Embodiments of the present invention relate to a nanofiltration composite membrane for use to purify water, the methods for preparing said nanofiltration composite membranes and to the nanofiltration composite membranes prepared accordingly.

The present invention relates to a method for producing a polyelectrolyte complex (PEC) membrane having a predetermined porosity via salt dilution induced phase separation, in which a liquid polymer solution (P) containing polyanions (A) and polycations (C) dissolved in an aqueous medium at an overcritical salt concentration is exposed to an aqueous medium.

The disclosure provides certain porous membranes comprised of cyclic polyolefin polymers, such as poly(norbornene)s. In one embodiment, a poly(norbornene) polymer is dissolved in tetrahydrofuran, cast into a film and subjected to solvent induced phase separation to provide a porous filter membrane (i.e., film).

The present disclosure provides extruded or spun, semi-permeable, porous hollow fibres, comprising covalent ester, thioester and/or amide crosslinked polypeptides as well as processes for their production. The hollow fibres may be produced from protein, protein extracts, and/or protein isolates derived from plants, animals, bacteria, algae, archaea, and/or fungi, and in certain embodiments are intended to be suitable for human and/or animal ingestion. In some embodiments, the hollow fibres may be designed to be used in the production of cartridges that are compatible with existing and/or novel bioreactor platforms, for harbouring cell cultures in cultured meat production.

A method for preparing a durably hydrophilic and uniform-pore ultrafiltration membrane is disclosed herein. Chemical reactions between the functional groups and the active bonds of the molecular chains in the membrane materials are initiated perform the grafting of hydrophilic chains on the polymer chains under conventional dissolution conditions of the polymer membrane material (dissolution with synchronized hydrophilization), so as to realize durable hydrophilization of the membrane materials. The resulting hydrophilized polymer solution (a nascent-state membrane) is introduced into a coagulation bath to initiate a crosslinking reaction among the hydrophilic chains. The resulting crosslinking serves to synergistically regulate subsequent phase separation and membrane formation (phase separation under synergistic crosslinking).

A mixed matrix membrane that includes polyvinylidene fluoride and TiN nanoparticles may be useful solar-driven surface heating membrane distillation. The plasmonic character of the TiN nanoparticles may locally heat the membrane when exposed to sunlight, which increases the distillation flux across the membrane. Said distillation methods may be particularly useful for treating laundry wastewater to collect distilled water with a reduced concentration of chemical oxygen demand, a reduced concentration of total dissolved solids, and a reduce conductivity. The distilled water may be repurposed for a variety of purposes including agricultural irrigation with significant less impact on the aquatic ecosystem compared to the laundry wastewater.

The present disclosure relates to the research field of functionalized membrane materials and their preparation methods, in particular to a double-layer functionalized hollow fiber membrane and a preparation method thereof. The present disclosure provides a preparation method for a double-layer functionalized hollow fiber membrane, including preparation of the casting solutions, transverse extrusion casting solution, longitudinal stretching, the first coagulation bath, the second coagulation bath, and the third coagulation bath. The double-layer functionalized hollow fiber membrane prepared by the present disclosure has a double-functionalized layer structure with a dense cortical antibacterial layer and a macroporous structure adsorption layer. The double-layer functionalized hollow fiber membrane not only has the function of separation and purification, but also has the function of bacteriostasis and adsorption. The double-layer functionalized hollow fiber membrane has high strength, the wire is not easy to break, and it has a wide application field.

The present invention relates to a process for the production of asymmetric cellulose hollow fibres and the use of such fibres in the production of asymmetric carbon hollow fibre membranes (CHFMs). In particular, the present invention provides a facile and scalable process for the preparation of asymmetric CHFMs by direct pyrolysis of polymeric precursors without the need for complex pre-pyrolysis treatment steps to prevent pore collapse. The present invention also relates to the use of asymmetric CHFMs prepared according to said process in the separation of hydrogen gas from a mixed gas source, especially in the separation of hydrogen from CO.sub.2 in the steam-methane reforming reaction.

A virus removal membrane includes cellulose, and a primary-side surface through which the protein-containing solution is to be applied and a secondary-side surface from which a permeate that has permeated the virus removal membrane is to be flowed, wherein a bubble point is 0.5 MPa or more and 1.0 MPa or less; and when a solution containing gold colloids having a diameter of 30 nm is applied through the primary-side 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 of the spectrum of variation in the brightness is 0.01 or more and 0.30 or less.