▎ 摘　　要

NOVELTY - Fibrous sheet (100) comprises a mat (110) of fibers, where the fibers comprise a polymer matrix and micro or nano particles. USE - The fibrous sheet is used as part of a medical device e.g. covered stents, vascular grafts, wound dressings, pledgets, filters, and personal protective equipment includes drapes, shields, masks, and respirators, filters for air and water, separation membranes for batteries and fuel cells. ADVANTAGE - The fibrous sheet is economical. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: fibrous sheet, comprising mat of fibers, where the fibers comprise a polymer matrix and many carbon material particles; and forming a fibrous sheet, comprising obtaining a polymeric mixture comprising a polymer and micro or nano particles, extruding the polymeric mixture to form a fibrous mat comprising fibers, and sintering the fibrous mat.