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Highly flexible, self-healing, adhesive, conductive and temperature-resistant eutectogels via a one-step co-crosslinking method for real-time wearable sensors
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DOI：10.1016/j.mtchem.2025.102683.png)
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Abstract
En 中文
Developing smart hydrogel that possesses a combination attribute such as low-cost, biocompatibility, superior stretchability, toughness, ionic conductivity, self-healing, interfacial adhesion, and high sensitivity over a broad temperature range through a straightforward method, remains a significant challenge. Here, a eutectogel is rapidly prepared with the help of photopolymerization by simultaneously introducing acrylic acid and acrylamide monomers in a choline chloride/glycerol deep eutectic solvent. We address this by introducing a one-step co-crosslinking strategy that forms a multi-crosslinking network, integrating covalent bonds with reversible hydrogen-bond networks between dual monomers and deep eutectic solvents. This approach bestows the transparent eutectogel with a balance of high-performance and multifunctional attributes, including strong adhesiveness, inherent self-healing abilities, improved electrical conductivity, and versatile mechanical performance. Notably, these eutectogels demonstrate impressive fracture strength (68.21 MPa), a high Young's modulus (1659.36 MPa), and remarkable toughness (58.48 MJ m-3), along with an extensive stretchability range from 10 % to 4000 %. Moreover, they retain their mechanical flexibility and electrical conductivity across a wide temperature range, extending from sub-zero temperatures down to -80 degrees C to elevated temperatures up to 60 degrees C. As a proof-to-concept, the approach provides an alternative insight for the potential versatile applications in flexible electronics and biomedical devices.
Keywords:
Deep eutectic solvent
Eutectogels
Self-healing
Self-adhesive
Strain sensor
Conductivity
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