A gas-separation membrane obtainable from curing a composition comprising one or more curable monomers at least 30 wt % of which are monomer(s) comprising oxyethylene groups, oxypropylene groups and at least two polymerizable groups.

A method for synthesizing a water purification membrane is presented. The method includes stacking a plurality of graphene oxide (GO) nanosheets to create the water purification membrane, the stacking involving layer-by-layer assembly of the plurality of GO nanosheets and forming a plurality of nanochannels between the plurality of GO nanosheets for allowing the flow of a fluid and for rejecting the flow of contaminants. The method further includes cross-linking the plurality of GO nanosheets by 1,3,5-benzenetricarbonyl trichloride on a polydopamine coated polysulfone support.

There is provided a thin film composite (TFC) hollow fibre membrane comprising a porous hollow fibre support layer formed of a polymer and a selective layer, formed of a cross-linked polyamide, on an inner circumferential surface of the hollow fibre support layer, wherein the TFC hollow fibre membrane has a power density of 25-50 W/m.sup.2 at a pressure of 30 bar. There is also provided a method of forming the TFC hollow fibre membrane.

The present disclosure relates to a method of preparing a thin film composite layer immobilizing vesicles incorporating a transmembrane protein on a porous substrate membrane, comprising providing an aqueous solution comprising the vesicles and a di-amine or tri-amine compound, covering the surface of a porous support membrane with the aqueous solution, applying a hydrophobic solution comprising an acyl halide compound, and allowing the aqueous solution and the hydrophobic solution to perform an interfacial polymerization reaction to form the thin film composite layer.

A nanofiltration membrane with a high flux for selectively removing hydrophobic endocrine disrupting chemicals and a preparation method thereof are provided. The method includes the following steps: immersing a porous support layer into a first solution, removing excess droplets from a surface of the support layer after taking the support layer out of the first solution, and then immersing the support layer attached with the first solution into a second solution for an interfacial polymerization reaction, followed by washing after completion of the reaction to obtain the subject nanofiltration membrane. The first solution is an aqueous solution containing a polyamine monomer and an acid binding agent, and the second solution is an organic solution containing an acid chloride monomer and a metal-organic framework.

The present invention relates to a separator membrane having a hierarchical structure, a production method therefor and a xylene separation method using same, and to: a separator membrane having a hierarchical structure comprising mesopores, the separator membrane having mesopores introduced inside a microporous zeolite separator membrane, thereby being thin, having less defects and exhibiting high xylene permeation and separation performance; a production method therefor; and a xylene separation method using same.

The present disclosure provides the synthesis of an imidazolium-based functional ionic liquid copolymer (PMMA-b-PIL-R*) and a preparation method of an alloy ultra-filtration membrane. Firstly, PMMA-b-PIL-R* is prepared from methyl methacrylate (MMA) and polymerizable imidazolium-based functional ionic liquid (IL-R*) containing double bonding as the reactive monomers through sequential radical polymerization. With the use of a non-solvent induced phase separation method, PMMA-b-PIL-R* is introduced into the body of a polymeric membrane material, so as to prepare an alloy ultra-filtration membrane. A hydrogen-bond interaction is generated between the carbonyl in the molecular chain of PMMA-b-PIL-R* and the H . . . C—Cl structure in the molecular chain of the polymeric membrane material, which enhances the compatibility between the molecular chains of PMMA-b-PIL-R* and the polymeric membrane material, so that it can be stable in the ultra-filtration membrane; the imidazole groups and functional groups in the molecular chain of PMMA-b-PIL-R* can provide a good hydrophilicity.

Ion exchange membranes obtainable by curing a composition comprising: (a) a monomer comprising an aromatic group and at least one polymerisable ethylenically unsaturated group; (b) a photoinitiator which has an absorption maximum at a wavelength longer than 380 nm when measured in one or more of the following solvents at a temperature of 23° C.: water, ethanol and toluene; and (c) at least one co-initiator.

Described herein is a solution including at least one sulfone polymer, at least one water-soluble polymer, and gamma-valerolactone. Also described herein is a process of making a membrane using the solution, and a method of using the membrane for water ultrafiltration and/or dialysis.

Novel membranes suitable for use in separation applications are described, as well as processes by which the membranes are made and uses of the membranes in a range of separation applications. The membranes are obtainable by an interfacial polymerisation reaction involving two monomers, in which at least one of the monomers comprises oligomeric portions that are suitable for tuning the separation characteristics of the membrane, particularly in liquid separations, such as organic solvent nanofiltration.