A surface-modified filter membrane for filtering blood, in particular for separating blood plasma and blood serum, and a method for the production thereof, a filter provided therewith and the use thereof.

Superhydrophobic membrane structures having a beneficial combination of throughput and a selectivity. The membrane structure can include a porous support substrate; and a membrane layer adherently disposed on and in contact with the porous support substrate. The membrane layer can include a nanoporous material having a superhydrophobic surface. The superhydrophobic surface can include a textured surface, and a modifying material disposed on the textured surface. Methods of making and using the membrane structures.

A polyvinylidene fluoride (PVDF) casting membrane solution is shaped as a flat sheet membrane by thermally induced phase separation (TIPS), the PVDF membrane is defluorinated with an alkaline potassium permanganate solution, and then the carbon chain is extended with glycidyl methacrylate (GMA) as the graft monomer, and finally the nucleophilic substitution is carried out between melamine and GMA to produce a chelating microfiltration membrane for capturing and enriching heavy metals with high flux and high capacity.

The invention provides polymer-grafted and functionalized nonwoven membranes adapted for use in bioseparation processes, the membranes including a nonwoven web of polyester fibers having an average fiber diameter of less than about 1.5 microns, each of the plurality of polyester fibers having grafted thereon a plurality of polymer segments constructed of a methacrylate polymer, each polymer segment carrying a functional group adapted for binding to a target molecule. The invention also provides a method of bioseparation comprising passing a solution comprising the target molecule, such as a protein, through the nonwoven membrane of the invention such that at least a portion of the target molecule in the solution binds to the nonwoven membrane. A method for preparing a polymer-grafted and functionalized nonwoven membrane adapted for use in bioseparation processes is also provided.

This composite semipermeable membrane is provided with: a porous supporting membrane that comprises a base and a porous supporting layer; and a separating function layer that is provided on the porous supporting layer. With respect to this composite semipermeable membrane, the standard deviation of pore radius of the separating function layer as determined by positron annihilation lifetime measurement is 0.025 nm or less.

A filtration membrane coating comprising a hydrophilic polymer, a surfactant, and one or more charged compounds, each containing one or more sulfonate functionalities and one or more linkable functionalities selected from the group consisting of amine, monochlorotriazine, and dichlorotriazine. The hydrophilic polymer and surfactant form a thin primer layer which is also superhydrophilic. The primer layer improves flux, and enables improved adhesion of the one or more charged compounds, which form a charged dye layer on top of the primer layer when enhances rejection of charged divalent ions. The coating can be applied while the membrane is packaged in its final form, such as in a spiral wound or other configuration.

Disclosed are a preparation method, a product and an application of a hydrophobically modified membrane based on multi-effect thermal energy conversion, the preparation method includes the steps: S1. dispersing carbon nanotubes with surfaces carboxylated in a solvent to form a dispersion; S2. applying the dispersion evenly on a PVDF membrane, and drying to form a ready-to-use membrane; S3. performing thermo-mechanical pressure treatment of the ready-to-use membrane to form a functional membrane with strong robustness; and S4. placing the functional membrane with strong robustness in an alkane solution of PDMS containing a silane coupling agent, and then taking it out for drying.

Articles with covalently attached thiocarbonylthio-containing groups are provided. More specifically, the articles include a solid polymeric substrate with a plurality of thiocarbonylthio-containing groups covalently attached directly to a carbon atom in a polymeric backbone of the solid polymeric substrate. Methods of making the articles with covalently attached thiocarbonylthio-containing are provided. Additionally, methods of using these articles to generate further articles with covalently attached polymeric chains are provided.

The present disclosure relates to a membrane filter for water and wastewater treatment including a membrane filter, hydrophilic polymers formed on the membrane filter; and quorum quenching microorganisms cross-linked with the membrane filter by the hydrophilic polymer. The quorum quenching microorganisms are attached to the surface of the membrane filter for water and wastewater treatment, resulting in a higher initial permeation pressure than a conventional membrane, but the quorum quenching microorganisms may effectively prevent the phenomenon of quorum sensing, allowing the formation of a biofilm, thereby improving the life of the membrane filter for water and wastewater treatment.

The disclosure is directed to a surface having a binding component applied thereto for the adsorption or capture of pathogens and organic molecules or materials. The surface may be a component of a porous or nonporous substrate. The binding component may also bind a photocatalyst to the surface for photocatalytic destruction of the captured pathogens and organic molecules or materials.