Research Article
Preparation of Colloidal Dispersions of Graphene Sheets in Organic Solvents by Using Ball Milling
Table 1
Fraction of graphene remaining after centrifugation.
| Solvent | Surface tension (mJ m-2) | Remaining after 4000 r.p.m. of centrifugation | Concentration (g/ml) | wt% remaining |
| NMP | 41 | 88.9 | 35.56 | TMU | 34.7 | 88.28 | 35.31 | DMF | 35.2 | 96.67 | 38.67 | THF | 26.4 | 76.03 | 30.41 | Acetone | 23.7 | 66.6 | 26.64 | Ethanol | 22.27 | 10.32 | 4.128 | Formamide | 58.35 | 3.67 | 1.468 |
|
|