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Fabrication of Carbon-Based Ionic Electromechanically Active Soft Actuators
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Polypyrrole nanoparticles-based soft actuator for artificial muscle applications.

Ajahar Khan1, Khalid A Alamry1, Ravi Kant Jain2

  • 1Faculty of Science, Department of Chemistry, King Abdulaziz University Jeddah 21589 Saudi Arabia.

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|May 11, 2022
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Researchers developed novel polypyrrole/polyvinyl alcohol (PPy/PVA) soft actuators using eco-friendly materials. These flexible actuators demonstrate significant potential for micro robotic applications due to their enhanced electromechanical performance.

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Area of Science:

  • Materials Science
  • Robotics Engineering
  • Polymer Chemistry

Background:

  • Developing soft actuators from sustainable materials for robotics is challenging.
  • Conducting polymers like polypyrrole (PPy) offer promising conductivity for actuator applications.
  • Existing actuators often rely on expensive perfluorinated polymers.

Purpose of the Study:

  • To fabricate and characterize novel, stable, flexible, and reliable ionic polymer actuator films for robotic applications.
  • To investigate the effect of polypyrrole nanoparticle size on the electromechanical actuation performance.
  • To develop a micro gripping device utilizing the fabricated actuator films.

Main Methods:

  • Synthesis of polypyrrole/polyvinyl alcohol (PPy/PVA) based ion exchange polymer films with PEDOT:PSS/SWNT/IL electrodes.
  • Fabrication of four types of ionic polymer actuator films with varying PPy nanoparticle sizes.
  • Characterization using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), cyclic voltammetry, and linear sweep voltammetry.
  • Evaluation of water uptake, ion exchange capacity, and ionic conductivity.

Main Results:

  • The PPy/PVA composite films exhibited enhanced water uptake, ion exchange capacity, and ionic conductivity compared to perfluorinated polymer actuators.
  • The fabricated actuator films demonstrated size-dependent electromechanical actuation performance.
  • A two-finger micro gripping device was successfully developed using the O-PPy/PVA/EL-based actuator films.
  • The actuators showed improved electrical properties and tip deflection performance.

Conclusions:

  • The PPy/PVA based ionic polymer actuator films are mechanically stable, flexible, and reliable.
  • These actuators possess substantial potential for micro robotic applications.
  • The synergistic combination of PPy/PVA and PEDOT:PSS/SWNT/IL electrodes enhances actuator performance.