镁铝水滑石的制备及其表面改性  

Synthesis and surface modification of Mg-Al hydrotalcite

作　　者：翁腾飞[1] 周志明[1] 冉长荣[1] 

机构地区：[1]重庆大学化学化工学院,重庆400030

出　　处：《应用化工》2009年第9期1355-1357,1360,共4页Applied Chemical Industry

摘　　要：采用共沉淀法制备了Mg∶Al的摩尔比为2∶1的镁铝水滑石,用非离子表面活性剂单硬脂酸甘油酯对其进行表面改性,研究了改性剂的用量、改性时间、改性温度对活化指数的影响。结果表明,最佳改性工艺条件为:改性剂用量为4%,改性时间为40 min,改性温度为60℃。单硬脂酸甘油酯对镁铝水滑石的表面处理属于氢键吸附,表面处理效果理想,镁铝水滑石的晶体结构并未因改性受到影响。Magnesium-aluminum hydrotalcite with Mg/Al molar ratio of 2：1 was synthesized by coprecipitation. Mg/Al-hydrotalcite was surface modified by using monostearin. The main factors affecting activation index have been studied. The optimum process conditions are as follows：the dosage of modification agent 4% ,the time of modification 40 min, the temperature of modification 60℃. FTIR, X-ray and TG-DTA were performed to characterize the Mg/Al-hydrotaleites. It was found that hydrogen binding adsorption was existed between Mg/Al-hydrotalcite Mg/Al-hydrotalcite was not changed and monostearin, the treating effect was good, and the structure of after surface modification.

关 键 词：镁铝水滑石 单硬脂酸甘油酯 表面改性 正交实验 

分 类 号：O614.2[理学—无机化学] O614.3[理学—化学]