One-step surface modification of graphene oxide and influence of its particle size on the properties of graphene oxide/epoxy resin nanocomposites
| Autor: | Alen Vizintin, Alenka Vesel, Silvester Bolka, Miroslav Huskić, Ema Žagar, Miran Mozetič, Alojz Anžlovar |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Polymers and Plastics Oxide General Physics and Astronomy Graphite oxide 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound law Materials Chemistry Graphite Nanocomposite Graphene Organic Chemistry Epoxy 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering visual_art visual_art.visual_art_medium Particle size 0210 nano-technology Glass transition |
| Zdroj: | European Polymer Journal. 101:211-217 |
| ISSN: | 0014-3057 |
| Popis: | Graphene oxide (GO) was synthesized from expanded graphite with particle size of 130 μm (GO130) and 1200 μm (GO1200) and characterized. GO130 was oxidized to a higher degree and contained larger concentration of C O bonds. After the synthesis, the GO was kept in a form of viscous slurry in methanol to prevent formation of graphite oxide. The slurry was mixed with a hardener and methanol was evaporated. The nanocomposites with GO content from 0.25 to 1.0 wt% were prepared by mixing the epoxy resin, hardener and hardener/GO mixture and cured. The particles were homogeneously distributed within the polymer matrix as observed by SEM on the plasma etched samples. The glass transition temperature increased from 81 °C to up to 90 °C. The Young’s modulus increased by 35% and 30% with the addition of GO130 and GO1200, respectively, while the tensile strength increased for 10% only when GO1200 had been added. The optimum concentration of GO in the nanocomposite is from 0.25 to 0.50 wt%. |
| Databáze: | OpenAIRE |
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