The final step to produce a membrane consistent with the experimentally tested membranes is to remove the glycerol to create a dry Q I structure and then solvate it with water. Solvation with water follows the same procedure as solvation with glycerol described earlier. To verify that the final system stayed in the Q I phase after solvation, we then run 1 µs of NPT equilibration. The system indeed stays in the Q I phase as expected since the monomers have been locked in place via cross-linking. If water occupies the same volume as glycerol, then the weight proportion of water should be roughly 17% [(glycerol weight proportion of 21%)/(glycerol specific gravity of 1.25)]. However, we find that the volume of the gyroid structure with 17% water by weight shrinks by 5.4% after equilibration, indicating that the proportion of water should be higher due to adsorption at the interface. When we increased the solvation level to 21% (same weight percentage as glycerol), volume only shrank by 1.6% after equilibration. We calculated the transport properties at both solvation levels to understand their dependence on water solvation.