Devices and methods suitable for cell separation. The devices herein include non-random voids interconnected through non-random pores and/or non-random solid geometrical structures optionally connected through solid non-random interconnecting elements. Such devices are preferably suitable for affinity-based cell isolation techniques which rely upon binding interactions.

A polymer matrix composite comprising a porous polymeric network; and a plurality of functional particles distributed within the polymeric network structure, and wherein the polymer matrix composite has an air flow resistance at 25° C., as measured by the “Air Flow Resistance Test,” of less than 300 seconds/50 cm.sup.3/500 micrometers; and wherein the polymer matrix composite has a density of at least 0.3 g/cm.sup.3; and methods for making the same. The polymer matrix composites are useful, for example, as filters.

An apparatus and methods are provided for an air filter precleaner for an open air filter box. The air filter precleaner includes a filter medium between a base and a grating that are fastened over an opening into an interior of the air filter box. The filter medium comprises a sheet of filter material having a shape and a size suitable for being supported between the base and the grating. The base is a rigid member that supports the filter medium in a sheet configuration, such that the airstream passes through the filter medium before entering the air filter box. The grating is a rigid member comprising a screen portion surrounded by a frame that is configured to be fastened onto the air filter box. The screen portion comprises a shaped lattice that allows the airstream to pass through the filter medium before entering the air filter box.

A method for producing a porous copolymer monolith substrate for use in flow through liquid chromatography applications is disclosed. The method comprises forming a reaction composition comprising at least one monoethylenically unsaturated aryl monomer, at least one polyethylenically unsaturated aryl monomer, a RAFT agent, at least one liquid porogen, and a radical initiator. The reaction composition is introduced to a mold having a shape and dimensions suitable for forming a liquid chromatography substrate. The monoethylenically unsaturated aryl monomer, the polyethylenically unsaturated aryl monomer and the RAFT agent are copolymerised in the mold under conditions to form a solid copolymer network that is phase-separated from the reaction composition and/or any liquid components.

A pourer for pouring a liquid from a bottle having a solid main body; a flow channel at the main body; a check valve at the flow channel; an air-vent channel at the main body; and a filter at the air-vent channel. The flow channel and the check valve are configured for allowing via the same a flow of the liquid from inside the bottle towards outside the bottle under the action of gravity when the bottle is turned to a pouring position for pouring the liquid; the air-vent channel is configured for allowing air from outside the bottle to pass inside the bottle via the air-vent channel during the flow of the liquid; and the filter is configured for producing a filtration of the air when the latter passes from outside the bottle to inside the bottle via the air-vent channel. Also, a product includes the pourer.

The electret-treated sheet includes: a core layer (A) which is a porous film containing at least a thermoplastic resin; a surface layer (X) disposed on one side of the core layer (A); and a back surface layer (Y) disposed on the other side of the core layer (A), the surface layer (X) and the back surface layer (Y) each having a charged outermost surface, wherein the electret-treated sheet has a water vapor permeability coefficient of 0.1 to 2.5 g.Math.mm/m.sup.2.Math.24 hr; the core layer (A) has a pore aspect ratio of 5 to 50 and an average pore height of 2.5 to 15 μm; the surface layer (X) and the back surface layer (Y) each have a thickness of 5 to 200 μm; and the surface layer (X) includes a heat seal layer (B) including the outermost surface, wherein the heat seal layer (B) has a melting point of 50 to 140° C.

Provided herein are electret-MOF filter embedded with particles derived from metal-organic frameworks (MOF) and their methods of manufacturing. The methods of manufacturing the electret-MOF filter can include suspending MOF particles in a solvent to form a MOF particle mixture, contacting a charged polymeric fibrous web with the MOF particle mixture, and coating the charged polymeric fibrous web with the MOF particles by flowing the MOF particle mixture through an inverse side of the polymeric fibrous web. The disclosed coating method can deposit MOF particles uniformly, without formation of films at interstitial spaces between fibers. The electret-MOF filter can simultaneously remove fine particulate matters (PMs) and hazardous gaseous pollutants (including volatile organic compounds (VOCs)) with high particle holding and gas adsorption capacities, and with very low air resistance.

An apparatus and a method are provided for a heating, ventilation, and air conditioning (HVAC) home air filter to remove airborne molecular contaminants and volatile organic compounds (VOCs) from air within residential spaces. The HVAC home air filter includes a supportive frame having a shape and size suitable to orient the HVAC home air filter within a residential HVAC system. A filter medium is retained within the supportive frame to remove the airborne molecular contaminants and VOCs from air flowing through the residential HVAC system. The filter medium includes a combination of media layers configured to exhibit a relatively high filtration efficiency and a low air pressure drop across the filter medium. The supportive frame includes a plurality of elongate sections and corner sections disposed along perimeter edges of the filter medium to support the filter medium within the residential HVAC system so as direct air through the filter medium.

A thin-film filter includes thin-film part having a film surface and a rear film surface arranged at the rear side of the film surface, a plurality of through holes, being formed to penetrate the thin-film part from the film surface to the rear film surface, the through holes are formed along by a slanting direction being made an acute angle or an obtuse angle with the film surface, and stripes-formed inner wall surfaces. The stripes-formed inner wall surfaces include stripe-like parts formed along by the slanting direction. The stripes-formed inner wall surfaces are formed inside the respective through holes.

A kitchen appliance has a compressible filter media block for removing odor-causing contaminants from cooking fumes. The sintered-fiber media exhibits low pressure drop and high flow rate. Embedded sorbent particles are adhered to the media block, preferably via sintering, thus leaving a substantial proportion of adsorbent surface area exposed for filtration purposes. The media block can be elastic or viscoelastic making it useful in retrofit applications for use in filtration circuits not originally designed to accommodate a filter. In preferred embodiments, the media block is composed of sintered plastic fibers wherein the sorbent particles are adhered thereto via sintering.