Facile Preparation of Superelastic and Ultra low Dielectric Boron Nitride Nanosheet Aerogels via Freeze-Casting Process
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AbstractAs a structural analogue of graphene, boron nitride nanosheets (BNNSs) have attracted ever-growing research interest in the past few years, due to their remarkably mechanical, electrical, and thermal properties. The preparation of BNNS aerogels is considered to be one of the most effective approaches for their practical applications. However, it has remained a great challenge to fabricate BNNS aerogels with superelasticity by a facile method. Here, we report the preparation of BNNS aerogels via a facile method involving polymer-assisted cross-linking and freeze-casting strategies. The resulting aerogels exhibit a well-ordered and anisotropic microstructure, leading to anisotropic superelasticity, high compressive strength, and excellent energy absorption ability. The unique microstructure also endows the aerogels with ultralow dielectric constant (1.24) and loss (similar to 0.003). The successful fabrication of such fascinating materials paves the way for application of BNNSs in energy-absorbing services, catalyst carrier, and environmental remediation, etc.
All Author(s) ListZeng XL, Ye L, Yu SH, Sun R, Xu JB, Wong CP
Journal nameChemistry of Materials
Year2015
Month9
Day8
Volume Number27
Issue Number17
PublisherAMER CHEMICAL SOC
Pages5849 - 5855
ISSN0897-4756
eISSN1520-5002
LanguagesEnglish-United Kingdom
Web of Science Subject CategoriesChemistry; Chemistry, Physical; Materials Science; Materials Science, Multidisciplinary

Last updated on 2020-01-12 at 00:49