1 Introduction
2 Experimental
2.1 Materials
3 Testing methods
3.1 Nitrogen adsorption
3.2 Thermal analysis
3.3 Determination of bulk density
3.4 Scanning electron microscopy
4 Results and discussion
4.1 Pressure and temperature effects
Sample | SBET (m2/g) | Smicro (m2/g) | Vp (cm3/g) | Dp (nm) | d (g/cm3) | Sample | SBET (m2/g) | Smicro (m2/g) | Vp (cm3/g) | Dp (nm) | d (g/cm3) |
---|---|---|---|---|---|---|---|---|---|---|---|
SiO2 | 372 | 32 | 1.61 | 17.33 | 0.134 | Collagen | – | – | – | – | 0.365 |
SiO2-200-30 | 360 | 22 | 1.05 | 11.67 | 0.135 | SiO2-Coll (mix) | 260 | 23 | 1.13 | 17.32 | 0.203 |
SiO2-200-60 | 341 | 14 | 0.88 | 10.31 | 0.152 | SiO2-Coll-200-30 | 257 | 20 | 0.91 | 14.14 | 0.136 |
SiO2-200-120 | 305 | 16 | 0.69 | 9.10 | 0.160 | SiO2-Coll-200-60 | 255 | 18 | 0.85 | 13.30 | 0.146 |
SiO2-Coll-200-120 | 243 | 14 | 0.79 | 13.06 | 0.173 | ||||||
SiO2-400-30 | 144 | 17 | 0.27 | 7.53 | 0.228 | SiO2-Coll-400-30 | 153 | ~ 0 | 0.31 | 8.20 | 0.260 |
SiO2-400-60 | 62 | 8 | 0.17 | 10.80 | 0.309 | SiO2-Coll-400-60 | 87 | ~ 0 | 0.22 | 9.99 | 0.326 |
SiO2-400-120 | 32 | 5 | 0.10 | 12.01 | 0.387 | SiO2-Coll-400-120 | 50 | ~ 0 | 0.13 | 10.29 | 0.425 |
HAp | 78 | 10 | 0.46 | 23.81 | 0.520 | HAp-Coll (mix) | 58 | 7 | 0.32 | 22.15 | 0.474 |
HAp-200-30 | 77 | 8 | 0.40 | 20.66 | 0.607 | HAp-Coll-200-30 | 58 | 6 | 0.32 | 21.84 | 0.521 |
HAp-200-60 | 74 | 8 | 0.43 | 23.12 | 0.632 | HAp-Coll-200-60 | 54 | 5 | 0.28 | 20.56 | 0.545 |
HAp-200-120 | 68 | 8 | 0.39 | 23.17 | 0.658 | HAp-Coll-200-120 | 55 | 4 | 0.31 | 22.68 | 0.555 |
HAp-400-30 | 58 | 5 | 0.27 | 18.50 | 0.702 | HAp-Coll-400-30 | 40 | 2 | 0.15 | 15.04 | 0.576 |
HAp-400-60 | 53 | 6 | 0.26 | 19.86 | 0.737 | HAp-Coll-400-60 | 25 | 1 | 0.07 | 11.21 | 0.593 |
HAp-400-120 | 48 | 6 | 0.23 | 18.96 | 0.754 | HAp-Coll-400-120 | 9 | 1 | 0.03 | 15.21 | 0.624 |