Cu+-containing physically crosslinked chitosan hydrogels with shape memory

eXPRESS Polymer Letters

Z. Y. Yu¹ 

关键词: polymer gels;    ammonia fumigation;    Cu+;    reduction;    shape memory;   

DOI  :  10.3144/expresspolymlett.2019.67

学科分类：生物科学（综合）

来源: eXPRESS Polymer Letters

【 摘 要 】

Physically crosslinked chitosan hydrogels have better biocompatibility and possess unique functional characteristicsbut suffer from poor mechanical properties. In the current study, we prepared Cu+-containing physically crosslinkedchitosan hydrogels by exploiting ammonia fumigation and reduction of Cu2+ by NaHSO3. The content of Cu+ in the preparedhydrogels was in a low range of 4.88–29.27 μmol/g. The mechanical strength of the CTS-Cu+/NH3 hydrogels was remarkablyimproved up to 0.25 MPa and the elongation at break increased with rising content of Cu+ due to the dynamic crosslinks betweenchitosan and Cu+. Moreover, the CTS-Cu+/NH3 hydrogels demonstrated evident shape memory after exposure to airby exploiting the different coordination number of Cu2+ and Cu+. Thus, the prepared hydrogels may have good potential applicationsas biomedical materials.

【 授权许可】

CC BY