燕山大学学报2016，Vol.40Issue(5)：462-465,4.
高膨胀体积无硫可膨胀石墨的制备与表征
Preparation and characterization of sulfur-free expandable graphite with high expansion volume
摘要
Abstract
Natural flake graphite was used as raw material, potassium permanganate as oxidizing agent and perchloric acid as inser⁃ting reagent in preparation process.An orthogonal test method was adopted for optimizing of preparing parameters.The experimental results show that the optimum conditions are as follows: natural flake graphite ∶ KMnO4 ∶ perchloric acid( g ∶ g ∶ mL) =1 ∶ 0.4 ∶7, the reaction temperature and time are 30 ℃ and 70 min respectively. Under this condition the expandable graphite has a quite high expansion volume of 390 mL/g. The reaction temperature influences the reaction system most, followed by the amount of KMnO4 , the reaction time and the amount of HClO4 . Meanwhile, the prepared samples were characterized by scanning electron microscope ( SEM) and fourier transform infrared spectroscopy ( FTIR) .SEM results show that the expandable graphite has a wider space between layers than natural flake graphite. Expanded graphite shows worm-like structure and many large and medium pores are observed on the surface of expanded graphite with numerous holes. FTIR results show that the HClO4 had been successfully entered into the space between layers.关键词
可膨胀石墨/插层剂/氧化剂/膨胀体积/无硫Key words
expandable graphite/inserting reagent/oxidizing agent/expansion volume/sulfur-free分类
化学化工引用本文复制引用
贺君,杨红侠,任小慧,邢丽飞,郑晓强..高膨胀体积无硫可膨胀石墨的制备与表征[J].燕山大学学报,2016,40(5):462-465,4.基金项目
河北省科技计划项目 （）
