In situ polymerization of polyimide‐based nanocomposites via covalent incorporation of functionalized graphene nanosheets for enhancing mechanical, thermal, and electrical properties

摘要: In this study, we report an effective method to fabricate high-performance polyimide (PI)-based nanocomposites using 3-aminopropyltriethoxysilane functionalized graphene oxide (APTSi-GO) as the reinforcing filler. APTSi-GO nanosheets exhibit good dispersibility and compatibility with polymer matrix because of strong interfacial covalent interactions. PI-based different loadings (FGNS) were prepared by in situ polymerization thermal imidization. The mechanical performance, stability, electrical conductivity FGNS/PI are significantly improved compared those pure PI adding only a small amount FGNS. For example, 79% improvement tensile strength 132% increase modulus achieved 1.5 wt % conductivities 2.6 × 10−3 S/m 0.321 W/m·K, respectively, which ∼1010 two times higher than PI. Furthermore, incorporation improves glass-transition temperature stability. success approach provides rationale for developing multifunctional composite materials. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42724.