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Titolo:
Dielectric studies of freezing behavior in porous materials: Water and methanol in activated carbon fibres
Autore:
Sliwinska-Bartkowiak, M; Dudziak, G; Sikorski, R; Gras, R; Gubbins, KE; Radhakrishnan, R;
Indirizzi:
Adam Mickiewicz Univ, Inst Phys, PL-61614 Poznan, Poland Adam Mickiewicz Univ Poznan Poland PL-61614 hys, PL-61614 Poznan, Poland N Carolina State Univ, Raleigh, NC 27695 USA N Carolina State Univ Raleigh NC USA 27695 te Univ, Raleigh, NC 27695 USA
Titolo Testata:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
fascicolo: 7, volume: 3, anno: 2001,
pagine: 1179 - 1184
SICI:
1463-9076(2001)3:7<1179:DSOFBI>2.0.ZU;2-C
Fonte:
ISI
Lingua:
ENG
Soggetto:
MONTE-CARLO; PHASE-TRANSITIONS; CONFINED LIQUIDS; SLIT PORES; SIMULATION; GLASSES; FLUIDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Sliwinska-Bartkowiak, M Adam Mickiewicz Univ, Inst Phys, Umultowska 85, PL-61614 Poznan, Poland Adam Mickiewicz Univ Umultowska 85 Poznan Poland PL-61614
Citazione:
M. Sliwinska-Bartkowiak et al., "Dielectric studies of freezing behavior in porous materials: Water and methanol in activated carbon fibres", PHYS CHEM P, 3(7), 2001, pp. 1179-1184

Abstract

We report both experimental measurements and molecular simulations of the melting and freezing behavior of two dipolar fluids, water and methanol, inactivated carbon fibres. Differential scanning calorimetry (DSC) and dielectric relaxation spectroscopy (DS) were used to determine the melting pointin these porous materials. The melting point was found to be very sensitive to the relative strength of the fluid-wall interaction compared to the fluid-fluid interaction. Monte Carlo simulations and the Landau free energy formalism were used to determine the shift in the melting point, T-m, for simple fluids in pores having weakly attractive and strongly attractive walls. The strength of the interaction of the fluid with the pore wall is shown to have a large effect on the shift in T-m, with T-m being reduced for weakly attracting walls and elevated for strongly attracting walls.

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Documento generato il 30/03/20 alle ore 12:54:04