Scholarlink

<p>Balancing thermal management with mechanical buffering is critical for protecting outdoor devices and expanding their application scenarios. Here we propose a nacre-mimetic strategy that synergistically improves passive cooling and impact resistance through brick-and-mortar component regulation, surpassing numerous advanced high-performance composites. Dynamic crosslinking within the composition imparts non-absorption in specific spectral bands and strain-rate-dependent impact hardening. The as-designed composite exhibits a thermal anisotropy&#xa0;ratio of 44.47 and remains nonflammable under an 873 K flame for 1 h, releasing low-carbon gaseous products. It achieves solar reflectance and mid-infrared emittance of 0.97 at 393 K, translating to urban cooling energy savings exceeding 40%. The composite resists projectile penetration at 50 m s<sup>−1</sup>, and closed-loop recycling retains thermo-mechanical performance comparable to the pristine counterpart. Building on these attributes, we develop a thermo-mechanically coupled protective sandwich configuration featuring high volume resistivity and a low dielectric constant. This design delivers a maximum cooling effect of 20.5 K and dissipates 97.90% of the kinetic impact force in overheated outdoor devices. Life-cycle assessment quantifies a low environmental footprint. Collectively, this nacre-inspired paradigm illustrates sustainable multi-physics coupling management and holds strong promise for safeguarding outdoor devices in extremely harsh environments.</p>

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Collaborative passive cooling of impact-hardening interfaces enabled by nacre-mimetic design

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月22日

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  • Zimu Li,
  • Sheng Wang,
  • Shuai Liu,
  • Jianpeng Wu,
  • Wenhui Wang,
  • Zhentao Zhang,
  • Shilong Duan,
  • Liangyuan Qi,
  • Yuan Hu,
  • Xinglong Gong

摘要

Balancing thermal management with mechanical buffering is critical for protecting outdoor devices and expanding their application scenarios. Here we propose a nacre-mimetic strategy that synergistically improves passive cooling and impact resistance through brick-and-mortar component regulation, surpassing numerous advanced high-performance composites. Dynamic crosslinking within the composition imparts non-absorption in specific spectral bands and strain-rate-dependent impact hardening. The as-designed composite exhibits a thermal anisotropy ratio of 44.47 and remains nonflammable under an 873 K flame for 1 h, releasing low-carbon gaseous products. It achieves solar reflectance and mid-infrared emittance of 0.97 at 393 K, translating to urban cooling energy savings exceeding 40%. The composite resists projectile penetration at 50 m s−1, and closed-loop recycling retains thermo-mechanical performance comparable to the pristine counterpart. Building on these attributes, we develop a thermo-mechanically coupled protective sandwich configuration featuring high volume resistivity and a low dielectric constant. This design delivers a maximum cooling effect of 20.5 K and dissipates 97.90% of the kinetic impact force in overheated outdoor devices. Life-cycle assessment quantifies a low environmental footprint. Collectively, this nacre-inspired paradigm illustrates sustainable multi-physics coupling management and holds strong promise for safeguarding outdoor devices in extremely harsh environments.