高度单分散聚乙烯基倍半硅氧烷球形纳米粒子的制备及性能

在水溶液中, 以乙烯基三乙氧基硅烷(VTES)为前驱体, 氨水(NH₃ · H₂O)为催化剂, 在表面活性剂十二烷基苯磺酸钠(SDBS)存在下, 通过溶胶-凝胶法成功合成了具有不同粒径、 高度单分散的聚乙烯基倍半硅氧烷(PVSQ)球形纳米粒子. 研究结果表明, 催化剂NH₃ · H₂O与表面活性剂SDBS的用量对PVSQ的粒径和粒径分布影响很大, 而前驱体VTES的用量对PVSQ的粒径无明显影响. 通过场发射扫描电子显微镜(FESEM)、 傅里叶变换红外光谱(FTIR)、 X射线光电子能谱(XPS)及热重(TG)分析对产物的形貌、 粒径和粒径分布、 结构及热性能进行了表征.

Preparation and Properties of Highly Monodisperse Spherical Poly(vinylsilsesquioxane) Nanoparticles

In aqueous solution, highly monodisperse spherical poly(vinylsilsesquioxane)(PVSQ) particles with various sizes have been prepared successfully in the presence of surfactant sodium dodecyl benzene sulfo-nate(SDBS) using vinyl triethoxysilane(VTES) as precursor and ammonia hydroxide as catalyst by sol-gel method. The research results show that the amounts of catalyst(NH3·H2O) and surfactant(SDBS) have great effects on size and size distribution of PVSQ. However, the amount of precursor(VTES) has unobvious effect on size and size distribution of PVSQ. The shape, size and size distribution, structure, surface property and thermal behavior of the resulting products were analyzed and characterized by field emission scanning electron microscope(FESEM), Fourier transform infrared spectroscopy(FTIR), X-ray photoelectron spectroscopy(XPS) and thermal gravimetric analysis(TGA), respectively.