Squid tissues and chemistry combine for versatile hydrogels

, we have demonstrated a hybrid strategy that serves as a general method for preparing hydrogels with useful hierarchical anisotropy and also toughness," says polymer scientist Tasuku Nakajima of the Hokkaido University team.begins with commercially available frozen squid mantle—the main outer part of a squid. In live squid, the mantle expands to take water into the body, and then strongly contracts to shoot water outwards as a jet.

"The DN gel we synthesized is much stronger and more elastic than the natural squid mantle," explains Professor Jian Ping Gong, who led the team."The unique composite structure also makes the material impressively resistant to fracture, four times tougher than the original material."

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