文章基本信息

标题：Reduction of structural hierarchy translates into variable influence on the performance of boron nitride aerogel
本地全文：下载
作者：Jingjing Pan ; Jingyang Wang
期刊名称：iScience
印刷版ISSN：2589-0042
出版年度：2021
卷号：24
期号：3
页码：1-28
DOI：10.1016/j.isci.2021.102251
语种：English
出版社：Elsevier
摘要：SummaryThe rise of ceramic aerogel offers traditional ceramics a new window. Alongside the emerging prospects, what is open to explore includes the elegant design of a ceramic aerogel with tailorable inner organizations, what would occur when complex hierarchy exists in such an already intricate system, and how the properties get influenced as the complexity fades. Borrowing the wisdom from supramolecular world, we exquisitely transform BN aerogel from a complex hierarchy to a flatten microstructure based on solvent-induced morphology switch of its supramolecular precursor gel. Such reduction in structural hierarchy has insignificant effect on the thermal conductivity (∼0.027 W/(m·K)) but shifts the wettability from hydrophobicity to hydrophilicity and occasions nearly 3-fold difference in ion adsorption rate, as exemplified by lead ions. This work may promote the understanding of special hierarchy existing in delicate systems and inspire other attempts to harness the functionality of aerogels by manipulating structural hierarchy.Graphical abstractDisplay OmittedHighlights•Tuning the inner organizations of BN aerogel in light of supramolecular wisdom•Shifting the wettability from hydrophobicity to hydrophilicity•Structural hierarchy contributes to much higher adsorption rate for metal ions•Thermal insulation remains stable despite the change in microstructure featuresCeramics; Microstructure; Supramolecular Technologies