Degradable Supramolecular Eutectogel-Based Ionic Skin with Antibacterial, Adhesive, and Self-Healable Capabilities

Area of Science:

• Materials Science
• Polymer Chemistry
• Biomaterials Engineering

Background:

• Flexible electronic devices generate significant electronic waste due to non-degradable components.
• Developing conductive gels that are simultaneously biocompatible, degradable, tough, and durable presents a significant challenge.

Purpose of the Study:

• To create a facile strategy for designing and synthesizing degradable, tough eutectogels.
• To address the limitations of current conductive gels in terms of mechanical strength, durability, and environmental impact.
• To develop advanced materials for next-generation flexible wearable electronic devices.

Main Methods:

• Integration of an electrostatically driven supramolecular network (branched polyacrylic acid and monoethanolamine) into a deep eutectic solvent (chitosan quaternary ammonium salt).
• Characterization of the resulting PAA/MEA/CQS eutectogels for various properties.
• Fabrication and testing of a multifunctional ionic skin based on the developed eutectogel.

Main Results:

• The PAA/MEA/CQS eutectogels exhibit high transparency, adjustable mechanical properties, resilience, adhesion, self-healing, conductivity, anti-freezing, and antibacterial characteristics.
• Dynamic supramolecular interactions enhance mechanical strength while enabling rapid degradation, resolving the strength-degradability dilemma.
• A biocompatible and degradable ionic skin demonstrated high sensitivity, wide sensing range, and rapid response to strain, pressure, and temperature.

Conclusions:

• The study presents a promising strategy for fabricating degradable tough eutectogels.
• The developed eutectogels offer a sustainable solution for flexible electronics, reducing electronic waste.
• The PAA/MEA/CQS eutectogels hold significant potential for high-performance ionic skins in next-generation wearable devices.