Cu+-containing physically crosslinked chitosan hydrogels with shape memory
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 o...
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| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Budapest University of Technology and Economics
2019-09-01
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| Series: | eXPRESS Polymer Letters |
| Subjects: | |
| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0009885&mi=cd |
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| _version_ | 1849397427993313280 |
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| author | Z. Y. Yu Y. Li Z. P. Feng Z. H. Zhang P. Li Y. Chen S. S. Chen P. W. Li Z. M. Yang |
| author_facet | Z. Y. Yu Y. Li Z. P. Feng Z. H. Zhang P. Li Y. Chen S. S. Chen P. W. Li Z. M. Yang |
| author_sort | Z. Y. Yu |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-dd6c3d0b95b542cfab0464abc8d95952 |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2019-09-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-dd6c3d0b95b542cfab0464abc8d959522025-08-20T03:38:59ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2019-09-0113978579310.3144/expresspolymlett.2019.67Cu+-containing physically crosslinked chitosan hydrogels with shape memoryZ. Y. YuY. LiZ. P. FengZ. H. ZhangP. LiY. ChenS. S. ChenP. W. LiZ. M. YangPhysically 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.http://www.expresspolymlett.com/letolt.php?file=EPL-0009885&mi=cdPolymer gelsAmmonia fumigationCuReductionShape memory |
| spellingShingle | Z. Y. Yu Y. Li Z. P. Feng Z. H. Zhang P. Li Y. Chen S. S. Chen P. W. Li Z. M. Yang Cu+-containing physically crosslinked chitosan hydrogels with shape memory eXPRESS Polymer Letters Polymer gels Ammonia fumigation Cu Reduction Shape memory |
| title | Cu+-containing physically crosslinked chitosan hydrogels with shape memory |
| title_full | Cu+-containing physically crosslinked chitosan hydrogels with shape memory |
| title_fullStr | Cu+-containing physically crosslinked chitosan hydrogels with shape memory |
| title_full_unstemmed | Cu+-containing physically crosslinked chitosan hydrogels with shape memory |
| title_short | Cu+-containing physically crosslinked chitosan hydrogels with shape memory |
| title_sort | cu containing physically crosslinked chitosan hydrogels with shape memory |
| topic | Polymer gels Ammonia fumigation Cu Reduction Shape memory |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0009885&mi=cd |
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