Thermoosmosis in semipermeable membranes

M. S. Dariel; O. Kedem

doi:10.1021/j100571a010

Thermoosmosis in semipermeable membranes

M. S. Dariel, O. Kedem

Research output: Contribution to journal › Article › peer-review

40 Scopus citations

Abstract

Thermoosmotic flow in the presence and absence of an osmotic pressure difference was measured in cellulose acetate and other synthetic membranes. The thermoosmotic pressures in cellulose acetate membranes were found to be a function of temperature, and very high compared to those previously observed in other membranes. Values between 0.94 × 10⁶ and 3.5 × 10⁶ dyn cm^-2 deg^-1 were observed. An analysis of the flow equations shows that the heat of transport across a membrane is a sum of two terms: the homogeneous heat of transport in the membrane phase and the enthalpy of dissolution of water in the membrane.

Original language	English
Pages (from-to)	336-342
Number of pages	7
Journal	Journal of Physical Chemistry
Volume	79
Issue number	4
DOIs	https://doi.org/10.1021/j100571a010
State	Published - 1 Jan 1975
Externally published	Yes

ASJC Scopus subject areas

General Engineering
Physical and Theoretical Chemistry

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abstract = "Thermoosmotic flow in the presence and absence of an osmotic pressure difference was measured in cellulose acetate and other synthetic membranes. The thermoosmotic pressures in cellulose acetate membranes were found to be a function of temperature, and very high compared to those previously observed in other membranes. Values between 0.94 × 106 and 3.5 × 106 dyn cm-2 deg-1 were observed. An analysis of the flow equations shows that the heat of transport across a membrane is a sum of two terms: the homogeneous heat of transport in the membrane phase and the enthalpy of dissolution of water in the membrane.",

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AB - Thermoosmotic flow in the presence and absence of an osmotic pressure difference was measured in cellulose acetate and other synthetic membranes. The thermoosmotic pressures in cellulose acetate membranes were found to be a function of temperature, and very high compared to those previously observed in other membranes. Values between 0.94 × 106 and 3.5 × 106 dyn cm-2 deg-1 were observed. An analysis of the flow equations shows that the heat of transport across a membrane is a sum of two terms: the homogeneous heat of transport in the membrane phase and the enthalpy of dissolution of water in the membrane.

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Thermoosmosis in semipermeable membranes

Abstract

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