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Related Experiment Video

Updated: Jun 18, 2025

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Cellulose Nanofiber-Based Nanocomposite Films with Efficient Electromagnetic Interference Shielding and

Wenqin Shao1, Xutao Zhang1, Xiao Liang1

  • 1College of Materials Science and Engineering, Zhejiang Key Laboratory of Plastic Modification and Processing Technology, Zhejiang University of Technology, Hangzhou 310014, PR China.

ACS Applied Materials & Interfaces
|August 1, 2024
PubMed
Summary

Flame retardant cellulose nanofiber (CNF) composite films were developed using a biobased additive derived from l-arginine and ammonium polyphosphate. These enhanced CNF films offer improved fire resistance and effective electromagnetic interference shielding.

Keywords:
biomass derivativescellulose nanofiberflame retardancygraphene nanoplateletsmechanical properties

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Cellulose nanofiber (CNF) is a versatile matrix for composites due to its mechanical strength and environmental benefits.
  • A key limitation of CNF is its poor flame retardancy, hindering wider applications.
  • Developing effective flame-retardant and functional composite materials is crucial.

Purpose of the Study:

  • To synthesize a novel, environmentally friendly biobased flame retardant for CNF.
  • To enhance the flame retardancy and electromagnetic interference (EMI) shielding properties of CNF-based composite films.
  • To investigate the structural and performance characteristics of the modified composite films.

Main Methods:

  • Surface modification of ammonium polyphosphate (APP) with l-arginine (AR) to create AAZ flame retardant.
  • Deposition of AAZ onto CNF via electrostatic adsorption and Zn2+ complexation.
  • Exfoliation and dispersion of graphene nanoplatelets (GNPs) in the CNF matrix using Triton X-100.
  • Fabrication of CNF/GNPs composite films using vacuum-assisted filtration.

Main Results:

  • The synthesized AAZ acted as an effective biobased flame retardant for CNF.
  • CNF/GNPs composite films exhibited enhanced flame retardancy, with significant reductions in peak heat release rate (PHRR) and total heat release (THR).
  • The composite films demonstrated high electrical conductivity and excellent EMI shielding effectiveness (37 dB) with 20 wt% GNPs.

Conclusions:

  • The developed biobased flame retardant successfully improved the fire safety of CNF composites.
  • The incorporation of GNPs further enhanced the performance, yielding multifunctional materials.
  • These ultrathin CNF/GNPs composite films show great potential for flame-retardant and EMI shielding applications.