scholarly journals Research on the thermal conductivity and dielectric properties of AlN and BN co-filled addition-cure liquid silicone rubber composites

RSC Advances ◽  
2019 ◽  
Vol 9 (49) ◽  
pp. 28851-28856 ◽  
Author(s):  
Zhenzhen Ou ◽  
Feng Gao ◽  
Huaijun Zhao ◽  
Shumeng Dang ◽  
Lingjian Zhu
Keyword(s):  
Thermal Conductivity ◽  
Dielectric Properties ◽  
Boron Nitride ◽  
Aluminum Nitride ◽  
Silicone Rubber ◽  
Conductive Filler ◽  
Matrix Composites ◽  
Rubber Composites ◽  
Liquid Silicone Rubber ◽  
Liquid Silicone

The present work aims at studying the thermal and dielectric properties of addition-cure liquid silicone rubber (ALSR) matrix composites using boron nitride (BN) and aluminum nitride (AlN) as a hybrid thermal conductive filler.

Improving ablation properties of liquid silicone rubber composites by in situ construction of rich‐porous char layer

2020 ◽  
Vol 138 (11) ◽  
pp. 50030 ◽  
Author(s):  
Liwei Yan ◽  
Hao Zhang ◽  
Shengtai Zhou ◽  
Huawei Zou ◽  
Yang Chen ◽  
...  
Keyword(s):  
Silicone Rubber ◽  
Rubber Composites ◽  
Char Layer ◽  
Liquid Silicone Rubber ◽  
Liquid Silicone

scholarly journals Hypergravity-Induced Accumulation: A New, Efficient, and Simple Strategy to Improve the Thermal Conductivity of Boron Nitride Filled Polymer Composites

Polymers ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 459
Author(s):  
Kangkang Yu ◽  
Tao Yuan ◽  
Songdi Zhang ◽  
Chenlu Bao
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
Polymer Composites ◽  
Silicone Rubber ◽  
Raw Material ◽  
Rubber Composites ◽  
Advantages And Disadvantages ◽  
Simple Strategy ◽  
Relative Gravity ◽  
Gravity Acceleration

Thermal conductive polymer composites (filled type) consisting of thermal conductive fillers and a polymer matrix have been widely used in a range of areas. More than 10 strategies have been developed to improve the thermal conductivity of polymer composites. Here we report a new “hypergravity accumulation” strategy. Raw material mixtures of boron nitride/silicone rubber composites were treated in hypergravity fields (800–20,000 g, relative gravity acceleration) before heat-curing. A series of comparison studies were made. It was found that hypergravity treatments could efficiently improve the microstructures and thermal conductivity of the composites. When the hypergravity was about 20,000 g (relative gravity acceleration), the obtained spherical boron nitride/silicone rubber composites had highly compacted microstructures and high and isotropic thermal conductivity. The highest thermal conductivity reached 4.0 W/mK. Thermal interface application study showed that the composites could help to decrease the temperature on a light-emitting diode (LED) chip by 5 °C. The mechanism of the improved microstructure increased thermal conductivity, and the high viscosity problem in the preparation of boron nitride/silicone rubber composites, and the advantages and disadvantages of the hypergravity accumulation strategy, were discussed. Overall, this work has provided a new, efficient, and simple strategy to improve the thermal conductivity of boron nitride/silicone rubber and other polymer composites (filled type).

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