Systems, devices and methods are provided for separating and/or isolating individual nanoparticles from groups or clusters of nanofibers within a gaseous medium. The system comprises a housing configured to contain the groups of nanofibers, and a pump coupled to the housing. The system further includes one or more passages coupled to the pump and a gaseous medium within the passages. The pump is configured to propel the nanofibers through, or with, the gaseous medium against one or more surface(s) within the passages at a sufficient velocity and/or momentum to open up or separate, the groups of nanofibers into individual nanoparticles. Isolating individual nanoparticles in a gaseous medium and then dispersing them into a substrate or a fluid stream to form a product allows the nanoparticles to be distributed more uniformly and “in depth” throughout the product.

Filter media and filters, such as air filters, face masks, gas turbine and compressor air intake filters, panel filters and the like, are provided that include high linear density fibers and nanoparticles dispersed throughout at least a portion of the filter media. A filter includes a filter media comprising a substrate of fibers having a linear density of greater than about 3 denier, and nanoparticles disposed within the substrate. The larger linear density fibers provide more open space or pores within the filter media, allowing for a greater density of nanoparticles to be dispersed therein. This improves the overall efficiency of the filter. The three-dimensional distribution of nanoparticles within the filter also provides resistance against complete blockage of a particular portion of the filter, thereby reducing the overall pressure drop across the filter.

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 μm or greater to 50.0 μm or less, and the outer diameter D2 is set to a value in a range of 30.0 nm or greater to 1.0 μm or less.

A replaceable air filter element has a multilayer filter medium panel configured for mounting on a reusable exoskeleton support frame. The exoskeleton support frame is installable on a flow face of the filter medium panel and is provided with U-shaped locking members configured to detachably engage with and mount the filter medium panel. The exoskeleton support frame is configured to be reused such that only the filter medium panel is replaced, thereby reducing the environmental waste and making for a “green” eco-friendly air filter element.

Disclosed is a method and device for inactivating or killing airborne bacteria, fungi, molds and viruses by passing the air through a filter material formed of a fabric having particles of zinc disposed in discrete physically isolated locations, wherein the particles of zinc and oxygen from the air form half cells of a battery whereby to create an electrical field that inactivates or kills airborne bacteria, fungi, molds and viruses passing through the filter material.

A cartridge for applying an electromagnetic field (EMF) to at least one toxin in a wound in the skin of a person or animal is provided. The cartridge includes a power supply, a controller coupled to the power supply and providing a voltage between about 0.2V and 3V to an array of electrodes configured to transmit the EMF to the skin about the wound site. A cartridge for applying an ultrasonic field to at least one toxin in a wound in the skin of a person or animal is also provided. The ultrasonic cartridge may include a power supply, a controller coupled to the power supply and providing a voltage to at least one sonotrodes configured to transmit the ultrasonic field to the skin about the wound. The cartridge may also include a sensor for measuring the resistance or impedance in the tissue to be treated and the controller can adjust the ultrasonic field based on the impedance or resistance.

Nanomaterials (100) in particular HEPA air filter media. One embodiment is a nanomaterial (100) that includes a plurality of nanofibers (140) that form a randomly interwoven network defining three-dimensional pores (160) therein. The nanomaterial further includes a plurality of beads (120) with a bead diameter of 2-20 m that are distributed randomly within the plurality of nanofibers (140). The beads (120) support the nanofibers (140) to prevent the pores (160) from collapsing.

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.

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 filter medium is provided with a first filter layer that retains particles and a second filter layer provided with an antimicrobial material and an anti-allergenic material. The anti-allergenic material contains polyphenols. The filter medium is designed particularly for filtering air for the passenger compartment of motor vehicles.