Nano material including nano fibers and beads for HEPA air filter media

The invention relates to a nanometer material, in particular, an HEPA air filter media. One embodiment is a nano material that includes a plurality of nano fibers that form a random interwoven networkin which three-dimensional voids are defined. The nano material further includes a plurality of beads having a bead diameter of 2 to 20 [mu]m, the beads randomly distributed within the plurality of nano fibers. The beads support the nano fibers to prevent the voids from collapsing. 本发明涉及纳米材料，特别是HEPA空气过滤介质。一个实施例是包括多个纳米纤维的纳米材料，所述纳米纤维形成在其中限定三维孔隙的随机交织网络。所述纳米材料进一步包括多个珠粒直径为2至20μm的珠粒，所述珠粒随机分布在所述多个纳米纤维内。所述珠粒支撑所述纳米纤维以防止所述孔隙塌陷。