scholarly journals Synergistic Effects of Boron Nitride (BN) Nanosheets and Silver (Ag) Nanoparticles on Thermal Conductivity and Electrical Properties of Epoxy Nanocomposites

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 426 ◽  
Author(s):  
Yunjian Wu ◽  
Xiaoxing Zhang ◽  
Ankit Negi ◽  
Jixiong He ◽  
Guoxiong Hu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Dielectric Properties ◽  
Boron Nitride ◽  
Polymer Composites ◽  
Synergistic Effects ◽  
High Thermal Conductivity ◽  
Epoxy Nanocomposites ◽  
Transfer Path ◽  
Low Dielectric ◽  
Low Permittivity

Polymer composites, with both high thermal conductivity and high electrical insulation strength, are desirable for power equipment and electronic devices, to sustain increasingly high power density and heat flux. However, conventional methods to synthesize polymer composites with high thermal conductivity often degrade their insulation strength, or cause a significant increase in dielectric properties. In this work, we demonstrate epoxy nanocomposites embedded with silver nanoparticles (AgNPs), and modified boron nitride nanosheets (BNNSs), which have high thermal conductivity, high insulation strength, low permittivity, and low dielectric loss. Compared with neat epoxy, the composite with 25 vol% of binary nanofillers has a significant enhancement (~10x) in thermal conductivity, which is twice of that filled with BNNSs only (~5x), owing to the continuous heat transfer path among BNNSs enabled by AgNPs. An increase in the breakdown voltage is observed, which is attributed to BNNSs-restricted formation of AgNPs conducting channels that result in a lengthening of the breakdown path. Moreover, the effects of nanofillers on dielectric properties, and thermal simulated current of nanocomposites, are discussed.

scholarly journals Surface modification of a BN/ETDS composite with aniline trimer for high thermal conductivity and excellent mechanical properties

RSC Advances ◽  
2018 ◽  
Vol 8 (40) ◽  
pp. 22846-22852 ◽  
Author(s):  
Seokgyu Ryu ◽  
Taeseob Oh ◽  
Jooheon Kim
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Surface Modification ◽  
Boron Nitride ◽  
Polymer Composites ◽  
Conductive Polymer ◽  
High Thermal Conductivity ◽  
Conductive Polymer Composites ◽  
Thermally Conductive

Boron nitride (BN) particles surface-treated with different amounts of aniline trimer (AT) were used to prepare thermally conductive polymer composites with epoxy-terminated dimethylsiloxane (ETDS).

Graphene Encapsulating Boron Nitride Electrostatic Assemblies for Fabrication of Polymer Composites with High Thermal Conductivity

2016 ◽  
Vol 25 (6) ◽  
pp. 096369351602500 ◽  
Author(s):  
Tao Huang ◽  
Yimin Yao ◽  
Fanling Meng
Keyword(s):  
Thermal Conductivity ◽  
Graphene Oxide ◽  
Boron Nitride ◽  
Polymer Composites ◽  
Reduced Graphene Oxide ◽  
Epoxy Resins ◽  
Thermal Reduction ◽  
High Thermal Conductivity ◽  
Reduced Graphene ◽  
Significant Attention

In the recent years, significant attention has been focused in insulating electronic encapsulation materials with high thermal conductivity. We fabricated reduced graphene oxide (RGO) encapsulated h-BN hybrids (h-BN@RGO) from the thermal reduction of electrostatically assembled h-BN@GO hybrids. It is found that the addition of h-BN@RGO fillers enhances the thermal conductivity of epoxy resins while preserving the electrical insulation. The thermal conductivity achieve 3.45 W.m−1.K−1, by adding 40 wt% h-BN@RGO, which is enhanced by 1643% compared with that of neat epoxy.

Aminopropyltrimethoxysilane-functionalized boron nitride nanotube based epoxy nanocomposites with simultaneous high thermal conductivity and excellent electrical insulation

2018 ◽  
Vol 6 (42) ◽  
pp. 20663-20668 ◽  
Author(s):  
Chi Zhang ◽  
Rongjin Huang ◽  
Yongguang Wang ◽  
Zhixiong Wu ◽  
Shibin Guo ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
Electrical Insulation ◽  
High Thermal Conductivity ◽  
Boron Nitride Nanotube ◽  
Epoxy Nanocomposites ◽  
Epoxy Nanocomposite ◽  
Ideal Dielectric

An ideal dielectric epoxy nanocomposite with high thermal conductivity is successfully fabricated utilizing aminopropyltrimethoxysilane-functionalized BNNTs.

scholarly journals Synergistic Enhancement of Thermal Conductivity and Dielectric Properties in Al2O3/BaTiO3/PP Composites

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1536 ◽  
Author(s):  
Junlong Yao ◽  
Li Hu ◽  
Min Zhou ◽  
Feng You ◽  
Xueliang Jiang ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Dielectric Properties ◽  
Polymer Composites ◽  
Volume Fraction ◽  
Dielectric Constants ◽  
High Thermal Conductivity ◽  
Al2o3 Nanoparticles ◽  
Pp Composites ◽  
Ceramic Fillers ◽  
High Dielectric

Multifunctional polymer composites with both high dielectric constants and high thermal conductivity are urgently needed by high-temperature electronic devices and modern microelectromechanical systems. However, high heat-conduction capability or dielectric properties of polymer composites all depend on high-content loading of different functional thermal-conductive or high-dielectric ceramic fillers (every filler volume fraction ≥ 50%, i.e., ffiller ≥ 50%), and an overload of various fillers (fthermal-conductive filler + fhigh-dielectric filler > 50%) will decrease the processability and mechanical properties of the composite. Herein, series of alumina/barium titanate/polypropylene (Al2O3/BT/PP) composites with high dielectric- and high thermal-conductivity properties are prepared with no more than 50% volume fraction of total ceramic fillers loading, i.e., ffillers ≤ 50%. Results showed the thermal conductivity of the Al2O3/BT/PP composite is up to 0.90 W/m·K with only 10% thermal-conductive Al2O3 filler, which is 4.5 times higher than the corresponding Al2O3/PP composites. Moreover, higher dielectric strength (Eb) is also found at the same loading, which is 1.6 times higher than PP, and the Al2O3/BT/PP composite also exhibited high dielectric constant ( ε r = 18 at 1000 Hz) and low dielectric loss (tan δ ≤ 0.030). These excellent performances originate from the synergistic mechanism between BaTiO3 macroparticles and Al2O3 nanoparticles.

Aluminum Borate/Boron Nitride Nanosheet Fibers for Enhancing the Thermal Conductivity of Polymer Composites

2021 ◽  
Vol 4 (2) ◽  
pp. 2136-2142
Author(s):  
Xiao Hou ◽  
Zhenbang Zhang ◽  
Xianzhe Wei ◽  
Yue Qin ◽  
Guichen Song ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Boron Nitride ◽  
Polymer Composites ◽  
Aluminum Borate ◽  
Boron Nitride Nanosheet
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