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Flexible Tactile Sensor Array Based on Aligned MWNTs-PU Composited Sub-Microfibers.

Weiting Liu1, Xiaoying Cheng2,3, Xiaodong Ruan4

  • 1State Key Laboratory of Fluid Power & Mechatronic Systems, Zhejiang University, No. 38 Zheda Road, Hangzhou 310027, China. liuwt@zju.edu.cn.

Micromachines
|November 15, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel tactile sensor using aligned multi-walled carbon nanotubes (MWNTs) and polyurethane (PU) composite sub-microfibers. This artificial skin technology offers improved performance for tactile sensation systems.

Keywords:
carbon nanotubeselectrospinningflexible tactile sensorsnanocompositesub-microfiber array

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Sensor Technology

Background:

  • Micro/nanoscale fibers offer excellent mechanical properties and enhanced alignment of nanomaterials.
  • High impedance in small-section fibers limits their application in sensing.
  • Developing artificial skin requires sensitive and robust tactile sensor arrays.

Purpose of the Study:

  • To fabricate aligned multi-walled carbon nanotubes (MWNTs)-polyurethane (PU) composite sub-microfiber (SMF) arrays.
  • To investigate the impedance changes of these SMFs under applied force for tactile sensing.
  • To analyze the piezoresistive mechanism of MWNTs within the SMFs.

Main Methods:

  • Utilized electrospinning to create unidirectional composite SMFs.
  • Fabricated SMFs orthogonally to parallel electrodes.
  • Measured the impedance of SMFs to assess deformation due to applied force.
  • Analyzed the piezoresistive behavior of MWNTs in the composite structure.

Main Results:

  • Successfully fabricated aligned MWNTs-PU composite SMF arrays.
  • Demonstrated that SMF impedance changes with applied force, indicating sensitivity.
  • Piezoresistive mechanism of MWNTs within the SMF was analyzed.
  • Static and dynamic tests validated the performance of the fabricated tactile sensor.

Conclusions:

  • The novel method enables the fabrication of effective tactile sensor arrays using MWNTs-PU composite SMFs.
  • The developed sensor shows potential for artificial skin applications in tactile sensation systems.
  • The study provides insights into the piezoresistive properties of MWNTs in composite sub-microfibers for sensor applications.