A filtration barrier comprises at least one barrier layer which includes polymeric nanofibers interlaced with microfibers, and at least one substrate layer which includes polymeric microfibers. The filtration barrier can be made by electrospinning process.

There is provided a nanofibrous filter comprising a substrate and self-assembled nanofibers deposited on the substrate. The self-assembled nanofibers comprise -conjugated molecules self-assembled by non-covalent interactions, wherein the -conjugated molecules are phthalocyanine derivative molecules or diketopyrrolopyrrole derivative molecules. There is also provided a method of preparing the nanofibrous filter.

A filtration barrier comprises at least one barrier layer which includes polymeric nanofibers interlaced with microfibers, and at least one substrate layer which includes polymeric microfibers. The filtration barrier can be made by electrospinning process.

An improved catalytic filter material for use in removing target species found in a fluid stream is provided. The filter material includes water wettable, high temperature staple fibers in the form of porous substrates that are attached to a high temperature fluoropolymer woven scrim. The porous substrates have catalyst particles adhered (e.g., tethered) to the surfaces thereof by a polymer adhesive. Optionally, at least one microporous layer is positioned adjacent to or within the filter material.

A filtration barrier comprises at least one barrier layer which includes polymeric nanofibers interlaced with microfibers, and at least one substrate layer which includes polymeric microfibers. The filtration barrier can be made by electrospinning process.

A fiber article includes a plurality of first fibers and a plurality of second fibers each having an outer diameter smaller than that of each of the first fibers, the plurality of second fibers being supported in a dispersed state by the first fibers. A ratio D1/D2 of an outer diameter D1 of the first fiber to an outer diameter D2 of the second fiber is set to a value in a range of 15.0 or greater to 1666.7 or less. The outer diameter D1 is set to a value in a range of 5.0 ?m or greater to 50.0 ?m or less, and the outer diameter D2 is set to a value in a range of 30.0 nm or greater to 1.0 ?m or less.

Filter media comprising surface-treated fiber webs having one or more advantageous physical properties are generally described. Certain improvements in the surface-treated fiber webs described herein may be realized in filter media comprising adsorbent particles. The improvements herein are, in some embodiments, related to favorable distributions of cavities in surface-treated fiber webs, such as those used in backers of the filter media.

Systems, devices and methods are provided for producing a product comprising a filter media, such as a gas or liquid filter. A feed system for conveying nanoparticles comprises a container for receiving clusters of nanoparticles and one or more vibration elements coupled to the container and configured to pulse the clusters of nanoparticles to convey the clusters of nanoparticles through the container. The feed system further comprises one or more components for converting the clusters of nanoparticles into a group of nanoparticles having a smaller mass or volume than the cluster of nanoparticles. The system both conveys and breaks down the clusters of nanoparticles, allowing them to be transported from the bulk bin to the filter manufacturing apparatus to form a filter media with improved quality and yield and reduced cost and time. In addition, the system is scalable and produces filter media with less variation.

A cooking oil degradation suppression filter that can effectively and easily suppress degradation of cooking oil without using a filter aid or the like and can prevent a decrease in the taste of food caused by separation of a degradation suppression agent. The cooking oil degradation suppression filter includes fiber (10) and at least one degradation suppression agent (13) selected from a carbonate, a silicate, a tartrate, an oxide, a hydroxide, an alginate, and a phosphate.

A filtration barrier comprises at least one barrier layer which includes polymeric nanofibers interlaced with microfibers, and at least one substrate layer which includes polymeric microfibers. The filtration barrier can be made by electrospinning process.