Asymmetric articles are described including a porous substrate with two opposing major surfaces and a porous structure extending between the surfaces, and a polymeric coating on one of the major surfaces and extending into the porous structure to a depth of the porous structure. Methods for making an asymmetric composite article are also provided, including providing a porous substrate, treating the porous substrate with a plasma treatment or a corona treatment from one major surface to a depth of the porous structure between the two major surfaces. The method further includes applying a coating solution to the treated porous substrate and drying the coating solution to form a composite asymmetric composite article having a polymeric coating on one major surface and extending into the porous structure to the depth of the treated porous structure.

A radiation curable composition for preparing a polymeric membrane includes a) a membrane polymer selected from the group consisting of a polysulfone (PSU), a polyether sulfone (PES), a polyether etherketone (PEEK), a polyvinylchloride (PVC), a polyacrylonitrile (PAN), a polyvinylidene fluoride (PVDF), a polyimide (PI), a polyamide (PA) and copolymers thereof; b) a hydrophobic monomer or oligomer having at least two free radical polymerizable groups independently selected from the group consisting of an acrylate group, a methacrylate group, an acrylamide group, a methacrylamide group, a styrene group, a vinyl ether group, a vinyl ester group, a maleate group, a fumarate group, an itaconate group, and a maleimide group; and c) an organic solvent for the membrane polymer and the hydrophobic monomer. A polymeric membrane and a method for manufacturing the membrane are also disclosed.

A composite electrolyte film includes a composite electrolyte layer including: a first domain including a plurality of two-dimensional nanostructures, and a second domain which is disposed in an interstitial space between neighboring two-dimensional nanostructures of the plurality of two-dimensional nanostructures, wherein the plurality of two-dimensional nanostructures includes a first electrolyte.

Disclosed is a hollow fiber membrane module including a case and a hollow fiber membrane built in the case, wherein the hollow fiber membrane contains a polysulfone-based polymer and a hydrophilic polymer, and satisfies the following (A) and (B), and an amount of an eluted substance contained in a liquid obtained by circulating ultrapure water heated at 37 C. through a passage of an inner surface side of the hollow fiber membrane for 4 hours at 200 mL/min is 1.0 mg/m.sup.2 or less: (A) an insoluble component accounts for less than 3% by mass of the total mass of the hollow fiber membrane when the hollow fiber membrane is dissolved in N,N-dimethylacetamide; and (B) a flexible layer exists on a surface of a functional layer in a wet state and the flexible layer has a thickness of 7 nm or more. The present invention provides a hollow fiber membrane module including a hollow fiber membrane containing a polysulfone-based polymer and a hydrophilic polymer built therein, which elutes little eluted substance and exhibits high biocompatibility, while change in performance due to crosslinking of the hydrophilic polymer is suppressed.

A system and a method for purifying a produced water using a nanomembrane formed from polymeric waste are provided. The method includes placing the nanomembrane into an aqueous solution, wherein a surface of the nanomembrane is functionalized with carboxyl groups. Carbon dioxide is injected into the aqueous solution, and bivalent alkaline earth cations are adsorbed on the surface of the nanomembrane in the presence of carbonate ions (CO.sub.3.sup.2) to form carbonate crystals on the surface of the nanomembrane.

The present invention relates to porous hollow fiber membranes suitable for hemodialysis, hemodiafiltration or hemofiltration of blood and processes for their production involving UV irradiation of the membrane.

Methods for hydrophilizing porous PTFE membranes, and hydrophilized membranes, are disclosed.

Composite membrane having a separating membrane layer characterized in that a separating membrane layer is produced by curing laterally modified silicone acrylates of the general Formula I ##STR00001##

Disclosed in the present disclosure is a preparation method for a chelating membrane for purifying wet electronic chemicals, including the following steps: performing hydrophilic treatment on a porous PTFE membrane to obtain a hydrophilic base membrane; sequentially cleaning a chelating resin with a hydrochloric acid solution, a sodium hydroxide solution and deionized water, and then drying; grinding and sieving the cleaned and dried chelating resin to obtain a powder; mixing the powder with polyisobutylene and a polyhexafluoroethylene emulsion, and performing vacuum defoaming to form a membrane coating solution; coating the hydrophilic base membrane with the membrane coating solution to prepare a chelating membrane; and sequentially washing the chelating membrane with a hydrochloric acid solution, a sodium hydroxide solution and pure water until the chelating membrane is neutral, and then drying and storing the chelating membrane.

Disclosed herein are rolled-membrane microfluidic diffusion devices and corresponding methods of manufacture. Also disclosed herein are three-dimensionally printed microfluidic devices and corresponding methods of manufacture. Optionally, the disclosed microfluidic devices can function as artificial lung devices.