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Double-layer biodegradable hydrogel based on tragacanth gum as an electrically conductive nanoplatform for TENS
Zohre Jafari Vafa1, Ehsan Nazarzadeh Zare2, Mohammad Reza Fadavi Eslam1
1School of Physics, Damghan University, Damghan 36716-45667, Iran.
Carbohydrate Polymers
|May 18, 2025
Summary
This study developed a novel double-layer bio-hydrogel for transcutaneous electrical nerve stimulation (TENS) devices. The enhanced material demonstrates improved conductivity, mechanical strength, and biocompatibility, paving the way for advanced TENS applications.
Area of Science:
- Biomaterials Science
- Materials Engineering
- Nanotechnology
Background:
- Developing advanced bio-hydrogels is crucial for effective transcutaneous electrical nerve stimulation (TENS) devices.
- Existing hydrogels often lack the necessary conductivity and mechanical stability for reliable TENS applications.
Purpose of the Study:
- To design and fabricate a novel double-layer bio-hydrogel composite for TENS applications.
- To investigate the structural, electrical, and mechanical properties of the developed bio-hydrogel.
- To assess the biocompatibility and biodegradability of the material.
Main Methods:
- Fabrication of a double-layer bio-hydrogel using tragacanth gum (TG), carboxylated graphene (GrF), and polyaniline (PANI).
- Characterization using X-ray diffraction (XRD), conductivity tests, contact angle measurements, Field Emission Scanning Electron Microscopy (FESEM), and mechanical testing.
- Biocompatibility assessment via MTT assays and biodegradability studies.
Main Results:
- Polyaniline coating induced structural changes, reducing crystallinity and indicating strong matrix interactions.
- Significant improvements in alternating current conductivity were observed, with PANI coating increasing conductivity by over 20,000 times at 80 Hz.
- Enhanced mechanical strength (4.59-fold increase in tensile strength), low hydrophilic surface, and uniform GrF distribution were confirmed.
- High cell viability (>90.37%) confirmed biocompatibility, and complete biodegradation occurred within two months.
Conclusions:
- The developed double-layer bio-hydrogel exhibits excellent electrical conductivity, mechanical robustness, and biocompatibility.
- The composite material shows significant promise for enhancing the performance and functionality of TENS devices.
- The study highlights the potential of combining natural gums, graphene, and conductive polymers for advanced biomedical applications.
