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Mechanically Robust, Environmentally Resistant, and Piezoionic Polyzwitterionic Composite Eutectogels Based on
Hongping Li1, Bai Huang1, Zongming Lv1
1School of Chemistry and Chemical Engineering, Guangxi University, No. 100, Daxuedong Road, Xixiangtang District, Nanning 530004, China.
ACS Applied Materials & Interfaces
|July 30, 2025
Summary
This study developed strong, stable polyzwitterionic composite eutectogels using deep eutectic solvent and sodium alginate. These advanced gels exhibit high ionic conductivity and potential for energy storage and wearable electronics.
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomaterials
Background:
- Polyzwitterionic gels offer biocompatibility and water absorption but suffer from poor mechanical properties and stability.
- Existing limitations hinder their practical applications in demanding environments.
Purpose of the Study:
- To enhance the mechanical strength, environmental stability, and ionic conductivity of polyzwitterionic gels.
- To explore the use of deep eutectic solvent (DES) and sodium alginate (SA) for creating advanced composite eutectogels.
Main Methods:
- Incorporation of DES into a sulfobetaine zwitterionic monomer (DMAPS) system.
- Construction of a polyzwitterionic network using SA polysaccharide complexation with calcium ions.
- Characterization of the resulting composite eutectogels' mechanical, thermal, and electrical properties.
Main Results:
- The composite eutectogels demonstrated significantly improved tensile strength, Young's modulus, and toughness due to SA's hydrogen bonding and electrostatic interactions.
- Excellent environmental stability across high and low temperatures was achieved with DES.
- High ionic conductivity (0.13-0.48 S·m⁻¹) and stable piezoionic output were observed.
Conclusions:
- The developed composite eutectogels overcome the limitations of traditional polyzwitterionic gels, offering superior performance.
- The strategy of using biomass ionic network skeletons provides a pathway for high-performance ion-conducting materials.
- Potential applications include energy storage, wearable sensors, and powering electronic devices.
