TY - JOUR
T1 - Core-shell structured BN/SiO2 nanofiber membrane featuring with dual-effect thermal management and flame retardancy for extreme space thermal protection
AU - Pan, Duo
AU - Han, Ziyuan
AU - Lei, Junting
AU - Niu, Yutao
AU - Liu, Hu
AU - Shin, Sunmi
AU - Liu, Chuntai
AU - Guo, Zhanhu
PY - 2025/1/6
Y1 - 2025/1/6
N2 - With the rapid progress of aerospace frontier engineering, the extreme space thermal environment has brought severe challenges to astronauts’ space suits, putting forward higher requirements for thermal protection materials. On this basis, a unique core-shell structured hexagonal boron nitride (h-BN)/silicon dioxide (SiO2) nanofiber membrane (HS) was prepared using the coaxial electrospinning method, of which both the thermal insulation SiO2 nanofiber cortex and the passive radiation cooling (PRC) h-BN nanofiber core make it a promising dual-effect thermal management material. Especially, when the amount of h-BN is 0.9 g, the resultant HS (HS0.9) exhibits astonishing low thermal conductivity of 0.026 W m−1 K−1 and high reflectivity and emissivity of exceeding 90% over an extremely wide range. The expected dual-effect thermal management performance enables the HS to have an ideal cooling effect under both high sunlight intensity and strong light radiation. In addition, HS also shows excellent flame retardant performance arising from the excellent high-temperature stability of h-BN and SiO2. What is more, the tensile strength of HS0.9 was also significantly increased from 0.42 to 7.2 MPa by encapsulating polyimide through vacuum filtration. Therefore, the research results of this work provide innovative highlights for high-temperature protection in daily life and even extreme space environments.
AB - With the rapid progress of aerospace frontier engineering, the extreme space thermal environment has brought severe challenges to astronauts’ space suits, putting forward higher requirements for thermal protection materials. On this basis, a unique core-shell structured hexagonal boron nitride (h-BN)/silicon dioxide (SiO2) nanofiber membrane (HS) was prepared using the coaxial electrospinning method, of which both the thermal insulation SiO2 nanofiber cortex and the passive radiation cooling (PRC) h-BN nanofiber core make it a promising dual-effect thermal management material. Especially, when the amount of h-BN is 0.9 g, the resultant HS (HS0.9) exhibits astonishing low thermal conductivity of 0.026 W m−1 K−1 and high reflectivity and emissivity of exceeding 90% over an extremely wide range. The expected dual-effect thermal management performance enables the HS to have an ideal cooling effect under both high sunlight intensity and strong light radiation. In addition, HS also shows excellent flame retardant performance arising from the excellent high-temperature stability of h-BN and SiO2. What is more, the tensile strength of HS0.9 was also significantly increased from 0.42 to 7.2 MPa by encapsulating polyimide through vacuum filtration. Therefore, the research results of this work provide innovative highlights for high-temperature protection in daily life and even extreme space environments.
KW - Core-shell structure
KW - Flame retardancy
KW - h-BN/SiO nanofiber membrane
KW - Passive radiative cooling
KW - Thermal insulation
UR - http://www.scopus.com/inward/record.url?scp=85215550390&partnerID=8YFLogxK
U2 - 10.1016/j.scib.2025.01.005
DO - 10.1016/j.scib.2025.01.005
M3 - Article
AN - SCOPUS:85215550390
SN - 2095-9273
SP - 1
EP - 11
JO - Science Bulletin
JF - Science Bulletin
ER -