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Developing efficacious wound dressings could effectively prevent bacterial infection and accelerate wound healing. Herein, we developed chitosan composite hydrogels cross\u2010linked by multifunctional diazo resin (DR) as antibacterial dressings for improved wound healing. The composite hydrogels were in situ formed by electrostatic interactions, chelation interactions, and covalent bonds between carboxylated chitosan and DR under ultraviolet assisted without small photosensitizer. The resultant hydrogels (noted as DR\u2010CCH) showed good stability at different DR concentrations in physiological buffers. The antibacterial assays showed the DR\u2010CCH could inhibit and kill <jats:italic>Escherichia coli<\/jats:italic> and <jats:italic>Staphylococcus aureus<\/jats:italic>. What is more, our hydrogels could accelerate wound healing in vivo. The present study demonstrates this composite DR\u2010CCH with trace zinc has potential for accelerated wound healing.<\/jats:p>","DOI":"10.1002\/jbm.a.36952","type":"journal-article","created":{"date-parts":[[2020,4,21]],"date-time":"2020-04-21T08:19:30Z","timestamp":1587457170000},"page":"1890-1898","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":21,"title":["Chitosan composite hydrogels cross\u2010linked by multifunctional diazo resin as antibacterial dressings for improved wound healing"],"prefix":"10.1002","volume":"108","author":[{"given":"Lilong","family":"Gao","sequence":"first","affiliation":[{"name":"Institute of Biomedical Materials and Engineering College of Materials Science and Engineering, Qingdao University  Qingdao China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hui","family":"Zhang","sequence":"additional","affiliation":[{"name":"Institute of Biomedical Materials and Engineering College 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