文献类型： 外文期刊
作者： Li, Peng 1 ; Feng, Zhipan 1 ; Yu, Ziyang 1 ; Chen, Yu 1 ; Li, Puwang 2 ; Yang, Ziming 2 ; Li, Sidong 3 ; Jin, Shaohua 1 ;
作者机构： 1.Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
2.Chinese Acad Trop Agr Sci, Agr Prod Proc Res Inst, Zhanjiang 524001, Peoples R China
3.Guangdong Ocean Univ, Sch Chem & Environm Sci, Zhanjiang 524001, Peoples R China
关键词： Chitosan; Physical hydrogel; Gaseous ammonia atmosphere; Copper ion; Mechanical property; Antibacterial property
期刊名称：INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES （ 影响因子：6.953； 五年影响因子：6.737 ）
ISSN： 0141-8130
年卷期： 2019 年 133 卷
页码：
收录情况： SCI
摘要： Chitosan (CTS) physical hydrogels crosslinked under gaseous ammonia atmospheres have attracted considerable attentions for their abilities to maximize the biological activities of CTS while maintaining their biocompatibility. However, poor mechanical properties significantly limit their application. The CTS-metal ion complexing hydrogels showed better mechanical properties. However, the formation process is uncontrollable, and the high dosages of metal ions used may cause cytotoxicity. In the present work, CTS-Cu2+/NH3 physical hydrogel with excellent comprehensive properties was prepared by ammonia fumigation and metal ion complexation. Its formation mechanism and structure were investigated. The above physical hydrogel revealed excellent mechanical properties with the mechanical strength up to 030 MPa, significantly higher than CTS/NH3 hydrogel, even at much lower Cu2+ contents. And CTS-Cu2+/NH3 hydrogel is more thermal stable than CTS/NH3 hydrogel. In addition, it exhibited specific killing effects on Pseudomonas aeruginosa. These results suggest that CTS-Cu2 / NH3 physical hydrogel has a great application potential as a wound dressing. (C) 2019 Elsevier B.V. All rights reserved.
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