Effect of the C/O ratio in graphene oxide materials on the reinforcement of epoxy-based nanocomposites
| Autor: | Robert J. Young, Cristina Vallés, Ian A. Kinloch, Fabian Beckert, Laura Burk, Rolf Mülhaupt |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Polymers and Plastics Composite number Oxide 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound law Materials Chemistry Physical and Theoretical Chemistry Composite material Tensile testing chemistry.chemical_classification Nanocomposite Graphene Epoxy Polymer 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences chemistry Percolation visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Journal of Polymer Science Part B: Polymer Physics. 54:281-291 |
| ISSN: | 0887-6266 |
| DOI: | 10.1002/polb.23925 |
| Popis: | The effect of the C/O ratio of graphene oxide materials on the reinforcement and rheological percolation of epoxy-based nanocomposites has been studied. As-prepared graphene oxide (GO) and thermally-reduced graphene oxide (TRGO) with higher C/O ratios were incorporated into an epoxy resin matrix at loadings from 0.5 to 5 wt %. Tensile testing revealed good reinforcement of the polymer up to optimal loadings of 1 wt %, whereas agglomeration of the flakes at higher loadings caused the mechanical properties of the composites to deteriorate. The level of reduction (C/O) of the graphene oxide filler was found to influence the mechanical and rheological properties of the epoxy composites. Higher oxygen contents were found to lead to stronger interfaces between graphene and epoxy, giving rise to higher effective Young's moduli of the filler and thus to superior mechanical properties of the composite. The effective modulus of the GO in the nanocomposites was found to be up to 170 GPa. Furthermore, rheological analysis showed that highly oxidized graphene flakes did not raise the viscosity of the epoxy resin significantly, facilitating the processing considerably, of great importance for the development of these functional polymeric materials. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2016, 54, 281–291 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text