高倍率低温可膨胀石墨制备的研究  

Study on Preparation of the High Expansion Volume and Low Temperature Expansible Graphite

作　　者：王玲[1] 宋克敏[1] 张帅华[1] 李庆[2] 李云鹏[1] 刘敏[1] 

机构地区：[1]河北农业大学理学院,保定071001 [2]河北农业大学食品科技学院,保定071001

出　　处：《硅酸盐通报》2009年第4期844-849,共6页Bulletin of the Chinese Ceramic Society

基　　金：河北省科技攻关资助项目(06240223D-3)

摘　　要：本文以HNO3/HBrO3/KMnO4为氧化插层体系制备低温可膨胀石墨,研究了制备低温可膨胀石墨的最佳条件和物料配比,讨论了插层试剂对起始膨胀温度的影响,提出了氧化插层的机理。研究表明:制备低温可膨胀石墨的反应温度为室温(25℃);反应时间40min;石墨、硝酸、溴酸钠、高锰酸钾的最佳质量比为1∶3∶0.1∶0.07,由此方法制得的可膨胀石墨起始膨胀温度为130℃,600℃时膨胀容积为350mL/g。The HNO3/HBrO3/KMnO4 oxidation intercalation system for preparing expansible graphite was developed in this paper. To obtain the optimum conditions, the influence of the material proportion and the inserting reagent on the initiation expansion temperature was studied. The mechanism of the oxidation and intercalation was brought forward also. The reaction was carried out at 25 ℃ for 40 min, the optimal mass ratio of graphite, nitric acid, sodium bromate and potassium permanganate was 1 ： 3： 0.1 ： 0.07. The initiation expansion temperature and the expansion volume of the product was 130 ℃ and 350 mL/g at 600℃, respectively.

关 键 词：低温可膨胀石墨 起始膨胀温度 膨胀容积 插层试剂 溴酸钠 

分 类 号：O613[理学—无机化学]