Macromolecular Research, Vol.24, No.3, 205-208, March, 2016
Spontaneous formation of a continuous nanoporous structure in the composite films of a covalent molecular network and polymer
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A nanoporous membrane was synthesized by utilizing the formation of a three-dimensional covalent framework in a solution of urea-based network nanopaticles and a linear polymer. In this process, solvent was evaporated from the solution, and the remaining mixture separated into a network-rich phase and a polymer-rich phase. When the sol phase of the network reached its critical gelation point, the phase-separated structure became fixed into a permanent network. The different extents of shrinkage upon evapnanopore channels at the interface of the tow phases. The resulting nanoporous films displayed an ultrafiltration capability as well as superior levels of mechanical and thermal stability.
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