|
Silica type
|
HDMSO Molarity (M)
|
x/y
|
Enthalpy (MJ/kg)
|
SSA (m2/g)
|
dBET (nm)
|
Density (g/cc)
|
Silanol content (mmol OH/g)
|
SiOx (x)
|
Si-OH/SiO Ratio
|
|---|
| |
WetChem SiO2
|
N/A
|
N/A
|
N/A
|
500a
|
4.9
|
2.4 ± 0.0
|
5.9 ± 0.0a
|
2.11 ± 0.01
|
0.65 ± 0.09
|
|
Cold Silica
|
FSP SiO2–5/5
|
0.5
|
5/5
|
10.9
|
152
|
15.4
|
2.6 ± 0.1
|
6.1 ± 0.1
|
2.01 ± 0.01
|
0.45 ± 0.06
|
|
FSP SiO2−3/5
|
0.8
|
3/5
|
8.9
|
186a
|
14.7a
|
2.2 ± 0.0
|
5.2 ± 0.1a
|
2.17 ± 0.01
|
0.43 ± 0.06
|
|
FSP SiO2−4/5
|
0.8
|
4/5
|
10.1
|
217a
|
12.6a
|
2.2 ± 0.0
|
4.8 ± 0.1a
|
2.17 ± 0.04
|
0.35 ± 0.05
|
|
Hot Silica
|
FSP SiO2−9/3
|
0.8
|
9/3
|
16.6
|
217a
|
12.6a
|
2.2 ± 0.0
|
2.0 ± 0.1a
|
2.06 ± 0.05
|
0.13 ± 0.02
|
|
FSP SiO2−11/3
|
0.8
|
11/3
|
17.8
|
186a
|
14.7a
|
2.2 ± 0.0
|
1.6 ± 0.1a
|
2.11 ± 0.05
|
0.11 ± 0.01
|
| |
Comm. fumed SiO2
|
N/A
|
N/A
|
N/A
|
206a
|
9.0a
|
3.2 ± 0.1
|
0.7 ± 0.0a
|
2.02 ± 0.04
|
0.07 ± 0.01
|
- aThe values are from reference [18]
- SSA Specific surface area, dBET Diameter determined by Brunauer-Emmett-Teller nitrogen adsorption, FSP Flame spray pyrolysis; The nomenclature used in this table for Silica NPs indicates the method of synthesis (FSP), the molarity, and the precursor/dispersion flows ratio x/y
