作　　者： ; ; ; ; ;

机构地区： 郑州大学材料科学与工程学院

出　　处： 《非金属矿》 2009年第1期18-21,共4页

摘　　要： 首先用1mol/L的NaCl溶液对蛭石进行钠化处理,再以5倍蛭石阳离子交换容量的十六烷基三甲基溴化铵为插层剂,对蛭石和钠化蛭石进行有机化插层处理。分别用粉末X射线衍射、热重分析、等离子体发射光谱和扫描电镜对蛭石进行表征和观察。结果表明:蛭石的粒径和片层状结构的完整程度对钠化处理效果有较大影响,片层状结构完整、粒径大的蛭石经钠化处理后,可插层性提高;层状结构不完整,粒径较小的蛭石,钠化处理后可插层性降低。HDTMA+在蛭石层间主要以倾斜双层的方式排列。插层处理后,蛭石的层间距大幅提高,应用领域拓宽。 At the first the vermiculite was modified by lmol/L NaCl solution, then the natural and the modified vermiculites were intercalated by hexadecyl trimethyl ammonium bromide （HDTMA.Br） which molar radio was 5 times of the cation exchange capacity vermiculite. The and properties of vermiculites were characterized by X-ray diffraction, thermal gravimetric analysis, plasma emission spectrum and scanning electron microscopy. The results indicated that the particle size and stratified structure of vermiculite have great affects on the processing of Na-modified, the vermiculite which had good stratified structure and bigger particle size had better effects of intercalation after Na-modification to suit conversely. HDTMA^＋ was arranged by sloping bilayer ways in the interlayer of vermiculite. The application field was enlarged of organo-intercalated vermiculite, which had a bigger interlayer.

关 键 词： 蛭石 钠化处理 有机插层 十六烷基三甲基溴化铵

领　　域： [矿业工程]