Simultaneously enhance thermal conductive property and mechanical properties of silicon rubber composites by introducing ultrafine Al2O3 nanospheres prepared via thermal plasma

Ouyang, Yuge; Li, Xiaofei; Ding, Fei; Bai, Lin; Yuan, Fangli

doi:10.1016/j.compscitech.2020.108019

Cited by 55 publications

(23 citation statements)

References 68 publications

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“…The B-Al2O3 fillers were prepared by a heat treatment of nanospherical Al2O3 at 1250 °C for 4.5 h. The preparation method and particle characteristics of spherical Al2O3 were presented in our previous papers [40]. The SR matrix (polydimethylsiloxane) was purchased from Wacker Chemical (China) Co., Ltd (Shanghai, China).…”

Section: Methodsmentioning

confidence: 99%

A Novel Branched Al2O3/Silicon Rubber Composite with Improved Thermal Conductivity and Excellent Electrical Insulation Performance

Ouyang

Tian

et al. 2021

Nanomaterials

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In this paper, we report a thermal conductive polymer composite that consists of silicone rubber (SR) and branched Al2O3 (B-Al2O3). Owing to the unique two-dimensional branched structure, B-Al2O3 particles form a continuous three-dimensional network structure by overlapping each other in the matrix, serving as a continuous heat conductive pathway. As a result, the polymer composite with a 70 wt% filler achieves a maximum thermal conductivity of 1.242 Wm−1 K−1, which is equivalent to a significant enhancement of 521% compared to that of a pure matrix. In addition, the composite maintains a high volume resistivity of 7.94 × 1014 Ω·cm with the loading of 70 wt%, indicating that it meets the requirements in the field of electrical insulation. Moreover, B-Al2O3 fillers are well dispersed (no large agglomerates) and form a strong interfacial adhesion with the matrix. Therefore, the thermal decomposition temperature, residual mass, tensile strength, modulus and modulus of toughness of composites are significantly improved simultaneously. This strategy provides new insights for the design of high-performance polymer composites with potential application in advanced thermal management in modern electronics.

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Section: Methodsmentioning

confidence: 99%

A Novel Branched Al2O3/Silicon Rubber Composite with Improved Thermal Conductivity and Excellent Electrical Insulation Performance

Ouyang

Tian

et al. 2021

Nanomaterials

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“…Thermal plasma synthesis is the most efficient technique for producing metal and ceramic nanopowders in continuous and scalable way [ 81 , 82 , 83 , 84 , 85 , 86 , 87 ]. In addition to the characteristics of high temperature, high energy density, and the fast cooling rate of a thermal plasma, radio frequency (RF) induction plasma has no electrode pollution and provides a controllable atmosphere [ 88 , 89 ].…”

Section: Plasma-enhanced Exothermic Reactionmentioning

confidence: 99%

Progress in Preparation of ZrB2 Nanopowders Based on Traditional Solid-State Synthesis

2021

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ZrB2 is of particular interest among ultra-high temperature ceramics because it exhibits excellent thermal resistance at high temperature, as well as chemical stability, high hardness, low cost, and good electrical and thermal conductivity, which meet the requirements of high-temperature components of hyper-sonic aircraft in extreme environments. As raw materials and basic units of ultra-high temperature ceramics and their composites, ZrB2 powders provide an important way for researchers to improve material properties and explore new properties by way of synthesis design and innovation. In recent years, the development of ZrB2 powders’ synthesis method has broken through the classification of traditional solid-phase method, liquid-phase method, and gas-phase method, and there is a trend of integration of them. The present review covers the most important methods used in ZrB2 nanopowder synthesis, focusing on the solid-phase synthesis and its improved process, including modified self-propagating high-temperature synthesis, solution-derived precursor method, and plasma-enhanced exothermic reaction. Specific examples and strategies in synthesis of ZrB2 nano powders are introduced, followed by challenges and the perspectives on future directions. The integration of various synthesis methods, the combination of different material components, and the connection between synthesis and its subsequent application process is the trend of development in the future.

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“…Ouyang et al [79] used high-frequency thermal plasma to treat Al 2 O 3 nanospheres as thermally conductive fillers to prepare Al 2 O 3 /silicon rubber (SR) composites (as shown in Figure 16a,b). The Al 2 O 3 /SR composites possessed a superior λ of 1.53 W/m•K and volume resistivity (as shown in Figure 16c,d).…”

Section: Boron Nitrides/polymer Compositesmentioning

confidence: 99%

Recent Advances in Preparation, Mechanisms, and Applications of Thermally Conductive Polymer Composites: A Review

Zhang

Zhou

et al. 2020

J. Compos. Sci.

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At present, the rapid accumulation of heat and the heat dissipation of electronic equipment and related components are important reasons that restrict the miniaturization, high integration, and high power of electronic equipment. It seriously affects the performance and life of electronic devices. Hence, improving the thermal conductivity of polymer composites (TCPCs) is the key to solving this problem. Compared with manufacturing intrinsic thermally conductive polymer composites, the method of filling the polymer matrix with thermally conductive fillers can better-enhance the thermal conductivity (λ) of the composites. This review starts from the thermal conduction mechanism and describes the factors affecting the λ of polymer composites, including filler type, filler morphology and distribution, and the functional surface treatment of fillers. Next, we introduce the preparation methods of filled thermally conductive polymer composites with different filler types. In addition, some commonly used thermal-conductivity theoretical models have been introduced to better-analyze the thermophysical properties of polymer composites. We discuss the simulation of λ and the thermal conduction process of polymer composites based on molecular dynamics and finite element analysis methods. Meanwhile, we briefly introduce the application of polymer composites in thermal management. Finally, we outline the challenges and prospects of TCPCs.

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Simultaneously enhance thermal conductive property and mechanical properties of silicon rubber composites by introducing ultrafine Al2O3 nanospheres prepared via thermal plasma

Cited by 55 publications

References 68 publications

A Novel Branched Al2O3/Silicon Rubber Composite with Improved Thermal Conductivity and Excellent Electrical Insulation Performance

A Novel Branched Al2O3/Silicon Rubber Composite with Improved Thermal Conductivity and Excellent Electrical Insulation Performance

Progress in Preparation of ZrB2 Nanopowders Based on Traditional Solid-State Synthesis

Recent Advances in Preparation, Mechanisms, and Applications of Thermally Conductive Polymer Composites: A Review

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