Polarographic method for the determination of the permeability coefficient of polymers towards oxygen dissolved in water

A polarographic method is described for the determination of the permeability coefficient of polymer membranes towards oxygen dissolved in water. The system is characterized by strong stirring on both sides of the membrane to evaluate boundary layer effects on the permeability. The permeability coef...

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Bibliographic Details
Published in:Journal of membrane science 1992, Vol.65 (1), p.93-100
Main Authors: Friedmann, Gilbert, Sperry, Pascal, Brossas, Jean
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Membranes
oxygen permeability
polarography
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Summary:A polarographic method is described for the determination of the permeability coefficient of polymer membranes towards oxygen dissolved in water. The system is characterized by strong stirring on both sides of the membrane to evaluate boundary layer effects on the permeability. The permeability coefficients are measured as a function of stirring rate and of thickness and area of the membrane. The permeabilities of polytetrafluoroethylene, polystyrene, polydimethylsiloxane, poly-4-methyl-1-pentene-acrylate copolymers and hydrogels were measured. Our device allows the determination of the absolute permeability P M with a single sample of any material, because of the easy variation of the area, and the determination of P M with a single measurement when P M ⩽30 × 10 −10 cm 3 (STP)-cm/cm −2-sec-cmHg.
ISSN:0376-7388
1873-3123
DOI:10.1016/0376-7388(92)87056-4