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Related Experiment Video

Updated: Dec 2, 2025

Author Spotlight: Revolutionizing Microfluidics Through Microchannel Fabrication on Nanopaper
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Tunable Electrical Properties of Embossed, Cellulose-Based Paper for Skin-like Sensing.

Tongfen Liang1, Xiyue Zou1, Ramendra Kishor Pal1

  • 1Department of Mechanical and Aerospace Engineering, Rutgers University, Piscataway 08854, New Jersey, United States.

ACS Applied Materials & Interfaces
|November 4, 2020
PubMed
Summary

Researchers created a conductive paper from cellulose and carbon black (CB). Embossing this paper tunes its conductivity and porosity, enabling applications in touch sensing and structural health monitoring.

Keywords:
embossingpiezoresistive paperskin-like sensingthree-phase compositetunable conductivity

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Polymer Science

Background:

  • Developing advanced materials with tunable electrical properties is crucial for next-generation electronics.
  • Carbon black (CB) is a common conductive filler, but achieving optimal dispersion and conductivity in polymer matrices remains a challenge.
  • Cellulosic materials offer a sustainable and versatile platform for composite fabrication.

Purpose of the Study:

  • To describe a novel process for fabricating highly porous, conductive paper from cellulosic fibers and carbon black (CB).
  • To investigate the effect of embossing on the porosity and conductivity of the composite paper.
  • To explore the piezoresistive properties and potential applications of the developed material.

Main Methods:

  • Fabrication of composite paper using cellulosic fibers and varying concentrations of carbon black (CB).
  • Embossing technique applied to alter the paper's microstructure and physical properties.
  • Electrical conductivity and piezoresistive response measurements under varying pressure and cycling conditions.

Main Results:

  • A significant increase in conductivity (∼300-fold) was observed at the percolation threshold (3.8 wt % CB) after plastic compression.
  • The composite paper exhibited stable piezoresistive behavior over a wide pressure range (1 kPa to 5.5 MPa) for 800 cycles.
  • Piezoresistive sensitivities were dependent on CB concentration and applied pressure, with specific values reported for different pressure ranges.

Conclusions:

  • Tunable conductivity and porosity of cellulosic/CB composite paper can be achieved through controlled processing.
  • The material demonstrates promising piezoresistive characteristics for touch sensing and damage detection.
  • This research opens avenues for scalable applications in prosthetics, robotics, haptic feedback, and structural health monitoring.