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.

Disclosed herein is a composite material comprising a complex of formula I: {[Cp.sub.3M.sub.3O(OH).sub.3].sub.4(A).sub.6}(I), wherein A represents a ligand of formula II, and a polyamide. There is also disclosed a thin film nanocomposite membrane, a method of manufacturing the composite material and a method of purifying brackish water or seawater with the thin film nanocomposite membrane.

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A gas separation membrane and a method of manufacturing the same are provided. The gas separation membrane includes a matrix comprising a polymer resin and a metal-organic framework (MOF) dispersed in the matrix. A method of manufacturing a gas separation membrane includes preparing a composition comprising a polymer resin monomer, a solvent and a metal-organic framework, casting the composition on a substrate, and polymerizing the polymer resin monomer.

The present invention belongs to the membrane separation area, which provides an MXene material based composite nanofiltration membrane and corresponding method. The mentioned membrane is flat membrane, which has supporting layer and functional separation layer and supporting layer is under the functional separation layer. The functional separation layer is a kind of dense ultra-thin layer, no more than 50 m, prepared with MXene and crosslinking agent. This invention is about a flat composite nanofiltration membrane which has excellent separation performance, thermal resistance and chemical stability because of the novel MXene in the functional separation layer. It can be used in the treatment of the waste water with heavy metal ions, organic solvents or other highly oxidizing solution.

Systems and methods for treating a membrane are described. The method includes causing a nanomaterial to contact at least a portion of a wall of at least on channel extending through a membrane, and causing the nanomaterial to adhere to the portion of the wall of the at least one channel. A fluid filtration system is also described. The filtration system includes a housing and a filter membrane. The housing may have a reservoir and a filter compartment. The filter membrane may have a channel extending therethrough. The channel may have a plurality of micropores along a wall thereof. The filter compartment may be configured to receive the filter membrane therein, the filter membrane configured to guide fluid thereacross to remove substances from the fluid or to modify substances in the fluid.

The present invention relates to a composite semipermeable membrane comprising a substrate, a support layer, and a separation function layer, wherein: the support layer includes particles and a thermoplastic resin having a porous structure; the particles are present in the thermoplastic resin and contain at least one material selected from the group consisting of a diene polymer, an acrylic polymer, and an ethylenic polymer; and in a cross section of the support layer, taken in the laser thickness direction, 6 or more of the particles are present in an area which is 3 m from the surface of the support layer in the layer thickness direction and 3 m in the direction along which such surface extends.

A method for producing a gas separation membrane, including the following steps: step (a): treating the surfaces of silica nanoparticles dispersed in a first solvent with a reactive functional group-containing compound, while nanoparticles are being dispersed in the solvent, to thereby prepare a first solvent dispersion of reactive functional group-modified silica nanoparticles; step (b): replacing the first solvent dispersion's dispersion medium of reactive functional group-modified silica nanoparticles prepared in step (a) with a second solvent without drying of dispersion medium, and then reacting functional group-modified silica nanoparticles with dendrimer-forming monomer or hyperbranched polymer-forming monomer in the second solvent's presence so that dendrimer or hyperbranched polymer is added to reactive functional group, to thereby prepare dendrimer- or hyperbranched polymer-bound silica nanoparticles; step (c): mixing dendrimer- or hyperbranched polymer-bound silica nanoparticles prepared in step (b) with a matrix resin; and step (d): applying mixture prepared in step (c) to a substrate, and then removing the solvent.

A gas separation membrane containing a matrix resin and hyperbranched polymer- or dendrimer-bound, heteromorphous shaped silica nanoparticles, which are formed of heteromorphous shaped silica nanoparticles having surfaces onto which a hyperbranched polymer or a dendrimer is chemically added.

Disclosed are a membrane structure including a carbon nanomaterial and NASICON-series ceramic particles, wherein an aqueous solution can pass through an electrode and a method of fabricating the same. There is disclosed a membrane structure of a flat membrane or hollow fiber membrane form, wherein the carbon nanomaterials are intertwisted to form a three-dimensional mesh-shaped structure and the NASICON-series ceramic particles material is combined with the three-dimensional mesh-shaped structure as a complex.

A water filtration membrane is provided, capable of removing heavy metal ions, filtering out particulates, filtering out bacteria, as well as removing herbicides and volatile organic compounds (VOCs) from water. The membrane is composed of a mat of randomly oriented nanoparticle-coated nanofibers. The nanofibers are covalently bonded to a plurality of substantially uniformly-distributed ceramic nanoparticles embedded in or adhered on the surface of the polymer nanofibers through reactive functional groups. The ceramic nanoparticles have a pattern of deep grooves formed on the nanoparticle surfaces. The bonding of the nanoparticles to the nanofibers is sufficient to retain the nanoparticles on the nanofiber surfaces when water flows through the water filtration membrane. The diameter of the nanofibers is 50-200 nm. The size of the nanoparticles is <40 nm, with a zeta potential of 40 to 45 mV in a dispersion medium. The nanoparticle deep grooves have an average size of approximately 1.2 nm or less.