Steurer Peter, Wissert Rainer, Thomann Ralf, Mülhaupt Rolf
Freiburger Materialforschungszentrum and Institut für Makromolekulare Chemie of the Albert-Ludwigs-University Freiburg, Stefan-Meier-Strasse 31, D-79104 Freiburg, Germany.
Macromol Rapid Commun. 2009 Feb 18;30(4-5):316-27. doi: 10.1002/marc.200800754. Epub 2009 Jan 8.
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.
膨胀氧化石墨烯的剥离是制备功能化石墨烯的一种有吸引力的途径，功能化石墨烯作为多功能二维碳纳米材料，是多种聚合物纳米复合材料的组成部分。通过对石墨进行氧化，然后在600°C下进行热膨胀，可获得比表面积为600至950 m(2)·g(-1)的热还原氧化石墨烯（TrGO）。在700°C和1000°C下进行热后处理，可提高碳含量（81至97 wt.-%）并降低电阻率（1600至50 Ω·cm）。在与聚碳酸酯（PC）、等规聚丙烯（iPP）、苯乙烯-丙烯腈共聚物（SAN）和聚酰胺6（PA6）进行熔融挤出过程中，剥离得到了长径比大于200的均匀分散的石墨烯。与传统的零维（0D）和一维（1D）碳纳米颗粒相比，TrGO制备的纳米复合材料具有更高的刚度和更低的渗流阈值。文中强调了功能化石墨烯和基于石墨烯的纳米复合材料开发方面的最新进展和新策略。
