Increasing Membrane Permeability by Increasing the Polymer Crystallinity: The Unique Case of Polythiophenes
| Autor: | Tönjes Koschine, Zidan Zhang, Cédric Van Goethem, Erik Nies, Mikael Monga Mulunda, Marcel Dickmann, Michael Wübbenhorst, Guy Koeckelberghs, Ivo F.J. Vankelecom, Rhea Verbeke, Werner Egger |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Polymers and Plastics Membrane permeability Crystallization of polymers Dispersity Polymer Science NANOFILTRATION macromolecular substances 02 engineering and technology 010402 general chemistry 01 natural sciences Inorganic Chemistry Materials Chemistry Copolymer ELECTROLUMINESCENCE GAS-PERMEATION PROPERTIES MIXED-MATRIX MEMBRANES ANNIHILATION chemistry.chemical_classification Science & Technology Organic Chemistry technology industry and agriculture Polymer 021001 nanoscience & nanotechnology TRANSPORT 0104 chemical sciences Membrane chemistry Polymerization Chemical engineering SELECTIVITY Physical Sciences SEPARATION MORPHOLOGY Absorption (chemistry) CRYSTALLIZATION 0210 nano-technology |
| Popis: | © 2018 American Chemical Society. It is generally accepted in membrane technology that crystalline zones in polymeric membranes do not contribute to transport of liquids or gases. In the current study, poly(3-alkylthiophene)s (P3ATs), i.e., homopolymers and random copolymers, were synthesized to study the influence of the supramolecular organization on membrane gas separations. The monomers were polymerized via KCTCP, and GPC analysis shows that the polymers have a narrow dispersity. DSC analysis of the polymers reveals that the homopolymers, in contrast to the copolymers, crystallized, confirming their higher degree of supramolecular organization. This was supported by UV-vis absorption spectra of the polymer films, where a red-shift and a characteristic shoulder absorption peak around 600 nm were observed for the homopolymers, while absent for the copolymers. More surprisingly, the homopolymers were found to be 2 orders of magnitude more permeable to CO2 than the copolymers and also more selective. ispartof: MACROMOLECULES vol:51 issue:23 pages:9943-9950 status: published |
| Databáze: | OpenAIRE |
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