HClO_4/H_2SO_4体系制备的低硫可膨胀石墨的结构与性能  

Structure and Properties of Low-Sulfur Expandable Graphite Prepared by Using Mixed Acid System of Perchioric Acid and Sulfuric Acid

作　　者：林雪梅[1] 潘功配[1] 

机构地区：[1]南京理工大学化工学院,南京210094

出　　处：《非金属矿》2005年第5期8-10,共3页Non-Metallic Mines

摘　　要：采用多种分析手段,对HClO4/H2SO4/KMnO4/CH3COOH氧化插层体系制备的低硫可膨胀石墨的结构和性能进行了研究。发现制备的可膨胀石墨从181.2℃开始发生明显的热失重,具有低温膨胀性能,300℃时的膨胀容积为115mL/g,400℃时可达263mL/g,可膨胀石墨的石墨片层间存在SO42-、ClO4-、CH3COO-阴离子插层物和H2SO4、HClO4、CH3COOH等中性分子插层物,可膨胀石墨的X射线衍射图谱在2θ为29.25°处出现一个不太强的衍射特征峰。The low-sulfur expandable graphite was tested and analyzed by morden analyzed methods, which prepared by using HClO4/H2SO4/ KMnO4/CH3COOH mixed compounds as a oxidation-intercalation system. The low-sulfur expandable graphite begins to have obvious thermal loss weight at 181.2℃, and has low-temperature expanding property, its expanding volume at 300℃ is about 115 mL/g and expanding volume at 400℃ is high to 263mL/g. The negative ion SO4^2 - ,ClO4^-. CH3COO^- and the neutral molecules H2SO4,HClO4,CH3COOH exist as intercalation compounds in space between the graphite pieces. The WAXD spectrum of the low-sulfur expandable graphite has a medial strength feature diffraction peak at where 2θ is 29.25°.

关 键 词：低硫可膨胀石墨 低温膨胀 红外光谱 热失重 X射线衍射 低硫可膨胀石墨 结构与性能 制备 SO4^2- ClO4^- 衍射图谱 结构和性能 H2SO4 HCLO4 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业] O613.71[理学—无机化学]