morphology of the prepared S-TiO 2 was observed by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and in uences of different addition of S-TiO 2 on the thermal conductivity of S-TiO 2 /EP composites are researched, while their dielectric constant and dielectric loss are also studied.The results suggested that the reasonable content of S-TiO 2 can endow the S-TiO 2 /EP composites with higher dielectric constant without excessive increase their dielectric loss even under the high frequency.Furthermore, the thermal conductivity of S-TiO 2 /EP are also be improved, which can be attributed to the good thermal conductivity of S-TiO 2 itself and the thermal conductivity path formed by S-TiO 2 inside the EP matrix.

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Dielectric properties and thermal conductivity of epoxy resin composite modified by Zn/ZnO/Al2O3 core–shell particles

Cited by 24 publications

References 18 publications

Morphological, mechanical, and thermal properties of polyurethane nanocomposites co‐incorporated with micro‐Al₂O₃/nano‐Al₂O₃ for flexible thermal conductive component applications

Morphological, mechanical, and thermal properties of polyurethane nanocomposites co‐incorporated with micro‐Al₂O₃/nano‐Al₂O₃ for flexible thermal conductive component applications

Functional Polymer Composite with Core-Shell Ceramic Filler: II. Rheology, Thermal, Mechanical, and Dielectric Properties

The Dielectric Properties and Thermal Conductivities of Epoxy Composites Reinforced by Titanium Dioxide

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Dielectric properties and thermal conductivity of epoxy resin composite modified by Zn/ZnO/Al2O3 core–shell particles

Cited by 24 publications

References 18 publications

Morphological, mechanical, and thermal properties of polyurethane nanocomposites co‐incorporated with micro‐Al2O3/nano‐Al2O3 for flexible thermal conductive component applications

Morphological, mechanical, and thermal properties of polyurethane nanocomposites co‐incorporated with micro‐Al2O3/nano‐Al2O3 for flexible thermal conductive component applications

Functional Polymer Composite with Core-Shell Ceramic Filler: II. Rheology, Thermal, Mechanical, and Dielectric Properties

The Dielectric Properties and Thermal Conductivities of Epoxy Composites Reinforced by Titanium Dioxide

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Product

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Morphological, mechanical, and thermal properties of polyurethane nanocomposites co‐incorporated with micro‐Al₂O₃/nano‐Al₂O₃ for flexible thermal conductive component applications

Morphological, mechanical, and thermal properties of polyurethane nanocomposites co‐incorporated with micro‐Al₂O₃/nano‐Al₂O₃ for flexible thermal conductive component applications