A process for removing metal ions from aqueous systems is disclosed comprising the treatment of the aqueous system with a membrane M, wherein the membrane M has a molecular weight cut-off above 3,000 Da and comprises A.) a carrier membrane CM, wherein said carrier membrane CM has a porous structure wherein the average pore diameter on one surface is smaller than in the rest of the membrane, thus forming rejection layers R on one side of carrier membrane CM, and B.) an active layer A comprising at least one polymer P comprising a plurality of functional groups G capable of forming stable complexes with metal ions selected from Ca, Mg, Al, Cu, Ni, Pb, Zn, Sb, Co, Cr, Cd, Hg and/or Ag, wherein said active layer A is located on the surfaces of the rejection layers R of carrier membrane CM and throughout the porous structure of carrier membrane CM.

A polymer composite membrane, a method for fabricating same, and a lithium-ion battery including same are provided. The polymer composite membrane includes a porous base membrane and a heat-resistant layer covering at least one side surface of the porous base membrane, the heat-resistant layer includes a plurality of heat-resistant sub-layers sequentially stacked, and pore-blocking temperatures of the heat-resistant sub-layers are sequentially increased from inside to outside; each of the heat-resistant sub-layers includes at least one of a first heat-resistant polymer material and a second heat-resistant polymer material, and each of the heat-resistant sub-layers is separately configured as a fiber network structure; the melting point of the first heat-resistant polymer material is not less than 200° C.; and the melting point of the second heat-resistant polymer material is not less than 100° C.

Described herein is a crosslinked graphene and biopolymer (e.g. lignin) based composite membrane that provides selective resistance for solutes while providing water permeability. The membrane may include optional additional functional additives in a crosslinked material matrix that provides enhanced salt separation from water. Methods for making such membranes, and methods of using the membranes for dehydrating or removing solutes from water are also described.

Described herein is a crosslinked graphene and biopolymer (e.g. lignin) based composite membrane that provides selective resistance for solutes while providing water permeability. The membrane may include optional additional functional additives in a crosslinked material matrix that provides enhanced salt separation from water. Methods for making such membranes, and methods of using the membranes for dehydrating or removing solutes from water are also described.

A semipermeable composite membrane that reduces an environmental load, and a method of producing the semipermeable composite membrane. A semipermeable composite membrane includes, on a porous support, a semipermeable membrane containing a crosslinked polyamide and a cellulose nanofiber. A method of producing the semipermeable composite membrane includes obtaining a mixed solution containing the cellulose nanofiber, water, and an amine component, and obtaining the semipermeable composite membrane by making the mixed solution be in contact with the porous support, thereafter, causing a cross-linking reaction of the amine component in the mixed solution, with the amine component adhering to the porous support.

A semipermeable composite membrane that reduces an environmental load, and a method of producing the semipermeable composite membrane. A semipermeable composite membrane includes, on a porous support, a semipermeable membrane containing a crosslinked polyamide and a cellulose nanofiber. A method of producing the semipermeable composite membrane includes obtaining a mixed solution containing the cellulose nanofiber, water, and an amine component, and obtaining the semipermeable composite membrane by making the mixed solution be in contact with the porous support, thereafter, causing a cross-linking reaction of the amine component in the mixed solution, with the amine component adhering to the porous support.

The present invention relates to a fouling resistance reverse osmosis membrane, a method of manufacturing the same, and a fouling resistance reverse osmosis module including the same, and more specifically, to a fouling resistance reverse osmosis membrane, which has excellence in anti-fouling properties against fouling materials such as organic substances, inorganic substances, and the like, antimicrobial performance against microorganisms and the like, a flux, a salt removal rate, and retention of anti-fouling properties and antimicrobial performance, a method of manufacturing the same, and a fouling resistance reverse osmosis module including the same.

The present invention relates to a fouling resistance reverse osmosis membrane, a method of manufacturing the same, and a fouling resistance reverse osmosis module including the same, and more specifically, to a fouling resistance reverse osmosis membrane, which has excellence in anti-fouling properties against fouling materials such as organic substances, inorganic substances, and the like, antimicrobial performance against microorganisms and the like, a flux, a salt removal rate, and retention of anti-fouling properties and antimicrobial performance, a method of manufacturing the same, and a fouling resistance reverse osmosis module including the same.

Disclosed are fouling resistant filtration membranes comprising a polymeric thin-film membrane comprising a surface. Also disclosed are methods of modifying thin-film filtration membranes, thereby improving, for example, the anti-fouling properties of the membranes. Also disclosed are methods of purifying water using the disclosed membranes. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

Disclosed are fouling resistant filtration membranes comprising a polymeric thin-film membrane comprising a surface. Also disclosed are methods of modifying thin-film filtration membranes, thereby improving, for example, the anti-fouling properties of the membranes. Also disclosed are methods of purifying water using the disclosed membranes. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.