Study of technology for powder surface modification by turbulent air and adsorption mechanism of silane coupling agent

The technology for powder surface modification by turbulent air was investigated by modifying the quartz powder, and Fourier transform infrared spectroscopy (FTIR) was used to study the changes of the quartz powder before and after surface modification. In order to study the adsorption mechanism of silane coupling agent, quartz substrate was used for silane deposition. The surface topography and the wettability of silane-treated substrate were investigated by atomic force microscopy (AFM) and static water contact angle measurement techniques. With increasing the time of adsorption, the surface of the silane-treated substrate become rougher and the static water contact angle of the silane-treated substrate increases firstly and then remains stable. The character of the substrate surface is changed from a hydrophilic one to a hydrophobic one after silane adsorption.