Highly selective CO2 separation membranes through tunable poly(4-vinylphenolate)–CO2 interactions

文献情報

出版日 2014-08-11

DOI 10.1039/C4TA03696D

インパクトファクター 12.732

著者

Markus Hammann, Dante Castillo, Christian Anger, Bernhard Rieger

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要旨

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.

掲載誌

Journal of Materials Chemistry A

CiteScore: 19.5

自己引用率: 4.7%

年間論文数: 2211

Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment

Highly selective CO2 separation membranes through tunable poly(4-vinylphenolate)–CO2 interactions

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