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Modulation of Interfacial Thermal Transport between Fumed Silica Nanoparticles by Surface Chemical Functionalization for Advanced Thermal Insulation

  • Takashi Kodama*
    Takashi Kodama
    Department of Mechanical Engineering, The University of Tokyo, Tokyo 113-856, Japan
    *Email: [email protected]
  • Nobuhiro Shinohara
    Nobuhiro Shinohara
    AGC Yokohama Technical Center, AGC, Inc., 1150 Uzawa-cho, Kanagawa-ku, Yokohama 230-0045, Japan
  • Shih-Wei Hung
    Shih-Wei Hung
    Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong 000000, China
  • Bin Xu
    Bin Xu
    Department of Mechanical Engineering, The University of Tokyo, Tokyo 113-856, Japan
    More by Bin Xu
  • Masanao Obori
    Masanao Obori
    Department of Mechanical Engineering, The University of Tokyo, Tokyo 113-856, Japan
  • Donguk Suh
    Donguk Suh
    Department of Mechanical Engineering, The University of Tokyo, Tokyo 113-856, Japan
    More by Donguk Suh
  • , and 
  • Junichiro Shiomi*
    Junichiro Shiomi
    Department of Mechanical Engineering, The University of Tokyo, Tokyo 113-856, Japan
    *Email: [email protected]
Cite this: ACS Appl. Mater. Interfaces 2021, 13, 15, 17404–17411
Publication Date (Web):April 11, 2021
https://doi.org/10.1021/acsami.0c11066
Copyright © 2021 American Chemical Society

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    Abstract

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    Since solid-state heat transport in a highly porous nanocomposite strongly depends on the thermal boundary conductance (TBC) between constituent nanomaterials, further suppression of the TBC is important for improving performance of thermal insulators. Here, targeting a nanocomposite fabricated by stamping fumed silica nanoparticles, we perform a wide variety of surface functionalizations on fumed silica nanoparticles by a silane coupling method and investigate the impact on the thermal conductivity (Km). The Km of the silica nanocomposite is approximately 20 and 9 mW/m/K under atmospheric and vacuum conditions at the material density of 0.2 g/cm3 without surface functionalization, respectively, and the experimental results indicate that the Km can be modulated depending on the chemical structure of molecules. The surface modification with a linear alkyl chain of optimal length significantly suppresses Km by approximately 30%, and the suppression can be further enhanced to approximately 50% with an infrared opacifier. The magnitude of suppression was found to sensitively depend on the length of the terminal chain. The magnitude is also related to the number of reactive silanol groups in the chemical structure, where the surface modification with fluorocarbon gives the largest suppression. The surface hydrophobization merits thermal insulation through significant suppression of the TBC, presumably by reducing the water molecules that otherwise would serve as heat conduction channels at the interface. On the other hand, when the chain length is long, the suppression is counteracted by the enhanced phonon transmission through the silane coupling molecules that grow with the chain length. This is supported by the analytical model and present simulation results, leading to prediction of the optimal chemical structure for better thermal insulation.

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    Cited By

    This article is cited by 6 publications.

    1. Beatriz Torres-Herrero, Ilaria Armenia, Maria Alleva, Laura Asín, Sonali Correa, Cecilia Ortiz, Yilian Fernández-Afonso, Lucía Gutiérrez, Jesús M. de la Fuente, Lorena Betancor, Valeria Grazú. Remote Activation of Enzyme Nanohybrids for Cancer Prodrug Therapy Controlled by Magnetic Heating. ACS Nano 2023, 17 (13) , 12358-12373. https://doi.org/10.1021/acsnano.3c01599
    2. Qiong Wu, Lixia Yang, Zhaofeng Chen, Mengmeng Yang, Tianlong Liu, Manna Li, Phalguni Mukhopadhyaya. SiO2 aerogel multiscale reinforced by glass fibers and SiC nanowhiskers for thermal insulation. Journal of Porous Materials 2023, 30 (5) , 1587-1596. https://doi.org/10.1007/s10934-023-01432-4
    3. Yixin Xu, Yanguang Zhou. Collaborative mechanisms boost the nanoscale boiling heat transfer at functionalized gold surfaces. International Journal of Heat and Mass Transfer 2023, 210 , 124179. https://doi.org/10.1016/j.ijheatmasstransfer.2023.124179
    4. Xiangrui Li, Wentao Chen, Gyoko Nagayama. Interfacial thermal resonance in an SiC–SiC nanogap with various atomic surface terminations. Nanoscale 2023, 15 (19) , 8603-8610. https://doi.org/10.1039/D3NR00533J
    5. Soumyadip Dutta, Nehil Shreyash, Bhabani Kumar Satapathy, Sampa Saha. Advances in design of polymer brush functionalized inorganic nanomaterials and their applications in biomedical arena. WIREs Nanomedicine and Nanobiotechnology 2023, 15 (3) https://doi.org/10.1002/wnan.1861
    6. Zhenhua Wu, Congcan Shi, Aotian Chen, Yike Li, Shuang Chen, Dong Sun, Changshun Wang, Zhufeng Liu, Qi Wang, Jianyu Huang, Yamei Yue, Shanfei Zhang, Zichuan Liu, Yizhuo Xu, Jin Su, Yan Zhou, Shifeng Wen, Chunze Yan, Yusheng Shi, Xu Deng, Lei Jiang, Bin Su. Large‐Scale, Abrasion‐Resistant, and Solvent‐Free Superhydrophobic Objects Fabricated by a Selective Laser Sintering 3D Printing Strategy. Advanced Science 2023, 10 (9) https://doi.org/10.1002/advs.202207183

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