Surface modified membranes for gas separation, and a method for preparing thereof

• Main Authors: Sandru, Eugenia Mariana, Sandru, Marius, Stenstad, Per Martin
• Format: Patent
• Language: English
• Published: 20.06.2023
• Subjects: PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

The present invention relates to a CO2 selective gas separation membrane and a method for preparing the gas separation membrane and the use thereof. The CO2 selective gas separation membrane comprises a gas permeable or porous support layer; and at least one gas permeable polymer layer, which is surface modified with polymer chains having CO2 philic groups, wherein the gas permeable polymer layer has a spatially controlled distribution of the CO2 philic groups on the surface thereof. The method of preparing the CO2 selective gas separation membrane, comprises the steps of: depositing at least one gas permeable polymer layer on a porous or gas permeable support layer to form a dense membrane, and surface modifying the dense membrane with polymer chains having CO2 philic groups, to obtain spatially controlled distribution of the CO2 philic groups on the surface thereof.