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Related Concept Videos

Diamagnetic Shielding of Nuclei: Local Diamagnetic Current01:14

Diamagnetic Shielding of Nuclei: Local Diamagnetic Current

845
An applied magnetic field causes the electrons present in the molecule to circulate, setting up a local diamagnetic current within the molecule. The local diamagnetic current arising from circulating sigma-bonding electrons induces a magnetic field, Blocal that opposes the applied magnetic field, B0. The effective magnetic field experienced by these nuclei is given by the difference between the applied and local magnetic fields in a phenomenon called local diamagnetic shielding. Essentially,...
845
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  11. Ultrastrong Nanopapers With Aramid Nanofibers And Silver Nanowires Reinforced By Cellulose Nanofibril-assisted Dispersed Graphene Nanoplates For Superior Electromagnetic Interference Shielding.
  1. Home
  3. Research Domains
  5. Engineering
  7. Materials Engineering
  9. Wearable Materials
  11. Ultrastrong Nanopapers With Aramid Nanofibers And Silver Nanowires Reinforced By Cellulose Nanofibril-assisted Dispersed Graphene Nanoplates For Superior Electromagnetic Interference Shielding.

Related Experiment Video

Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation
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Towards Biomimicking Wood: Fabricated Free-standing Films of Nanocellulose, Lignin, and a Synthetic Polycation

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Ultrastrong Nanopapers with Aramid Nanofibers and Silver Nanowires Reinforced by Cellulose Nanofibril-Assisted Dispersed Graphene Nanoplates for Superior Electromagnetic Interference Shielding.

Fugang Hu1,2, Minghong Kui3, Jinsong Zeng1,2

  • 1Plant Fiber Material Science Research Center, State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, P. R. China.

ACS Nano
|September 4, 2024

View abstract on PubMed

Summary
This summary is machine-generated.
Keywords:
aramid nanofiberscellulose nanofibrilselectromagnetic interference shieldinggraphene nanoplates

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Researchers developed ultrathin, flexible nanopapers using cellulose nanofibrils (CNFs) to embed graphene nanoplates (GNPs) and silver nanowires (AgNWs). These materials offer exceptional electromagnetic interference (EMI) shielding and electrical heating for advanced electronics.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Electromagnetics

Background:

  • Modern integrated electronics require high-performance electromagnetic interference (EMI) shielding materials that are strong, lightweight, ultrathin, and flexible.
  • Existing materials often face trade-offs between shielding effectiveness, mechanical properties, and form factor.

Purpose of the Study:

  • To develop novel nanopaper-based materials with superior EMI shielding and mechanical properties.
  • To explore the potential of cellulose nanofibrils (CNFs) in creating advanced composite materials.

Main Methods:

  • Homogeneous dispersion of graphene nanoplates (GNPs) within aramid nanofiber (ANF) and silver nanowire (AgNW) networks using CNFs.
  • Fabrication of nacre-mimetic microstructured and layered nanopapers.
robust mechanical properties
silver nanowires
  • Characterization of mechanical strength, toughness, electrical conductivity, EMI shielding effectiveness, and durability.

    • Main Results:

    • The developed nanopapers exhibit high tensile strength (601.11 MPa) and toughness (103.56 MJ m-3) at a thickness of 24.58 μm.
    • Specific tensile strength (447.59 MPa·g-1·cm3) surpasses that of titanium alloys.
    • Achieved excellent EMI shielding effectiveness (SE) of 63.87 dB and SE/t of 25978.80 dB cm-1 with high electrical conductivity (12010.00 S cm-1).
    • Demonstrated reliable durability, retaining significant strength and EMI SE after 120,000 folding cycles.
    • Exhibited effective electrical heating performance for deicing and heating applications.

    Conclusions:

    • The CNF-based strategy successfully produced high-performance nanopapers with excellent mechanical and EMI shielding properties.
    • These materials show great potential for applications in electromagnetic compatibility, defense, smart electronics, and healthcare.
    • The nacre-mimetic structure contributes to the superior performance and durability of the developed nanopapers.