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Engineering Dynamic Hydrophobic Domains in Bioreinforced Ionic Hydrogels for Robust and Transparent Soft Electronics
Ijaz Ali1, Mansoor Khan2, Eliaquim B P Sena1
1Laboratório de Tecnologia e Desenvolvimento de Compósitos e Materiais Poliméricos (LaCoPol), Federal University of Pelotas, Pelotas, RS 96010-900, Brazil.
Langmuir : the ACS Journal of Surfaces and Colloids
|June 9, 2026
Summary
This study introduces a novel, filler-free conductive hydrogel using micelle engineering and bioreinforcement. The material offers exceptional stretchability, transparency, and conductivity for advanced soft electronics.
Area of Science:
- Materials Science
- Polymer Chemistry
- Biomaterials Engineering
Background:
- High-performance conductive hydrogels often require fillers or complex synthesis.
- Scalability and structural integrity are key challenges in soft electronic material development.
Purpose of the Study:
- To engineer a scalable, filler-free conductive hydrogel with enhanced mechanical and electrical properties.
- To demonstrate a micelle-mediated hydrophobic domain strategy in a bioreinforced polymer network.
Main Methods:
- Incorporation of stearyl methacrylate into a poly(acrylamide) matrix using SDS-assisted micellization.
- Utilizing gelatin as a renewable macromolecular reinforcement for a cooperative network.
- Establishing a dynamic network through reversible hydrophobic associations and hydrogen bonding.
Main Results:
- Achieved ultrahigh stretchability (2420%), high fracture stress (0.31 MPa), and optical transparency (~85.9%).
- Demonstrated stable ionic conductivity and reliable electromechanical response over a wide strain range (0.5-650%).
- Exhibited fast response/recovery times and excellent cyclic durability without permanent damage.
Conclusions:
- Micelle-mediated hydrophobic domain engineering provides a scalable route to robust, transparent, conductive soft materials.
- This filler-free approach eliminates the need for complex processing, enabling applications in next-generation soft electronics and wearables.
