CHEN Ya-ping, LUO Rui-ying, LI Shu-yan, ZHANG Jian, LI Hui, WANG Xuan-jun, . Preparation of highly-expandable graphite using waste liquid propellants of nitric-27S as one of intercalating agents. New Carbon Mater., 2011, 26(6): 465-469.
Citation:
CHEN Ya-ping, LUO Rui-ying, LI Shu-yan, ZHANG Jian, LI Hui, WANG Xuan-jun, . Preparation of highly-expandable graphite using waste liquid propellants of nitric-27S as one of intercalating agents . New Carbon Mater., 2011, 26(6): 465-469.
CHEN Ya-ping, LUO Rui-ying, LI Shu-yan, ZHANG Jian, LI Hui, WANG Xuan-jun, . Preparation of highly-expandable graphite using waste liquid propellants of nitric-27S as one of intercalating agents. New Carbon Mater., 2011, 26(6): 465-469.
Citation:
CHEN Ya-ping, LUO Rui-ying, LI Shu-yan, ZHANG Jian, LI Hui, WANG Xuan-jun, . Preparation of highly-expandable graphite using waste liquid propellants of nitric-27S as one of intercalating agents . New Carbon Mater., 2011, 26(6): 465-469.
Highly-expandable graphite was prepared by chemical oxidization using flake graphite as the host material and waste liquid propellants of nitric-27S, potassium permanganate, sulfuric acid and acetic acid as guest compounds. Various factors influencing the volume expansion were studied, such as the amounts of potassium permanganate, nitric-27S and acetic acid. Optimum preparation conditions were obtained using orthogonal experimental design. The preparation of graphite intercalation compounds was confirmed by SEM and XRD. Results showed that the most expandable graphite with a expansion volume of 320mL · g-1 was obtained at 40℃ for 90min using flake graphite, potassium permanganate, nitric-27S, sulfuric acid and acetic acid in the following respective amounts: 1g, 1g, 1.25mL, 1.25mL and 2mL. The amount of potassium permanganate is the most important factor affecting the expansion volume.
DownLoad: