Highly Stretchable Zwitterionic Hydrogels of High Ionic Conductivity
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Zwitterion hydrogels have received great attention due to their ability to provide distinct ion migration channels for positive and negative ions, greatly enhancing the facilitation of electrolyte ion transport. However, fabricating zwitterion hydrogels with desirable mechanical properties and dependable electrical performance has been a notable challenge. In this work, we prepared a zwitterionic copolymer-PVA hydrogel combination that provides both ionic conductivity and high mechanical robustness. The freeze-thawing treatment to the zwitterionic copolymer-PVA hydrogel after one-step polymerization was performed to prepare the hydrogels. The formation of hydrogen bonds between PVA and copolymer chains led to increased entanglement points, resulting in remarkably stretchable mechanical properties.