Thermal percolation network in Al<sub>2</sub>O<sub>3</sub> based thermal conductive polymer

Xu Hao-Zhe; Xu Xiang-Fan

doi:10.7498/aps.72.20221400

Abstract

Polymers incorporated with high thermal conductivity fillers have numerous applications in thermal interface materials. Plenty of efforts have been made to improve the thermal conductivity of polymer composite. A possible method is to choose fillers with different morphologies, which can combine the advantages of various fillers. However, owing to the limitations of the effective medium theory as well as lack of researches of thermal percolation, there is still little understanding of the synergistic mechanism of fillers with different morphologies. In order to avoid the coupling effect of different materials, this work uses the same kind of Al₂O₃ but with different morphologies to prepare different kinds of epoxy composites incorporated with spherical Al₂O₃, plate-like Al₂O₃ and fillers mixed of 1∶1 ratio. The thermal conductivity of each sample is measured by the steady state method. With the fitting of the thermal percolation theory, the synergistic effect of plate-like fillers and that of spherical fillers are verified to promote the formation of thermal percolation network. In addition, by observing the microscopic distribution of fillers, we try to explain the mechanism of this synergistic effect.

Keywords:

Authors and contacts

Center for Phononics and Thermal Energy Science, School of Physics Science and Engineering, Tongji University, Shanghai 200092, China

Corresponding author: Xu Xiang-Fan, xuxiangfan@tongji.edu.cn

Funds: Project supported by the Key-Area Research and Development Program of Guangdong Province, China (Grant No. 2020B010190004) and the National Natural Science Foundation of China (Grant Nos. 12174286, 11890703, 11935010).

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References

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[2]	Xu X F, Chen J, Zhou J, Li B W 2018 Adv. Mater. 30 1705544 Google Scholar
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Cited By

图 1 氧化铝/环氧树脂复合材料的制备流程示意图

Figure 1. Schematic illustration of the preparation of Al₂O₃/epoxy composites.

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图 2 测试原理

Figure 2. Testing principle.

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图 3 样品的总热阻-厚度关系图

Figure 3. Thermal resistance versus sample thickness.

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图 4 不同形貌的氧化铝/环氧树脂复合材料的热导率以及理论拟合图线

Figure 4. The thermal conductivity of different kinds of Al₂O₃/epoxy composites and theoretical fitting line.

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图 5 协同作用机制的示意图

Figure 5. Schematic diagram of the synergistic mechanism.

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图 6 氧化铝/环氧树脂复合材料的SEM照片　(a) 球形氧化铝分散性; (b) 球形氧化铝的接触; (c) 片状氧化铝的导热通路; (d) 片状氧化铝的接触; (e) 1∶1混合添加的导热通路; (f) 1∶1混合添加的整体分散性

Figure 6. SEM images of Al₂O₃/epoxy composites: (a) The dispersion of spherical Al₂O₃; (b) the mutual contact of spherical Al₂O₃; (c) the thermal conductive pathway of plate-like Al₂O₃; (d) the mutual contact of plate-like Al₂O₃; (e) the thermal conductive pathway of fillers mixed of 1∶1 ratio; (f) the dispersion of Al₂O₃ of fillers mixed of 1∶1 ratio.

DownLoad: Full-Size Img PowerPoint

[1]	Li S, Zheng Q, Lü Y, Liu X, Wang X, Huang P Y, Cahill D G, Lü B 2018 Science 361 579 Google Scholar
[2]	Xu X F, Chen J, Zhou J, Li B W 2018 Adv. Mater. 30 1705544 Google Scholar
[3]	Tian F, Ren Z F 2019 Angew. Chem. Int. Ed. 58 5824 Google Scholar
[4]	Chen J, Huang X Y, Zhu Y K, Jiang P K 2017 Adv. Funct. Mater. 27 1604754 Google Scholar
[5]	Lin M Y, Li Y H, Xu K, Ou Y H, Su L F, Feng X, Li J, Qi H S, Liu D 2019 Compos. Sci. Technol. 175 85 Google Scholar
[6]	Li X X, Yan Y P, Dong L, Guo J, Aiyiti A, Xu X F, Li B W 2017 J. Phys. D: Appl. Phys. 50 104002 Google Scholar
[7]	Wang L M, Liu Y C, Zhang Z M, Wang B R, Qiu J J, Hui D, Wang S 2017 Compos. B. Eng. 122 145 Google Scholar
[8]	Choy C L 1977 Polymer 18 984 Google Scholar
[9]	Henry A 2014 Annu. Rev. Heat Transf. 17 485 Google Scholar
[10]	Feng H, Tang N, An M, Guo R L, Ma D K, Yu X X, Zang J F, Yang N 2019 J. Phys. Chem. C 123 31003 Google Scholar
[11]	Zhang C, Huang R J, Wang Y G, Wu Z X, Guo S B, Zhang H, Li J, Huang C J, Wang W, Li L F 2018 J. Mater. Chem. A 6 20663 Google Scholar
[12]	Zhang T, Sun J J, Ren L L, Yao Y M, Wang M M, Zeng X L, Sun R, Xu J B, Wong C P 2019 Compos. Part A Appl. Sci. Manuf. 121 92 Google Scholar
[13]	Lu C H, Chiang S W, Du H, Li J, Gan L, Zhang X, Chu X D, Yao Y W, Li B H, Kang F Y 2017 Polymer 115 52 Google Scholar
[14]	Deng S C, Yuan J L, Lin Y L, Yu X X, Ma D K, Huang Y W, Ji R C, Zhang G Z, Yang N 2021 Nano Energy 82 105749 Google Scholar
[15]	Zhang W B, Zhang Z X, Yang J H, Huang T, Zhang N, Zheng X T, Wang Y, Zhou Z W 2015 Carbon 90 242 Google Scholar
[16]	Li Z L, Ju D D, Han L J, Dong L S 2017 Thermochim. Acta. 652 9 Google Scholar
[17]	McCue J P 1973 Coord. Chem. Rev. 10 265 Google Scholar
[18]	Bruggeman D A G 1935 Ann. Phys. 416 636 Google Scholar
[19]	Wang Y W, Weng G J, Meguid S A, Hamouda A M 2014 J. Appl. Phys. 115 193706 Google Scholar
[20]	Kim G H, Lee D, Shanker A, Shao L, Kwon M S, Gidley D, Kim J, Pipe K P 2015 Nat. Mater. 14 295 Google Scholar
[21]	Coleman J N, Khan U, Blau W J, Gun’ko Y K 2006 Carbon 44 1624 Google Scholar
[22]	Zheng R, Gao J, Wang J, Feng S P, Ohtani H, Wang J, Chen G 2012 Nano Lett. 12 188 Google Scholar
[23]	Shi B, Dong L, Li M Q, Liu B, Kim K, Xu X F, Zhou J, Liu J 2018 Appl. Phys. Lett. 113 041902 Google Scholar
[24]	潘东楷, 宗志成, 杨诺 2022 物理学报 71 086302 Google Scholar Pan D K, Zong Z C, Yang N 2022 Acta Phys. Sin. 71 086302 Google Scholar
[25]	Kempers R, Kolodner P, Lyons A, Robinson A J 2009 Rev. Sci. Instrum. 80 095111 Google Scholar
[26]	Prasher R S, Simmons C, Solbrekken G L 2000 ASME 2000 International Mechanical Engineering Congress and Exposition Orlando, Florida, USA, November 5–10, 2000 p461
[27]	Wu Y M, Ye K, Liu Z D, Wang M J, Chee K W, Lin C T, Jiang N, Yu J 2018 J. Mater. Chem. C 6 6494 Google Scholar
[28]	Chen X K, Hu X Y, Jia P, Xie Z X, Liu J 2021 Int. J. Mech. Sci. 206 106576 Google Scholar
[29]	Liu C Q, Chen C, Yu W, Chen M, Zhou D Y, Xie H Q 2020 Int. J. Therm. Sci. 152 106293 Google Scholar
[30]	Mehra N, Mu L W, Ji T, Yang X T, Kong J, Gu J W, Zhu J H 2018 Appl. Mater. Today 12 92 Google Scholar
[31]	Fang Z N, Li M, Wang S K, Gu Y Z, Li Y X, Zhang Z G 2019 Int. J. Heat Mass Transfer 137 1103 Google Scholar
[32]	Eucken A 1940 Forsch. Ingenieurwes. A 11 6 Google Scholar
[33]	Chen H Y, Ginzburg V V, Yang J, Yang Y F, Liu W, Huang Y, Du L B, Chen B 2016 Prog. Polym. Sci. 59 41 Google Scholar
[34]	Fuller J J, Marotta E E 2001 J. Therm. Heat Transfer 15 228 Google Scholar
[35]	Hill R F, Supancic P H 2005 J. Am. Ceram. Soc. 87 1831 Google Scholar
[36]	Zhang G Q, Xia Y P, Wang H, Tao Y, Tao G L, Tu S T, Wu H P 2009 J. Compos. Mater. 44 963 Google Scholar

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Vol. 72, Issue 2 - 2023-01-20

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Thermal percolation network in Al₂O₃ based thermal conductive polymer

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Corresponding author: Xu Xiang-Fan, xuxiangfan@tongji.edu.cn

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Thermal percolation network in Al2O3 based thermal conductive polymer

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Corresponding author: Xu Xiang-Fan, xuxiangfan@tongji.edu.cn

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Thermal percolation network in Al₂O₃ based thermal conductive polymer