Strong and Tough Water-Tolerant Conductive Eutectogels with Phase-Separated Hydrophilic/Hydrophobic Dual Ionic Channels
作者：Hanbing Ma, Min Wang, Jiawen Hou, Xiaoliang Wang, Pingchuan Sun,* and Fenfen Wang*
關鍵字：eutectogels, dual ionic channels, in-situ phase separation, ionic conductivity, water resistance
論文來源：期刊
具體來源：Advanced Materials 2025, https://doi.org/10.1002/adma.202500770
發(fā)表時間：2025年
Eutectogels are emerging as the next-generation stretchable electronics due
to their superior ionic conductivity, non-volatility, and cost-effectiveness.
Nevertheless, most eutectogels suffer from weak mechanical strength and
toughness and pronounced hygroscopicity. Herein, a strategy is proposed to
fabricate phase-separated eutectogels with dual ionic channels (PSDIC-gel),
which exhibit exceptional integrative properties, especially water resistance.
By blending hydrophilic/hydrophobic polymerizable deep eutectic solvents,
dual ionic channels spontaneously form via polymerization-induced phase
separation. The hydrophilic poly(acrylic acid) (PAA) phase containing
Li+-channels, rich in hydrogen bonding and ion-dipole interactions, provides
mechanical strength and conductivity. The hydrophobic poly(hexafluorobutyl
acrylate) (PHFBA) phase incorporating cholinium cation (Ch+) channels
enhances toughness, conductivity, and water resistance. Adjusting the phase
ratio yields a microphase-separated transparent eutectogel with high tensile
strength (6.03 MPa), toughness (16.18 MJ m?3), excellent ionic conductivity
(1.6 × 10?3 S m?1), strong substrate adhesion, and rapid room-temperature
self-healing. Solid-state NMR reveals the conductive mechanism and the
phase-separated structure featuring dual ionic channels in PSDIC-gels,
advancing the understanding of complex ionic interactions at the atomic level.
The PSDIC-gel enables a flexible triboelectric nanogenerator for accurate
real-time self-powered human motion sensing. This work advances eutectogel
design through structure-property engineering, offering a universal strategy to
reconcile mechanical robustness, environmental suitability, and ionic
conductivity for wearable electronics.