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Polymermembranen auf der Basis von Polyvinylidenfluorid, Verfahren zu deren Herstellung und deren Verwendung

Polymermembranes based on polyvinylidene fluoride, a method of their production and their use
 
: Groebe, A.; Chmiel, H.

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Frontpage ()

DE 1989-3904544 A: 19890215
DE 1989-3904544 A: 19890215
EP 1990-902757 AW: 19900212
DE 3904544 C2: 19901206
EP 409950 A: 19910130
B01D0071
German
Patent, Electronic Publication
Fraunhofer IGB ()

Abstract
The invention relates to polymer membranes based on polyvinylidene fluoride (PVDF), a method of their production and their use for ultrafiltration. Using known techniques, the membranes are made from homogeneous solutions comprising between 5 and 30 per cent PVDF by weight and between 0.01 and 30 per cent sulphonic acids and/or their salts by weight; these salts are obtained by sulphonating the polyether ketones of formula (I) or by subsequent neutralization of the sulphonic acids. The membranes are then treated with methanolic solutions comprising between 0.1 and 5 per cent of the above-mentioned sulphonic acids and/or their salts by weight. This process yields membranes with excellent hydrophilic properties, high thermal and mechanical stability and high transmembrane flows. -(-O-p-C<-6 H<-4 -O-p-C<-6 H<-4 -CO-p-C<-6 H<-4 -)<-n -

: http://publica.fraunhofer.de/documents/PX-28922.html