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High Thermal Conductivity and Radiative Cooling Designed Boron Nitride Nanosheets/Silk Fibroin Films for Personal Thermal Management.

Juncheng XiaXiangdong KongLinhong LiZhenbang ZhangYapeng ChenMaohua LiYue QinTao CaiWen DaiShuangquan FangJian YiCheng-Te LinKazuhito NishimuraNan JiangJinhong Yu
Published in: ACS applied materials & interfaces (2024)
The implementation of passive cooling strategies is crucial for transitioning from the current high-power- and energy-intensive thermal management practices to more environmentally friendly and carbon-neutral alternatives. Among the various approaches, developing thermal management materials with high thermal conductivity and emissivity for effective cooling of personal and wearable devices in both indoor and outdoor settings poses significant challenges. In this study, we successfully fabricated a cooling patch by combining biodegradable silk fibroin with boron nitride nanosheets. This patch exhibits consistent heat dissipation capabilities under different ambient conditions. Leveraging its excellent radiative cooling efficiency ( R solar = 0.89 and ε LWIR = 0.84) and high thermal conductivity (in-plane 27.58 W m -1 K -1 and out-plane 1.77 W m -1 K -1 ), the cooling patch achieves significant simulated skin temperature reductions of approximately 2.5 and 8.2 °C in outdoor and indoor conditions, respectively. Furthermore, the film demonstrates excellent biosafety and can be recycled and reused for at least three months. This innovative BNNS/SF film holds great potential for advancing the field of personal thermal management materials.
Keyphrases
  • air pollution
  • particulate matter
  • reduced graphene oxide
  • healthcare
  • quantum dots
  • primary care
  • tissue engineering
  • blood pressure
  • drug delivery
  • heart rate
  • metal organic framework
  • heavy metals
  • heat stress
  • soft tissue