【作者】 张燕； 张勇； 樊靖郁；

【Author】 Zhang Yan;Zhang Guoqiang;Fan Jingyu;School of Mechatronics Engineering and Automation, Shanghai University;Shanghai Institute of Applied Mathematics and Mechanics, School of Mechanics and Engineering Science, Shanghai University;

【机构】 上海大学,机电工程与自动化学院； 上海大学力学与工程科学学院,上海市应用数学和力学研究所；

【摘要】 碳纳米材料由于尺寸效应而呈现出优异的电学和热学性能,在诸多领域得到研发应用。石墨烯、碳纳米管等低维碳纳米材料的传导呈现明显各向异性,借助制备方法可以将低维的碳纳米材料构建形成三维网络结构,在与其他材料复合时可以增强热量在基体中的传递,从而更加提升复合材料热传导效果。本文根据以模板辅助结合化学气相沉积方法制备的三维结构碳纳米材料样品,采用分子动力学模拟研究当碳纳米片层之间存在不同堆叠排列时的热量传导特征,以及片层结构对散热的影响。更多还原

【Abstract】 Nanomaterials exhibit outstanding thermal and mechanical characteristics because of their size effects and have been applied in many fields. Low-dimensional carbon nanomaterials such as carbon nanotube and graphene are anisotropic due to their structural features. Three-dimensional network structures of the carbon nanosheets can be obtained by the preparation method so as to increase the heat transfer in the composite where the carbon nanomaterials are used as thermal conductive enhancers. In this paper, molecular dynamics simulations are carried out to investigate the thermal properties of graphene nanosheet stack. Influence factors including orientation angles of the nanosheets in the stack, number and size of the vertical structures are taken into consideration to analyze their impact on the heat transfer performances.更多还原