Temperature dependent thermal conductivity increase of aqueous nanofluid with single walled carbon nanotube inclusion

Sivasankaran Harish, Kei Ishikawa, Erik Einarsson, Shinya Aikawa, Taiki Inoue, Pei Zhao, Makoto Watanabe, Shohei Chiashi, Junichiro Shiomi, Shigeo Maruyama

    研究成果: Contribution to journalArticle査読

    50 被引用数 (Scopus)

    抄録

    We investigated the thermal and electrical conductivity of water seeded with single-walled carbon nanotubes (SWCNT) synthesized using the alcohol catalytic chemical vapour deposition method. Sodium deoxycholate was used as the surfactant to prepare stable nanofluids, which we then thoroughly characterized by microscopic and spectroscopic methods. Electrical conductivity measurements showed power law dependence with respect to SWCNT loading, while the thermal conductivity increase showed a linear dependence on loading. The effective thermal conductivity of the nanofluid was also found to increase with increasing temperature. Viscosity of the nanofluids showed a threefold increase compared to the thermal conductivity increase, which may play a crucial role in utilizing this fluid for practical applications. We compare experimental results with existing analytical models and discuss the critical role of thermal boundary resistance, which limits the improvement in thermal conductivity. Influence of SWCNT aggregation in the increase of effective thermal conductivity is also discussed.

    本文言語英語
    ページ(範囲)213-223
    ページ数11
    ジャーナルMaterials Express
    2
    3
    DOI
    出版ステータス出版済み - 9 2012

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)

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