CTAB与硅烷偶联剂复合改性对硅酸镁锂结构的影响

Influence of Compounding Modified with CTAB and Silane Coupling Agent on Structure of Hectorite

为了研究有机改性对硅酸镁锂结构的影响,利用阳离子表面活性剂十六烷基三甲基溴化胺（CTAB）和硅烷偶联剂KH570对硅酸镁锂进行有机复合改性,然后对改性前后的样品进行X射线衍射（XRD）、红外光谱（FT-IR）、扫描电子显微镜（SEM）等测试分析。结果表明：CTAB和KH570均能插入硅酸镁锂层间;CTAB改性和CTAB-KH570复合改性效果较好,分别使硅酸镁锂的层间距由原来的1.14nm增加至1.51nm和1.55nm,并且CTAB的引入会改善硅酸镁锂的结晶性。

To research the influence of organically compounding on structure of hectorite,the hectorite was organically compounding modified by using cetyltrimethylammonium bromide （CTAB） and silane coupling agent KH-570.The results of X-raw diffraction（XRD）,Fourier transform infrared spectroscopy（FT-IR） and field emission scanning electron microscopy（SEM） indicate that,both CTAB and KH570 had intercalated into the layers of hectorite;modifying agent CTAB and CTAB-KH570 had the better effect,made the spacing of hectorite layers increased from 1.14nm to 1.51nm and 1.55nm respectively;In addition,intercalate with CTAB can improve hectorite＇s crystallinity also.