1 research outputs found
High Thermal Conductivity and Radiative Cooling Designed Boron Nitride Nanosheets/Silk Fibroin Films for Personal Thermal Management
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 (Rsolar = 0.89 and εLWIR = 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