| abstract |
Preparing an aqueous polyamic acid solution containing a water-soluble agent, forming an oil-in-water emulsion containing the aqueous polyamic acid salt, removing a solvent of the oil-in-water emulsion to form a polyamic acid foam, and the polyamic acid foam Disclosed is a polyimide foam manufacturing method comprising the step of heat treatment. The present invention is capable of producing a stable oil-in-water emulsion and polyimide foam, exhibits high porosity and specific surface area, is easy to control pore size and porosity, and facilitates mass production. |