The present invention provides a separation membrane and a separation membrane element which are capable of exhibiting good water production performance and excellent in handleability and process passage. A separation membrane of the present invention is a separation membrane including: a separation membrane main body having a feed-side face and a permeate-side face; and a permeate-side channel member adhered to the permeate-side face of the separation membrane main body, in which the permeate-side channel member includes a composition containing at least a high-crystalline polypropylene (A) and satisfies the following requirements (a) and (b): (a) a content of the high-crystalline polypropylene (A) in the composition is from 40 to 95% by weight; and (b) the permeate-side channel member has a melting endothermic energy amount (ΔH) of from 20 to 70 J/g.

The invention relates to a vapor retarder membrane, intended to be used for improving the airtightness of a building or of a room, comprising at least one active layer having a water vapor permeability which increases with the surrounding relative humidity, said active layer comprising at least 90% by weight of a blend of ethylene/vinyl alcohol (EVOH) copolymer and of a copolyamide 6-6.6 (PA666), the latter having a melting point below 210° C.

A method of a filtration uses a hollow fiber membrane module comprising a module case; and a hollow fiber membrane bundle comprising a plurality of hollow fiber membranes bundled together and being accommodated in the module case, respective ends of the hollow fiber membranes being bonded together by a potting material. The filtration is carried out in the hollow fiber membrane module under a pressure of 0.3 to 1.2 MPa. The hollow fiber membrane module satisfies a relationship: 0.5<R/L<5 when the pressure inside the hollow fiber membrane module is 1.0 MPa without the hollow fiber membrane module being restrained, and satisfies relationships: 0<R<0.25 and 0<L<0.06 during an operation in an operation condition, where R (%) represents a radial expansion ratio at a center portion in a longitudinal direction, and L (%) represents a longitudinal expansion ratio, of the hollow fiber membrane module.

A battery separator includes a polyolefin microporous membrane having a width of 100 mm or more, and a porous layer laminated on at least one surface of the polyolefin microporous membrane. The polyolefin microporous membrane has a variation range of an F25 value in a width direction of 1 MPa or less, and the F25 value indicates a value obtained by dividing a load value measured at 25% elongation of a specimen with use of a tensile tester by a cross-sectional area of the specimen. The porous layer contains a fluorine-based resin and an inorganic particle.

The present invention relates to a method of preparing a perm-selective porous membrane and a method of separating gases using the prepared porous membrane. According to the present invention, a membrane is synthesized using a hierarchically structured alumina porous support by a counter diffusion method. During this synthesis, the diffusion rate of metal ions loaded on the porous support is controlled by controlling the pore size of the porous support, and the position at which the membrane is synthesized is controlled by synthesizing the membrane inside the support. This can increase the physical stability of the membrane and make the membrane thicker so as to ensure higher H.sub.2/CO.sub.2 separation factors.

A support nanofunctionalised with photocatalytic nanoparticles made of polymeric material, preferably transparent or translucid, characterised by a nanoroughness, measured by means of an electron microscope, comprised between 10 and 150 nm and a macroroughness, measured by means of an electron microscope, comprised between 100 and 600 ?m, wherein said nano and macro-roughness are diffused internally and/or superficially. A process for preparing the nanofunctionalised support is also described. Further, an use of the nanofunctionalised support as a photocatalyst activated by UV and/or visible light, for the decontamination of a fluid, preferably air and/or water, from organic contaminants, bacteria, moulds, odours and a combination thereof is described. Finally, a filtration device comprising at least one nanofunctionalised support of the invention associated with at least one source of UV and/or visible light configured to irradiate said at least one nanofunctionalised support is described.

Process for reducing CO2 and membrane separation arrangement. A process/arrangement for reducing the CO2 content of a gas mixture using four membrane separation steps, two of the separation steps using glassy membrane and two using rubbery membrane. A first retentate is withdrawn from the first separation step at a first withdrawal pressure and temperature and is supplied to the second separation step, a second retentate is withdrawn from the second separation step at a second withdrawal pressure and temperature and is supplied to the third separation step, a third retentate is withdrawn from the third separation step at a third withdrawal pressure and temperature and is supplied to the fourth separation step, permeates of the separation steps using the glassy membrane are combined to form a first combined permeate stream, and permeates of the separation steps using the rubbery membrane are combined to form a second combined permeate stream.

A method of moderating concentration of at least highly fluorinated alkyl materials from a contaminated aqueous feed liquid containing an original composition of between 60 parts per trillion and 300 parts per billion of the at least highly fluorinated materials per liter of water into an aqueous electronic separator having at least three chambers including a feed chamber having a liquid exit port from which a mediated aqueous contaminated feed liquid exits and a liquid input port into which the contaminated aqueous feed liquid enters the feed chamber; an anodic electrode chamber filled with an aqueous anodic liquid; and a cathodic electrode chamber filled with an aqueous cathodic liquid; wherein the feed chamber is between and adjacent to the anodic electrode chamber and the cathodic electrode chamber and the feed chamber is separated from each of the anodic electrode chamber and the cathodic electrode chamber by at least one semipermeable membrane.

A support nanofunctionalised with photocatalytic nanoparticles made of polymeric material, preferably transparent or translucid, characterised by a nanoroughness, measured by means of an electron microscope, comprised between 10 and 150 nm and a macroroughness, measured by means of an electron microscope, comprised between 100 and 600 m, wherein said nano and macro-roughness are diffused internally and/or superficially. A process for preparing the nanofunctionalised support is also described. Further, an use of the nanofunctionalised support as a photocatalyst activated by UV and/or visible light, for the decontamination of a fluid, preferably air and/or water, from organic contaminants, bacteria, moulds, odours and a combination thereof is described. Finally, a filtration device comprising at least one nanofunctionalised support of the invention associated with at least one source of UV and/or visible light configured to irradiate said at least one nanofunctionalised support is described.

A method of moderating concentration of at least highly fluorinated alkyl materials (e.g., molecules) from a contaminated aqueous feed liquid containing an original composition of between 5 parts/trillion and 3000 parts/billion of the at least highly fluorinated materials per liter of water into an aqueous electronic separator having multiple chambers including a feed chamber having a liquid exit port from which a mediated aqueous contaminated feed liquid exits and a liquid input port into which the contaminated aqueous feed liquid enters the feed chamber; an anodic electrode chamber filled with an aqueous anodic liquid; and a cathodic electrode chamber filled with an aqueous cathodic liquid; wherein the feed chamber is between and adjacent to the anodic electrode chamber and the cathodic electrode chamber and the feed chamber is separated from each of the anodic electrode chamber and the cathodic electrode chamber by at least one semipermeable membrane.