A membrane sorbent is described, which comprises 1-6 wt % silicon carbide nanoparticles dispersed in a polymer matrix. The polymer matrix may comprise polysulfone and polyvinylpyrrolidone. The membrane sorbent is used for separating oil from a contaminated water mixture. The silicon carbide nanoparticles of the membrane sorbent may be made from rice husk ash.

The present disclosure relates to a cross-linked poly(aryl piperidinium) copolymer ionomer, with no aryl ether bond in the polymer backbone, in which a piperidinium group cross-linked by a polystyrene linker is introduced in a repeating unit, wherein the ionomer exhibits remarkably excellent chemical stability, ion conductivity, mechanical properties, dimensional stability, and durability. In addition, an anion-exchange membrane manufactured from the cross-linked poly(aryl piperidinium) copolymer ionomer has suppressed excessive swelling and greatly improved mechanical properties, alkaline stability and durability, and allow operation even under low-humidity conditions. Thus, it can be applied to membranes and binders for alkaline fuel cells, water electrolysis devices, carbon dioxide reduction, or oxidation-reduction flow batteries.

The present disclosure relates to a cross-linked poly(aryl piperidinium) copolymer ionomer, with no aryl ether bond in the polymer backbone, in which a piperidinium group cross-linked by a polystyrene linker is introduced in a repeating unit, wherein the ionomer exhibits remarkably excellent chemical stability, ion conductivity, mechanical properties, dimensional stability, and durability. In addition, an anion-exchange membrane manufactured from the cross-linked poly(aryl piperidinium) copolymer ionomer has suppressed excessive swelling and greatly improved mechanical properties, alkaline stability and durability, and allow operation even under low-humidity conditions. Thus, it can be applied to membranes and binders for alkaline fuel cells, water electrolysis devices, carbon dioxide reduction, or oxidation-reduction flow batteries.

A lithium extraction composite comprising: (i) a porous support and (ii) particles of a lithium-selective sorbent material coated on at least one surface of the support, wherein the support has a planar membrane, fiber (or rod), or tubular shape. A method for extracting and recovering a lithium salt from an aqueous solution by use of the above-described composition is also described, the method comprising (a) flowing the aqueous source solution through a first zone or over a first surface of the lithium extraction composite to result in selective lithium intercalation in the lithium-selective sorbent material in the first zone or first surface; and (b) simultaneously recovering lithium salt extracted in step (a) from said lithium-selective sorbent material by flowing an aqueous stripping solution through a second zone or over a second surface of the lithium extraction composite in which lithium ions from the first zone or first surface diffuse.

A hollow fiber membrane for separating blood plasma from blood, comprising a blood contact layer and a support layer each comprising a hydrophobic polymer, a hydrophilic polymer and vitamin E, and a method for producing said hollow fiber membrane to provide a hollow fiber membrane is described. The hollow fiber membrane is characterized by a reduced hemolysis activity so that the hollow fiber membrane can be advantageously used in plasmapheresis methods.

The disclosure provides certain porous membranes comprised of cyclic polyolefin polymers, such as poly(norbornene)s. In one embodiment, a poly(norbornene) polymer is dissolved in tetrahydrofuran, cast into a film and subjected to solvent induced phase separation to provide a porous filter membrane (i.e., film).

The disclosure provides certain porous membranes comprised of cyclic polyolefin polymers, such as poly(norbornene)s. In one embodiment, a poly(norbornene) polymer is dissolved in tetrahydrofuran, cast into a film and subjected to solvent induced phase separation to provide a porous filter membrane (i.e., film).

The present disclosure relates to a spinneret for producing hollow fiber membranes in a phase inversion process.

The present disclosure relates to a spinning beam for producing hollow fiber membranes in a phase inversion process, and to a process using the spinning beam.

A hollow fiber membrane comprising polyethersulfone, wherein the hollow fiber membrane has a structure that is non-uniform in a thickness direction, and a gradient index which is a ratio of an average pore size at an inner surface side in a cross section of the hollow fiber membrane to an average pore size at an outer surface side in the cross section is 2.00 or more.