da Silva Oberto G, da Silva Filho Edson C, da Fonseca Maria G, Arakaki Luiza N H, Airoldi Claudio
Departamento de Química, CCEN, Universidade Federal da Paraíba (UFPB), 58059-900 João Pessoa, Paraíba, Brazil.
J Colloid Interface Sci. 2006 Oct 15;302(2):485-91. doi: 10.1016/j.jcis.2006.07.010. Epub 2006 Aug 14.
Hydroxyapatite surface silylation with organosilane derivatives (H3CO)3SiR, R being the corresponding organic moieties CH2CH2CH2NH2, CH2CH2CH2NHCH2CH2NH2, and CH2CH2CH2NHCH2CH2NHCH2CH2NH2, was carried out to yield organofunctionalized nanomaterials, named HApR1, HApR2, and HApR3, respectively. The products were characterized by elemental analysis, infrared spectroscopy, X-ray diffraction, thermogravimetry, and (1P and 13C NMR in the solid state. The amounts of groups grafted onto surfaces were 0.75+/-0.05, 2.35+/-0.14, and 2.48+/-0.18 mmolg(-1) for HApRx (x=1,2,3) surfaces, respectively. Linear correlations between elemental analysis, mass loss, (31)P chemical shift data, and the characteristics of the chain of each alkoxysilane were observed. The organic basic centers distributed onto the external surface have the ability to adsorb divalent copper and cobalt cations from aqueous solution. The degree of adsorption obtained from batchwise processes showed the best performance of these synthesized nanomaterials when compared with the pristine hydroxyapatite.
用有机硅烷衍生物（H3CO）3SiR对羟基磷灰石进行表面硅烷化处理，其中R为相应的有机部分CH2CH2CH2NH2、CH2CH2CH2NHCH2CH2NH2和CH2CH2CH2NHCH2CH2NHCH2CH2NH2，以制备分别命名为HApR1、HApR2和HApR3的有机功能化纳米材料。通过元素分析、红外光谱、X射线衍射、热重分析以及固态的（1P和13C NMR对产物进行了表征。对于HApRx（x = 1,2,3）表面，接枝到表面的基团量分别为0.75±0.05、2.35±0.14和2.48±0.18 mmol g(-1)。观察到元素分析、质量损失、（31）P化学位移数据与每种烷氧基硅烷链的特征之间存在线性相关性。分布在外部表面的有机碱性中心具有从水溶液中吸附二价铜和钴阳离子的能力。与原始羟基磷灰石相比，分批过程获得的吸附程度表明这些合成的纳米材料具有最佳性能。
