采用红外傅立叶变换光谱仪与热重分析仪联动装置在线检测HNO3-CH3COOH-GIC、H2SO4-GIC及H2SO4-CH3COOH-GIC等插层石墨的相变及热分解过程,同时通过快速扫描得到相应时间段内分解产物的红外光谱,并运用Kissinger-Ozawa原理计算了几种典型膨化反应的动力学参数.研究结果揭示了膨化过程的热分解机理,当升温速率在20℃/min～80℃/min范围时,由实验数据计算出膨化反应表观活化能不大于120kJ/mol.
The phase transformations and thermal decomposition of the following graphite intercalation compounds (GICs), HNO3-CH3COOH-GIC, H2SO4-GIC and H2SO4-CH3COOH-GIC, were measured by an FTIR-associated TG apparatus. Using Kissinger and Ozawa principles, the kinetic parameters of some typical exfoliation reactions were evaluated and the thermal decomposition mechanism of the exfoliation process was determined. When the heating rate was in the range of 20- 80℃/min, the activation energies of the exfoliation reactions were all less than 120 kJ/mol.
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