| 초록 |
Robust nanoporous membrane are necessary for precise nanoscale filtration. We recently reported reactive molecular network constructed by polymerization of multifunctional amines and isocyanates. The network maintained dispersed state with reactive functionalities, enabling further polymerization in the existence of an additive. Phase separation of the sol and the additive produces bicontinuous morphology, which can be transformed into a robust nanoporous structure. Here, we introduce our findings that various polymers and organosilanes function as phase separation inducers and porogens to obtain a nanoporous membrane. The pore size distribution of the membranes were controlled by changing the fraction of the porogens. The structure-forming process was critically affected by the interplay of phase separation, gelation, and evaporation of solvent and organosilica precursors. |
