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Cu+-containing physically crosslinked chitosan hydrogels with shape memory.
- Source :
-
Express Polymer Letters . 2019, Vol. 13 Issue 9, p785-793. 9p. - Publication Year :
- 2019
-
Abstract
- Physically crosslinked chitosan hydrogels have better biocompatibility and possess unique functional characteristics but suffer from poor mechanical properties. In the current study, we prepared Cu+-containing physically crosslinked chitosan hydrogels by exploiting ammonia fumigation and reduction of Cu2+ by NaHSO3. The content of Cu+ in the prepared hydrogels was in a low range of 4.88–29.27 μmol/g. The mechanical strength of the CTS-Cu+/NH3 hydrogels was remarkably improved up to 0.25 MPa and the elongation at break increased with rising content of Cu+ due to the dynamic crosslinks between chitosan and Cu+. Moreover, the CTS-Cu+/NH3 hydrogels demonstrated evident shape memory after exposure to air by exploiting the different coordination number of Cu2+ and Cu+. Thus, the prepared hydrogels may have good potential applications as biomedical materials. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HYDROGELS
*BIOMEDICAL materials
*MEMORY
*GEOMETRIC shapes
Subjects
Details
- Language :
- English
- ISSN :
- 1788618X
- Volume :
- 13
- Issue :
- 9
- Database :
- Academic Search Index
- Journal :
- Express Polymer Letters
- Publication Type :
- Academic Journal
- Accession number :
- 137277814
- Full Text :
- https://doi.org/10.3144/expresspolymlett.2019.67