The invention a solvent-resistant polymeric nanofiltration membrane and preparation method thereof. The method includes subjecting a diamine monomer and a dianhydride monomer to cyclization imidization in a first polar organic solvent at 160 to 230° C., to form a polyimide, wherein the diamine monomer includes a diamine monomer with a carboxyl group and a diamine monomer without a carboxyl group; dissolving the polyimide in a second polar organic solvent, to form a membrane-forming solution; performing phase inversion to obtain an intermediate membrane; treating the intermediate membrane with an organic solution of a metal salt, so that the metal ion is coordinated and cross-linked with the carboxyl group in the polyimide, to obtain a solvent-resistant polymeric nanofiltration membrane, wherein the metal salt is a divalent and/or a multi-valent metal salt. The invention also discloses use of the solvent-resistant polymeric nanofiltration membrane in the separation and/or purification of a compound.

A method for preparing a durably hydrophilic and uniform-pore ultrafiltration membrane is disclosed herein. Chemical reactions between the functional groups and the active bonds of the molecular chains in the membrane materials are initiated perform the grafting of hydrophilic chains on the polymer chains under conventional dissolution conditions of the polymer membrane material (dissolution with synchronized hydrophilization), so as to realize durable hydrophilization of the membrane materials. The resulting hydrophilized polymer solution (a nascent-state membrane) is introduced into a coagulation bath to initiate a crosslinking reaction among the hydrophilic chains. The resulting crosslinking serves to synergistically regulate subsequent phase separation and membrane formation (phase separation under synergistic crosslinking).

A method of separating a mixture of fluids may comprise contacting an absorbent material with a mixture of fluids comprising a first fluid and a second fluid having different polarities, wherein the absorbent material selectively absorbs the first fluid to provide a permeate comprising the first fluid and a retentate comprising the second fluid. The absorbent material comprises a zwitterionic polymer, the zwitterionic polymer being a polymerization product of reactants comprising a zwitterionic monomer and a (meth)acrylate crosslinker. The zwitterionic monomer is selected from the group consisting of: a zwitterionic monomer of Formula I, R—(CH.sub.2).sub.m—NR′.sub.2.sup.+—(CH.sub.2).sub.n-A.sup.−, wherein R is selected from a carboxyamide, a (meth)acrylate, and an alkyl; m is an integer of from 0 to 5; each R′ is independently selected from hydrogen and an alkyl; n is an integer of from 1 to 5; and A.sup.− is SO.sub.3.sup.− or CO.sub.2.sup.−; a zwitterionic monomer of Formula II, R—(CH.sub.2).sub.m-A.sup.−-(CH.sub.2).sub.n—NR′.sub.3.sup.+, wherein R is an (meth)acrylate; m is an integer of from 1 to 5; A is PO.sub.4.sup.−; n is an integer of from 1 to 5; and each R′ is independently selected from hydrogen and an alkyl; carboxybetaine diacrylamide; (3-methacryloylamino-propyl)-(2-carboxy-ethyl)-dimethylammonium; 3-[Dimethyl-(2-hydroxyethyl)ammonio]-1-propanesulfonate; 1-methylpyridinium 3-sulfonate; and combinations thereof.

The present disclosure relates to a phenyl-modified polydimethylsiloxane (PDMS) separation membrane, a fabrication method thereof, and a use thereof in the separation of an aromatic compound, and belongs to the technical field of separation membrane materials. A phenyl-modified PDMS separation membrane comprising a substrate layer and a selective layer is provided.

Membranes suitable for use in membrane distillation are provided. Such membranes may include nano-fibrous layers with adjustable pore sizes. The membranes may include a hydrophobic nanofibrous scaffold and a thin hydrophilic protecting layer that can significantly reduce fouling and scaling problems.

Flow capture device and method for removing cells from blood The current invention discloses a blood treating and/or purifying device for removing circulating pathogens, preferably pathogenic cells, more preferably circulating tumor cells from the blood of a patient, a method of producing such a device and method to treat cancer and other diseases caused by virus infection, bacterial infection and parasites infection as well as autoimmune disorders. The described method is an extracorporeal medical therapy, thus can be done also in a hemodialysis system. The current invention also describes a device and an in-situ production method of preparing the device to remove CTC and other pathogens i.e. virus, bacteria or parasites from the bloodstream.

A filter medium according to one embodiment of the present invention comprises: a first support having a plurality of pores; a nanofiber web comprising nanofibers disposed on upper and lower portions of the first support and forming a three-dimensional network structure, and a hydrophilic coating layer formed on at least a part of an outer surface of the nanofibers, wherein the hydrophilic coating layer is formed of a hydrophilic coating composition comprising a hydrophilic polymer compound having at least one functional group selected from a hydroxyl group and a carboxyl group and a crosslinking agent comprising at least one sulfone group; and a second support having a plurality of pores interposed between the first support and the nanofiber web.

Described herein are mixed matrix filtration membranes and related, dendrimers, dendrimer particles, compositions, methods and systems and in particular mixed matrix filtration membranes with an embedded dendrimer particles and related compositions, methods, and systems wherein each dendrimer particle comprises at least two dendrimers each having at least two core chemical moieties having a core multiplicity Nc; branch cell units attached to the core chemical moiety or one to another, with the branch cell units attached one to another having a branch cells multiplicity Nb; and a number of surface functional groups Z presented on terminal branch cell units, wherein NcNb.sup.G with G≤3.

The present invention relates to an anti-fouling, semi-permeable membrane comprising a porous support layer, a thin film composite (TFC) layer formed on a surface of the support layer, and a cross-linked polyvinyl alcohol (PVA) layer formed on top of the TFC layer, wherein the cross-linked PVA layer is the reaction product of PVA and a cross-linking agent, said cross-linking agent being a polybasic acid comprising three or more acid groups or precursors thereof. The obtained membrane shows a high water flux and a low roughness suitable for an effective membrane notable for feed solution having a tendency of fouling the membrane.

Purification devices and methods remove perfluorinated compounds (PFCs) from PFC-contaminated water using temperature swing adsorption and desorption.