Table 1. Freezing conditions along with key physical, structural and mechanical properties of aerogel scaffold.
Aerogel | νf [cm h-1] |
Tf [°C] |
ρb
a [g cm-3] |
ε [%] b | SBET
c [m2 g-1] |
Max.Strength, δ [MPa] |
Young’ s Module,ε [MPa] | Pore diameter, Dp, BJH [nm] |
Macro-pore d, φ (μm) |
---|---|---|---|---|---|---|---|---|---|
silica-SF-10-33 | 33 | -10 | 0.115 | 91 | 493 | 0.39 | 4.03 | 18 | 1.10±0.31 |
silica-SF-10-66 | 66 | -10 | 0.108 | 93 | 531 | 0.36 | 4.24 | 16 | 0.52±0.14 |
silica-SF-196-33 | 33 | -196 | 0.075 | 94 | 433 | 1.6 | 7.3 | 17 | 17.84±2.75 |
silica-SF-196-66 | 66 | -196 | 0.077 | 94 | 466 | 0.92 | 6.7 | 16 | 6.35±2.63 |
Bulk density (ρbulk)
porosity (ε %)
specific surface area (SBET)
macro-sized pore diameter (obtained from SEM micrographs).