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Thermal and Electrical Properties of Nanocomposites Based on Self-Assembled Pristine Graphene

机译：基于自组装原始石墨烯的纳米复合材料的热电性能

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摘要

Thermodynamically-driven exfoliation and self-assembly of pristine graphene sheets is shown to provide thermally and electrically functional polymer composites. The spreading of graphene sheets at a high energy liquid/liquid interface is driven by lowering the overall energy of the system, and provides for the formation of water-in-oil emulsions stabilized by overlapping graphene sheets. Polymerization of the oil phase, followed by removal of the dispersed water phase, produces inexpensive and porous composite foams. Contact between the graphene-stabilized water droplets provides a pathway for electrical and thermal transport through the composite. Unlike other graphene foams, the graphite used to synthesize these composites is natural flake material, with no oxidation, reduction, sonication, high temperature thermal treatment, addition of surfactants, or high shear mixing required. The result is an inexpensive, low-density material that exhibits Joule heating and displays increasing electrical conductivity with decreasing thermal conductivity.
机译：原始石墨烯片的热力学驱动剥离和自组装显示可提供具有热和电功能的聚合物复合材料。石墨烯片材在高能液/液界面处的扩散是通过降低系统的总能量来驱动的，并提供了通过重叠石墨烯片材而稳定的油包水乳液的形成。油相的聚合，然后除去分散的水相，产生了廉价且多孔的复合泡沫。石墨烯稳定的水滴之间的接触提供了通过复合材料进行电热传输的途径。与其他石墨烯泡沫不同，用于合成这些复合材料的石墨是天然薄片材料，无需氧化，还原，超声处理，高温热处理，添加表面活性剂或高剪切混合。结果是廉价的低密度材料，其表现出焦耳热并且显示出增加的电导率和降低的热导率。

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  • 来源
    《Advanced Functional Materials》 |2017年第1期|1604277.1-1604277.6|共6页
  • 作者

    Bento Jennifer L.; Brown Elizabeth; Woltornist Steven J.; Adamson Douglas H.;

  • 作者单位

    Dept Chem, Polymer Program, 97 North Eagleville Rd, Storrs, CT 06269 USA;

    Dept Chem, Polymer Program, 97 North Eagleville Rd, Storrs, CT 06269 USA;

    Dept Chem, Polymer Program, 97 North Eagleville Rd, Storrs, CT 06269 USA;

    Dept Chem, Polymer Program, 97 North Eagleville Rd, Storrs, CT 06269 USA;

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