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Supramolecular hydrogels have promising applications in a wide variety of fields including 3D bioprinting, sensors and actuators, biomedicine, and controlled drug delivery. This communication reports the facile reversible thermotriggered formation of novel pH‐responsive supramolecular hydrogels based on poly(vinyl alcohol) (PVA) bonded via dynamic H‐bridge with small phenolic biomolecules. PVA and...