Dual-layer gas filters and systems and methods for making the same

A method for manufacturing a filter media, the method comprising:

• providing first and second layers each comprising fibers;
• isolating individual nanoparticles in a gaseous medium;
• dispersing the individual nanoparticles from the gaseous medium into a first surface of the first layer such that the individual nanoparticles penetrate through at least the first surface of the first layer;
• and
• bonding the first layer to the second layer to form a filter media.

A system for manufacturing a filter media, the system comprising:

• a feeder for advancing a first layer of fibers from an upstream end to a downstream end;
• a fiberization device for isolating individual nanoparticles;
• a dispersion device between the upstream and downstream ends of the feeder for dispersing the individual nanoparticles into a first surface of the first layer such that the nanoparticles penetrate through at least the first surface of the first layer;
• and
• a device for bonding the first layer to a second layer of fibers.