A nanofiber membrane includes a polymer nanofiber; and an amphiphilic triblock copolymer bonded to the surface of the polymer nanofiber, the amphiphilic triblock copolymer includes a hydrophobic portion; hydrophilic portions positioned at both ends of the hydrophobic portion; and a low surface energy portion positioned at one end of each of the hydrophilic portions positioned at both ends of the hydrophobic portion, and the hydrophobic portion of the amphiphilic triblock copolymer is bonded to the surface of the polymer nanofiber and the hydrophilic portion and the low surface energy portion are exposed to the outside of the surface of the polymer nanofiber. The membrane simultaneously exhibits hydrophilicity, underwater oleophobicity, and low oil adhesion force, thus has surface segregation properties, and as a result, has an excellent oil permeate flux, exhibits antifouling properties, and can excellently separate oil in water.

The present invention relates to a membrane for purifying a biological fluid, comprising at least one poly(aryl ether sulfone) (PAES) polymer based on one specific dihydroxy monomer. The present invention also relates to a purification method for a biological fluid comprising at least a filtration step through this membrane, as well as to the polymer solution for preparing such membrane, comprising this PAES.

The present invention relates to a membrane for purifying a biological fluid, comprising at least one poly(aryl ether sulfone) (PAES) polymer based on one specific dihydroxy monomer. The present invention also relates to a purification method for a biological fluid comprising at least a filtration step through this membrane, as well as to the polymer solution for preparing such membrane, comprising this PAES.

Provided is a high permeance nanofiltration membrane with nanoring-like structure and preparation method thereof. The membrane includes a base film and a polyamide layer having nanoring-like structure morphology on its surface. The method includes: (1) formulating a piperazine nanoemulsion containing a surfactant, vegetable oil, piperazine and water; and (2) infiltrating a base film with the piperazine nanoemulsion, and removing excess droplets from the surface of the base film to obtain a treated base film; covering the surface of the treated base film with a solution of trimesoyl chloride in n-hexane to perform interfacial polymerization; and drying the resulting membrane. Introduction of nano-oil droplets into aqueous phase as templates to construct nanoring-like structure morphology on the surface of the polyamide layer significantly increases the specific surface area and free volume of the polyamide layer without losing the salt rejection rate of the membrane, thereby greatly improving its water permeance.

Provided is a high permeance nanofiltration membrane with nanoring-like structure and preparation method thereof. The membrane includes a base film and a polyamide layer having nanoring-like structure morphology on its surface. The method includes: (1) formulating a piperazine nanoemulsion containing a surfactant, vegetable oil, piperazine and water; and (2) infiltrating a base film with the piperazine nanoemulsion, and removing excess droplets from the surface of the base film to obtain a treated base film; covering the surface of the treated base film with a solution of trimesoyl chloride in n-hexane to perform interfacial polymerization; and drying the resulting membrane. Introduction of nano-oil droplets into aqueous phase as templates to construct nanoring-like structure morphology on the surface of the polyamide layer significantly increases the specific surface area and free volume of the polyamide layer without losing the salt rejection rate of the membrane, thereby greatly improving its water permeance.

A sterile solution product bag includes sterilization grade filter integrated directly into the product bag such that microbial and particulate matter filtration can be performed using the filter directly at the point of fill. The filter can include a hollow fiber filter membrane contained in a stem connected to a bladder of the product bag.

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.2—COOH)—, 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. ##STR00001##

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.2—COOH)—, 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. ##STR00001##

The present disclosure relates to, inter alia, a modified surface comprising an optically active monomer, a polymeric material having a surface onto which the optically active monomer is covalently bound. In one aspect, a membrane comprising an optically active monomer, a poly(aryl sulfone) membrane having a surface onto which the optically active monomer is covalently bound. The present disclosure also relates to a method of modifying a surface, the method comprising applying sufficient energy to a surface to induce covalent bonding with an optically active monomer, and contacting the optically active monomer with the surface. In one aspect, a method of modifying a surface of a poly(aryl sulfone) membrane is disclosed. In another aspect, a method of synthesizing an optically active monomer is disclosed. In one aspect, a method of filtration of chiral compounds is disclosed.

The present disclosure relates to, inter alia, a modified surface comprising an optically active monomer, a polymeric material having a surface onto which the optically active monomer is covalently bound. In one aspect, a membrane comprising an optically active monomer, a poly(aryl sulfone) membrane having a surface onto which the optically active monomer is covalently bound. The present disclosure also relates to a method of modifying a surface, the method comprising applying sufficient energy to a surface to induce covalent bonding with an optically active monomer, and contacting the optically active monomer with the surface. In one aspect, a method of modifying a surface of a poly(aryl sulfone) membrane is disclosed. In another aspect, a method of synthesizing an optically active monomer is disclosed. In one aspect, a method of filtration of chiral compounds is disclosed.