ULTRA LIGHTWEIGHT MATERIALS FOR BIO INSPIRED MICROSYSTEMS

摘要

Ultra lightweight nanofiber fabrics play a vital role in the development of Microsystems. Polyacrylonitrile, polybenzimidazole and Nylon-66 polymer based ultra lightweight nanofiber fabrics were produced using electrospinning technique. SEM characterization showed that the diameter of Nylon-66 nanofibers varied from 50-300 nm. The average modulus and strength of Nylon-66 nanofiber fabric was 2.4 GPa and 154 MPa respectively. An attempt to build dragonfly's wing using carbon fiber as grid and electrospun fabric as skin was made. Three types of phenomenological dragonfly wings such as carbon fiber grid, electrospun Nylon-66 nanofiber fabric bonded-carbon fiber grid and commercial Nylon-6 film bonded-carbon fiber grid were made. The flexural stiffness to weight ratio of electrospun Nylon-66 fabric bonded-wing was 160% higher than that of commercial Nylon-6 film bonded-wing. This shows the potential application of ultra lightweight electrospun nanofiber fabric for building Microsystems.