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Solvent-Free and Skin-Like Supramolecular Ion-Conductive Elastomers with Versatile Processability for Multifunctional
Wenwen Niu1, Qiong Tian2, Zhiyuan Liu2
1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, China.
Advanced Materials (Deerfield Beach, Fla.)
|June 22, 2023
Summary
Researchers developed a novel solvent-free supramolecular ion-conductive elastomer (SF-supra-ICE) for advanced stretchable electronics. This biocompatible material offers high conductivity and can be printed as ionic tattoos for on-skin bioelectronics and human-machine interfaces.
Area of Science:
- Materials Science
- Biomedical Engineering
- Polymer Chemistry
Background:
- Hydrogels and ionogels face limitations like dehydration and biocompatibility issues in soft electronics.
- Development of stable, biocompatible ionic conductors is crucial for advanced stretchable and wearable devices.
Purpose of the Study:
- To create a novel solvent-free supramolecular ion-conductive elastomer (SF-supra-ICE) as an alternative to traditional soft ionic conductors.
- To demonstrate the potential of SF-supra-ICE for fabricating multifunctional on-skin bioelectronics and human-machine interfaces.
Main Methods:
- Encapsulation of an ionizable compound within a biocompatible polymer using high-density hydrogen bonds.
- Fabrication of SF-supra-ICE through a simple water evaporation process, yielding a solvent-free elastomer.
- Printing of aqueous precursor as ionic tattoos (I-tattoos) for on-skin applications.
Main Results:
- SF-supra-ICE exhibits high ionic conductivity (>3.3 × 10⁻² S m⁻¹), skin-like softness, strain-stiffening, elasticity, breathability, and self-adhesiveness.
- Printed I-tattoos demonstrate ultraconformal skin contact for high-fidelity electrophysiological signal recording with immunity to motion artifacts.
- Demonstrated multichannel digital diagnosis of back muscles and spine using stretchable I-tattoo electrode arrays.
Conclusions:
- SF-supra-ICE offers a promising solution for stable, biocompatible, and solvent-free soft ionic conductors.
- The developed I-tattoos enable advanced on-skin bioelectronics, seamless human-machine interaction, and non-invasive health monitoring.
- This technology paves the way for next-generation wearable devices and personalized diagnostics.
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