A single piece-type bipolar film roll with a mesh cloth support and a manufacturing method therefor. The single piece-type bipolar film roll is supported by a high-strength ultra-high molecular weight polyethylene mesh cloth, one side of the single piece-type bipolar film roll is a cation exchange layer containing a benzenesulfonic acid group, the other side of the single piece-type bipolar roll is an anion exchange layer containing a benzyl dimethyl butyl ammonium quaternary amino group, and the middle is a water dissociation catalyst layer containing a benzyl methyl butyl amine tertiary amino group, and the three layers form the single piece-type bipolar film roll. By providing a wider protective film and a narrower spacing film, a dipping and absorbing film roll is polymerized to prepare a composite base film roll which is then subjected to continuous sulfonation to prepare a single-sided sulfonated composite positive film roll, and then the unreacted blank side is sequentially subjected to three-step chemical reactions such as complete chloromethylation, complete tertiary amination and incomplete methylation, so as to prepare a single piece-type bipolar film roll having a compact structure, a clear middle interface, a high mechanical strength and a stable quaternary amino group, and the product qualification rate is high; and the single piece-type bipolar film roll is suitable for a bipolar film electrodialysis engineering application of an organic material-containing system.

The disclosure of the present invention relates to a method for preparing membrane and associated membrane and filter element. The method comprises providing a porous substrate having a plurality of pores; and applying a pre-filler solution to at least partially occupy the pores in the porous substrate. The membrane comprises a porous substrate and a filter layer formed on the porous substrate. The filter element comprises a core tube; and a membrane as prepared and rolled around the core tube.

A superhydrophobic polypropylene porous film, including a polypropylene porous film substrate, titanium dioxide layers and a surface modifier layer, is disclosed. The titanium dioxide layers are deposited on the surface of the polypropylene porous film substrate by atomic deposition technology; a surface modifier is coated on the titanium dioxide layers; hydrophobic bonds are formed between the titanium dioxide layers and the surface modifier layer; the superhydrophobic polypropylene porous film has a water contact angle greater than 150 degrees, a rolling angle less than 10 degrees, an aperture of 0.1-0.4 μm, a porosity of 50%-80%, a tensile strength of 30-50 MPa, and an elongation at break of 10%-30%. The superhydrophobic polypropylene porous film maintains the chemical resistance, rigidity, and porosity of the polypropylene porous film, and has superhydrophobic properties and a good separation effect after working for 80 hours, thus greatly increasing the service life, and reducing operation costs and working costs in a membrane distillation process.

Methods of fabricating a membrane comprising proteoliposomes having protein water channels are provided herein. The method may include providing a porous substrate, depositing a solution containing proteoliposomes on the porous substrate, and then contacting the porous substrate with an aqueous monomer solution and an organic monomer solution to form a selective layer on the porous substrate embedding the proteoliposomes. The method may include depositing the aqueous monomer solution, then the solution containing the proteoliposomes, then the organic monomer solution, to form the selective layer. The present disclosure also describes the membrane and a system operable to accommodate both methods.

A superhydrophobic polypropylene porous film, including a polypropylene porous film substrate, titanium dioxide layers and a surface modifier layer, is disclosed. The titanium dioxide layers are deposited on the surface of the polypropylene porous film substrate by atomic deposition technology; a surface modifier is coated on the titanium dioxide layers; hydrophobic bonds are formed between the titanium dioxide layers and the surface modifier layer; the superhydrophobic polypropylene porous film has a water contact angle greater than 150 degrees, a rolling angle less than 10 degrees, an aperture of 0.1-0.4 μm, a porosity of 50%-80%, a tensile strength of 30-50 MPa, and an elongation at break of 10%-30%. The superhydrophobic polypropylene porous film maintains the chemical resistance, rigidity, and porosity of the polypropylene porous film, and has superhydrophobic properties and a good separation effect after working for 80 hours, thus greatly increasing the service life, and reducing operation costs and working costs in a membrane distillation process.

Described herein are filtration membranes and related, compositions, methods and systems and in particular filtration membranes with embedded polymeric micro/nanoparticles and related compositions, methods, and systems.

A method of making a polymer membrane, the method including providing a first monomer solution having a first solvent, a second monomer solution having a second solvent, and a substrate having a surface, and including electrospraying the first monomer solution onto the substrate surface and electrospraying the second monomer solution onto the substrate surface to form the polymer membrane on at least a portion of the substrate surface.

A membrane sorbent is described, which comprises 1-6 wt % silicon carbide nanoparticles dispersed in a polymer matrix. The polymer matrix may comprise polysulfone and polyvinylpyrrolidone. The membrane sorbent is used for separating oil from a contaminated water mixture. The silicon carbide nanoparticles of the membrane sorbent may be made from rice husk ash.

Disclosed herein is a method for producing low thermal conductivity fibers for manufacturing low thermal conductivity textiles, in accordance with some embodiments. Accordingly, the method may include a step of grinding manganese oxide into manganese oxide particles of a particle size ranging from 20 (nanometers) to 600 (nanometers). Further, the method may include a step of mixing the manganese oxide particles with an applicable substance for creating a masterbatch based on the grinding. Further, the masterbatch may include the manganese oxide particles in an amount ranging from 0.25% to 20% by weight of the masterbatch. Further, the method may include a step of applying the masterbatch to hollow fibers of a polymer based on the mixing. Further, the method may include a step of producing low thermal conductivity fibers based on the applying. Further, the low thermal conductivity textiles may be manufactured using the low thermal conductivity fibers.

A composite membrane including carbide-derived carbon (CDC) particles deposited onto a surface of an intermediate layer which is supported on a porous polysulfone substrate. The intermediate layer contains reacted units of a polyfunctional acyl halide (e.g. trimesoyl chloride) and polydopamine. Methods of making the composite membrane via techniques such as filtration-assisted deposition of CDC particles and interfacial polymerization are specified. Water flux and oil rejection (e.g. diesel) performances of the composite membrane are evaluated. A method of separating an organic compound, such as hydrocarbons, from an aqueous sample utilizing the membrane is also provided.