Improved dielectric properties and thermal conductivity of PVDF composites filled with core–shell structured Cu@CuO particles

Zhou, Wenying; Zhang, Fan; Yuan, Mengxue; Li, Bo; Peng, Jiangtao; Lv, Yunqi; Cai, Huiwu; Liu, Xiangrong; Chen, Qingguo; Dang, Zhi‐Min

doi:10.1007/s10854-019-02189-w

Cited by 41 publications

(19 citation statements)

References 37 publications

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“…The method of adding fillers is a fast way to improve the thermal conductivity of polymers. Metal materials (such as copper powder [ 7 , 8 , 9 ], silver powder [ 10 , 11 ], metal sheet and wire [ 12 , 13 , 14 ]), carbon materials (such as carbon fiber (CF) [ 15 , 16 , 17 ], graphene material [ 18 , 19 ], graphite material [ 20 , 21 ], carbon nanotubes [ 22 , 23 ], carbon black [ 24 , 25 ]), inorganic fillers (such as aluminum nitride [ 26 , 27 ], boron nitride [ 28 , 29 , 30 ], silicon nitride [ 31 , 32 ], silicon carbide [ 33 ], alumina [ 34 , 35 ]) and other high thermal conductivity fillers are often used to improve the thermal conductivity of polymers. When the particulate filler content is small, it is difficult to significantly improve the thermal conductivity of the matrix.…”

Section: Introductionmentioning

confidence: 99%

3D Thermal Network Supported by CF Felt for Improving the Thermal Performance of CF/C/Epoxy Composites

Jiang

Zheng

et al. 2021

Polymers

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The heat generated by a high-power device will seriously affect the operating efficiency and service life of electronic devices, which greatly limits the development of the microelectronic industry. Carbon fiber (CF) materials with excellent thermal conductivity have been favored by scientific researchers. In this paper, CF/carbon felt (CF/C felt) was fabricated by CF and phenolic resin using the “airflow network method”, “needle-punching method” and “graphitization process method”. Then, the CF/C/Epoxy composites (CF/C/EP) were prepared by the CF/C felt and epoxy resin using the “liquid phase impregnation method” and “compression molding method”. The results show that the CF/C felt has a 3D network structure, which is very conducive to improving the thermal conductivity of the CF/C/EP composite. The thermal conductivity of the CF/C/EP composite reaches 3.39 W/mK with 31.2 wt% CF/C, which is about 17 times of that of pure epoxy.

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Section: Introductionmentioning

confidence: 99%

3D Thermal Network Supported by CF Felt for Improving the Thermal Performance of CF/C/Epoxy Composites

Jiang

Zheng

et al. 2021

Polymers

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“…The conduction loss factor of polymer composites is calculated by the eq where σ dc and f are the DC conductivity and frequency, respectively …”

Section: Resultsmentioning

confidence: 99%

Insights into Synchronously Enhanced Dielectric Properties and Thermal Conductivity of β-SiC_w/PVDF Nanocomposites by Building a Crystalline SiO₂ Shell as an Interlayer

Cao

Zhou

Zhang

et al. 2022

Ind. Eng. Chem. Res.

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Polymeric nanocomposites possessing high dielectric constant (k) without an unacceptably large increase in dielectric loss (k″) and excellent thermal conductivity (TC) are extremely desirable in microelectronics. In this study, a crystalline SiO 2 shell (silicon dioxide shell) was constructed on the surface of β-silicon carbide whiskers (β-SiC w , denoted as whisker-0) under air by high-temperature oxidation, and the obtained core−shellstructured β-SiC w @SiO 2 whiskers (denoted as calcined whiskers) were composited with poly(vinylidene fluoride) (PVDF) to deliberately generate morphology-controllable high-k, low-loss, and high-TC nanocomposites. The results show that the calcined whisker/PVDF nanocomposites reveal extremely low k″ and conductivity in comparison to the whisker-0/PVDF analogues because the insulating SiO 2 interlayer prevents direct contact among whisker-0 and therefore remarkably suppresses the long-range charge migration. In particular, both the loss and conductivity tend to regularly reduce with increasing thickness of the SiO 2 shell while maintaining a high k. Simultaneously, the constructed crystalline SiO 2 interlayer compatibilizes the whisker-0 filler with the PVDF matrix via hydrogen bonding while restraining the interfacial thermal resistance and facilitating phonon transport at interfaces, resulting in increased TC of the nanocomposites compared to amorphous SiO 2 -encapsulated whisker-0 counterparts. 50 wt % calcined whisker/PVDF nanocomposites have rather good dielectric performances such as a very low k″ of 0.08 (100 Hz) and a greatly improved TC of 2.41 W/m K, compared with 1957 and 2.1 W/m K for 50 wt % whisker-0/PVDF nanocomposites, respectively. The synchronous enhancement in both dielectric properties and TC makes the nanodielectrics show appealing prospective applications in microelectronic and electrical industries.

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“…The increase in dielectric constant can be ascribed to the Maxwell-Wagner-Sillars effect, indicating that interfacial polarization can occur in heterogeneous phases with different electrical conductivities. 26 Moreover, the decrease in dielectric constant with increasing frequency is attributed to the dipolar polarization of the groups in the composites, and the interface polarization between fillers and PA12 matrix cannot keep up with the increase in frequency. 27 Meanwhile, Figure 7B illustrates the dielectric loss value of PA12 composites.…”

Section: Dielectric Properties Of Pa12 Compositesmentioning

confidence: 99%

Hybrid of multi‐dimensional fillers for thermally enhanced polyamide 12 composites fabricated by selective laser sintering

Yuan

Hu²,

et al. 2021

Polymer Composites

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Selective laser sintering (SLS) is an additive manufacturing technology that can provide a novel strategy to manufacture complex polymer-based composites with tailored properties. In this study, polyamide 12 (PA12) composite powders based on Al 2 O 3 , boron nitride (BN), and carbon nanotubes (CNTs) were prepared via a two-step mixing approach. Morphology characterization techniques indicated that the fillers were uniformly dispersed in the PA12 matrix as expected. Under the optimum 3D-printing parameters, the fabrication of SLS parts with high filler loading could be obtained. With 40 wt% Al 2 O 3 , 8 wt% BN, and 2 wt% CNT hybrid fillers, the thermal conductivity of PA12 composites could reach 1.09 W/mK. It could be attributed to the synergistic effect of multi-dimensional fillers to form dense and continuous thermal conduction paths. The factors influencing the performance of PA12 composites such as melting and crystallization behaviors, dielectric properties, and mechanical properties were also discussed. The results show that these composites have favorable dielectric and mechanical properties. Overall, the PA12 composites fabricated by SLS technology in this study exhibit excellent thermal management ability.

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Improved dielectric properties and thermal conductivity of PVDF composites filled with core–shell structured Cu@CuO particles

Cited by 41 publications

References 37 publications

3D Thermal Network Supported by CF Felt for Improving the Thermal Performance of CF/C/Epoxy Composites

3D Thermal Network Supported by CF Felt for Improving the Thermal Performance of CF/C/Epoxy Composites

Insights into Synchronously Enhanced Dielectric Properties and Thermal Conductivity of β-SiC_w/PVDF Nanocomposites by Building a Crystalline SiO₂ Shell as an Interlayer

Hybrid of multi‐dimensional fillers for thermally enhanced polyamide 12 composites fabricated by selective laser sintering

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Improved dielectric properties and thermal conductivity of PVDF composites filled with core–shell structured Cu@CuO particles

Cited by 41 publications

References 37 publications

3D Thermal Network Supported by CF Felt for Improving the Thermal Performance of CF/C/Epoxy Composites

3D Thermal Network Supported by CF Felt for Improving the Thermal Performance of CF/C/Epoxy Composites

Insights into Synchronously Enhanced Dielectric Properties and Thermal Conductivity of β-SiCw/PVDF Nanocomposites by Building a Crystalline SiO2 Shell as an Interlayer

Hybrid of multi‐dimensional fillers for thermally enhanced polyamide 12 composites fabricated by selective laser sintering

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Insights into Synchronously Enhanced Dielectric Properties and Thermal Conductivity of β-SiC_w/PVDF Nanocomposites by Building a Crystalline SiO₂ Shell as an Interlayer