| 摘要 |
PURPOSE: A polyimide porous nanofiber web and a method for fabricating the same are provided to ensure high melting point and to ensure chemical resistance and thermal resistance. CONSTITUTION: A polyimide porous nanofiber web has 50% or more of porosity and has 30,000-50,000 g/mol of weight-average molecular weight. The nanofiber web is formed of fiber(4) aggregate. The nanofiber web has 20-50 MPa of tensile strength after a wet process. A method for measuring the tensile strength after the wet process comprises a step of dipping the nanofiber web in ionized water at room temperature for a week, and a step of removing moisture from the surface of the nanofiber web at 30°C. |
