Mass Production of Electrospun Polyimide Nanofiber Membranes for Application in Li-Ion Battery, and Air and Liquid Fine Filtration

摘要

Elctrospun nanofibers has been attracting worldwide intensive attention due to its small diameter, high specific area, particularly, being made in an easy way. The electrospun nanofiber nonwovens or self-supporting electrospun nanofiber mats have, however, not been produced in a large scale. In this presentation, we introduce a way to the mass production of electrospun polyimide nanofiber nonwovens by using needled electrospinning nozzle array modules. The production speed of nanofiber nonwovens can reach 2-3 m~2 nanofiber nonwovens with a surface density of 10-15 g/m~2 per minute. The as-produced nanofiber products could be thermally treated to form the nanofiber nonwovens with an as-desired porosity or density for the battery separator application, and for air purification and liquid filtration applications.