Graphene was produced from graphite powder using the three best known water-based conversion approaches. The first two are based on chemical oxidation methods, only differing in the reduction process, either by the use of hydrazine or by thermal expansion, respectively. The third one is based on long-term ultrasonic exfoliation. Water/surfactant solutions were prepared with these three nanofillers and latex technology was applied for the preparation of conductive graphene/polystyrene composites, with well-dispersed graphene platelets. Microscopic studies showed that both reduction processes lead to agglomeration/wrinkling of the nanoplatelets, even though they yield composites with high conductivity and low percolation threshold. Although mechanical ultrasound exfoliation of graphite produces less defective multi-layer graphene, these platelets have a smaller lateral size and their composites exhibit a higher percolation threshold.
|Publication status||Published - 2012|
|Event||2012 NSTI Nanotechnology Conference and Expo (NSTI-Nanotech 2012) - Santa Clare, CA, United States|
Duration: 18 Jun 2012 → 21 Jun 2012
|Conference||2012 NSTI Nanotechnology Conference and Expo (NSTI-Nanotech 2012)|
|Abbreviated title||NSTI-Nanotech 2012|
|City||Santa Clare, CA|
|Period||18/06/12 → 21/06/12|