蒙脱石的有机改性工艺及凝胶性能研究

Organic modification technics and gel performance of montmorillonite

本文采用悬浮液有机改性工艺方法，以季铵盐为有机改性剂，研究了山东某提纯蒙脱石的有机改性工艺条件。研究发现，季铵盐改性剂碳链越长，蒙脱石的层电荷越低，有机改性蒙脱石的凝胶性能越好。其他关键工艺参数为：有机改性剂用量为钠化土阳离子交换容量的1．1～1．3倍，有机改性温度在70～80℃，有机改性时间为2．0h。

By means of slurry organic modification technics, the purified montmorillonite samples from Shandong province were organically modified by quaternary ammonium salt. The relationship between the key parameters including layer charge of montmorillonite and gel performance of organic montmorillonite was studied. The conclusions were as follows： the longer the carbon chain of quatemary ammonium salt, the better gel performance of organic montmorillonite; the lower the layer charge of montmorillonite, the better performance of organic montmorillonite; the dosage of 1831 modifier was 1.1 ～ 1.3 CEC, the reaction temperature was 70 ～ 80 ℃, the reaction time was 2.0 hours.