Devices and methods are provided that permit efficient and selective separation of liquid biological specimens into at least two constituent components to facilitate subsequent quantitative and qualitative analysis on at least one analyte of interest in at least one of the components. The devices generally include one or more sample deposition regions supported on a base. Each sample deposition region includes a separation membrane for separating the liquid biological specimen into two different fractions. The first fraction is trapped by the separation membrane while the second fraction passes through the separation membrane and into a respective collection membrane. The separation and collection membranes are easily separable from the devices and can be utilized for further processing and analysis.

A mesoporous isoporous asymmetric material includes at least one diblock or multiblock copolymer, wherein the material has a transition layer having a thickness of at least 300 nm and a low macrovoid density, and the material has a sub-structure adjacent to said transition layer and said sub-structure comprises a high macrovoid density. A method for producing mesoporous isoporous asymmetric materials having macrovoids can include: dissolving at least one diblock or multiblock copolymer in a solution, the solution having one or more solvents and one or more nonsolvents, to form a polymer solution; dispensing the polymer solution onto a substrate or mold, or through a die or template; removing at least a portion of solvent and/or nonsolvent from the polymer solution to form a concentrated polymer solution; and exposing the concentrated polymer solution to a nonsolvent causing precipitation of at (least a portion of the polymer from the concentrated polymer solution.

Embodiments of the present disclosure describe a method of making a membrane comprising contacting one or more membrane materials, a solvent, and a non-solvent at a first temperature sufficient to form a homogenous solution; casting the homogenous solution at about the first temperature; and adjusting the temperature to a second temperature sufficient to induce phase separation of the solvent and non-solvent and form a porous membrane.

A manufacturing method for an acidic gas separation membrane sheet includes: a step of preparing a hydrophilic resin composition liquid for forming a hydrophilic resin composition layer; a step of removing bubbles contained in the hydrophilic resin composition liquid; a step of applying the hydrophilic resin composition liquid onto a first porous layer to form an applied layer on the first porous layer; and a step of laminating a second porous layer on the applied layer to form a laminated body. The step of removing bubbles includes: a step of applying a shear to the hydrophilic resin composition liquid; and a step of leaving the hydrophilic resin composition liquid.

A support is a porous ceramic support for supporting a zeolite membrane. The hydraulic conductivity of the support is less than or equal to 1.110.sup.3 m/s. In the support, the total content of alkali metal and alkaline earth metal in a surface part within 30 m from a surface in a depth direction perpendicular to the surface is less than or equal to 1% by weight.

A separation membrane sheet that causes a specific fluid component to selectively permeate therethrough, comprises: a first porous layer; and a resin composition layer formed on the first porous layer. The resin composition layer has a filtration residue fraction of greater than or equal to 20% and less than or equal to 90%; and contains a resin having an ionic group or a salt thereof, and has an ion exchange capacity of greater than or equal to 1 millimole equivalent per 1 g of a dry resin in a filtration residue.

A novel fibrous membrane comprises at least one substrate layer comprising at least 80% by weight of microfibers that carry positively charged and/or negatively charged functional groups, and at least one layer of filtration material attached to the substrate layer, wherein the layer of filtration material comprises at least 80% by weight of nanofibers that carry negatively charged and/or positively charged functional groups. The fibrous membrane is able to remove or reduce the concentration of bacteria, viruses and heavy metals while maintaining relatively high water flow. A filter comprising the fibrous membrane and a method for manufacturing the fibrous membrane are also provided.

A zeolite membrane complex includes a porous support, and a zeolite membrane formed on the support. The zeolite membrane includes a zeolite crystal phase constituted by a plurality of zeolite crystals, and a dense grain boundary phase, which is a region between the plurality of zeolite crystals. A density of at least part of the grain boundary phase is smaller than a density of the zeolite crystal phase. A width of the grain boundary phase is 2 nm or more and 10 nm or less. Accordingly, it is possible to realize high permeability and high separating performance, and high durability of the zeolite membrane.

A separation membrane for selectively separating (e.g., pervaporating) a first fluid (e.g., a first liquid) from a mixture comprising the first fluid (e.g., first liquid) and a second fluid (e.g., second liquid), wherein the separation membrane includes a polymeric ionomer that has a highly fluorinated backbone and recurring pendant groups according to the following formula (Formula I): OR.sub.f[SO.sub.2N.sup.(Z.sup.+)SO.sub.2R].sub.m[SO.sub.2].sub.n-Q wherein: R.sub.f is a perfluorinated organic linking group; R is an organic linking group; Z.sup.+ is H.sup.+, a monovalent cation, or a multivalent cation; Q is H, F, NH, O-2 Y+, or C.sub.xF.sub.2x+1; Y.sup.+ is H.sup.+, a monovalent cation, or a multivalent cation; x=1 to 4; m=0 to 6; and n=0 or 1; with the proviso that at least one of m or n must be non-zero.

A filtering device is used for obtaining a chemical liquid by purifying a liquid to be purified and includes an inlet portion, an outlet portion, a filter A, at least one filter B different from the filter A, and a flow path that includes the filter A and the filter B arranged in series and extends from the inlet portion to the outlet portion. The filter A has a porous membrane made of ultra-high-molecular-weight polyethylene and a resin layer disposed to cover at least a portion of the surface of the porous membrane, and the resin layer includes a resin having a neutral group or an ion exchange group.