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Bicomponent membranes. IV. Influence of membrane formation principles on the structure of the active layer of membranes

✍ Scribed by Th. Weigel; W. Makschin; W. Albrecht; V. Gröbe; D. Paul

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
604 KB
Volume
42
Category
Article
ISSN
0323-7648

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✦ Synopsis

Polyacrylonitrile membranes are prepared using three different membrane preparation principles. Characterization of the structure of the skin layer is carried out in more detail by parameters of separation curves and their pore sizc distribution function, the former being based on a logarithmic normal distribution. Under constant conditions of measurement, comparing considerations are reflected about the structure of the separating active layer of PAN bicomponent membranes and two differently prepared PAN monocomponent membranes. The parameters of the separation curves and pore size distributions are discussed.

Bikomponentenrnembranen. J V . EinfluP oon Membranbildungsprinzipien auf die Struktur der trennuktiven Begrenzungsschicht

Polyacrylnitril-Membranen werden nach drei unterschiedlichen Membranbildungsprinzipien hergestellt. Die nahere Charakterisierung der Struktur der trennaktiven Schiehten erfolgt anhand von Parametern der Trennkurven und der daraus berechneten PorengroBenverteilungen, wobei eine logarithmische Normalverteilung zugrunde gelegt wird. Bei konstanten MeBbedingungen werden vergleichende Betrachtungen der strukturellen Besonderheiten der trennaktiven Begrenzungsschicht von PAN-Bikomponentenmembranen und zwei unterschiedlich hergestellten PAN-Monokomponentenmembranen angestellt und anhand von Parametern der Trennkurven oder der PorengrbSenverteilung diskutiert.

' ) Diameter of test molecules (nearly adequate pore (liarnetcr) a t the rejection Q = 100%

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