材料科学
气凝胶
多孔性
氮化硼
复合材料
凯夫拉
纳米片
热的
纳米点
六方氮化硼
纳米技术
石墨烯
复合数
物理
气象学
作者
Hu Long,Yaming Hu,Jiaxin Liu,Wei Wang,Guanglan Liao,Anthony Chun Yin Yuen,Guan Heng Yeoh,Yuan Hu,Tielin Shi
标识
DOI:10.1021/acsami.4c09506
摘要
With rapid advancements in aerospace and supersonic aircraft technology, there is a growing demand for multifunctional thermal protective materials. Aerogels, known for their low density and high porosity, have garnered significant attention in this regard. However, developing a lightweight multifunctional aerogel that combines exceptional thermal and mechanical properties through a straightforward and time-efficient method remains a significant challenge. Herein, a facile and universal approach is developed for the preparation of Kevlar/hexagonal boron nitride (h-BN) aerogels, in which a spin-assisted method is applied to create robust microribbons and further accelerate solvent displacement. The resulting microribbon scaffold, with its entangled nanofiber-nanosheet morphologies, exhibits sufficient strength to prevent volume shrinkage during drying, thereby allowing precise control over aerogel density. The porous hybrid aerogels, featuring controllable geometric characteristics and tailored densities ranging from 6.9 to 100 mg cm
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