Table 1.
Carbon content, bonding density, and surface area of grafted neat organosiloxanes and their mixtures with DMC or DEC at the SiO2 surface
| Sample | Carbon content, wt% | Bonding density ([Si(CH3R1O)), groups/nm2 where R1 = CH3, H, CH2CH2C6H9 | SBET, m2/g |
|---|---|---|---|
| SiO2 (A–300) | 0 | 0 | 278 |
| SiO2/PMHS | 2.42 ± 0.08 | 5.5 | 266 |
| SiO2/PMHS+DMC | 2.60 ± 0.04 | 6.0 | 253 |
| SiO2/PMHS+DEC | 2.17 ± 0.11 | 5.0 | 254 |
| SiO2/PDMS | 5.96 ± 1.17 | 7.2 | 220 |
| SiO2/PDMS+DMC | 6.04 ± 0.01 | 7.4 | 167 |
| SiO2/PDMS+DEC | 2.28 ± 0.20 | 2.5 | 235 |
| SiO2/CPDMS | 0.57 ± 0.04 | 0.1 | 274 |
| SiO2/CPDMS+DMC | 1.77 ± 0.01 | 0.4 | 248 |
| SiO2/CPDMS+DEC | 2.98 ± 0.28 | 0.7 | 261 |