| 石墨烯复合材料的有效热导率理论研究 |
| Alternative Title | Theoretical study on effective thermal conductivity of graphene polymer composites
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| 杨小龙 |
| Subtype | 学士
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| Thesis Advisor | 张娟娟
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| 2021-05-20
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| Degree Grantor | 兰州大学
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| Place of Conferral | 兰州
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| Degree Name | 理学学士
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| Degree Discipline | 理论与应用力学
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| Keyword | 石墨烯
导热率
界面热阻
长径比
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| Abstract | 石墨烯由于其优异的热学、力学、光学等方面的性能，自 2004 年被发现以 来就成为各个领域研究的焦点。而石墨烯复合材料兼具可设计的优化结构和可调 节的导热性能，成为现阶段最具发展前景的导热符合材料之一。本文利用有效介 质理论和声子失配模型，结合前人已有的相关工作，在考虑石墨烯-金属或非金 属基质的接触、石墨烯-石墨烯填料接触和温度三种影响因素的基础上，建立了 石墨烯复合材料的受热模型，推导了其有效导热率的理论与公式。随后利用相关 材料的实际数据，结合推导得到的理论公式，分别计算了石墨烯-环氧树脂和石 墨烯-铝材料的有效导热率，计算结果与目前已有的实验数据具有很高的吻合程 度。最后，结合实际对ᨀ高石墨烯复合材料有效热导率的方法进行了分析，分别 讨论了改变本文中所研究的相关影响因素在实际应用中的可行性，发现ᨀ高石墨 烯填料在复合材料中所占的比例将是ᨀ升石墨烯复合材料有效热导率最为可行 的方法。 |
| Other Abstract | Graphene has become the focus of research in various fields since it was discovered in 2004 due to its excellent thermal, mechanical, optical and other properties. The graphene composite material has both a designable optimized structure and adjustable thermal conductivity, and has become one of the most promising thermally conductive materials at this stage. In this paper, using the effective medium theory and the phonon mismatch model, combined with previous related work, it is established on the basis of considering the three influencing factors of graphene-polymer matrix contact, graphene-graphene filler contact and temperature The heating model of graphene polymer composite material is presented, and the theory and formula of its effective thermal conductivity are deduced. Subsequently, using the actual data of related materials, combined with the derived theoretical formulas, the effective thermal conductivity of graphene-epoxy and graphene-aluminum polymers were calculated respectively. The calculated results are in good agreement with the existing experimental data. degree. Finally, the methods for improving the effective thermal conductivity of graphene polymer composites are analyzed in combination with the actual situation, and the feasibility of changing the relevant influencing factors studied in this article in practical applications is discussed. It is found that the improvement of graphene fillers in composite materials The proportion of it will be the most feasible way to improve the effective thermal conductivity of graphene polymer composites. |
| Pages | 30
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| URL | 查看原文
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| Language | 中文
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| Document Type | 学位论文
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| Identifier | https://ir.lzu.edu.cn/handle/262010/462109
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| Collection | 土木工程与力学学院
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| Affiliation | 土木工程与力学学院
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| First Author Affilication | School of Civil Engineering and Mechanics
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Recommended Citation
GB/T 7714 |
杨小龙. 石墨烯复合材料的有效热导率理论研究[D]. 兰州. 兰州大学,2021.
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