Functionalized Graphenes and Thermoplastic Nanocomposites Based upon Expanded Graphite Oxide

作者：Peter Steurer, Rainer Wissert, Ralf Thomann, Rolf Mülhaupt · 发表于：Macromolecular Rapid Communications · 年份：2009 · DOI：10.1002/marc.200800754 · 被引用次数：523 · 研究领域：Graphene research and applications、Advancements in Battery Materials、Supercapacitor Materials and Fabrication

Exfoliation of expanded GO represents an attractive route to functionalized graphenes as versatile 2D carbon nanomaterials and components of a wide variety of polymer nanocomposites. Thermally reduced graphite oxides (TrGO) with specific surface areas of 600 to 950 m(2) · g(-1) were obtained by oxidation of graphite followed by thermal expansion at 600 °C. Thermal post treatment at 700 °C and 1 000 °C increased carbon content (81 to 97 wt.-%) and lowered resistivity (1 600 to 50 Ω · cm). During melt extrusion with PC, iPP, SAN and PA6, exfoliation afforded uniformly dispersed graphenes with aspect ratio > 200. In comparison to conventional 0D and 1D carbon nanoparticles, TrGO afforded nanocomposites with improved stiffness and lower percolation threshold. Recent progress and new strategies in development of functionalized graphenes and graphene-based nanocomposites are highlighted.