有机蒙脱土的制备及性能表征

Preparation and Properties Characterization of Organophilic Montmorillonite

以天然蒙脱土（MMT）为原料，用季铵盐和氨基酸作为有机插层剂与蒙脱土层间的阳离子进行交换，优化反应条件（改性时间、温度和搅拌速率），制备出层间距不同的有机蒙脱土，用FT—IR、XRD、TEM及TG对产物进行表征。结果表明，4种有机插层荆都已进入蒙脱土的层间，蒙脱土的层间距由1．25nm增加到1．82—4．05nm，其中，以1631-Cl为插层剂，改性时间为4h，改性温度为80℃，搅拌速率为300r／min时，制得的有机蒙脱土层间距大且晶形良好。

By optimizing modifying reaction conditions （reaction time, temperature and whisking speed）, a series of organophilic MMT are prepared from natural MMT by cation exchange with quaternary ammonium salt and amino acid. The org- MMT is characterized by FT -IR, XRD, TEM and TG. The results show that four organic reagents have intercalated into the layers of MMT, spacing of layers of MMT have increased from 1.25 nm to 1.82 - 4.05 nm. When reaction time is 4 h, temperature is 80 ℃ and whisking speed is 300 r/min, the org - MMT modified with 1631 - Cl has larger spacing of layers and better crystal configuration.