Ferroelectric polymer/silver nanocomposites with high dielectric constant and high thermal conductivity

Huang, Xingyi; Jiang, Pingkai; Xie, Liyuan

doi:10.1063/1.3273368

Cited by 190 publications

(125 citation statements)

References 15 publications

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“…As expected, the k of all the RGO@SiO 2 /PDMS composites is largely decreased with an increase in frequency, suggesting a strong frequency dependence of k of all the composites. The strong dependence of k is ascribed to interfacial polarization effect (also named as the MaxwellWagner-Sillars (MWS) effect) of RGO@SiO 2 on PDMS molecules caused by the accumulation of many free charges at the internal interfaces between RGO@SiO 2 and PDMS [42]. Is has enough time to accumulate charge at the interfaces between RGO@SiO 2 and the rubber matrix at low frequency, resulting in the high k of the composites.…”

Section: Electromechanical Properties Of Go@sio 2 /Pdms Compositesmentioning

confidence: 99%

Simultaneously improved actuated performance and mechanical strength of silicone elastomer by reduced graphene oxide encapsulated silicon dioxide

Ning

Wang

Zhang

et al. 2015

International Journal of Smart and Nano Materials

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Herein, graphene oxide (GO)-encapsulated silica (SiO 2 ) hybrids (GO@SiO 2 ) were prepared via electrostatic self-assembly of the 3-aminopropyltriethoxysilane (APS)-modified SiO 2 and GO. The as-prepared GO@SiO 2 was introduced into polydimethylsiloxane (PDMS) elastomer to simultaneously increase the dielectric constant (k) and mechanical properties of PDMS. Then, the in situ thermal reduction of GO@SiO 2 / PDMS composites was conducted at 180°C for 2 h to increase the interfacial polarizability of GO@SiO 2 . As a result, the values of k at 1000 Hz are largely improved from 3.2 for PDMS to 13.3 for the reduced GO@SiO 2 (RGO@SiO 2 )/PDMS elastomer. Meanwhile, the dielectric loss of the composites remains low (<0.2 at 1000 Hz). More importantly, the actuated strain at low electric field (5 kV/mm) obviously increases from 0.3% for pure PDMS to 2.59% for the composites with 60 phr of RGO@SiO 2 , an eightfold increase in the actuated strain. In addition, both the tensile strength and elastic modulus are obviously improved by adding 60 phr of RGO@SiO 2 , indicating a good reinforcing effect of RGO@SiO 2 on PDMS. Our goal is to develop a simple and effective way to improve the actuated performance and mechanical strength of the PDMS dielectric elastomer for its wider application.

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Section: Electromechanical Properties Of Go@sio 2 /Pdms Compositesmentioning

confidence: 99%

Simultaneously improved actuated performance and mechanical strength of silicone elastomer by reduced graphene oxide encapsulated silicon dioxide

Ning

Wang

Zhang

et al. 2015

International Journal of Smart and Nano Materials

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“…The λ value of the Al/PVDF composite with 60 vol% Al reached approximately 1.74 W/mK, nearly seven times than that of the original PVDF matrix. Huang et al [138] prepared a series of thermally conductive Ag/PVDF nanocomposites, and the obtained λ value of the Ag/PVDF nanocomposite with 20 vol% Ag was significantly improved to 6.5 W/mK. Yu et al [139] reported a novel method to fabricate Cu-plated polystyrene (Cu-p-PS) composites with Cu thin film networks, created by the Cu metallization of PS bead and the hot press molding of Cu-plated PS beads (Fig.…”

Section: Metal Fillersmentioning

confidence: 99%

A review on thermally conductive polymeric composites: classification, measurement, model and equations, mechanism and fabrication methods

Yang

Liang

et al. 2018

Adv Compos Hybrid Mater

294

124

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With the fast-developing miniaturization and integration of microelectronics packaging materials, ultrahigh-voltage electrical devices, light-emitting diodes (LEDs), and in areas which require good heat dissipation and low thermal expansion, the investigations on the polymeric composites with highly thermal conductivities and excellent thermal stabilities are urgently required, which would be beneficial to transferring the heat to the outside of the products, finally to effectively avoid substantial overheating and prolong their working life. Our article reviews recent progress in the classification, measurement methods, model and equations, mechanisms, commonly used thermally conductive fillers, and the correlative fabrication methods for the thermally conductive polymeric composites, aiming to understand and grasp how to enhance the λ value effectively. And future perspectives, focusing scientific problems and technical difficulties of the present thermally conductive polymeric composites are also described and evaluated.

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“…As the thermal conductivity of epoxy systems is very low (about 0.2 W/(m!K)), thermally conductive fillers are added to these composites in order to dissipate the heat generated in electronic devices [6]. Various kinds of fillers, such as metals and metal oxides [7,8], aluminum nitride (AlN) [9][10][11], boron nitride (BN) [12], and silicon carbide (SiC) [13] have been applied to prepare thermally conductive polymer composites. Among them, AlN is a nontoxic, low cost substance, readily available as high purity powder.…”

Section: Introductionmentioning

confidence: 99%

Influence of nano-AlN particles on thermal conductivity, thermal stability and cure behavior of cycloaliphatic epoxy/trimethacrylate system

Yu¹,

Duan²,

Peng³

et al. 2011

Express Polym. Lett.

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Abstract.We have prepared a series of nano-sized aluminium nitride (nano-AlN)/cycloaliphatic epoxy/trimethacrylate (TMPTMA) systems and investigated their morphology, thermal conductivity, thermal stability and curing behavior. Experimental results show that the thermal conductivity of composites increases with the nano-AlN filler content, the maximum value is up to 0.47 W/(m!K). Incorporation of a small amount of the nano-AlN filler into the epoxy/TMPTMA system improves the thermal stability. For instance, the thermal degradation temperature at 5% weight loss of nano-AlN/ epoxy/TMPTMA system with only 1 wt% nano-AlN was improved by 8ºC over the neat epoxy/TMPTMA system. The effect of nano-AlN particles on the cure behavior of epoxy/TMPTMA systems was studied by dynamic differential scanning calorimetry. The results showed that the addition of silane treated nano-AlN particles does not change the curing reaction mechanism and silane treated nano-AlN particles could bring positive effect on the processing of composite since it needs shorter pre-cure time and lower pre-temperature, meanwhile the increase of glass transition temperature of the nanocomposite improves the heat resistance.

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Ferroelectric polymer/silver nanocomposites with high dielectric constant and high thermal conductivity

Cited by 190 publications

References 15 publications

Simultaneously improved actuated performance and mechanical strength of silicone elastomer by reduced graphene oxide encapsulated silicon dioxide

Simultaneously improved actuated performance and mechanical strength of silicone elastomer by reduced graphene oxide encapsulated silicon dioxide

A review on thermally conductive polymeric composites: classification, measurement, model and equations, mechanism and fabrication methods

Influence of nano-AlN particles on thermal conductivity, thermal stability and cure behavior of cycloaliphatic epoxy/trimethacrylate system

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