Functionalized polyimide molded body and functionalized polyimide membrane

US7273551B2 · kind B2 · utility

Assignee

• GKSS-Forschungszentrum Geesthacht GmbH · DE

Inventors

• Wolfgang Albrecht · Berlin, DE
• Lars-Ingemar Dahms · Berlin, DE
• Karola Lützow · Berlin, DE
• Thomas Weigel · Wilhelmshorst, DE
• Roland Hilke · Teltow, DE
• Dieter Paul · Neunkirchen, DE

Key dates

• Filing date: Sep 8, 2003
• Grant date: Sep 25, 2007
• Expiry date: Dec 26, 2023

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2379/00
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

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.