Zhang Ying, Fang Yu, Lin Shuyu, Wang Shan, Hu Daodao
Key Laboratory for Macromolecular Science of Shaanxi Province, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, PR China.
Ultrasonics. 2006 Dec 22;44 Suppl 1:e379-83. doi: 10.1016/j.ultras.2006.05.006. Epub 2006 Jun 2.
A polymeric microgel template/ultrasonic degradation method for the preparation of organic-inorganic nano-composites is proposed and successfully used in the preparation of poly(sodium acrylate) (PAANa) and lanthanium hydroxide nano-composites (PAANa/La(OH)(3)). The nano-composites were prepared via three steps. La(NO(3))(3) was trapped within the PAANa microgels first, and then the metal ions within the microgels were hydrolyzed by slow introduction of ammonia. Finally, the composites of the micro-particles were degraded by ultrasonic treatment. The product was characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques. The average diameter of the composites prepared in this way is about 50 nm and the size distribution of them is narrow. TGA analysis shows that the content of La(OH)(3) in the composites is about 20%.
提出了一种用于制备有机-无机纳米复合材料的聚合物微凝胶模板/超声降解方法，并成功用于制备聚丙烯酸钠（PAANa）和氢氧化镧纳米复合材料（PAANa/La(OH)₃）。纳米复合材料通过三个步骤制备。首先将La(NO₃)₃捕获在PAANa微凝胶中，然后通过缓慢引入氨使微凝胶内的金属离子水解。最后，通过超声处理降解微粒复合材料。通过热重分析（TGA）、X射线衍射（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）技术对产物进行表征。以这种方式制备的复合材料的平均直径约为50nm，且尺寸分布狭窄。TGA分析表明，复合材料中La(OH)₃的含量约为20%。
