Journal
CHEMICAL ENGINEERING JOURNAL
Volume 428, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.131049
Keywords
Biomimetic hydrogel; Ultra-stretchability; Underwater adhesion to adipose surfaces; Long-ranged attractive forces; Cytocompatibility
Categories
Funding
- National Natural Science Foundation of China (NSFC) [11772004, 11772006, 11972001, 11972002, 51803057, 91848201]
- Beijing Natural Science Foundation [Z200017]
- China Postdoctoral Science Foundation [2021M690211]
- Shenzhen Institute of Synthetic Biology Scientific Research Program [DWKF20190002]
- Natural Science Foundation of Hebei Province [B2020508008]
- Hebei Province Science Foundation for Youths [E2017508045]
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The adhesive hydrogel, inspired by hydra tentacles, shows ultra-stretchability and strong adhesion to adipose surfaces, making it suitable for various biomedical and flexible electronics applications.
Adhesive hydrogels hold great significance in various biomedical applications. However, the maintenance of high extensibility and adhesion to adipose matters still remain challenging. Inspired by hydra tentacles, we utilise flexible polymeric ionic crosslinkers for constructing densely crosslinked networks. The derived hydrogel was ultra-stretchable (over 54 times) even in the fully swollen state in water. Due to dense electrostatic bonding sites and hydrophobic phases, it displayed fast (-30 sec), repeatable and long-lasting (over 14 days) underwater adhesion to adipose surfaces such as fat, octopus and fish epidermis in aqueous environments. Moreover, the excellent cytocompatibility and antibacterial ability made it suitable for a variety of applications related to biomedicine and flexible electronics. This biomimetic work addresses new possibility for the design rationale for highly stretchable and lipophilic underwater adhesives.
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