The invention pertains to a polyaryl ether sulfone polymer solution [solution (SP)] comprising: at least one sulfone polymer [polymer (PSI)] having recurring units, wherein more than 50% moles, with respect to all the recurring units of polymer (PSI), are recurring units (R.sub.PSI) selected from the group consisting of those of formulae (R.sub.PSI-1) and (R.sub.PSI-2) herein below: (R.sub.PSI-1) (R.sub.PSI-2) wherein: each of E, equal to or different from each other and at each occurrence, is selected from the group consisting of those of formulae (E-1) to (E-3): (E-I) (E-II) (E-III) each R is independently selected from the group consisting of halogen, alkyl, alkenyl, alkynyl, aryl, ether, thioether, carboxylic acid, ester, amide, imide, alkali or alkaline earth metal sulfonate, alkyl sulfonate, alkali or alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium; and j is zero or an integer of 1 to 4; is a bond or a divalent group optionally comprising one or more than one heteroatom; preferably T is selected from the group consisting of a bond, CH.sub.2, C(O), C(CH.sub.3).sub.2, C(CF.sub.3).sub.2, C(?CCI.sub.2), C(CH.sub.3)(CH.sub.2CH.sub.2COOH), and a group of formula: (A) at least one polar organic solvent [solvent (S)]; and at least one mixture of polyhydroxyl aliphatic alcohols having from 1 to 6 carbon atoms or derivatives thereof [mixture (PHA)], said mixture (PHA) comprising at least one ethylene glycol compound [compound (EthyGly)] and at least one glycerol compound [compound (Gly)], to its use for manufacturing membranes, and to membranes obtained therefrom.

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The present invention provides a RO membrane or a FO membrane comprising a coating layer made of a phospholipid bilayer membrane and formed on a surface of a porous membrane body, having a high water permeate flow rate and salt rejection performance, the membrane being a permselective membrane comprising a porous membrane having a pore size of 5 nm to 50 nm and a coating layer made of a phospholipid bilayer and formed on a surface of the porous membrane, wherein (i) the phospholipid bilayer comprises phospholipid, amphotericin B, and ergosterol; (ii) a content of the amphotericin B is 3 to 20 mol % based on the phospholipid bilayer; (iii) a total content of the ergosterol and the amphotericin B in the phospholipid bilayer is 10 to 30 mol %.

The present invention pertains to a fluoropolymer-based porous membrane, to a process for manufacturing said porous membrane and to use of said porous membrane as filtration membrane for liquid and/or gas phases, in particular water-based phases.

The present invention deals with a method for obtaining membranes in the form of hollow fibers with application in the field of carbon dioxide removal from natural gas. The aforementioned membranes are obtained by means of heat treatment of polymeric membranes. In this method, polymeric membranes are obtained by a phase-inversion technique by immersion-precipitation and are subsequently subjected to a heat treatment, that is, that the membranes effectively become precursor membranes of the heat treatment. The heat treatment process involves the optimization of the heating rate, temperature, and stabilization time variables, aiming at the improvement of the transport properties of the polymeric membranes. After the heat treatment, it becomes possible to use the membranes in separation processes of gases which operate at pressures greater than 30 bar, with selectivity for carbon dioxide (CO.sub.2).

The present disclosure relates to synthesis of porous polymer networks and applications of such materials.

The present invention provides a method for the preparation of an asymmetric membranes. More particularly, the new method relates to the use of a crosslinker contacted via vapour or liquid phase with the surface layer of a cast polymer film, followed by the immersion of said film in a coagulation bath. The formation of a crosslinked skin layer and the solidification of the membrane bulk can thus be decoupled in time.

Asymmetric membranes in hollow fiber and flat sheet forms are disclosed herewith. The process of preparation of the membranes is further disclosed. The membranes are characterized and find application in the separation of gases and solutes.

Novel PBI films which may be used in electrochemical cells, such as redox flow batteries, are disclosed. Additionally, disclosed herein are membranes which comprise the novel PBI films which may be free from an organic solvent, and have a tensile strength at break of at least 25 MPa after drying.

The invention disclosed herein generally relates to matrices comprising polymers and methods for preparing them.

A virus removal membrane is formed from cellulose, in which, when a solution containing gold colloids having a diameter of 20 nm is applied through a primary surface to the virus removal membrane to allow the virus removal membrane to capture the gold colloids for measurement of brightness in a cross section of the virus removal membrane, a value obtained by dividing a standard deviation of a value of an area of a spectrum of variation in the brightness by an average of the value of the area is 0.01 or more and 1.5 or less; and a thickness of a portion, where gold colloids having a diameter of 20 nm or more and 30 nm or less are captured, in the cross section of the virus removal membrane in a wet state is 10.0 m or more and 30.0 m or less.