Polymer Rigidity Improves Microporous Membranes

摘要

Gas separation with membranes has been commercialized for more than 30 years, and includes processes such as the production of nitrogen (N_2) from air and the removal of carbon dioxide (CO_2) from natural gas. Commercial membranes have been largely derived from poly-rnmers with moderately rigid chains that pack closely to create small intermolecular spaces (or "free volume") that impart moderate to high gas selectivity.