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Solvation-substitution coupling enables rigid, self-healable zwitterionic eutectogels for transparent, load-bearing ionotronic interfaces
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DOI：10.1016/j.nanoen.2026.111957.png)
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Abstract
En 中文
Integrating structural load bearing, dissipation under fast and localized deformation, and reliable self-healing within a transparent ionic conductor remains challenging because chain mobility that enables healing often erodes stiffness, whereas rigid reinforcement suppresses reversible association exchange. Here we report zwitterionic eutectogels that address this trade-off through solvation-substitution coupling, realized by one-pot photopolymerization of a zwitterionic monomer with an alpha-methyl-substituted comonomer in a zwitterionic deep eutectic solvent. Eutectic solvation and alpha-methyl substitution jointly favor an exchangeable COOH-mediated association network, enabling higher stiffness and strength while retaining network reconfigurability. Across polymer fractions, the eutectogels reach tensile strength up to 26.4 MPa, Young's modulus up to 421.9 MPa, and toughness up to 20.1 MJ m(-3). A representative 45 wt% formulation is optically transparent (94%), delivers 6.7 MPa lap-shear strength on ceramic and exhibits an energy-dissipation ratio exceeding 75%. When healed near T-g, the eutectogel delivers repeatable cut-and-heal recovery, sustaining similar to 95% toughness recovery over five cycles. These eutectogels provide transparent, load-bearing ionotronic interlayers that integrate high dissipation with repeatable cut-and-heal recovery, offering a molecular handle for rigid yet reconfigurable ionic conductors.
Keywords:
Eutectogels
Deep eutectic solvents
Self-healing
Adhesive ionotronics
Triboelectric effect
Self-powered sensing
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17.1
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