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1. (WO2018122308) ISOTROPIC POROUS MEMBRANE AND METHOD OF PREPARING THE SAME

Pub. No.:    WO/2018/122308    International Application No.:    PCT/EP2017/084712
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Fri Dec 29 00:59:59 CET 2017
IPC: B01D 67/00
B01D 69/02
B01D 71/68
Applicants: VITO NV (VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK NV)
Inventors: EYKENS, Lies
DOTREMONT, Chris
DE SITTER, Kristien
Title: ISOTROPIC POROUS MEMBRANE AND METHOD OF PREPARING THE SAME
Abstract:
Method of preparing a porous membrane, comprising forming a homogeneous solution comprising a polymer, a solvent and at least 0.5% by weight of an additive. The solution is cast to form a cast layer, and the cast layer is exposed to a vapour phase to induce phase separation followed by immersion in a coagulation bath. The additive has an average molecular mass of at least 100000 g/mole, and the solution has a coagulation value between 0.5% and 10% with respect to a mixture of 0% water and 50% of the solvent on weight basis. Obtained membranes comprise a porous isotropic layer extending from a first surface of the membrane through at least 0% of a thickness of the membrane.