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Hydrophobic Deep Eutectic Solvent-Enhanced Filaments: A Green Breakthrough for Additive-Manufactured Electrodes.

Karen Kenlderi de Lima Augusto1,2, Elena Bernalte1, Robert D Crapnell1

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Summary

Researchers developed a sustainable conductive filament using recycled PLA and a novel hydrophobic deep eutectic solvent (HDES). This green chemistry innovation enhances material performance for advanced electrochemical sensors.

Keywords:
3D printingacetaminophenadditive manufacturingcellulosehydrophobic deep eutectic solventsustainability

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Area of Science:

  • Green Chemistry
  • Materials Science
  • Electrochemistry

Background:

  • Sustainable materials are crucial for functional devices.
  • Recycled polylactic acid (rPLA) and bio-based components offer eco-friendly alternatives.
  • Conductive filaments require enhanced mechanical and electrical properties for advanced applications.

Purpose of the Study:

  • To integrate a hydrophobic deep eutectic solvent (HDES) into a recycled polylactic acid (rPLA) conductive filament.
  • To enhance the mechanical, electrical, and electrochemical performance of the sustainable filament.
  • To develop and test additive-manufactured electrochemical sensors using the novel composite material.

Main Methods:

  • Fabrication of a conductive filament using rPLA, carbon black, cellulose, castor oil, and HDES.
  • Characterization of the filament's mechanical, electrical, and electrochemical properties.
  • Application of the fabricated electrodes for the voltammetric determination of acetaminophen.

Main Results:

  • The HDES-modified filament exhibited improved electrical conductivity (reduced bulk resistance from 1.16 ± 0.1 to 0.86 ± 0.02 kΩ).
  • Enhanced mechanical properties and printability were observed due to cellulose integration.
  • Superior electrochemical performance, including enhanced charge-transfer rates and electroactive surface area, was achieved.
  • Successful application in acetaminophen determination with a linear range of 5.0–300 µM and a limit of detection of 0.12 µM.

Conclusions:

  • HDES integration significantly enhances the performance of sustainable conductive filaments.
  • The developed material shows great promise for high-performance, additive-manufactured electrochemical sensors.
  • This work advances green chemistry by combining additive manufacturing with eco-friendly materials for functional devices.