氯酸钾制备膨胀石墨的研究

以氯酸钾为固体氧化剂,制备了高起始膨胀温度的低温可膨胀石墨。考察了反应条件对可膨胀石墨低温膨胀体积的影响,确定了最佳工艺条件:5 g石墨配以0.6 g氯酸钾、13.5 mL浓硫酸、4.5mL浓硝酸、在20℃时反应60min。此条件下得到的可膨胀石墨起始膨胀温度为260℃,在400℃时膨胀体积为300 mL/g。X射线衍射证实了石墨层间化合物的生成,并利用SEM扫描电镜分析了膨胀石墨的微观结构。

Preparation of Expanded Graphite by Potassium Chlorate

Low-temperature expandable graphite with high initial expansion temperature was prepared using the potassium chlorate as the solid oxidant.Reaction conditions was researched on the low-temperature expandable graphite swelling volume,the results showed that the initial expansion temperature was 260 ℃,and the expansion was up to 300 mL/g at 400 ℃ while taking 5 g of graphite,0.6 g of potassium chlorate,13.5 mL of concentrated sulfuric and 4.5 mL of concentrated nitricacid reacting 60 min at 20 ℃.The X-ray diffraction confirmed the formation of graphite intercalation compounds,and the SEM showed the microstructure of expanded graphite.