定型相变热界面材料：低密度聚乙烯/石蜡/铝复合材料

李传常; 王卫萱; 曾小亮; 刘春轩; 孙蓉

doi:10.1007/s12613-022-2565-6

Volume 30 Issue 4

Apr. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(4): 772-781

Chuanchang Li, Weixuan Wang, Xiaoliang Zeng, Chunxuan Liu, and Rong Sun, Emerging low-density polyethylene/paraffin wax/aluminum composite as a form-stable phase change thermal interface material, Int. J. Miner. Metall. Mater., 30(2023), No. 4, pp. 772-781. https://doi.org/10.1007/s12613-022-2565-6

Cite this article as:

Chuanchang Li, Weixuan Wang, Xiaoliang Zeng, Chunxuan Liu, and Rong Sun, Emerging low-density polyethylene/paraffin wax/aluminum composite as a form-stable phase change thermal interface material, Int. J. Miner. Metall. Mater., 30(2023), No. 4, pp. 772-781. https://doi.org/10.1007/s12613-022-2565-6

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研究论文

定型相变热界面材料：低密度聚乙烯/石蜡/铝复合材料

1)
长沙理工大学能源与动力工程学院，长沙 410114，中国
2)
中国科学院深圳先进技术研究院, 深圳先进电子材料国际创新研究院，深圳 518055，中国
3)
湖南湘投轻材科技股份有限公司，长沙 410012，中国

通讯作者:
李传常 E-mail: chuanchangli@csust.edu.cn

文章亮点

(1) 制备的填充Al粉的PW/LDPE形成稳定的热界面材料。(2) LDPE可以很好地保持复合材料的结构稳定性。(3) 添加15wt%Al粉可提高PW/LDPE的导热系数67%。(4) 添加15wt%Al粉的复合材料具有优异的循环稳定性。

中文摘要

热界面材料在电子器件热管理中起着至关重要的作用，可显著降低接触热阻。由于固–液接触面之间的接触热阻比固–固接触面小得多，但传统的固–液相变材料存在易泄漏问题。因此，本研究工作研制了一种导热增强的定型相变热界面材料。通过石蜡(PW)和低密度聚乙烯(LDPE)的熔融共混，提高了PW的稳定性，PW/LDPE复合材料的泄漏率仅为0.8%，添加15wt%的Al粉提高其导热系数67%。此外，系统地研究了Al粉的添加对PW/LDPE基体的内部结构、热性能和相变行为的影响。系列结果证实，形状稳定的PW/LDPE/Al热界面材料在电子器件热管理领域具有良好的应用潜力。

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Research Article

Emerging low-density polyethylene/paraffin wax/aluminum composite as a form-stable phase change thermal interface material

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Abstract

Abstract

Thermal interface materials (TIMs) play a vital role in the thermal management of electronic devices and can significantly reduce thermal contact resistance (TCR). The TCR between the solid–liquid contact surface is much smaller than that of the solid–solid contact surface, but conventional solid–liquid phase change materials are likely to cause serious leakage. Therefore, this work has prepared a new form-stable phase change thermal interface material. Through the melt blending of paraffin wax (PW) and low-density polyethylene (LDPE), the stability is improved and it has an excellent coating effect on PW. The addition of aluminum (Al) powder improves the low thermal conductivity of PW/LDPE, and the addition of 15wt% Al powder improves the thermal conductivity of the internal structure of the matrix by 67%. In addition, the influence of the addition of Al powder on the internal structure, thermal properties, and phase change behavior of the PW/LDPE matrix was systematically studied. The results confirmed that the addition of Al powder improved the thermal conductivity of the material without a significant impact on other properties, and the thermal conductivity increased with the increase of Al addition. Therefore, morphologically stable PW/LDPE/Al is an important development direction for TIMs.
- paraffin wax;
- low-density polyethylene;
- phase change materials;
- thermal interface materials;
- form stability

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