Photocurable (meth)acrylate compositions for forming features on the surfaces of membranes, and particularly, on membranes used in osmosis and reverse-osmosis applications, such as membrane filters.

The present disclosure relates to a ceramic graphene oxide nanofiltration membrane which is high in mechanical stability while having ion removal ability by alternately stacking GO and PEI on a ceramic nanomembrane by allowing a carboxyl group (—COOH) and an amine group (—NH.sub.2) to form a covalent bond in the presence of N-ethyl-N′-[3-(dimethylamino)propyl]carbodiimide hydrochloride (EDC), thereby forming an amide group (—CONH), and a method for manufacturing the same.

Described herein are polysulfone-based and polyether sulfone-based thin-film nanocomposite (TFNC) membranes produced by solution blow spinning (SBS) technology for forward osmosis applications, including desalination and wastewater treatment. These TFNC membranes exhibit ultra-fast water flux, low reverse salt flux, and fouling resistance.

The disclosure provides certain porous polymeric membranes, coated with cross-linked polymerized monomers, comprising monomers having a charge when immersed in an organic liquid. The membranes of the disclosure are useful in removing trace amounts of metallic impurities thereby providing ultra-pure organic liquids.

A membrane assembly is provided. The membrane assembly includes a non-metallic, porous substrate. A graphene oxide membrane is formed over the non-metallic, porous substrate. A chemical linker interface covalently binds the graphene oxide membrane to the non-metallic, porous substrate.

Molecularly porous cross-linked membranes (MPCMs) are described. For example, MPCMs prepared by interfacial polymerization of a reactive macrocycle monomer with intrinsic microporous structure are provided. Macrocycles with multiple reacting sites for cross-linking provide a hyper-cross-linked network suitable for molecular separations employing polar or apolar solvents including organic solvent nanofiltration (OSN).

The present disclosure relates, according to some embodiments, to systems, apparatus, and methods for fluid purification (e.g., water) with a ceramic membrane. For example, the present disclosure relates, in some embodiments, to a cross-flow fluid filtration assembly comprising (a) membrane housing comprising a plurality of hexagonal prism shaped membranes (b) an inlet configured to receive the contaminated fluid and to channel a contaminated fluid to the first end of the plurality of hexagonal prism shaped membranes, and (c) an outlet configured to receive a permeate released from the second end of the plurality of hexagonal shaped membranes. The present disclosure also relates to a cross-flow fluid filtration module comprising a fluid path defined by a contaminated media inlet chamber, a fluid filtration assembly positioned in a permeate chamber and a concentrate chamber.

The present disclosure provides a nanostructured cellulose membrane system with high porosity, and methods for making same. The cellulose membrane system includes carboxylate-functionalized cellulose nanofibers combined with a cellulose microfiber scaffold, which are attached by a crosslinking reaction between the nanofibers and/or between the nanofibers and the microfiber scaffold.

An article having a nanoporous membrane and a nanoporous graphene sheet layered on the nanoporous membrane. A method of: depositing a layer of a diblock copolymer onto a graphene sheet, and etching a minor phase of the diblock copolymer and a portion of the graphene in contact with the minor phase to form a nanoporous article having a nanoporous graphene sheet and a nanoporous layer of a polymer. A method of: depositing a hexaiodo-substituted macrocycle onto a substrate having a Ag(111) surface; coupling the macrocycle to form a nanoporous graphene sheet; layering the graphene sheet and substrate onto a nanoporous membrane with the graphene sheet in contact with the nanoporous membrane; and etching away the substrate.

Provided are a polymer having a constituent component represented by formula (I) below, a method for producing the polymer, a diamine compound suitable as a raw material for the polymer, a gas separation membrane haying a gas separation layer including the polymer, and a gas separation module and a gas separation apparatus that have the gas separation membrane. ##STR00001## In the formula (I), R.sup.A, R.sup.B, and R.sup.C represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a halogen atom. Herein, at least one of R.sup.A, R.sup.B, or R.sup.C represents an alkyl group having 1 to 4 carbon atoms or a halogen atom. The alkyl group having 1 to 4 carbon atoms is not trifluoromethyl and ** represents linking sites.