A composite membrane suitable for separating a gas from a gas mixture comprising a selective layer coated on a support, wherein said selective layer comprises: a) a polymeric matrix comprising an amine polymer; b) a graphene oxide nanofiller; and c) a mobile carrier selected from an ionic liquid or an amino acid salt.

Compositions and methods directed to the production of single layer, highly porous, free-standing polytetrafluoroethylene (PTFE) membranes having macro-textured surfaces are provided. The macro-textured surfaces are due to the presence of macroscopic nodal aggregates within the membrane that are connected by fibrils The membranes have high porosity, high airflow, and a bulk density less than 1.0 g/cm3. Articles comprising the porous, single layer PTFE membranes are also provided.

Compositions and methods directed to the production of single layer, highly porous, free-standing polytetrafluoroethylene (PTFE) membranes having macro-textured surfaces are provided. The macro-textured surfaces are due to the presence of macroscopic nodal aggregates within the membrane that are connected by fibrils The membranes have high porosity, high airflow, and a bulk density less than 1.0 g/cm3. Articles comprising the porous, single layer PTFE membranes are also provided.

The present application relates to an unsupported, permanently hydrophilic filtration membrane, and its method of formation. The membrane comprises a polymeric matrix material and a cross-linked polyoxazoline hydrophilic additive blended throughout said matrix material.

The present application relates to an unsupported, permanently hydrophilic filtration membrane, and its method of formation. The membrane comprises a polymeric matrix material and a cross-linked polyoxazoline hydrophilic additive blended throughout said matrix material.

The present disclosure relates to a composite membrane formed by lamination of two or more separate porous polymeric layers, as well as to a method and system for lamination. Advantageously, the resulting composite is a single layer, being difficult to separate into its component layers, yet effectively maintains the filtering capabilities of the component layers when not laminated.

The present disclosure relates to a composite membrane formed by lamination of two or more separate porous polymeric layers, as well as to a method and system for lamination. Advantageously, the resulting composite is a single layer, being difficult to separate into its component layers, yet effectively maintains the filtering capabilities of the component layers when not laminated.

The present application relates to a multizone, unsupported, microporous, high throughput membrane. The membrane includes a first microporous zone, a second microporous zone, and a third microporous zone, where the third microporous zone is positioned between the first and second microporous zones, with the first, second, and third microporous zones being integral with one another. Further aspects of the present application include a process for making the membrane and a filtration cartridge with the membrane of the present application.

The present application relates to a multizone, unsupported, microporous, high throughput membrane. The membrane includes a first microporous zone, a second microporous zone, and a third microporous zone, where the third microporous zone is positioned between the first and second microporous zones, with the first, second, and third microporous zones being integral with one another. Further aspects of the present application include a process for making the membrane and a filtration cartridge with the membrane of the present application.

Disclosed herein a monovalent-ion-selective composite membrane comprising a polymeric cation exchange membrane and a metal-oxide-based layer, wherein said metal-oxide-based layer comprises a metal oxide or an organic-inorganic hybrid polymer, of e.g. Zn, Al, Mg, Si, Cu, W, Ni, or Ti. Also disclosed are the methods for the preparation of the membrane, and also electrodialysis assemblies comprising the membranes.