The present invention offers a forward osmosis composite hollow fiber membrane module having hollow fiber bundles comprising a plurality of hollow fibers, the hollow fibers having a separation layer composed of a macromolecular polymer thin film provided on the inner surface of a microporous hollow fiber supporting membrane, wherein the membrane area of the hollow fiber bundle is at least 1 m.sup.2, and a variation coefficient for the average thickness of the separation layer in the radial direction and the lengthwise direction of the hollow fiber bundles, as calculated by a method of measuring the mass of the separation layer portion in a scanning electron microscope image of a cross section of the separation layer in the thickness direction, is 0% to 60%.

A process for separating components or a fluid mixture using membranes comprising a selective layer made from copolymers of an amorphous per fluorinated dioxolane and a fluorovinyl monomer. The resulting membranes have superior selectivity performance for certain fluid components of interest while maintaining fast permeance compared to membranes prepared using conventional perfluoropolymers, such as Teflon® AF, Hyflon® AD, and Cytop®.

A hydrogen permeable membrane device is provided that includes a porous ceramic layer having a material that includes zirconia, Yttria-stabilized zirconia (YSZ), γ/Al.sub.2O.sub.3, and/or YSZ— γ/Al.sub.2O.sub.3, and a porous Pd film or porous Pd-alloy film deposited on the a mesoporous ceramic layer.

The present disclosure relates to hollow fiber tangential flow filters, including hollow fiber tangential flow depth filters, for various applications, including bioprocessing and pharmaceutical applications, systems employing such filters, and methods of filtration using the same.

An embodiment of the present invention provides a polyolefin microporous membrane, including: a first porous layer containing a polyolefin and having a structure including a first rod-shaped crystal extending in one direction and plural first plate-shaped crystals arranged in a separated state and intersecting the first rod-shaped crystal, and a second porous layer containing a polyolefin and having a structure including a second rod-shaped crystal extending in another direction intersecting the one direction and plural second plate-shaped crystals arranged in a separated state and intersecting the second rod-shaped crystal.

Disclosed are methods for preparing a thin film composite membrane by subjecting a solution comprising one or more zwitterionic copolymers to an electrospraying process, thereby preparing the thin film composite membrane.

The present invention provides a separation membrane suitable for separating water from a liquid mixture containing an alcohol and water. A separation membrane 10 according to the present invention contains polyimide including a structural unit represented by formula (1). A is a linking group having a solubility parameter, in accordance with a Fedors method, of more than 5.0. B is a linking group having a solubility parameter of more than 8.56. R.sup.1 to R.sup.6 each are independently a hydrogen atom, a halogen atom, a hydroxyl group, a sulfonic group, an alkoxy group having 1 to 30 carbon atoms, or a hydrocarbon group having 1 to 30 carbon atoms. Ar.sup.1 and Ar.sup.2 each are a divalent aromatic group.

Embodiments include methods of fabricating a zeolite-like metal-organic framework with an ana-topology (ana-ZMOF) thin film membrane, the methods comprising: (1) modifying a substrate with ana-ZMOF crystal precursors in the presence of polyvinylpyrrolidone; and (2) intergrowing the ana-ZMOF crystal precursors in the presence of polyvinylpyrrolidone to form a continuous defect-free thin film of an ana-ZMOF intergrown on the substrate. Embodiments further include methods of separating chemical species comprising contacting an ana-ZMOF thin film membrane with a fluid composition containing one or more chemical species and separating at least one of the chemical species.

A supported carbon molecular sieve (CMS) membrane is made by contacting a film of a carbon forming polymer on a polymer textile to form a laminate. The laminate is then heated to a temperature for a time under an atmosphere sufficient to carbonize the film and polymer textile to form the supported CMS membrane. The supported CMS membrane formed is a laminate having a carbon separating layer graphitically bonded to a carbon textile, wherein the carbon separating layer is a continuous film. The supported CMS membranes are particularly useful for separating gases such as olefins from their corresponding paraffins.

A two-layer membrane including a polymer layer and a support layer, the polymer layer being disposed on a surface of the support layer. The polymer layer, having a pore size of at most 50 nm and a thickness of 5 nm to 10 μm, is formed of an amphiphilic copolymer that contains both charged groups and hydrophobic groups. The support layer has a pore size of 3 nm to 10 μm, which is larger than the pore size of the polymer layer. Also disclosed is a process of filtering a liquid using the two-layer membrane described above.