title: Strong composite films with layered structures prepared by casting silk fibroin-graphene oxide hydrogels.
abstract: Composite films of graphene oxide (GO) sheets and silk fibroin (SF) with layered structures have been prepared by facile solution casting of SF-GO hydrogels. The as-prepared composite film containing 15% (by weight, wt%) of SF shows a high tensile strength of 221 ± 16 MPa and a failure strain of 1.8 ± 0.4%, which partially surpass those of natural nacre. Particularly, this composite film also has a high modulus of 17.2 ± 1.9 GPa. The high mechanical properties of this composite film can be attributed to its high content of GO (85 wt%), compact layered structure and the strong hydrogen bonding interaction between SF chains and GO sheets.
authors.affiliation: Department of Chemistry, Tsinghua University, Beijing 100084, People's Republic of China.
authors.forename: Liang
authors.initials: L
authors.lastname: Huang
authors.forename: Chun
authors.initials: C
authors.lastname: Li
authors.forename: Wenjing
authors.initials: W
authors.lastname: Yuan
authors.forename: Gaoquan
authors.initials: G
authors.lastname: Shi
mesh_terms: D000818:Animals; D005349:Fibroins / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D020100:Hydrogels / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D011108:Polymers / Q000737:chemistry; D013718:Tensile Strength; D023822:Tissue Engineering
chemical_list: D020100:Hydrogels; D010087:Oxides; D011108:Polymers; D006108:Graphite; D005349:Fibroins