Preparation and properties of polyimide/graphene oxide nanocomposite films with Mg ion crosslinker

• Published in: European polymer journal Vol. 48; no. 8; pp. 1394 - 1405
• Main Authors: Kong, Jin-Yeon, Choi, Myeon-Cheon, Kim, Gwang Yeon, Park, Jin Joo, Selvaraj, M., Han, Mijeong, Ha, Chang-Sik
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.08.2012; Elsevier
• Subjects: Applied sciences; Composites; Cross-linking; Exact sciences and technology; Forms of application and semi-finished materials; Graphene oxide; Magnesium ions; Polyimide; Polymer industry, paints, wood; Properties; Technology of polymers; Polyimide; Magnesium ions; Graphene oxide; Properties; Cross-linking; Transparency; Dispersion degree; In situ; Aromatic polymer; Polyaddition; Optical properties; Nanocomposite; Magnesium hydroxide; Permittivity; Electrical properties; Dielectric properties; Mechanical properties; Tensile property; Experimental study; Surface electrical conductivity; Pyromellitimide polymer; Morphology; Preparation; Concentration effect; Graphite Oxides
• ISSN: 0014-3057; 1873-1945
• DOI: 10.1016/j.eurpolymj.2012.05.015

[Display omitted] ► Polyimide(PI)/graphene oxide(GO) hybrid films were prepared by cross-linking using Mg ions. ► The PI/GO nanocomposites showed enhanced tensile properties compared to pristine PI. ► Mg ions can bond between the oxygen functional groups and carboxylate groups of GO and PAA. ► The nanocomposites may have potential use as dielectric materials. Polyimide(PI)/graphene oxide(GO) nanocomposite films were prepared by chemical cross-linking using small amounts of divalent Mg ions. The PI/GO nanocomposites showed enhanced tensile properties compared to pristine PI due to the presence of exfoliated GO in the PI matrix as well as crosslinking between poly(amic acid) (PAA), which is a precursor of PI, and GO by Mg ions. The hydrogen bonds between PAA and GO suppressed the phase separation between PI and GO, and small amounts of Mg ions can bond between the oxygen functional groups and carboxylate groups of GO and PAA.