Porous Polymer Networks: Synthesis, Porosity, and Applications in Gas Storage/Separation
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Three porous polymer networks (PPNs) have been synthesized by the homocoupling of tetrahedral monomers. Like other hyper-cross-linked polymer networks, these materials are insoluble in conventional solvents and exhibit high thermal and chemical stability. Their porosity was confirmed by N 2 sorption isotherms at 77 K. One of these materials, PPN-3, has a Langmuir surface area of 5323 m2 g-1. Their clean energy applications, especially in H2, CH4, and CO2 storage, as well as CO2/CH4 separation, have been carefully investigated. Although PPN-1 has the highest gas affinity because of its smaller pore size, the maximal gas uptake capacity is directly proportional to their surface area. PPN-3 has the highest H2 uptake capacity among these three (4.28 wt %, 77 K). Although possessing the lowest surface area, PPN-1 shows the best CO2/CH4 selectivity among them. © 2010 American Chemical Society.
author list (cited authors)
Lu, W., Yuan, D., Zhao, D., Schilling, C. I., Plietzsch, O., Muller, T., ... Zhou, H.