Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5156487 | Carbohydrate Polymers | 2017 | 10 Pages |
Abstract
The layered nanocomposite hydrogel films containing chitosan (CS) and graphene oxide (GO) have been prepared by water evaporation induced self-assembly and subsequent physical cross-linking in alkaline solution. The layered CS/GO hydrogel films obtained have a nacre-like brick-and-mortar microstructure, which contributes to their excellent mechanical properties. The tensile strength and elongation at break of the hydrogel films with 5Â wt% GO are 5.35Â MPa and 193.5%, respectively, which are comparable to natural costal cartilage. Furthermore, the CS/GO hydrogel films exhibited pH-driven shape memory effect, and this unique phenomenon is mainly attributed to the reversible transition of partial physically cross-linking corresponding to hydrogen bondings and hydrophobic interactions between CS polymer chains due to pH changing.
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Yaqian Zhang, Min Zhang, Haoyang Jiang, Jinli Shi, Feibo Li, Yanhong Xia, Gongzheng Zhang, Huanjun Li,