Ultrathin polymer films with intrinsic microporosity: Anomalous solvent permeation and high flux membranes
| Autor: | João T. Cabral, Andrew G. Livingston, Maria F. Jimenez-Solomon, Patricia Gorgojo, Santanu Karan, Him Cheng Wong |
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| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Materials science Composite number Polymer Permeance Permeation Condensed Matter Physics Electronic Optical and Magnetic Materials Biomaterials Membrane Chemical engineering chemistry Polymer chemistry Electrochemistry Phase inversion (chemistry) Layer (electronics) Polyimide |
| Popis: | wileyonlinelibrary.com Existing state of the art polymeric membranes are either integrally skinned asymmetric (ISA) or thin fi lm composite (TFC) membranes. [ 2 ] ISA membranes are produced by the phase inversion technique which leads to a dense separation layer a few hundred nanometres thick being formed on a highly porous support structure several microns in thickness. Of the ISA membranes, crosslinked polyimide (PI) membranes are probably the most widely used for OSN due to their ease of fabrication, high mechanical strength, and high stability even in harsh solvents such as tetrahydrofuran or dimethylformamide. [ 3–5 ] However, physical aging and compaction remains a challenge for ISA membranes, resulting in permeance reduction over time in operation, often by more than 50% in a few days. [ 6 ] |
| Databáze: | OpenAIRE |
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