Synthesis and properties of iodo functionalized graphene oxide/polyimide nanocomposites

• Published in: Composites. Part B, Engineering Engineering, 2014-01, Vol.56, p.365-371
• Main Authors: Park, Ok-Kyung, Kim, Seon-Guk, You, Nam-Ho, Ku, Bon-Cheol, Hui, David, Lee, Joong Hee
• Format: Article
• Language: English
• Subjects: A. Nano-structures; A. Polymer matrix composites (PMCs); A. Thin films; Applied sciences; B. Electrical properties; B. Mechanical properties; Composites; Exact sciences and technology; Forms of application and semi-finished materials; Polymer industry, paints, wood; Technology of polymers
• ISSN: 1359-8368; 1879-1069
• DOI: 10.1016/j.compositesb.2013.08.065

We report an effective method to fabricate the graphene-based high performance polyimide (PI) nanocomposites via the in situ polymerization with iodo functionalized graphene oxide (I-Ph-GO). The electrical conductivity of the reduced iodo functionalized graphene oxide (R-I-Ph-GO)/PI (1/99w/w) nanocomposites was 5.2×10−2S/m, which is about 107 times higher than that of the reduced graphene oxide (R-GO)/PI (1/99w/w) nanocomposites. The tensile modulus of R-I-Ph-GO/PI (0.5/99.5w/w) nanocomposites was increased from 2.5GPa to 6.8GPa, and the tensile strength was increased from 75MPa to 123MPa, which were approximately 170% and 64% enhancement compared to those of pure PI, respectively. In addition, the water transmission rate of an I-Ph-GO/PI (0.2/99.8w/w) nanocomposites film was lower than that of R-GO/PI nanocomposites and was reduced by about 67% compared to that of pure PI.