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By effectively regulating noncovalent interactions and thus the structure of polymer networks through the solvent exchange strategy, in article number 2004579, Yan Qiao, Dong Qiu, and co‐workers develop a class of stiff and antiswelling hydrogels (named as exogels). The spatial and temporal progression of the exogels via solvent exchange also make them applicable for robust underwater adhesion.
Physical hydrogels from existing polymers consisting of noncovalent interacting networks are highly desired due to their well‐controlled compositions and environmental friendliness; and therefore, applied as adhesives, artificial tissues, and soft machines. Nevertheless, these gels have suffered from weak mechanical strength and low water resistance. Current methodologies used to fabricate these hydrogels...
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