Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Environmental and Chemical Engineering, Nanchang University, Nanchang 330047, China; School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200072, China; Chemistry Discipline, Faculty of Science and Technology, Queensland University of Technology, 2 George Street, GPO Box 2434, Brisbane, Queensland 4001, Australia.
Key Laboratory of Poyang Lake Environment and Resource Utilization, Ministry of Education, School of Environmental and Chemical Engineering, Nanchang University, Nanchang 330047, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 May 5;125:195-200. doi: 10.1016/j.saa.2014.01.062. Epub 2014 Jan 31.
Na-dodecylbenzenesulfate (SDBS), a natural anionic surfactant, has been successfully intercalated into a Ca based LDH host structure during tricalcium aluminate hydration in the presence of SDBS aqueous solution (CaAl-SDBS-LDH). The resulting product was characterized by powder X-ray diffraction (XRD), mid-infrared (MIR) spectroscopy combined with near-infrared (NIR) spectroscopy technique, thermal analysis (TG-DTA) and scan electron microscopy (SEM). The XRD results revealed that the interlayer distance of resultant product was expanded to 30.46 Å. MIR combined with NIR spectra offered an effective method to illustrate this intercalation. The NIR spectra (6000-5500 cm(-1)) displayed prominent bands to expound SDBS intercalated into hydration product of C3A. And the bands around 8300 cm(-1) were assigned to the second overtone of the first fundamental of CH stretching vibrations of SDBS. In addition, thermal analysis showed that the dehydration and dehydroxylation took place at ca. 220 °C and 348 °C, respectively. The SEM results appeared approximately hexagonal platy crystallites morphology for CaAl-SDBS-LDH, with particle size smaller and thinner.
十二烷基苯磺酸钠（SDBS）是一种天然阴离子表面活性剂，在三水铝酸钙水化过程中，在 SDBS 水溶液存在的条件下成功地插入到 Ca 基 LDH 主体结构中（CaAl-SDBS-LDH）。采用粉末 X 射线衍射（XRD）、中红外（MIR）光谱与近红外（NIR）光谱技术、热分析（TG-DTA）和扫描电子显微镜（SEM）对所得产物进行了表征。XRD 结果表明，产物的层间距扩展到 30.46 Å。MIR 与 NIR 光谱的结合提供了一种有效的方法来阐明这种插层作用。NIR 光谱（6000-5500 cm（-1））显示出明显的谱带，用于解释 SDBS 插入 C3A 水化产物中。而 8300 cm（-1）左右的谱带则归因于 SDBS 的 CH 伸缩振动的第一基频的第二泛频。此外，热分析表明，脱水和脱羟分别在约 220°C 和 348°C 发生。SEM 结果表明，CaAl-SDBS-LDH 呈现出近似六方片状形貌，粒径更小、更薄。
