The objective of the present invention is to provide a composite separation membrane which is excellent in not only a liquid permeable performance and a separation performance relatively but also a durability and which is particularly useful as a membrane for liquid treatment, and a method for treating a liquid by using the composite separation membrane. The composite separation membrane according to the present invention is characterized in comprising a supporting base material and a complex layer, wherein the complex layer is placed on the supporting base material, the complex layer comprises oxidized metal nanosheets, graphene oxide and an alkanolamine, and at least one of the alkanolamine is present between the oxidized metal nanosheets.

Functionalized membranes are produced via grafting of polymer brushes to the membrane surface for use, e.g., in separation and purification of biomolecules. One or more initiators are attached to the membrane surface. A reactant substrate, such as a copper metal plate, is placed adjacent the membrane. A reaction medium is then provided in fluid contact with the membrane and the reactant substrate, the reaction medium including one or more monomers, one or more ligands, and one or more solvents. The polymer brushes are grown on the membrane via Cu(0)-mediated controlled radical polymerization involving the reactant substrate and the reaction medium. This reaction process uses fewer numbers and amounts of chemicals compared to other controlled radical polymerization reactions such as ATRP. The reaction can take place at room temperature, which is more energy efficient than other CRPs which occur at a much higher temperatures. The reaction process described herein is also sixteen times faster than the standard ATRP method without sacrificing subsequent separation performance.

The present disclosure is directed to methods and systems of purifying solvents. The purified solvents can be used for cleaning a semiconductor substrate in a multistep semiconductor manufacturing process.

The present disclosure relates to a microporous hollow fiber filter membrane having a large inner diameter and a thin wall. The fiber can be used for sterile filtration of liquids or removal of particles from liquids. The disclosure further relates to a method for producing the membrane and a filter device comprising the membrane.

The invention relates to porous polymeric cellulose prepared via cellulose crosslinking. The porous polymeric cellulose can be incorporated into membranes and/or hydrogels. In preferred embodiments, the membranes and/or hydrogels can provide high dynamic binding capacity at high flow rates. Membranes and/or hydrogels comprising the porous polymeric cellulose are particularly suitable for filtration, separation, and/or functionalization media.

The present invention relates to a method for removing metal ions from an aqueous system comprising a step of filtering the aqueous system through a loaded membrane which contains a carrier membrane based on a polyarylene ethersulfone which carries anionic groups, and a cationic polymer which is a polymer comprising primary and/or secondary amino groups. The invention further relates to a loaded membrane which contains a carrier membrane based on a polyarylene ethersulfone which carries anionic groups, and a cationic polymer which is a polymer comprising primary and/or secondary amino groups.

The present invention relates to a polyelectrolyte multilayer (PEM) membrane comprised of at least one bilayer, wherein the bilayer is comprised of a layer of a polymeric polycation and a layer of a polymeric polyanion. Furthermore, present invention relates to methods for the production of these PEM membranes by layer-by-layer deposition and the use of these PEM membranes for the decontamination of liquids, preferably water.

Chemically inert, mechanically tough, cationic metallo-polyelectrolytes designed as durable anion-exchange membranes (AEMs) via ring-opening metathesis polymerization (ROMP) of cobaltocenium-containing cyclooctene with triazole as the only linker group, followed by backbone hydrogenation to provide a new class of AEMs with a polyethylene-like framework and alkaline-stable cobaltocenium cation for ion transport, which exhibit excellent thermal, chemical and mechanical stability, as well as high ion conductivity.

Filters and filter devices for removing silica from ultra pure water, and methods for using the filters and filter devices, are disclosed.

A gas detection unit is accommodated within a housing of a gas sensor and the outside atmosphere of the housing is introduced through the filter to the gas detection unit. The filter comprises an organic polymer gas-permeable filter removing siloxanes and an inorganic filter removing alcohols and passing gases to be detected.