Composition and properties of the poly(epoxy-MA-co-POSS-MA) matrix monoliths and ZIF-8-MOF-modified monoliths.
| Column designation | Monomer-to-solvent ratio | Epoxy-MAa (%, w/w) | POSS-MAa (%, w/w) | Propanolb (%, w/w) | PEG-400 (%, w/w)b | Cycle of MOF growthc (n) | Permeability Kd (×10−14 m2) |
|---|---|---|---|---|---|---|---|
| a | 25 : 75 | 12.5 | 12.5 | 28.5 | 46.5 | — | 12.19 |
| b | 35 : 65 | 17.5 | 17.5 | 24.7 | 40.3 | — | 2.08 |
| c | 45 : 55 | 22.5 | 22.5 | 20.9 | 34.1 | — | 0 |
| d | 35 : 65 | 12.5 | 22.5 | 24.7 | 40.3 | — | 0 |
| e | 35 : 65 | 15.0 | 20.0 | 24.7 | 40.3 | — | 1.27 |
| f | 35 : 65 | 20.0 | 15.0 | 24.7 | 40.3 | — | 6.87 |
| g | 35 : 65 | 22.5 | 12.5 | 24.7 | 40.3 | — | 14.63 |
| h | 35 : 65 | 20.0 | 15.0 | 24.7 | 40.3 | 2 | 5.93 |
| i | 35 : 65 | 20.0 | 15.0 | 24.7 | 40.3 | 4 | 5.21 |
| j | 35 : 65 | 20.0 | 15.0 | 24.7 | 40.3 | 6 | 4.69 |
| k | 35 : 65 | 20.0 | 15.0 | 24.7 | 40.3 | 8 | 4.26 |
| l | 35 : 65 | 20.0 | 15.0 | 24.7 | 40.3 | 10 | 2.98 |
a
The percentages of POSS-MA, and Epoxy-MA in the monomer mixtures, respectively.
b
The percentages of two porogenic reagents in porogenic solvents, respectively. Porogenic reagents were composed of propanol and PEG-400.
c
The n refers to the number of in situ growth cycles of ZIF-8 MOF in the column.
d
The permeability was measured using methanol. The viscosity of methanol was 0.544.