摘要
在分散体系中 ,两种功能性硅烷 ,甲基丙烯酰氧丙基三甲基硅烷 (MPTES)和氨丙基三甲基硅烷 (APTES)在纳米氧化硅表面形成自组装单分子层 ,用XPS和FTIR对所得自组装单分子层进行了表征 .元素分析结果表明 ,所得功能性纳米氧化硅中的功能基含量分别为 1.0 3mmol/g甲基丙烯酰氧基 /丙烯酰氧丙基纳米氧化硅 (MPSN)和 3.34mmol/g氨基 /氨丙基纳米氧化硅 (APSN) .LSS分析结果表明 ,未修饰纳米氧化硅、MPSN和APSN在甲苯分散体系中的平均流体力学直径大约分别为 2 4 0、4 5和 5 6 0nm .
Two functional silanes, gamma-methacryloxypropyltriethoxysilane (MPTES) and gamma-aminopropyltriethoxysilane (APTES), has been self-assembled onto the surface of silica nanoparticles in the dispersion system. The modifications of the ultra-fine particles were investigated via elemental analyses, XPS, FTIR and TGA. The elemental analysis showed that the amounts of the immobilized agents were 3.34 mmol/g and 1.03 mmol/g on the surfaces of gamma-methacryloxypropyl-modified silica nanoparticles (MPSN) and gamma-aminopropyl-modified silica nanoparticles (APSN), respectively. The mean hydrodynamical particle diameters of the bare silica nanoparticles, MPSN and APSN, determined by the laser scattering system (LSS), were about 240, 45 and 560 nm, dispersed in toluene, respectively.
基金
ProjectsupportedbytheDSFCofLanzhouUniversity (2 0 0 1)andtheK .C .WongEducationFoundation,HongKong (2 0 0 1)
