Coupled transport processes in responding membranes: the case of a single gradient
(2009) In Physical Chemistry Chemical Physics 11(40). p.9075-9081- Abstract
- We present a theoretical study of two coupled diffusion processes through a membrane which is able to respond to the presence of the diffusing substances with a phase change. The case we consider is when the direct driving force for one of the processes vanishes, i.e. when the chemical potential of one of the components, or some other intensive variable, is kept equal in the two reservoirs surrounding the membrane. The coupling of the two transport processes results in nonzero gradients inside the membrane also for the variable that is equal in the two reservoirs. There is a concomitant change in the phase coexistence compared to the behaviour expected if only
considering the external conditions. The transport properties of the... (More) - We present a theoretical study of two coupled diffusion processes through a membrane which is able to respond to the presence of the diffusing substances with a phase change. The case we consider is when the direct driving force for one of the processes vanishes, i.e. when the chemical potential of one of the components, or some other intensive variable, is kept equal in the two reservoirs surrounding the membrane. The coupling of the two transport processes results in nonzero gradients inside the membrane also for the variable that is equal in the two reservoirs. There is a concomitant change in the phase coexistence compared to the behaviour expected if only
considering the external conditions. The transport properties of the two phases within the membrane have to be different for this effect to occur, but otherwise the prerequisites are rather general. An analogous effect is expected for the case of coupled diffusion and heat conduction. Amphiphilic systems or biological membranes often show large changes in structure and transport properties due to small variations in thermodynamic variables such as temperature, the osmotic pressure of the solvent or the presence of cosolvents and cosolutes. The effects we find are therefore particularly relevant to these systems. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1453957
- author
- Åberg, Christoffer LU and Wennerström, Håkan LU
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Chemistry Chemical Physics
- volume
- 11
- issue
- 40
- pages
- 9075 - 9081
- publisher
- Royal Society of Chemistry
- external identifiers
-
- wos:000270698900013
- scopus:70350011740
- pmid:19812827
- ISSN
- 1463-9084
- DOI
- 10.1039/b909187d
- language
- English
- LU publication?
- yes
- id
- 26444a31-906a-4628-876c-41c40d8c135e (old id 1453957)
- date added to LUP
- 2016-04-01 14:16:45
- date last changed
- 2025-04-04 14:11:44
@article{26444a31-906a-4628-876c-41c40d8c135e,
abstract = {{We present a theoretical study of two coupled diffusion processes through a membrane which is able to respond to the presence of the diffusing substances with a phase change. The case we consider is when the direct driving force for one of the processes vanishes, i.e. when the chemical potential of one of the components, or some other intensive variable, is kept equal in the two reservoirs surrounding the membrane. The coupling of the two transport processes results in nonzero gradients inside the membrane also for the variable that is equal in the two reservoirs. There is a concomitant change in the phase coexistence compared to the behaviour expected if only<br/><br>
considering the external conditions. The transport properties of the two phases within the membrane have to be different for this effect to occur, but otherwise the prerequisites are rather general. An analogous effect is expected for the case of coupled diffusion and heat conduction. Amphiphilic systems or biological membranes often show large changes in structure and transport properties due to small variations in thermodynamic variables such as temperature, the osmotic pressure of the solvent or the presence of cosolvents and cosolutes. The effects we find are therefore particularly relevant to these systems.}},
author = {{Åberg, Christoffer and Wennerström, Håkan}},
issn = {{1463-9084}},
language = {{eng}},
number = {{40}},
pages = {{9075--9081}},
publisher = {{Royal Society of Chemistry}},
series = {{Physical Chemistry Chemical Physics}},
title = {{Coupled transport processes in responding membranes: the case of a single gradient}},
url = {{http://dx.doi.org/10.1039/b909187d}},
doi = {{10.1039/b909187d}},
volume = {{11}},
year = {{2009}},
}