Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Other

Thomas Ballweg

Herbert Wolter

Werner Storch

Somchith Nique

Karl-Heinz Haas

Carsten Gellermann

Joern Probst

Claudia Stauch

Doris Hanselmann

Karl Mandel

The invention relates to inorganic hollow fibers, to a spinning mass and to a method for producing the same as well as to the use thereof for material transports, for the exchange of gases and in separation procedures. The hollow fibers according to the invention are obtainable by processing a spinning mass to a hollow fiber according to general methods, by curing said fiber thermally, via radiation induction or via chemical induction, and by removing the organic components via pyrolysis. The spinning mass is obtained by hydrolytic polycondensation of hydrolyzable compounds of silicon, aluminum, titanium and zirconium and optionally of co-condensable compounds of the elements Li, Na, Mg, Ca, Sr, Ba, Zn, Sn or Pb. The hydrolytic polycondensation is performed by adding water or moisture. If desired, monomers or oligomers which may undergo co-polymerization or (poly)addition, curing catalysts, pore generating additives or compounds of the elements Li, Na, Mg, Ca, Sr, Ba, Zn, Sn and Pb which are soluble in the reaction medium are added to the spinning mass.

Inorganic hollow fibers

The invention relates to semipermeable membranes comprising organically modified silicic-acid polycondensates, to a process for preparing them and to their use in gas exchange and in separation techniques, especially in gas separation, dialysis, pervaporation, and other filtration. The membranes of the invention can be flat or tubular and can be manufactured by conventional methods from viscous liquids obtained by hydrolytic polycondensation of organically modified, hydrolyzable silicon compounds containing C&boxH;C double bonds. The membranes are cured by addition polymerization and/or polyaddition of the C&boxH;C double bonds.

Semipermeable membranes

The invention relates to an oxygenator membrane based on organically modified silicic-acid polycondensates into a process for preparation thereof. The oxygenator membrane is obtainable by processing a viscous to resinous liquid by conventional methods to form a membrane, drying this membrane, if desired, and subjecting it to curing induced thermally and/or radiatively and/or chemically. The viscous to resinous liquid is obtained by hydrolytic polycondensation of one or more compounds of the general formula I and/or II and/or III and/or IV and/or of precondensates derived from these compound by hydrolytic condensation and, if desired, of one or more compounds of the general formula V, and, if desired, by addition of one or more monomers and/or oligomers which are capable of undergoing addition copolymerization and/or (poly)addition reaction and/or of one or more curing catalysts.

Oxygenator membrane

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Wertheim, Germany

Thomas Ballweg