Core-shell structured BN/SiO_(2)nanofiber membrane featuring with dual-effect thermal management and flame retardancy for extreme space thermal protection  

具有双效热管理及阻燃特性的核壳结构BN/SiO_(2)纳米纤维膜用于极端空间热防护

作　　者：Duo Pan Ziyuan Han Junting Lei Yutao Niu Hu Liu Sunmi Shin Chuntai Liu Zhanhu Guo 潘朵;韩自圆;雷钧霆;牛宇涛;刘虎;Sunmi Shin;刘春太;郭占虎

机构地区：[1]State Key Laboratory of Structural Analysis,Optimization and CAE Software for Industrial Equipment,National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450001,China [2]Key Laboratory of Multifunctional Nanomaterials and Smart Systems,Advanced Materials Division,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China [3]Department of Mechanical Engineering,College of Design and Engineering,National University of Singapore,Singapore 117575,Singapore [4]Mechanical and Construction Engineering,Faculty of Engineering and Environment,Northumbria University,Newcastle Upon Tyne,NE18ST,UK

出　　处：《Science Bulletin》2025年第5期722-732,共11页科学通报(英文版)

基　　金：Postdoctoral Fellowship Program(Grade B)of China Postdoctoral Science Foundation(GZB20240675);National Natural Science Foundation of China(52373093 and 12072325);Excellent Youth Found of Natural Science Foundation of Henan Province(242300421062);National Key R&D Program of China(2019YFA0706802);111 Project(D18023).

摘　　要：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(SiO_(2))nanofiber membrane(HS)was prepared using the coaxial electrospinning method,of which both the thermal insulation SiO_(2)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 SiO_(2).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.

关 键 词：h-BN/SiO_(2)nanofiber membrane Core-shell structure Passive radiative cooling Thermal insulation Flame retardancy 

分 类 号：TB3[一般工业技术—材料科学与工程]