Constructing bioinspired hierarchical structure in polymer based energetic composites with superior thermal conductivity
| Autor: | Chengcheng Zeng, Songwei He, Yu Dai, Congmei Lin, Zhijian Yang, Xin Li, Guansong He |
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| Rok vydání: | 2019 |
| Předmět: |
Conductive polymer
Thermal shock Fabrication Materials science Graphene Mechanical Engineering Composite number 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Thermal conduction 01 natural sciences Industrial and Manufacturing Engineering 0104 chemical sciences law.invention Thermal conductivity Mechanics of Materials law Ceramics and Composites Composite material 0210 nano-technology Layer (electronics) |
| Zdroj: | Composites Part B: Engineering. 162:678-684 |
| ISSN: | 1359-8368 |
| Popis: | Inspired by the microlayered and highly oriented structure of naturally nacre, we reported a thermally conductive polymer based energetic composite constructed with an alternating microlayered structure, in which the one-dimensional (1D) CNTs filled layer acted as bridge to link the adjacent two-dimensional (2D) graphene filled layer. This ordered arrangement of microlayers was similar to the hierarchical ‘brick-and-mortar’ structure of nacre. As a result, the thermal conductivity (K) of composites with an artificial nacre-like structure was obviously higher than those with other structure designs, such as filled by pure graphene/CNTs, or hybrid graphene/CNTs. Moreover, the K enhancing effect could become more pronounced with the layer number due to the synergetic effect of microlayered structure. In addition, the nonlinear dependence of K on the layer number was well fitted by an analytical model which incorporated the synergetic effect. The thermal conduction mechanism could change from series thermal structure to parallel thermal structure with the layer number increasing. Finally, the calculated results of thermal shock resistance and thermal stress distribution confirmed that the enhanced thermal environment adaptability by the construction of alternating microlayered micro/nano-scale structure. This thought based on bioinspired engineering provides a creative opportunity for design and fabrication of novel thermally conductive materials. |
| Databáze: | OpenAIRE |
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