材料科学
氮化硼
多孔性
热导率
保温
复合材料
超细纤维
热解
热稳定性
多孔介质
弹性(材料科学)
纳米技术
化学工程
工程类
图层(电子)
作者
Jianming Lin,Xiaohai Yuan,Gen Li,Yang Huang,Weijia Wang,Xin He,Chao Yu,Yi Fang,Zhenya Liu,Chengchun Tang
标识
DOI:10.1021/acsami.7b16198
摘要
As a kind of macroscopic boron nitride (BN) architectures, ultralight BN cellular materials with high porosity and great resilience would have a broad range of applications in energy and environment areas. However, creating such BN cellular materials in large sizes has still been proven challenging. Here, we report on the unique self-assembly of one-dimensional porous BN microfibers into an integral three-dimensional BN foam with open-cell cellular architectures. An ultrasonic-assisted self-assembly, freeze-drying, and high-temperature pyrolysis process has been developed for the preparation of cellular BN foam with a large size and desired shape. The developed BN foam has low density, high porosity (∼99.3%), great resilience, and excellent hydrophobic–lipophilic nature. The foam also exhibits excellent absorption capacities for a wide range of organic solvents and oils (wt % of ∼5130–7820%), as well as a high recovery efficiency (∼94%). Moreover, the unique hierarchical porous structure enables the foam to demonstrate a very low thermal conductivity (∼0.035 W/K/m). The excellent thermal insulation performance, superior mechanical property, and superb chemical and thermal stability enable the developed BN foam as an integrating multifunctional material in a broad range of high-end applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI