In summary, the disclosure provides certain membranes useful as filter materials in the removal of metal ions, metal particulates, and/or organic contaminants from liquid compositions, in particular liquid compositions used in the microelectronic device industry. The membranes of the disclosure are porous membranes comprised of poly(quinoline) polymers. Advantageously, the poly(quinoline) membranes are thermally stable and hydrolytically stable and can thus be cleaned between uses using acidic material such as dilute hydrochloric acid, without suffering from significant degradation. The poly(quinoline) polymers can be designed to be soluble in certain solvents, thus enabling the manufacture of the corresponding porous membranes by immersion-casting techniques.

The present invention relates to a method for producing a porous monolayer polymer membrane, to a porous monolayer polymer membrane, and to the use of the polymer membrane for filtration.

A double-layered material consisting of a cellulose nanofibrous (CNF) layer and a graphene oxide (GO) nanolayer coating, wherein the material comprises 0.5-4 wt. % of GO, preferably 1-2 wt. % of GO, in relation to the total weight of the material is disclosed, as well as methods for producing said material, membranes comprising said material, and uses of said material and membranes Thus, the present invention provides a cellulose nanofiber material with a high flux, a good separation performance and a strong mechanical and structural stability in solution.

A sensor device includes a substrate, a sensing layer formed over the substrate, and a cover layer at least partially covering the sensing layer and protecting the sensing layer. The cover layer is a porous material or has a plurality of openings.

Water or wastewater filtration processes and systems have a plurality of membrane modules, each having filter media therein, the plurality of membrane modules arranged in parallel fluid flow, a main bottom feed conduit, a main top feed conduit, and separate feed conduits fluidly connecting the main bottom feed conduits and the main top feed conduits to respective membrane modules. A main filtrate conduit, and separate filtrate conduits fluidly connect respective membrane modules to the main filtrate conduit. A backwash conduit fluidly connects the main filtrate conduit to respective membrane modules through the main top and bottom feed conduits. A pump having a pump feed conduit and a pump discharge conduit, the pump discharge conduit fluidly connected to the main top and bottom feed conduits, and a plurality of automatically controllable valves positioned in the main top and bottom feed conduits, the main filtrate conduit, the pump discharge conduit, and the backwash conduit, with a controller configured to actuate the plurality of automatically controllable valves to control feed and backwash flows through the membrane modules using pressure developed only by the pump. The pump is preferably operated by a variable-speed prime mover.

A composite material is provided comprising a porous polymeric matrix having metal-organic framework (MOF) domains dispersed within the porous polymeric matrix, each of said MOF domains in fluid communication with the external environment through the pores in the porous polymeric matrix. A process of using the composite material to chemically modify or detoxify a chemical warfare agent or a toxic industrial chemical is also provided. The chemical warfare agent or the toxic industrial chemical is brought into contact with a MOF domain within the porous polymeric matrix so that the MOFs adsorb and chemically modify the chemical warfare agent or the toxic industrial chemical. A process for producing such a composite material is also disclosed.

A nanomembrane and a forming method thereof are provided. The nanomembrane according to embodiments of the present invention comprises an elastomer layer and nanostructures disposed on the elastomer layer. The method for forming a nanomembrane according to embodiments of the present invention comprises forming a nanocomposite solution comprising nanostructures and an elastomer solution, forming an elastomer solution layer by providing the nanocomposite solution on a first solvent, and forming an elastomer layer by drying the elastomer solution layer, and forming a nanomembrane comprising the elastomer layer and the nanostructures bonded to the elastomer layer. The nanocomposite solution is formed by mixing the nanostructures and the elastomer solution with a second solvent, and the elastomer solution is formed by mixing elastomer and a third solvent.

A filter material has a layer of porous material and a plurality of structures disposed on a surface of the layer, where each of the structures has a re-entrant geometry. The plurality of structures may be a plurality of ordered structures. A filter material may include a layer of porous material and a plurality of re-entrant structures disposed on a surface of the layer, each of the re-entrant structures including a stem and a cap, where the caps of adjacent structures are attached to each other to form a plurality of pores, where each pore is disposed between adjacent re-entrant structures.

A filter device includes one or more filter membranes, and a filter housing enclosing the one or more filter membranes. Each of the filter membranes includes a base membrane and a plurality of through holes.

Fabricating a zeolite membrane on a substrate includes disposing first zeolite crystals on a substrate to yield a first layer on the substrate and disposing second zeolite crystals on the first layer to yield a second layer on the first layer, thereby yielding a membrane precursor. The membrane precursor is heated at a first temperature for a first length of time, and the temperature of the membrane precursor is increased or decreased from the first temperature to a second temperature. The membrane precursor is heated at the second temperature for a second length of time to yield the zeolite membrane. The second zeolite crystals have a smaller average diameter than the first zeolite crystals. The second temperature can exceed the first temperature or the first temperature can exceed the second temperature.