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Statements

Subject Item
n2:RIV%2F61389013%3A_____%2F13%3A00388106%21RIV13-AV0-61389013
rdf:type
n12:Vysledek skos:Concept
dcterms: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.
dcterms:title
Gas sorption properties of zwitterion-functionalized carbon nanotubes Gas sorption properties of zwitterion-functionalized carbon nanotubes
skos:prefLabel
Gas sorption properties of zwitterion-functionalized carbon nanotubes Gas sorption properties of zwitterion-functionalized carbon nanotubes
skos:notation
RIV/61389013:_____/13:00388106!RIV13-AV0-61389013
n12:predkladatel
n13:ico%3A61389013
n3:aktivita
n4:I n4:P
n3:aktivity
I, P(ME09058)
n3:cisloPeriodika
15 February
n3:dodaniDat
n7:2013
n3:domaciTvurceVysledku
n15:6965644
n3:druhVysledku
n6:J
n3:duvernostUdaju
n9:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
76190
n3:idVysledku
RIV/61389013:_____/13:00388106
n3:jazykVysledku
n19:eng
n3:klicovaSlova
carbon nanotube; zwitterion functionalized membrane; adsorption of gases
n3:klicoveSlovo
n10:carbon%20nanotube n10:zwitterion%20functionalized%20membrane n10:adsorption%20of%20gases
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[A7F7FB1DAE25]
n3:nazevZdroje
Journal of Membrane Science
n3:obor
n18:CD
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
5
n3:projekt
n17:ME09058
n3:rokUplatneniVysledku
n7:2013
n3:svazekPeriodika
429
n3:tvurceVysledku
Johnson, J. K. Marand, E. Surapathi, A. Chen, H.-Y. Sedláková, Zdeňka
n3:wos
000314115500011
s:issn
0376-7388
s:numberOfPages
7
n11:doi
10.1016/j.memsci.2012.11.021