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<p>Ice accumulation poses a significant threat to aviation safety and energy infrastructure. Photothermal superhydrophobic surfaces offer a promising anti-/deicing strategy; however, their excessive heat absorption in summer accelerates material degradation and exacerbates urban heat island effects, highlighting the urgent need for dynamic thermal regulation. In this study, we present a self-regulated photothermal storage superhydrophobic film with a trilayer design, comprising a photothermal phase-change base layer, a freeze-resistant thermochromic hydrogel interlayer, and a transparent superhydrophobic top layer. This multifunctional design enables seasonal adaptability, achieving 92% solar absorptance for efficient anti-/deicing in winter and 62% solar modulation to mitigate overheating in summer. This dual mode prolongs freezing time by 10-fold at −20 °C and lowers surface temperature by up to 17 °C in hot weather, demonstrating substantial potential for global building energy-savings. Additionally, its ultraviolet-blocking capability and durable superhydrophobicity ensure long-term durability performance in harsh environments. This work not only addresses the critical overheating challenge in photothermal materials but also advances the development of next-generation anti-icing systems.</p>

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A self-regulated photothermal anti-/deicing film for all-season applications

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年2月11日

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  • Jiayu Du,
  • Wenqi Wang,
  • Yang Fu,
  • Xin Li,
  • Jie Tan,
  • Hao Li,
  • Xu Chen,
  • Fuqiang Chu,
  • Qi Min,
  • Chi Yan Tso

摘要

Ice accumulation poses a significant threat to aviation safety and energy infrastructure. Photothermal superhydrophobic surfaces offer a promising anti-/deicing strategy; however, their excessive heat absorption in summer accelerates material degradation and exacerbates urban heat island effects, highlighting the urgent need for dynamic thermal regulation. In this study, we present a self-regulated photothermal storage superhydrophobic film with a trilayer design, comprising a photothermal phase-change base layer, a freeze-resistant thermochromic hydrogel interlayer, and a transparent superhydrophobic top layer. This multifunctional design enables seasonal adaptability, achieving 92% solar absorptance for efficient anti-/deicing in winter and 62% solar modulation to mitigate overheating in summer. This dual mode prolongs freezing time by 10-fold at −20 °C and lowers surface temperature by up to 17 °C in hot weather, demonstrating substantial potential for global building energy-savings. Additionally, its ultraviolet-blocking capability and durable superhydrophobicity ensure long-term durability performance in harsh environments. This work not only addresses the critical overheating challenge in photothermal materials but also advances the development of next-generation anti-icing systems.