【摘要】 测定了无机蒙脱石(MMT)的阳离子交换容量(CEC为1.049 mmol/g),以十六烷基三甲基溴化铵作插层剂,分别考察了悬浊液的酸碱度、插层剂用量、插层次数及搅拌方式对MMT的层间距d001的影响,用X-射线衍射对插层结果进行表征.结果表明,当插层剂的摩尔数与无机MMT的CEC之比为1∶1、插层温度70~80℃时,用稀的NaOH溶液调节MMT悬浊液的pH值为12,先在水相用四甲基铵进行插层,抽滤、充分洗涤,然后将滤饼分散在体积分数为70%乙醇溶液中,再用自制的酯基季铵盐进行二次插层,用均质器高速搅拌,搅拌速度约5 000 r/min,每次插层时间为1 h.在该条件下制备的有机MMT的d001达3.5 nm左右,且无机MMT的一级衍射峰完全消失.更多还原

【Abstract】 The Cation Exchange Capacity(CEC) of the inorganic montmorillonite(MMT) is measured(CEC=1.049 mmol/g).The conditions of affacting organic MMT(OMMT) layer space(d001) are discussed while applying cetyltrimethylammonium bromide(CTAB)intercalated,including pH of the soliquoid,the molar ratio(quaternary ammonium salt∶CEC),intercalated times and agitating manners etc,the products are characterized by X-Ray Diffraction(XRD).The results show that inorganic MMT are intercalated in water applying tetramethyl-ammonium,filtering,washing thoroughly.It is also found that the products are intercalated twice in 70% ethanol solution by self-made ester bond quaternary ammonium salt when both applying homogenizer agitating one hour and the rate of agitation being about 5 000 r/min.The d001 of the organic MMT goes up to 3.5 nm.tand the first diffration peak of inorganic MMT is lost completely.更多还原