Physicochemical properties of PSAs derived from PTES/TEOS.
| Samplesa | Density (g cm−3) | S BET (m2 g−1) | Pore sizeb (nm) | E (MPa) | CA (°) |
|---|---|---|---|---|---|
| SA | 0.0811 | 838.35 | 12.41 | —c | —c |
| PSA-4 | 0.1552 | 794.58 | 10.44 | 0.0150 | 146.21 |
| PSA-6 | 0.1765 | 560.00 | 15.42 | 0.2745 | 152.49 |
| PSA-7 | 0.1811 | 215.09 | 30.21 | 0.5568 | 155.22 |
| PSA-7-T | 0.1825 | 181.39 | 25.13 | 0.4611 | 152.05 |
a
The number after PSA indicates the molar fraction of PTES; T after the number means the surface is modified by TMCS.
b
Mean pore size of PSAs.
c
Compression modulus and contact angle of supercritical CO2 dried SA were undetectable.