双氧水氧化法制备可膨胀石墨  

Preparation of expandable graphite using H_2O_2 as oxidation

作　　者：赵国刚[1,2] 马吉阳[2,3] 吴岩[2] 

机构地区：[1]哈尔滨理工大学,哈尔滨150080 [2]黑龙江科技大学石墨新材料工程研究院,哈尔滨150022 [3]黑龙江科技大学材料科学与工程学院,哈尔滨150022

出　　处：《黑龙江科技学院学报》2014年第2期173-176,共4页Journal of Heilongjiang Institute of Science and Technology

摘　　要：为优化可膨胀石墨的生产工艺,降低生产成本,以300μm的大鳞片石墨为原材料、H2O2为氧化剂、浓H2SO4为插层剂,采用化学氧化法制备可膨胀石墨。通过单因素实验法讨论了H2O2用量、H2SO4用量、反应时间和反应温度等因素对产品膨胀容积的影响,并确定了最佳实验方案。结果表明:在石墨用量为10 g、H2SO4用量28 mL、H2O2用量1 mL、反应温度40℃、反应时间1h的条件下,可制得膨胀容积为200 mL/g的可膨胀石墨。研究表明,H2O2制备可膨胀石墨的关键在于反应速度的控制,采用恒温静止反应的方法更为有利。Aimed at optimizing the production process and lowering the production costs of expandable graphite,this paper introduces an approach to preparing expandable graphite（ EG） by chemical oxidation method,using 300 μm large flake graphite as raw material,H2O2as oxidant,concentrated H2SO4 as intercalation agent. The paper goes further by discussing the impact of the amount of H2O2and H2SO4,reaction time,reaction temperature on product expansion volume and thereby optimizing the process conditions for preparing the EG by single factor tests. Results show that manufacturing the EG with expansion volume（ EV） of 200 mL / g is possible with the optimal conditions： natural flake graphite of 10 g,H2SO4of 28 mL,H2O2of 1 mL,reaction temperature of 40 ℃,and reaction time of 1 h. The study concludes that the preparation of EG using H2O2is governed by the reaction rate control,but benefits more from the adoption of the constant temperature static reaction.

关 键 词：可膨胀石墨 H2O2 化学氧化法 恒温静止反应 

分 类 号：TB321[一般工业技术—材料科学与工程]