细鳞片石墨制备低温无硫可膨胀石墨研究  

Low-temperature preparation of sulfur-free expandable graphite from fine flake graphite

作　　者：陈庚[1] 张磊[1] 林闯[1] 耿刚强[1] 

机构地区：[1]长安大学材料学院,陕西西安710064

出　　处：《炭素技术》2015年第6期42-45,49,共5页Carbon Techniques

基　　金：科技部国际合作项目(2008DFA51460)

摘　　要：为了制备低温无硫可膨胀石墨,采用HClO_4/H_3PO_4混酸作为插层剂,选择具有强氧化性的KMnO_4作为氧化剂,并对HClO_4、H_3PO_4、KMnO_4的用量进行研究。研究表明:在C(g):HClO_4(mL):H_3PO_4(mL):KMnO_4(g)=1:3:2:0.1,制备出的可膨胀石墨的起始膨胀温度低至150℃,在600℃时膨胀容积已经达到218 mL/g;通过XRD分析插层的情况,SEM观察膨胀石墨的微观形貌,证实经过插层、氧化处理后鳞片石墨的片层结构发生改变。The low-temperature expandable graphite without sulfur was prepared, using HClO4/H3PO4 mixed acid as an intercalation agent, and KMnO4 as an oxidizer, and the amount of HClO4, H3PO4, KMnO4 was studied. The research showed that under the condition of C（g）：HClO4（mL）：H3PO4（mL）：KMnO4（g）=1：3：2：0.1, the expandable graphite with the intumescent starting temperature as low as 150 ℃ and expansion volume of 218 mL/g at 600 ℃ can be obtained. The intercalation of the situation was analyzed by XRD and the micromorphology of expandable graphite was observed by SEM.

关 键 词：低温无硫可膨胀石墨 起始膨胀温度 膨胀容积 微观形貌 

分 类 号：O613.71[理学—无机化学]