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首页> 外文期刊>RSC Advances >Polydimethylsiloxane/aluminum oxide composites prepared by spatial confining forced network assembly for heat conduction and dissipation
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Polydimethylsiloxane/aluminum oxide composites prepared by spatial confining forced network assembly for heat conduction and dissipation

机译：通过空间限制强制网络组件制备的聚二甲基硅氧烷/氧化铝复合材料，用于导热和耗散

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摘要

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 degrees C in the set-point compared with the temperature of the heat source.
机译：在聚合物基质中构建压实的网络是改善聚合物复合材料的导热率（TC）的重要方法。本文使用空间限制强制网络组件（SCFNA）方法建立了一种压实的网络。使用锥形双螺杆混合器制备的聚合物和填料的均匀化合物置于压缩模具中，具有限制空间，以进行两级压缩，自由压缩和空间限制压缩。研究了氧化铝（Al 2O3）作为聚二甲基硅氧烷（PDMS）基质中的填料，以说明SCFNA方法的适用性。制备具有10至80wt％的Al 2 O 3填料的聚合物复合材料。当填料含量为80wt％时，与纯PDMS的Tc相比，使用SCFNA方法制备的PDMS / Al2O3复合材料的Tc增加了16.35倍。观察具有各种厚度的PDMS / AL2O3复合材料的SEM，填料之间的间隙随着厚度的降低而降低。具有在80wt％填料的高达2.566W（MK）（ - 1）的复合材料进一步用作散热器，与热源的温度相比，设定点导致设定点的约8.23摄氏度降低。

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  • 来源
    《RSC Advances》 |2018年第63期|共8页
  • 作者

    Si Wuyan; He Xiaoxiang; Huang Yao; Gao Xiaolong; Zheng Xiuting; Zheng Xupeng; Leng Chong; Su Fengchun; Wu Daming;

  • 作者单位

    Beijing Univ Chem Technol Coll Mech &

    Elect Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mech &

    Elect Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mech &

    Elect Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mech &

    Elect Engn Beijing 100029 Peoples R China;

    Minist Educ Polymer Mat Proc Equipment Engn Res Ctr Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mech &

    Elect Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mech &

    Elect Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mech &

    Elect Engn Beijing 100029 Peoples R China;

    Beijing Univ Chem Technol Coll Mech &

    Elect Engn Beijing 100029 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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