About: Gas sorption properties of zwitterion-functionalized carbon nanotubes

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We have functionalized carbon nanotubes with carboxylic acid and zwitterion groups. The effect of functionalization by measuring the sorption of CO2, CH4, and N2 at 35 °C for pressures up to 10 bar was evaluated. Zwitterion functionalized nanotubes were found to be highly hygroscopic. Thermal gravimetric analysis indicates that water can be desorbed at about 200 °C. The adsorption of gases in zwitterion functionalized nanotubes is dramatically reduced when compared with nanotubes functionalized with carboxylic acid groups. The presence of water on the zwitterion functionalized nanotube reduces the sorption even further. Molecular simulations show that three or more zwitterion groups per tube entrance are required to significantly reduce the flux of CO2 into the tubes. Simulations also show that gas phase water is rapidly sorbed into the zwitterion functionalized nanotubes, both increasing the free energy barrier to CO2 entering the tube and also lowering the equilibrium adsorption through competitive adsorption. We have functionalized carbon nanotubes with carboxylic acid and zwitterion groups. The effect of functionalization by measuring the sorption of CO2, CH4, and N2 at 35 °C for pressures up to 10 bar was evaluated. Zwitterion functionalized nanotubes were found to be highly hygroscopic. Thermal gravimetric analysis indicates that water can be desorbed at about 200 °C. The adsorption of gases in zwitterion functionalized nanotubes is dramatically reduced when compared with nanotubes functionalized with carboxylic acid groups. The presence of water on the zwitterion functionalized nanotube reduces the sorption even further. Molecular simulations show that three or more zwitterion groups per tube entrance are required to significantly reduce the flux of CO2 into the tubes. Simulations also show that gas phase water is rapidly sorbed into the zwitterion functionalized nanotubes, both increasing the free energy barrier to CO2 entering the tube and also lowering the equilibrium adsorption through competitive adsorption. (en)
Title	Gas sorption properties of zwitterion-functionalized carbon nanotubes Gas sorption properties of zwitterion-functionalized carbon nanotubes (en)
skos:prefLabel	Gas sorption properties of zwitterion-functionalized carbon nanotubes Gas sorption properties of zwitterion-functionalized carbon nanotubes (en)
skos:notation	RIV/61389013:_____/13:00388106!RIV13-AV0-61389013
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(ME09058)
http://linked.open...iv/cisloPeriodika	15 February
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Sedláková, Zdeňka
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav makromolekulární chemie AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	76190
http://linked.open...ai/riv/idVysledku	RIV/61389013:_____/13:00388106
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	carbon nanotube; zwitterion functionalized membrane; adsorption of gases (en)
http://linked.open.../riv/klicoveSlovo	carbon nanotube adsorption of gases zwitterion functionalized membrane
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[A7F7FB1DAE25]
http://linked.open...i/riv/nazevZdroje	Journal of Membrane Science
http://linked.open...in/vavai/riv/obor	CD
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Preparation and characterization of hybrid organic-inorganic nanocomposites
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	429
http://linked.open...iv/tvurceVysledku	Sedláková, Zdeňka Chen, H.-Y. Johnson, J. K. Marand, E. Surapathi, A.
http://linked.open...ain/vavai/riv/wos	000314115500011
issn	0376-7388
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.memsci.2012.11.021

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