Journal
CHEMICAL ENGINEERING JOURNAL
Volume 420, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.129668
Keywords
Injectable hydrogel; metal-organic framework; Photocatalytic antibacterial; Wound healing
Categories
Funding
- National Outstanding Youth Science Foundation [51825302]
- National Natural Science Foundation of China [11832008, 51773023, 21734002, 92059107]
- National Key R&D Program of China [2017YFB0702603, 2016YFC1100300]
- Fundamental Research Funds for the Central Universities [2020CDJQYA075, 2020CDJYGZL009]
- Chongqing Outstanding Young Talent Supporting Program [CQYC201905072]
- Returning Overseas Scholar Innovation Program [CX2018062]
- Natural Science Foundation of Chongqing Municipal Government [cstc2018jcyjAX0368, cstc2020jcyj-msxmX0834]
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This study introduced a biomimetic injectable double-network hydrogel using semiconductor nanomaterials to enhance ROS generation for antibacterial properties and wound healing acceleration.
Antibiotic resistance of bacteria is one of the greatest threats to wound healing, which necessitates the need for alternative strategies to eradicate bacteria in the wound site. Taking advantage of the reactive oxygen species (ROS)-generating capability of photocatalytic semiconductor nanomaterials under light irradiation, here we report a biomimetic injectable double-network hydrogel using oxidized sodium alginate and carbohydrazidemodified methacrylated gelatin that mimics the extracellular matrix, which was further embedded with semiconductor-like metal-organic frameworks (MOFs) encapsulating noble metal nanoparticles (Au@ZIF-8). This composite design substantially improved the ROS generation under visible light actuation (>400 nm) compared with pristine ZIF-8, owing to its reinforced light absorption and charge carrier separation by the Aumediated surface plasmon resonance (SPR) and Schottky junction. The composite hydrogels not only showed remarkable bactericidal activity against both E. coli and S. aureus, but also significantly accelerated wound healing at optimal safety. Altogether, this injectable double-network hydrogel could simultaneously provide antibacterial and pro-healing capabilities, which may have translational potential as wound dressing materials.
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