Carboxylated Carbon Nanotube/Polyimide Films with Low Thermal Expansion Coefficient and Excellent Mechanical Properties.

ABSTRACT: Polyimide (PI) films with excellent heat resistance and outstanding mechanical properties have been widely researched in microelectronics and aerospace fields. However, most PI films can only be used under ordinary conditions due to their instability of dimension. The fabrication of multifunctional PI films for harsh conditions is still a challenge. Herein, flexible, low coefficient of thermal expansion (CTE) and improved mechanical properties films modified by carboxylated carbon nanotube (C-CNT) were fabricated. Acid treatment was adapted to adjust the surface characteristics by using a mixture of concentrated H₂SO₄/HNO₃ solution to introduce carboxyl groups on the surface and improve the interfacial performance between the CNT and matrix. Moreover, diffe

SUBMITTER: Lu C 

PROVIDER: S-EPMC9654399 | biostudies-literature | 2022 Oct

REPOSITORIES: biostudies-literature