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首页> 外文期刊>Advanced Materials >Large-Scale Production of Rectorite Nanosheets and Their Co-Assembly with Aramid Nanofibers for High-Performance Electrical Insulating Nanopapers
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Large-Scale Production of Rectorite Nanosheets and Their Co-Assembly with Aramid Nanofibers for High-Performance Electrical Insulating Nanopapers

机译：Large-Scale Production of Rectorite Nanosheets and Their Co-Assembly with Aramid Nanofibers for High-Performance Electrical Insulating Nanopapers

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摘要

Compared with raw rectorite microplatelets (RMs), rectorite nanosheets(RNs) have considerably greater application prospects in the preparation ofadvanced composite materials because of their larger aspect ratio, higher surfacereactivity, and intrinsically superior mechanical and physical properties.However, the difficulty in the efficient preparation of RNs significantly limitstheir large-scale applications. Here, a scalable poly(vinylpyrrolidone)-assistedstirring approach is developed to prepare ultrathin RNs from the abundantnatural RMs. A higher production rate (≈0.675 g h~(?1)) is achieved comparedwith that of most other nanosheets. Additionally, instead of using conventionaltime- and energy-consuming high-speed centrifugation, an efficientpoly(dienedimethylammonium chloride)-assisted sedimentation strategy isproposed here to rapidly separate the exfoliated RNs from the RN dispersion.Then, the RNs are co-assembled with aramid nanofibers (ANFs) intolarge-scale nacre-mimetic ANF-RN nanopapers with considerably enhancedmechanical, electrical insulating, and high-temperature-resistant propertiescompared with pure ANF nanopapers and ANF-RM micropapers. Moreover,these properties are superior to those of previously reported ANF-basednanopapers and commercial insulating micropapers.

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