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MXene/Carboxylated Cellulose Nanofiber Inks for Direct Ink Writing Electromagnetic Interference Shielding, Humidity

Li Xu1, Sai Zhao2, Peizhu Jiang1

  • 1State Key Laboratory of Organic-inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.

ACS Applied Materials & Interfaces
|May 14, 2025
PubMed
Summary

Carboxylated cellulose nanofibers create tunable MXene inks for printed electronics. These inks enable multifunctional devices with electromagnetic interference shielding, Joule heating, and humidity sensing for advanced wearable applications.

Keywords:
Joule heatingMXene inkdirect ink writingelectromagnetic interference shieldinghumidity sensing

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electronics Engineering

Background:

  • Two-dimensional transition metal carbide/nitride (MXene)-based conductive inks show potential for scalable printed electronics and wearable devices.
  • Achieving desirable rheological properties and multifunctionality in MXene inks remains a significant challenge for practical applications.

Purpose of the Study:

  • To develop MXene inks with tunable rheological properties using carboxylated cellulose nanofibers (C-CNFs).
  • To demonstrate the fabrication of multifunctional devices, including electromagnetic interference (EMI) shielding, Joule heaters, and humidity sensors, using these modified inks.

Main Methods:

  • Modification of MXene inks with carboxylated cellulose nanofibers (C-CNFs) to tune rheological properties.
  • Direct ink writing (DIW) technique for fabricating MXene gratings and devices.
  • Characterization of EMI shielding effectiveness, Joule heating performance, and humidity sensing capabilities.

Main Results:

  • MXene inks with tunable rheology were successfully prepared using C-CNFs.
  • High average EMI shielding effectiveness of 33.0 dB and specific EMI SE of 137481.5 dB cm2 g-1 were achieved.
  • The devices exhibited stable Joule heating performance under low voltage and a maximum humidity sensor response of 2768% with wireless transmission.

Conclusions:

  • The C-CNF modified MXene inks offer versatile rheological properties suitable for DIW fabrication.
  • The resulting MXene gratings are multifunctional, demonstrating potential for next-generation wearable devices with integrated electronic functionalities.