PROCESS FOR SYNTHESIZING HYDROPHOBIC SILICON DIOXIDE NANOPARTICLES BY COMBUSTION

摘要

Disclosed is a process for synthesizing hydrophobic silicon dioxide nanoparticles by combustion, and the process comprises the steps of: 1)heating an organosilicon precursor until the organosilicon precursor enters a burner in a gas form and maintaining a constant temperature; 2)introducing a fuel gas, an auxiliary combustion gas, a carrier gas and a branch gas into the burner and igniting the same, wherein the flow ratio of the fuel gas, the auxiliary combustion gas, the carrier gas and the branch gas is 1 : 0.4-10 : 0.2-5 : 0.24-30; and 3)collecting the hydrophobic silicon dioxide nanoparticles. The process is an in situ synthesis method. Only one step is needed to convert to the hydrophobic silicon dioxide nanoparticles from the precursor in the preparation procedure. The process is easy and has a high yield, and the hydrophobic silicon dioxide nanoparticles obtained have a high purity, are homogeneous particles and have good hydrophobicity.