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Novel, tough, strong, and self‐healable polyacrylamide (PAAm) gels are fabricated by inducing an appropriate phase‐separation structure using a poor solvent. The phase separation induces a gel–glass‐like transition of the PAAm gels, providing the gels an anomalously high modulus (211 MPa), fracture stress (7.13 MPa), and fracture energy (4.16 × 104 J m−2), while keeping a high solvent content (≈60...
A series of tough polyion complex hydrogels is synthesized by sequential homopolymerization of cationic and anionic monomers. Owing to the reversible interpolymer ionic bonding, the materials are self‐healable under ambient conditions with the aid of saline solution. Furthermore, self‐glued bulk hydrogels can be built from their microgels, which is promising for 3D/4D printing and the additive manufacturing...
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