Phase‐Segregated Ductile Eutectogels with Ultrahigh Modulus and Toughness for Antidamaging Fabric Perception

Abstract

Ionogels are extremely soft ionic materials that can undergo large deformation while maintaining their structural and functional integrity. Ductile ionogels can absorb energy and resist fracture under external load, making them an ideal candidate for wearable electronics, soft robotics, and protective gear. However, developing high‐modulus ionogels with extreme toughness remains challenging. Here, a facile one‐step photopolymerization approach to construct an acrylic acid (AA)‐2‐hydroxyethylacrylate (HEA)‐choline chloride (ChCl) eutectogel (AHCE) with ultrahigh modulus and toughness is reported. With rich hydrogen bonding crosslinks and phase segregation, this gel has a 99.1 MPa Young's modulus and a 70.6 MJ m−3 toughness along with 511.4% elongation, which can lift 12 000 times its weight. These features provide extreme damage resistance and electrical healing ability, offering it a protective and strain‐sensitive coating to innovate anticutting fabric with motion detection for human healthcare. The work provides an effective strategy to construct robust ionogel materials and smart wearable electronics for intelligent life.

Tough and stretchable copolymer eutectogels constructed via in situ phase separation for flexible strain sensors

“…The eutectogels were prepared using the (j) Rough comparison of this work with previously reported tough eutectogels in terms of self-healing capability, ionic conductivity, tensile strength, tensile strain, and gauge factor of strain sensor. 19,37,38,[42][43][44][45][46][47][48][49] [Color figure can be viewed at wileyonlinelibrary.com] one-pot method of copolymerization of monomers and crosslinkers. A prescribed amount of MAA, AAm, PEGDA, and photoinitiator were dissolved in TEAC-EG DES by stirring at 80 C for 30 min.…”