Extraction of Boron Nitride Nanotubes and Fabrication of Macroscopic Articles Using Chlorosulfonic Acid

[摘要] Due to recent advances in high-throughput synthesis, research on boron nitride nanotubes (BNNTs) is moving towards applications. One future goal is the assembly of macroscopic articles of high aspect ratio, pristine BNNTs. However, these articles are presently unattainable because of insufficient purification and fabrication methods. We introduce a solution process for extracting BNNTs from synthesis impurities without sonication or the use of surfactants and proceed to convert the extracted BNNTs into thin films. The solution process can also be used to convert assynthesized material—which contains significant amounts of hexagonal boron nitride (h-BN)— into mats and foams with controllable structure and dimension. The scalable solution extraction method, combined with further advances in synthesis and purification, contributes to the development of all-BNNT macroscopic articles, such as fibers and 3-D structures.

[发布日期] 2018-02-06

[学科分类] 复合材料

[关键词] BORON NITRIDES;EXTRACTION;FABRICATION;FOAMS;HIGH ASPECT RATIO;IMPURITIES;NANOSTRUCTURE GROWTH;NANOTUBES;PURIFICATION;SURFACTANTS;THIN FILMS