高倍率可膨胀石墨的制备及表征

Preparation and Characterization of High Rate of Expandable Graphite

以天然鳞片石墨为原料,采用HNO3/KMnO4/HClO4/HAc为氧化插层体系制备可膨胀石墨,确定了制备可膨胀石墨的最佳条件:反应时间为30 min,反应温度为40℃,HNO3(mL)∶KMnO4(g)∶HClO4(mL)∶HAc(mL)=2.5∶1.9∶8.0∶3.0的条件下,制得的可膨胀石墨的膨胀容积为500 mL/g。并以XRD、SEM、FTIR等仪器,对可膨胀石墨的结构、形貌、和内部组成等进行了分析和表征。

The expandable graphite was prepared by using nature flake graphite, HNO3/KMnO4/HClO4/HAc as the oxidant and intercalation agent. Experiments showed that the optimal process conditions were reaction of temperature for 40%, reaction of time in 30min, the reactants of HNO3 ： KMnO4 ： HClO4 ： HAc = 2.5 ： 1.9 ： 8.0 ： 3.0, and in this condition maximum expansion ratio of 500 mL/g. The structure, morphology, internal composition and thermal decomposition properties of expandable graphite were analyzed and characterized by SEM, FTIR and XRD.