Details

Autor(en) / Beteiligte

• Jin, Jia‐Ni
• Yang, Xi‐Ran
• Wang, Yan‐Fang
• Zhao, Lei‐Min
• Yang, Liu‐Pan
• Huang, Liping
• Jiang, Wei

Titel

Mechanical Training Enabled Reinforcement of Polyrotaxane‐Containing Hydrogel

Ist Teil von

• Angewandte Chemie International Edition, 2023-02, Vol.62 (8), p.e202218313-n/a

Auflage

International ed. in English

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Many strategies have been developed for constructing anisotropic hydrogels, however, it remains a challenge to fabricate hydrogels with anisotropic nanocrystalline domains from intrinsically soft networks. Here, we report a naphthotube‐based polyrotaxane‐containing hydrogel that can be reinforced via mechanical training. During the training process, the hydrogel can adopt reorientation of polymer chains to form anisotropic structures driven by external uniaxial force. Due to the multiple hydrogen bonding sites and movable feature of naphthotube, the sliding of naphthotube on PEG chains simultaneously inducing the zipping of adjacent polymer chains to form densely anisotropic nanocrystalline domains through hydrogen bonded networks. Thus, the trained hydrogel exhibits an enhanced tension stress of ≈110 kPa, which realize a remarkable enhancement of ≈10 times compare to initial state. This study provides a new tactic for improving the mechanical performance of soft materials. A naphthotube‐based polyrotaxane‐containing hydrogel was constructed through one‐pot photo‐initiated copolymerization. Naphthotube can slide along the PEG chain upon repeated stretching. The slide motion further induces the zipping of adjacent polymer chains to form compact hydrogen bonded nanocrystalline domains through integrated hydrogen bonds, which enabled the hydrogel to achieve reinforcement.