POLYIMIDE AEROGEL HAVING CONTROLLED PARTICLE SIZE AND PORE STRUCTURE, AND METHOD FOR PRODUCING SAME

摘要

Proposed are a polyimide aerogel having a controlled particle size and pore structure, and a method for producing the same. More particularly, proposed are a polyimide aerogel in which not only can the particle size of a polyimide resin be controlled, but the pore structure of the polyimide aerogel can also be controlled through an organic solvent mixture, and a method for producing the polyimide aerogel. This can be achieved through: a first step of preparing a solvent; a second step of synthesizing a polyamic acid resin by reacting a diamine-based monomer and an acid anhydride monomer in the solvent; a third step of forming a polyimide resin through imidization of the polyamic acid resin by subjecting the polyamic acid resin to a high-temperature reaction at 150 to 200° C.; a fourth step of forming a polyimide wet-gel by crosslinking the polyimide resin; and a fifth step of forming a polyimide aerogel by replacing the solvent included in the polyimide wet-gel with a solvent having a relatively lower boiling point than the solvent included in the polyimide wet-gel and then removing the solvent.