Provided is a composition for forming a separation membrane active layer, the composition comprising a compound of the following Chemical Formula 1 and a compound of the following Chemical Formula 2, wherein a percentage (a/b) of a weight (a) of the compound of Chemical Formula 1 to a weight (b) of the compound of Chemical Formula 2 is 30% to 60%, and a pH thereof is 11 to 12.7:

##STR00001## wherein in Chemical Formulae 1 and 2: R1 to R16 are each independently —CRR′— or —NR″—. at least two of R1 to R10 are —NR″—; at least two of R11 to R16 are —NR″—; and R, R′, and R″ are each independently hydrogen or a substituted or unsubstituted alkyl group; a method for producing a separation membrane; a separation membrane; and a water treatment module.

The present invention relates to high performance, crosslinked hollow-fibre membranes and a new process for manufacturing the same.

The present invention relates to a method of manufacturing a high-performance thin film composite (TFC) membrane through a solvent activation process. In the present invention, by using a mixed solvent of a good solvent and a poor solvent as an activating solvent, a conventional polysulfone-based support-based TFC membrane having high water permeance as well as excellent salt rejection may be manufactured.

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.

Disclosed are hollow fibers suitable for use in dialysis in an outside-in configuration. For such fibers, it is desirable that the fiber have a low albumin sieving coefficient and have a permeability high enough to be considered a High Flux dialyzer, and it is desirable that the outer (blood-facing) surface have a sufficiently small roughness and be hydrophilic. It is desirable that there be a selective layer on the outer surface and, interiorly of that, a porous structurally supportive region, which may contain elongated macrovoids. Such a fiber may be spun through a triple-concentric spinneret that produces a bore liquid surrounded by dope surrounded by a shower. The shower and the coagulation bath may be pure water, which is a non-solvent. The process may be performed at room temperature. Spinning parameters are discussed.

A low cost, high selectivity asymmetric polyimide/polyethersulfone (PES) blend hollow fiber membrane, a method of making the membrane and its use for a variety of liquid, gas, and vapor separations such as deep desulfurization of gasoline and diesel fuels, ethanol/water separations, pervaporation dehydration of aqueous/organic mixtures, CO.sub.2/CH.sub.4, CO.sub.2/N.sub.2, H.sub.2/CH.sub.4, He/CH.sub.4, O.sub.2/N.sub.2, H.sub.2S/CH.sub.4, olefin/paraffin, iso/normal paraffins separations, and other light gas mixture separations. The polyimide/PES blend hollow fiber membrane is fabricated from a blend of a polyimide polymer and PES and showed surprisingly unique gas separation property with higher selectivities than either the polyimide hollow fiber membrane without PES polymer or the PES hollow fiber membrane without PES polymer for gas separations such as for H.sub.2/CH.sub.4, He/CH.sub.4, H.sub.2S/CH.sub.4, CO.sub.2/CH.sub.4 separations.

The present invention relates to a fibre for purification of liquids comprising a matrix of polymer with organosilane impregnated therein and a method for preparing the same. The fibre of the present invention is capable of providing at least 2 log reduction of viruses, bacteria and cysts and flux of 10 to 1000 litre per square meter per hour at 2 psig.

The object of the present invention is to provide a porous membrane by which a useful component can be recovered while suppressing the clogging during filtration of a protein solution and from which only a small amount of an eluate is eluted even when an aqueous solution is filtered. The present invention provides a porous membrane containing a hydrophobic polymer and a water-insoluble hydrophilic polymer, the porous membrane having a dense layer in the downstream portion of filtration in the membrane, having a gradient asymmetric structure in which the average pore diameter of fine pores increases from the downstream portion of filtration toward the upstream portion of filtration, and having a gradient index of the average pore diameter from the dense layer to the coarse layer of 0.5 to 12.0.

An asymmetric hydrophobic polyolefin hollow fiber membrane includes a support layer and a separation layer, the separation layer including an outer surface, the outer surface including a quantity of first pores with a certain pore size; presence of the first pores facilitates an anesthetic gas such as sevoflurane and remifentanil to permeate through the hollow fiber membrane into the human blood, allowing for the patient to maintain sedated throughout a surgical process; meanwhile, the first pores facilitate reduction of dosage of the anesthetic in the surgery, thereby reducing surgical costs and avoid overdosage of the anesthetic causing secondary impairment to the patient; in addition, the hollow fiber membrane offers a long plasma permeation duration, a high tensile strength and a high elongation at break to satisfy application needs, particularly suitable for human blood oxygenation including anesthetic gas and the gas-liquid separation areas.

A process for preparing a porous film of a fluoropolymer, including the following steps: the provision of an ink including the fluoropolymer and a vehicle including a solvent for the fluoropolymer and a nonsolvent for the fluoropolymer, the solvent for the fluoropolymer and the nonsolvent for the fluoropolymer being mutually miscible; the deposition of the ink on a substrate; the evaporation of the vehicle comprising the solvent and the nonsolvent.