Journal
CARBOHYDRATE POLYMERS
Volume 177, Issue -, Pages 116-125Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2017.08.106
Keywords
Graphene oxide; Chitosan; Layered structure; High strength; Shape memory
Categories
Funding
- National Natural Science Foundation of China [21174017]
- Beijing Municipal Natural Science Foundation of China [2102040]
- Cultivation Project for Technology Innovation Program of BIT [2011CX01032]
Ask authors/readers for more resources
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 5 wt% GO are 5.35 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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available