Hydrophobic Eutectogels as Electrodes for Underwater Electromyography Recording

Area of Science:

• Bioelectronics
• Materials Science
• Biomedical Engineering

Background:

• Traditional flexible electrodes lack stability and consistent conductivity in aquatic environments, hindering underwater bioelectronic recordings.
• Developing robust and reliable underwater electrodes is crucial for advancing bioelectronic applications in wet conditions.

Purpose of the Study:

• To introduce novel water-resistant electrodes utilizing elastic gels derived from hydrophobic natural eutectic solvents.
• To demonstrate the potential of these eutectogels for stable and high-fidelity underwater bioelectronic signal acquisition.

Main Methods:

• Fabrication of elastic eutectogels through one-step photopolymerization of acrylic monomers in eutectic mixtures of fatty acids and menthol.
• Characterization of eutectogel mechanical properties and water uptake.
• 3D printing of eutectogel formulations as inks for complex electrode fabrication.
• Testing electrode performance for real-time electromyography (EMG) signal recording in air and underwater.

Main Results:

• Eutectogels exhibit tailorable mechanical properties and low water uptake due to their hydrophobic nature.
• The low viscosity of eutectic mixtures enables 3D printing of intricate electrode designs.
• The flexible eutectogel electrodes demonstrate stable conductivity and low interference during underwater EMG recordings.

Conclusions:

• Hydrophobic eutectogels provide a promising solution for stable and conductive underwater electrodes in bioelectronics.
• The developed materials and fabrication methods facilitate the creation of advanced underwater bioelectronic devices.
• These water-resistant electrodes pave the way for improved aquatic bio-signal monitoring and applications.