Preparation of a novel multifunctional integrated polyimide foam with high temperature resistance and hydrophobic and oleophobic properties

Abstract

In this paper, a novel multifunctional integrated polyimide foam (PIF) was prepared with high temperature resistance and hydrophobic and oleophobic properties. The glass transition temperature of the neat PIF was as high as 306 °C. After modification by fluorosilane, the contact angles of water and dimethylsilicone oil of the modified PIF were 155.1 ± 3.5° and 124.8 ± 1.8°, respectively. Meanwhile, after being treated at 300 °C, the contact angles of the modified PIF were still higher than 90° (147.3 ± 2.6° for water contact angle, 107.1 ± 2.8° for oil contact angle), exhibiting excellent hydrophobic and oleophobic properties. Excellent comprehensive performances make the prepared PIF a very promising material, which can be used in the aircraft fuel tanks.