摘要
采用离子交换法,将铝酸三钙(C3A)投加至十二烷基硫酸钠(sodium dodecyl sulfate,SDS)溶液中,通过调节pH值和反应温度,制备出插入SDS阴离子的钙铝层状双氢氧化物(CaAl-SDS-layered double hydroxide,CaAl-SDS-LDH)。通过X射线衍射、红外光谱、透投射电镜及热重-差热分析等手段对样品分析表征。结果表明,在SDS浓度为0.2mol·L-1,pH值11,合成温度25℃为最佳合成工艺条件,所得CaAl-SDS-LDH层间距为2.79nm,SDS阴离子在层间以双分子层的形式垂直于层板形成交错有序的排布;CaAl-SDS-LDH中有机物质量分数为40%。经SDS改性后的CaAl-SDS-LDH具有层状结构,晶粒尺寸较小,粒径分布集中,晶粒有序度较高。
Modified CaAl-layered double hydroxide （CaAl-SDS-LDH） was prepared by introducing sodium dodecyl sulfate （SDS） into tricalcium aluminate （C3A） through an ion-exchange method under various pH values and reaction temperatures. The product was characterized by using X-ray diffraction （XRD）, Fourier transform infrared （FTIR）, transmission electron microscopy （TEM）and thermogravimetric-differential thermal analysis （TGDTA）. The optimized process conditions are the initial SDS concentration of 0.2 mol·L-1, pH value of 11 and reaction temperature of 25 ℃. The organic content on organo-CaAl-LDH is about 40% （mass fraction）. And the layer structure is not destroyed with the interlayer spacing value of 2.79 nm, and the intercalated surfactants are more likely to adopt a bilayer arrangement model, and the crystalline structure is more integrity.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2010年第9期1544-1548,共5页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No20907029)和(No20677037)资助项目
