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Issue 63, 2018, Issue in Progress
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Polydimethylsiloxane/aluminum oxide composites prepared by spatial confining forced network assembly for heat conduction and dissipation

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Abstract

Constructing a compacted network in polymer matrices is an important method to improve the thermal conductivity (TC) of polymer composites. In this paper, a compacted network was built using the Spatial Confining Forced Network Assembly (SCFNA) method. The homogeneous compound of polymer and fillers, prepared using a conical twin-screw mixer, was placed in a compression mold with confining space to carry out two-stage compression, free compression and spatial confining compression. Aluminum oxide (Al2O3) was studied as filler in a polydimethylsiloxane (PDMS) matrix to illustrate the applicability of the SCFNA method. The polymer composites with an Al2O3 filler ranging from 10 to 80 wt% were prepared. When the filler content was 80 wt%, the TC of the PDMS/Al2O3 composites prepared using the SCFNA method increased by 16.35 times in comparison to the TC of pure PDMS. Observing the SEM of PDMS/Al2O3 composites with various thicknesses, the gap between fillers decreased with a decrease in thickness. The composite with TC up to 2.566 W (mK)−1 obtained at 80 wt% filler was further employed as a heat spreader, causing a decrease of about 8.23 °C in the set-point compared with the temperature of the heat source.

Graphical abstract: Polydimethylsiloxane/aluminum oxide composites prepared by spatial confining forced network assembly for heat conduction and dissipation

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Publication details

The article was received on 31 Aug 2018, accepted on 15 Oct 2018 and first published on 23 Oct 2018


Article type: Paper
DOI: 10.1039/C8RA07229A
RSC Adv., 2018,8, 36007-36014
  • Open access: Creative Commons BY-NC license
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    Polydimethylsiloxane/aluminum oxide composites prepared by spatial confining forced network assembly for heat conduction and dissipation

    W. Si, X. He, Y. Huang, X. Gao, X. Zheng, X. Zheng, C. Leng, F. Su and D. Wu, RSC Adv., 2018, 8, 36007
    DOI: 10.1039/C8RA07229A

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