电化学法制备无硫可膨胀石墨的实验研究  

Experimental study on preparation of sulfur-free expandable graphite by electrochemical method

作　　者：周国江[1] 冯晓彤[1] 张伟君[2] 

机构地区：[1]黑龙江科技大学环境与化工学院,哈尔滨150022 [2]黑龙江省科学院高技术研究院,哈尔滨150020

出　　处：《黑龙江科技大学学报》2015年第3期247-250,255,共5页Journal of Heilongjiang University of Science And Technology

基　　金：国家国际科技合作专项项目(2014DFR40480);黑龙江省应用技术研究与开发计划项目(WBBA202);哈尔滨市应用技术研究与开发项目(2013AE4AW048)

摘　　要：以75μm天然鳞片石墨为原料、HClO4-CH3COOH混合酸为电解液,采用电化学法制备可膨胀石墨。通过单因素实验分析影响因素对石墨膨胀容积的影响,并对制得的可膨胀石墨和膨胀石墨的形貌、结构进行SEM和XRD表征,以及含硫量测定。结果表明:无硫可膨胀石墨的最佳制备条件为:石墨(g)与电解液(m L)配比1∶7,HClO4(m L)与CH3COOH(m L)体积比4∶1,电流密度0.06 A/cm2,反应温度20℃,反应时间60 min,电解液质量分数70%。制得无硫可膨胀石墨的膨胀容积为150 m L/g。该研究为无硫可膨胀石墨的制备提供了一种途径。This paper is devoted to an experimental study on the preparation of the sulfur-free expandable graphite using HClO4 and CH3COOH as electrolyte,the 75 μm natural flake graphite as raw material and employing electrochemical method. The study involves analyzing the influence factors on the expansion volume（ EV） by single factor experiments and characterizing the morphology and structure of expandable graphite and expanded graphite by SEM and XRD,and determining the content of sulfur. The study suggests that the optimum preparation conditions for sulfur-free expandable graphite are： graphite（ g） ∶ electrolyte（ m L） = 1∶ 7,HClO4（ m L） ∶ CH3COOH（ m L） = 4∶ 1,current density of 0. 06 A / cm2,reaction temperature of 20 ℃,reaction time of 60 min,the concentration of mixed acid of 70%,and the maximum EV of up to 150 m L / g. The study provides a way for the preparation of sulfur free and expandable graphite.

关 键 词：电化学法 可膨胀石墨 无硫 HCLO4 CH3COOH 

分 类 号：TQ127.11[化学工程—无机化工] O657.1[理学—分析化学]