Tailoring of the physical and mechanical properties of biocompatible graphene oxide/gelatin composite nanolaminates: Via altering the crystal structure and morphology

Rama K. Layek (Corresponding Author), Vijay Singh Parihar, Mikael Skrifvars, Farzin Javanshour, Mart Kroon, Mikko Kanerva, Jyrki E. Vuorinen, Minna Kellomäki, Essi Sarlin

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

Abstract

Despite substantial progress being made relating to 2D-nanofiller-based composite nanolaminates, the fabrication of composite nanolaminates with enhanced ductility and toughness is still challenging. In this study, layered structure graphene oxide (GO)/gelatin powder (GP) composites nanolaminates with enhanced ductility and toughness have been achieved by a simple vacuum filtration of aqueous dispersion of GO/GP composite solution containing 5 wt% of GO. The composite film containing 5 wt% GO shows outstanding improvement of 200% in the stress at break value, with simultaneous enhancement of 52% of the strain at break value compared to GP film. A significant improvement in toughness from 2.2 MJ m-3 to 9.5 MJ m-3 is observed in the composite film containing 5 wt% GO. These significant enhancements of the mechanical properties of the composite film are obtained via the formation of an intercalated nanolaminate structure, H-bonding interactions, and the tailoring of the crystal structure of GP in the composite film, as proved via field-emission scanning electron microscopy, Fourier-transform infrared spectroscopy, and wide-angle X-ray diffraction studies. The growing of fibroblast cells on the composite films signifies that they are not cytotoxic. These GO/GP composites with significant mechanical properties and biocompatibility are very promising for various biomedical applications.

Original languageEnglish
Pages (from-to)4781-4791
Number of pages11
JournalMaterials Advances
Volume2
Issue number14
DOIs
Publication statusPublished - 21 Jul 2021
MoE publication typeA1 Journal article-refereed

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