Controlling the Hydrophobicity of Submicrometer Silica Spheres via Surface Modification for Nanocomposite Applications

摘要: We control the hydrophobicity of submicrometer silica spheres by modifying their surface with −CH3, −CHCH2, −(CH2)2CH3, −CH2(CH2)4CH2−, −C6H5, −(CH2)7CH3, and −(CH2)11CH3 groups through a modified one-step process. The scanning electron microscopy (SEM), quasi-elastic light scattering (QELS), UV−visible spectra, nitrogen sorption, water vapor adsorption methods are used to characterize particles. SEM micrographs particles demonstrate that uniformly spherical, monodisperse, well-shaped particle size ranging from 130 149 nm depending on organic groups. In aqueous solution, phenyl have an obvious UV absorption peak at around 210 nm, whereas other unmodified do not any peaks. There exist differences in amount adsorbed type functional Compared the...