POROUS POLYIMIDE POLYMER MEMBRANE WITH TENSILE STRENGTH

Process for the preparation of a porous polyimide membrane comprising the following steps:i- from a starting polymer material comprising at least one of the following polyamic acid, PAA, selected among an electronically neutral polyamic acid, enPAA, and a negatively charged polyamic acid, NPAA, comp...

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Main Authors DERATANI, André, BOUYER, Denis, QUEMENER, Damien, CAO, Edgar, GUENOUN, Patrick, MERICQ, Jean-Pierre, JACOB, Matthieu, KAMMAKAKAM, Irshad, LORAIN, Olivier, GARATE, Hernan, FAUR, Catherine
Format Patent
LanguageEnglish
French
German
Published 05.06.2024
Subjects
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:Process for the preparation of a porous polyimide membrane comprising the following steps:i- from a starting polymer material comprising at least one of the following polyamic acid, PAA, selected among an electronically neutral polyamic acid, enPAA, and a negatively charged polyamic acid, NPAA, comprising cations to maintain electroneutrality, carrying out an acid-base reaction in water to obtain a highly negatively charged polyamic acid, HNPAA, comprising cations to maintain electroneutrality having a molar ratio of [total amounts of cationic charges] / [total amount of carboxylic functions of the PAA] from 0.90 to 1 ;ii- performing a reaction involving a phase inversion technique ; andiii- carrying out an imidization reaction on the HNPAA to obtain the porous polyimide membrane.
Bibliography:Application Number: EP20220306757