云母
材料科学
插层(化学)
韧性
极限抗拉强度
复合材料
化学工程
硅酸盐
纳米材料
化学
纳米技术
无机化学
工程类
作者
Hongkun Jiang,Lei Jiang,Peng Zhang,Xinyue Zhang,Ning Ma,Hao Wei
出处
期刊:Langmuir
[American Chemical Society]
日期:2021-04-21
卷期号:37 (17): 5131-5138
被引量:11
标识
DOI:10.1021/acs.langmuir.1c00001
摘要
Mica is a naturally abundant layered silicate mineral that has higher strength than other layered silicate minerals, but its inherent brittleness limits its application in some fields. In this work, mica was ultrasonically exfoliated into a single-layered nanomaterial after thermal activation, acidification, sodium replacement, and cetyltrimethylammonium bromide (CTAB) intercalation and then modified with ureido-pyrimidinone (UPy)-based PEG chains. Vacuum-assisted self-assembly was used to construct supramolecularly modified single-layered mica into bulk materials, in which the mica nanosheets were stacked into mica paper. The reversible quadruple hydrogen-bonded UPy moieties provided a high binding constant and significantly improved the strength and toughness of the obtained mica paper. These force-induced assembled mica papers showed significantly improved tensile strength and toughness compared with pure mica paper and simultaneously maintained the heat resistance of the mica materials, which may be good candidates for the substrates of flexible sensors working at higher temperatures.
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