摘要
从锂皂石原矿中提纯出精矿,经不同浓度的稀盐酸处理得到层电荷数逐渐降低的锂皂石样品,然后对其进行钠化,再与十六烷基三甲基溴化铵(CTAB)反应从而制得有机锂皂石。有机锂皂石在硝基苯中的黏度和红外光谱分析表明当盐酸浓度为0.2 moL.L-1时,锂皂石的层状结构几乎保持不变,此时层电荷数降低到了黏度最大的临界点。有机化最佳工艺条件为:CTAB用量1.4 CEC、反应温度80°C以及反应时间12 h。
The hectorite is extracted from a raw ore, and then is treated in dilute hydrochloric acid of different concentrations to prepare a series of samples with sequentially reduced layer charge which is treated with sodiurn salt and is modified by cetyltrimethylammonium bromide （CTAB） subsequently. The viscosity of hydrophobic hectorite on nitrobenzene and FT-IR spectroscopy indicate that when the concentration of hydrochloric acid is 0.2 moL/L, the layer structure of hectorite almost keeps intact, and its layer charge decreases to a critical point in which the viscosity of the corresponding hydrophobic hectorite on nitrobenzene reaches its peak. The optimum process conditions of organic modification are as follows： the dosage of CTAB is 1.4CEC, the reaction temperature is 80℃and the reaction time is 12 hours.
出处
《华东交通大学学报》
2011年第6期63-67,共5页
Journal of East China Jiaotong University
关键词
锂皂石
层电荷数
膨胀
有机改性
hectorite
layer charge
swell
organic modification
