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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Hammann, Markus Rieger, Bernhard Anger, Christian Castillo, Dante |
| Copyright Year | 2014 |
| Abstract | A series of phenolate-containing polyelectrolytes were prepared via post-polymerization treatment of poly(4-vinylphenol) with tetraalkylphosphonium hydroxides (tetrabutylphosphonium hydroxide [P4444][OH], tributyltetradecylphosphonium hydroxide [P44414][OH] and trihexyltetradecylphosphonium hydroxide [P66614][OH]) or with tributylmethylphosphonium methylcarbonate [P4441][CO3CH3]. Also, mono- and dimethoxy-substituted vinylphenols were synthesized, polymerized and treated with [P66614][OH] to gain the corresponding polyelectrolytes. CO2 absorption capacity was measured as a function of the cation species and as a function of methoxy-substituents at the phenyl ring. ATR-IR and 13C MAS NMR spectroscopy confirmed chemisorption of CO2via formation of a phenol–carbonate complex at room temperature and 1 bar CO2 partial pressure. The introduction of an oligo(ethylene glycol) methacrylate co-monomer proved to suppress the formation of crystalline domains in the resulting material, enhancing CO2 absorption capacity and thin film stability. The polyelectrolytes reached a reversible CO2 absorption capacity of up to 0.65 in terms of CO2 molecule per phenolate group at 35 °C and 1 bar CO2 pressure, making them promising candidates for CO2-selective polymeric membrane materials. Thin coatings of the polyelectrolytes atop of a polysiloxane-based membrane support exhibited excellent adhesion and homogeneity as well as a highly competitive ideal CO2/N2 permeability selectivity of up to 67.7 at 15 °C and 1 bar transmembrane pressure. |
| Starting Page | 16389 |
| Ending Page | 16396 |
| Page Count | 8 |
| File Format | HTM / HTML PDF |
| ISSN | 20507488 |
| Volume Number | 2 |
| Issue Number | 39 |
| Journal | Journal of Materials Chemistry A |
| DOI | 10.1039/c4ta03696d |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Hydroxide Ion Phenyl group Magic angle spinning Nuclear magnetic resonance Chemisorption Partial pressure Oligomer Ethylene glycol Cell membrane |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Renewable Energy, Sustainability and the Environment Materials Science |
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