Development of Dual-Functional Hydrogel-Based Conductive Electrodes for Accelerated Wound Healing and Motion Sensing

Area of Science:

• Materials Science
• Biomedical Engineering
• Nanotechnology

Background:

• Flexible conductive hydrogels offer potential for wound healing, bioelectrical signaling, and motion sensing.
• Applications include personalized medicine, wearable electronics, and smart prosthetics.

Purpose of the Study:

• To develop dual-function electrically conductive hydrogels for accelerated wound healing and motion sensing.
• To investigate the impact of nanocellulose (CNC) and Laponite (LAP) content on hydrogel properties.
• To optimize hydrogel composition for enhanced performance.

Main Methods:

• Hydrogel synthesis using polyvinyl alcohol (PVA), CNC, LAP, and polyaniline (PANI) via freeze-thaw cross-linking.
• Systematic investigation of CNC and LAP content effects on conductivity, mechanical strength, swelling, and degradation.
• Biocompatibility and cell migration assays using human dermal fibroblasts (HDF).

Main Results:

• Optimized PVA-CNC-LAP/PANI hydrogel exhibited high conductivity (33.65 S/m) and robust mechanical properties (490 kPa tensile strength).
• Demonstrated reliable sensor sensitivity (gauge factor = 1.74) and durability (>500 cycles).
• Hydrogel supported HDF proliferation and migration, showing potential in flexible sensors, actuators, and ECG electrodes.

Conclusions:

• The developed biocompatible hydrogel electrodes possess satisfactory electrical conductivity and excellent mechanical integrity.
• The hydrogel's electroresponsive behavior supports cell growth and motion detection.
• These multifunctional hydrogels show significant promise for advanced biomedical and wearable applications.