Polymer composites filled with core@double-shell structured fillers: Effects of multiple shells on dielectric and thermal properties

Zhou, Wenying; Kou, Yujia; Yuan, Mengxue; Li, Bo; Cai, Huiwu; Li, Zhen; Chen, Fuxin; Liu, Xiangrong; Wang, Guangheng; Chen, Qingguo; Dang, Zhi‐Min

doi:10.1016/j.compscitech.2019.107686

Cited by 113 publications

(59 citation statements)

References 43 publications

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“…The interfacial thermal resistance is influenced not only by the filler fraction but also by the topological structure of a thermally conductive network, such as the dispersion and orientation of fillers, contact area between fillers, and matrix-filler interaction (27,28). The structure of the thermally conductive network may play a vital role in thermal conductive composites (29,30). To obtain a continuous thermal conduction network, the surface of polymer granules is coated with thermally conductive fillers, and then composites with the segregated structure are constructed by compression molding.…”

Section: Introductionmentioning

confidence: 99%

Highly thermally conductive boron nitride@UHMWPE composites with segregated structure

Liu

et al. 2020

E-Polymers

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Highly thermally conductive boron nitride (BN)@ultra-high molecular weight polyethylene (UHMWPE) composites with the segregated structure were fabricated by powder mixing and hot pressing. Scanning electron microscopy and polarizing optical microscopy were used to analyze the dispersion of BN particles in the UHMWPE matrix. The morphology observation shows that BN particles are selectively located at the interfaces of UHMWPE particles and form continuous thermally conductive networks after the compression molding process. As a result, the thermal conductivity of the BN@UHMWPE composite increases to 3.37 W m−1 K−1 with 38.3 vol% BN, which is seven times larger than that of the pure UHMWPE. Furthermore, the incorporation of BN also influences the crystallinity and thermal properties of UHMWPE.

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Section: Introductionmentioning

confidence: 99%

Highly thermally conductive boron nitride@UHMWPE composites with segregated structure

Liu

et al. 2020

E-Polymers

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“…For polymer-based composites, the different characteristics of material are closely related to the dispersion and interfacial quality of the filler in the matrix. [25][26][27][28][29][30] In order to investigate the interfacial quality in the polymer composites, the fresh fracture surfaces of addition-type liquid silicone rubber composites were observed by SEM. The interfacial and dispersion quality of different filler in matrix of the ALSR Sample 1, 3, 5 and 7 are shown in Figure 1.…”

Section: Morphology Analysis Of Alsr Compositesmentioning

confidence: 99%

Thermal, electrical, and mechanical properties of addition‐type liquid silicone rubber co‐filled with Al₂O₃ particles and BN sheets

Feng

Zhang

Zha

et al. 2020

J of Applied Polymer Sci

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The addition‐type liquid silicone rubber (ALSR) co‐filled with spheroidal Al2O3 and flaky BN was prepared by the mechanical blending and hot press methods to enhance the thermal, electrical, and mechanical properties for industrial applications. Morphologies of ALSR composites were observed by scanning electron microscopy (SEM). It was found that the interaction and dispersion state of fillers in the ALSR matrix were improved by the introduction of BN sheets. Thermal, electrical, and mechanical performances of the ALSR composites were also investigated in this work. The result indicated that the thermal conductivity of ALSR can reach 0.64 W m−1 K−1 at the loading of 20 wt% Al2O3/20 wt% BN, which is 3.76 times higher than that of pure ALSR. The addition of Al2O3 particles and BN sheets also improve the thermal stability of ALSR composites. Moreover, pure ALSR and ALSR composites showed relatively lower dielectric permittivity (1.9–3.1) and dielectric loss factor (<0.001) at the frequency of 103 Hz. The insulation properties including volume resistivity and breakdown strength were improved by the introduction of flaky BN in the ALSR matrix. The volume resistivity and characteristic breakdown strength E0 are 6.68 × 1015 Ω m and 93 kV/mm, respectively, at the loading of 20 wt% Al2O3/20 wt% BN. In addition, the mechanical characteristics including elongation at break and tensile strength of ALSR composites were also enhanced by co‐filled fillers. The combination of these improved performances makes the co‐filled ALSR composites attractive in the field of electrical and electronic applications.

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“…Porous nanostructures, with great potential for supercapacitors, electromagnetic (EM) attenuation, catalysis, and biological medicine, are attracting growing interest [1][2][3][4][5][6][7][8][9][10][11]. A thorough comprehension of the growth mechanism significantly facilitates the tailoring of porous morphology and analysis of material properties.…”

Section: Introductionmentioning

confidence: 99%

A Nano-Micro Engineering Nanofiber for Electromagnetic Absorber, Green Shielding and Sensor

et al. 2020

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Highlights The role of electron transport characteristics in electromagnetic (EM) attenuation can be generalized to other EM functional materials. The integrated functions of efficient EM absorption and green shielding open the view of EM multifunctional materials. A novel sensing mechanism based on intrinsic EM attenuation performance and EM resonance coupling effect is revealed. Abstract It is extremely unattainable for a material to simultaneously obtain efficient electromagnetic (EM) absorption and green shielding performance, which has not been reported due to the competition between conduction loss and reflection. Herein, by tailoring the internal structure through nano-micro engineering, a NiCo2O4 nanofiber with integrated EM absorbing and green shielding as well as strain sensing functions is obtained. With the improvement of charge transport capability of the nanofiber, the performance can be converted from EM absorption to shielding, or even coexist. Particularly, as the conductivity rising, the reflection loss declines from − 52.72 to − 10.5 dB, while the EM interference shielding effectiveness increases to 13.4 dB, suggesting the coexistence of the two EM functions. Furthermore, based on the high EM absorption, a strain sensor is designed through the resonance coupling of the patterned NiCo2O4 structure. These strategies for tuning EM performance and constructing devices can be extended to other EM functional materials to promote the development of electromagnetic driven devices. Graphic Abstract

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Polymer composites filled with core@double-shell structured fillers: Effects of multiple shells on dielectric and thermal properties

Cited by 113 publications

References 43 publications

Highly thermally conductive boron nitride@UHMWPE composites with segregated structure

Highly thermally conductive boron nitride@UHMWPE composites with segregated structure

Thermal, electrical, and mechanical properties of addition‐type liquid silicone rubber co‐filled with Al₂O₃ particles and BN sheets

A Nano-Micro Engineering Nanofiber for Electromagnetic Absorber, Green Shielding and Sensor

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Polymer composites filled with core@double-shell structured fillers: Effects of multiple shells on dielectric and thermal properties

Cited by 113 publications

References 43 publications

Highly thermally conductive boron nitride@UHMWPE composites with segregated structure

Highly thermally conductive boron nitride@UHMWPE composites with segregated structure

Thermal, electrical, and mechanical properties of addition‐type liquid silicone rubber co‐filled with Al2O3 particles and BN sheets

A Nano-Micro Engineering Nanofiber for Electromagnetic Absorber, Green Shielding and Sensor

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Thermal, electrical, and mechanical properties of addition‐type liquid silicone rubber co‐filled with Al₂O₃ particles and BN sheets