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Reversible two-way tuning of thermal conductivity in an end-linked star-shaped thermoset

Author

Listed:
  • Chase M. Hartquist

    (Massachusetts Institute of Technology)

  • Buxuan Li

    (Massachusetts Institute of Technology)

  • James H. Zhang

    (Massachusetts Institute of Technology)

  • Zhaohan Yu

    (Michigan State University)

  • Guangxin Lv

    (Massachusetts Institute of Technology)

  • Jungwoo Shin

    (Massachusetts Institute of Technology)

  • Svetlana V. Boriskina

    (Massachusetts Institute of Technology)

  • Gang Chen

    (Massachusetts Institute of Technology)

  • Xuanhe Zhao

    (Massachusetts Institute of Technology
    Massachusetts Institute of Technology)

  • Shaoting Lin

    (Massachusetts Institute of Technology
    Michigan State University)

Abstract

Polymeric thermal switches that can reversibly tune and significantly enhance their thermal conductivities are desirable for diverse applications in electronics, aerospace, automotives, and medicine; however, they are rarely achieved. Here, we report a polymer-based thermal switch consisting of an end-linked star-shaped thermoset with two independent thermal conductivity tuning mechanisms—strain and temperature modulation—that rapidly, reversibly, and cyclically modulate thermal conductivity. The end-linked star-shaped thermoset exhibits a strain-modulated thermal conductivity enhancement up to 11.5 at a fixed temperature of 60 °C (increasing from 0.15 to 2.1 W m−1 K−1). Additionally, it demonstrates a temperature-modulated thermal conductivity tuning ratio up to 2.3 at a fixed stretch of 2.5 (increasing from 0.17 to 0.39 W m−1 K−1). When combined, these two effects collectively enable the end-linked star-shaped thermoset to achieve a thermal conductivity tuning ratio up to 14.2. Moreover, the end-linked star-shaped thermoset demonstrates reversible tuning for over 1000 cycles. The reversible two-way tuning of thermal conductivity is attributed to the synergy of aligned amorphous chains, oriented crystalline domains, and increased crystallinity by elastically deforming the end-linked star-shaped thermoset.

Suggested Citation

  • Chase M. Hartquist & Buxuan Li & James H. Zhang & Zhaohan Yu & Guangxin Lv & Jungwoo Shin & Svetlana V. Boriskina & Gang Chen & Xuanhe Zhao & Shaoting Lin, 2024. "Reversible two-way tuning of thermal conductivity in an end-linked star-shaped thermoset," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-49354-2
    DOI: 10.1038/s41467-024-49354-2
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    References listed on IDEAS

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