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Water contact angles (θw) on unmodified and organosilane-modified BCs. The contact angles were measured on at least four random locations of each sample, and the values were expressed as mean±SD
| Samples | θW (°) |
|---|---|
| Air dried BC | 56.3±8.0 |
| Freeze dried BC | - |
| OTS-modified air dried BC | 90.7±5.1 |
| OTS-modified freeze dried BC | 112.4±9.5 |
| APTES-modified air dried BC | 67.6±2.3 |
| APTES-modified freeze dried BC | - |
