Organic bentonite from purified bentonite was prepared using hexadecyl trimethyl ammonium chloride (CTAC). The structures of bentonite and the organic bentonite were characterized by using XRD, FTIR and TGA techniques. The results showed that the CTAC cations were successfully absorbed in the layers of bentonite clay, the distance of the layers were expanded, and the dispersion of the the organic bentonite was at nanometer dimension. Acrylate copolymer superabsorbent composite was prepared using the organic bentonite, and the effect of the content of CTAC used in the preparation of organic bentonite on the water ab-sorbency of the superabsorbent composite was investigated. When the content of CTAC was 35 %, the water absorbency of the superabsorbent composite reached 695 g/g, which is higher than that of the superabsorbent composite prepared with bentonite (432 g/g).%以膨润土为原料,用十六烷基三甲基氯化铵(CTAC)对其进行有机改性,通过X射线衍射、红外光谱和热重测试了膨润土与有机膨润土的结构,分析了改性前后膨润土的结构变化状况.结果表明,CTAC成功插入膨润土的晶层间,层间距明显增大,达到了纳米级分散.将有机膨润土用于制备丙烯酸共聚物类无机-有机复合高吸水性树脂,讨论了膨润土有机改性时不同CTAC用量对复合树脂吸液率的影响,在CTAC用量为35％时,有机膨润土复合树脂的吸水率最大为695 g/g,而膨润土复合树脂的吸水率只为432 g/g.
展开▼
