The present invention relates to a technology for manufacturing a nanocomposite membrane comprising a graphene oxide coating layer with a thickness of 1 nm to 50 nm, which is formed on various supports and has nanopores, and a reduced graphene oxide nanocomposite membrane, and applying the membranes to gas separation. The graphene oxide nanocomposite membrane for gas separation of the present invention has excellent gas permeability and selectivity at the same time, and especially, excellent hydrogen gas permeability and hydrogen gas selectivity compared with carbon dioxide, and the reduced graphene oxide nanocomposite membrane has remarkably enhanced hydrogen gas permeability and hydrogen gas selectivity compared with carbon dioxide, and thus the membranes are applicable as a gas separation membrane in an industrial field involving a hydrogen separation process. Furthermore, a graphene oxide nanocomposite membrane for gas separation can be provided, in which strong binding force between a support and a graphene oxide coating layer is induced by modifying surfaces of various supports and thus the graphene oxide coating layer is not easily delaminated.

Disclosed are a ceramic membrane for water treatment using oxidation-treated SiC and a method for manufacturing the same. An object of the present invention is to manufacture a ceramic membrane for water treatment, which can be sintered at a low temperature of 1,050? C. or less, in which a SiO.sub.2 oxide layer formed during an oxidation process induces volume expansion so as to prevent defects due to the contraction of a coating layer during general sintering. The ceramic membrane for water treatment using the oxidation treated SiC includes a porous ceramic support layer; and a SiC layer formed on the porous ceramic support layer and including SiC particles on which a SiO.sub.2 oxide layer formed on a surface thereof.

A filter membrane for selectively separating a specific material from other materials in a processing medium includes a membrane including resin material and having openings formed such that the openings selectively separate a specific material from other materials in a processing medium. The membrane has a first surface and a second surface on the opposite side with respect to the first surface such that the first surface receives the processing medium supplied to the membrane, the openings are formed through the membrane such that each of the openings has an opening part extending from the second surface toward the first surface and an expansion part expanding a size of the opening part and extending from the opening part to the first surface, and the first surface of the membrane is divided into multiple regions.

A spiral-wound acid gas separation membrane element (1) includes a wound body including a separation membrane (2), a feed-side channel component (3), and a permeate-side channel component (4) wound in a laminated state around a core tube (5). The core tube (5) has a group of holes for allowing communication between a permeate-side spatial portion defined by the permeate-side channel component (4) and a spatial portion inside the core tube (5), the group of holes being present on an end side of the core tube (5).

A two-layer photo-responsive membrane including a polymer layer and a support layer, the polymer layer being disposed on a surface of the support layer. The polymer layer is formed of a graft copolymer that contains a hydrophobic backbone and multiple side chains, the side chains each consisting of repeat units that switch between a hydrophobic form and a hydrophilic form upon exposure to a light of a specific wavelength. The polymer layer has a molecular weight cut-off of 3,000 to 250,000 Daltons and a thickness of 50 nm to 10 ?m; and the support layer has a molecular weight cut-off of 50 to 250,000 Daltons. Also disclosed is a method of preparing this two-layer photo-responsive membrane.

Problems that the invention is to solve is to provide a composite hollow fiber membrane being excellent in separation performance and permeation performance, having high membrane strength, and capable of being easily produced, and a method for producing the same. The present invention relates to a composite hollow fiber membrane including at least a layer (A) and a layer (B), in which the composite hollow fiber membrane has an outer diameter of 20 to 350 ?m and an inner diameter of 14 to 250 ?m, the tensile modulus of the composite hollow fiber membrane is from 1,000 to 6,500 MPa, the layer (A) contains a cellulose ester, the thickness of the layer (A) is from 0.01 to 5 ?m, and the open pore ratio H.sub.A of the layer (A) and the open pore ratio H.sub.B of the layer (B) satisfy H.sub.A<H.sub.B.

Disclosed herein are ceramic selective membranes and methods of forming the ceramic selective membranes by forming a selective silica ceramic on a porous membrane substrate. Representative ceramic selective membranes include ion-conductive membranes (e.g., proton-conducting membranes) and gas selective membranes. Representative uses for the membranes include incorporation into fuel cells and redox flow batteries (RFB) as ion-conducting membranes.

Disclosed herein are ceramic selective membranes and methods of forming the ceramic selective membranes by forming a selective silica ceramic on a porous membrane substrate. Representative ceramic selective membranes include ion-conductive membranes (e.g., proton-conducting membranes) and gas selective membranes. Representative uses for the membranes include incorporation into fuel cells and redox flow batteries (RFB) as ion-conducting membranes.

A device and methods are disclosed herein for fluid removal during wound treatment or for removal or dialysis of components from blood or tissue. A device is disclosed that includes a multilayer membrane including a plurality of layers; an electroactive polymer within each layer; and a controller operably connected to sequentially activate the electroactive polymer to alter one or more sizes of the plurality of the variably-sized pores within one or more layers of the multilayer membrane. A device is disclosed that includes a multilayer membrane including a plurality of layers; an actuator operably attached to the plurality of layers of the multilayer membrane; and a controller operably activating the actuator to alter a relative lateral position of the two or more layers of the multilayer membrane to align two or more of the plurality of pores within the plurality of layers of the multilayer membrane.

An ion exchange membrane has multiple layers of ionic polymers which each contain substantially different chemical compositions. i.e. varying side chain lengths, varying backbone chemistries or varying ionic functionality. Utilizing completely different chemistries has utility in many applications such as fuel cells where for example, one layer can help reduce fuel crossover through the membrane. Or one layer can impart substantial hydrophobicity to the electrode formulation. Or one layer can selectively diffuse a reactant while excluding others. Also, one chemistry may allow for impartation of significant mechanical properties or chemical resistance to another more ionically conductive ionomer. The ion exchange membrane may include at least two layers with substantially different chemical properties.