Table 1.
Bulk density (ρB) and shrinkage during coagulation, solvent exchange (Scoag/exch) and scCO2 drying (Sdry) steps and total shrinkage (Stot) of aerogels derived from solutions of cotton linters (CL) in TBAF/DMSO (CL-TBAF), [EMIm][OAc]/DMSO (CL-EMIm), NMMO·H2O (CL-NMMO) and Ca(SCN)2·8H2O/LiCl (CL-CTO)
| Sample name | CL-TBAF | CL-EMIm | CL-EMIm | CL-NMMO | CL-CTO | CL-CTO |
|---|---|---|---|---|---|---|
| CL (w%) | 3.0 | 1.5 | 3.0 | 3.0 | 1.5 | 2.0 |
| ρB (mg cm−3) | 67.1 ± 3.3 (7) | 40.2 ± 3.5 (7) | 55.3 ± 1.4 (5) | 62.9 ± 3.0 (9) | 29.9 ± 0.8 (7) | 48.2 ± 2.7 (6) |
| Scoag/exch (%) | 20 ± 4 (7) | 18 ± 7 (7) | 9 ± 6 (5) | 11 ± 5 (9) | 17 ± 2 (7) | 24 ± 3 (6) |
| Sdry (%) | 19 ± 3 (7) | 42 ± 2 (7) | 26 ± 3 (5) | 24 ± 3 (9) | 7 ± 2 (7) | 10 ± 2 (6) |
| Stot (%) | 35 ± 5 (7) | 52 ± 5 (7) | 33 ± 6 (5) | 33 ± 2 (9) | 23 ± 3 (7) | 31 ± 4 (6) |
The respective number of samples is given in brackets