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Novel Fabrication of Basalt Nanosheets with Ultrahigh Aspect Ratios Toward Enhanced Mechanical and Dielectric Properties of Aramid Nanofiber-Based Composite Nanopapers

Advanced science, 2023-09, Vol.10 (27), p.e2302371-e2302371 [Peer Reviewed Journal]

2023 The Authors. Advanced Science published by Wiley-VCH GmbH. ;2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;2023 The Authors. Advanced Science published by Wiley‐VCH GmbH ;ISSN: 2198-3844 ;EISSN: 2198-3844 ;DOI: 10.1002/advs.202302371 ;PMID: 37485624

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  • Title:
    Novel Fabrication of Basalt Nanosheets with Ultrahigh Aspect Ratios Toward Enhanced Mechanical and Dielectric Properties of Aramid Nanofiber-Based Composite Nanopapers
  • Author: Ji, Dexian ; Song, Shunxi ; Lyu, Yuming ; Ren, Wei ; Li, Linghao ; Yang, Bin ; Zhang, Meiyun
  • Subjects: aramid nanofibers ; basalt nanosheets ; Cavitation ; composite nanopapers ; Dielectric properties ; electrical insulation ; Ethanol ; Mechanical properties ; mechanical strength ; Microscopy ; Solvents ; Tensile strength
  • Is Part Of: Advanced science, 2023-09, Vol.10 (27), p.e2302371-e2302371
  • Description: The rapid development of modern electrical equipment has led to urgent demands for electrical insulating materials with mechanical reliability and excellent dielectric properties. Herein, basalt nanosheets (BSNs) with high aspect ratios (≈780.1) are first exfoliated from basalt scales (BS) through a reliable chemical/mechanical approach. Meanwhile, inspired by the layered architecture of natural nacre, nacre-mimetic composite nanopapers are reported containing a 3D aramid nanofibers (ANF) framework as a matrix and BSNs as ideal building blocks through vacuum-assisted filtration. The as-prepared ANF-BSNs composite nanopapers exhibit considerably enhanced mechanical properties with ultralow BSNs content. These superiorities are wonderfully integrated with exceptional dielectric breakdown strength, prominent volume resistivity, and extremely low dielectric constant and loss, which are far superior to conventional nacre-mimetic composite nanopapers. Notably, the tensile strength and breakdown strength of ANF-BSNs composite nanopapers with a mere 1.0 wt% BSNs reach 269.40 MPa and 77.91 kV mm , respectively, representing an 87% and 133% increase compared to those of the control ANF nanopaper. Their properties are superior to those of previously reported nacre-mimetic composite nanopapers and commercial insulating micropapers, indicating that ANF-BSNs composite nanopapers are a highly promising electrical insulating material for miniaturized high-power electrical equipment.
  • Publisher: Germany: John Wiley & Sons, Inc
  • Language: English
  • Identifier: ISSN: 2198-3844
    EISSN: 2198-3844
    DOI: 10.1002/advs.202302371
    PMID: 37485624
  • Source: Wiley Blackwell Open Access Collection
    PubMed Central (Open access)
    Directory of Open Access Journals
    ProQuest Central
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