Helmholtz-zentrum Geesthacht Zentrum Fur Material Und Kustenforschung Gmbh

Gkss-forschungszentrum Geesthacht Gmbh

Charité – Universitätsmedizin Berlin

Thomas Weigel

Karola Lützow

Wolfgang Albrecht

Roland Hilke

Andreas Lendlein

Dieter Paul

Frank Klein

Petra Reinke

Karl Kratz

Friedrich Jung

Thomas Groth

Lars-Ingemar Dahms

Andreas Kurtz

Andy R•mhild

Samy Madbouly

Mario Rettschlag

Filiana Santoso

Bernhard Hiebl

Barbara Seifert

Andy Römhild

The present invention relates to a method for testing different selected materials and/or surface structures for the culture of cells and/or microorganisms.

Method and kit for testing various selected materials and/or surface structures for culturing cells

The present invention provides an article with at least one switching segment. The switching segment comprises a shape-memory compound and an isolating region surrounding the shape memory compound. The present invention also provides a method of producing such an article.

Item with at least one thermoprogrammable switching section for applications in contact with materials having high heat transfer coefficients

The invention relates to a polyimide microparticles which can be obtained by means of the following steps: a) a polymer solution consisting of at least one polyimide polymer and a solvent or a solvent mixture is produced according to methods known per se, b) microparticles are formed from the polymer solution by spraying or by thermal phase inversion, c) the microparticles obtained in step b) are treated with an aqueous functionalization solution containing an amine-containing modifier at a high temperature, with or without stirring, and d) the modified obtained are washed and optionally dried, according to methods known per se.

Polyimide microparticles

In a method of manufacturing a double-layer membrane of different polymers or polymer mixtures with opposite blood-compatible and tissue-compatible surfaces, a first polymer solution of a blood-compatible polymer and a second solution of a tissue-compatible polymer are extruded concurrently in layered form through a nozzle into a coagulation bath so as to form a double layer membrane.

Double-layer hollow membrane for bio-reactor applications

In a polyimide molded body, in particular a polyimide membrane which is functionalized with a chemical group and a method for production thereof, a molded body or membrane is obtained, whereby a pre-prepared polyimide body, as starting material, is brought into contact with an aqueous modifier solution for a period of 1 second to 1 hour. The modifier solution contains at least one modifier substance at least partially dissolved therein, which comprises a primary or secondary amino group, or a similar amino group and additionally at least one further functional group per molecule. The polyimide molded body is brought to an elevated temperature, either during the contact period with the modifier solution or thereafter and then purified and dried. The membrane obtained according to the invention may be functionalized in a targeted adjustable manner and has a high functionalization degree. The functionalization may be achieved simply and economically in an aqueous medium. The membranes obtained are suitable for use in the technical, biotechnological and medical fields and as starter membranes for the production of affinity membranes.

Functionalized polyimide molded body and functionalized polyimide membrane

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Wilhelmshorst, Germany

Thomas Weigel