摘要
以硫酸（98％）为插层剂、过氧化氢（30％）为氧化剂，用化学法制备膨胀石墨。通过正交实验确定最佳制备备件。结果表明：当石墨与硫酸重量比为1：3，硫酸与过氧化氢体积比为1：0．1，反应时间90min，反应温度50℃，膨化温度1000％，膨化时间20s时，膨胀石墨的膨胀容积可达250ml／g。
Expanded graphite was prepared by a chemical method, in which sullfuric acid （98%） acted as inserting agent, and hydrogen peroxide （30%） was adopted as oxidant. The conditions for preparing the expanded graphite were optimized by orthogonal testing. Results showed that expanded graphite having an exfoliation volume of 250ml/g could be produced under the optimum condi- tions with the weight ratio of natural flake graphite ： sulfuric acid being 1 ： 3, the volume ratio of sulfuric acid ： hydrogen peroxide being 1：0. 1, reaction time of 90min, reaction temperature of 50℃ , exfoliation temperature of 1000℃ , and exfoliation time of 20s.
出处
《中国材料科技与设备》
2006年第3期86-88,92,共4页
Chinese Materials Science Technology & Equipment
关键词
膨胀石墨
膨胀容积
正交实验
Expanded graphite
Exfoliation volume
Orthogonal test
