How do crystal silicon micro powder manufacturers evaluate the surface chemical modification effect of quartz sand powder?

By evaluating the modification effect, the process conditions with better modification effect can be screened.

(1) Activation index

The activation index is an important indicator for measuring the hydrophobic modification effect of quartz sand powder. The larger the activation index, the better the hydrophobic modification effect.

(2) Oil absorption value

Oil absorption value is one of the main direct indicators for the modification of quartz sand powder, especially for quartz sand fillers used in polymer based materials. The oil absorption value of fillers directly affects the processing performance and filling amount of composite materials.

The higher the oil absorption value, the worse the compatibility between the modified product and organic matter, and it also indicates that the modification effect is worse, and vice versa, the better.

(3) Infrared spectroscopy

Infrared spectroscopy can be an important means of detecting whether the surface of quartz sand powder is coated with a modifier. Each functional group or bond has a corresponding characteristic absorption peak in the infrared spectrum. By analyzing the infrared spectrum of quartz sand powder before and after modification and comparing the changes in characteristic peaks, it can be seen whether the modification is effective. This method has been widely used in practice.

(4) Scanning Electron Microscope (SEM)

Scanning the quartz sand powder before and after modification with electron microscopy to observe the surface morphology of the powder, as well as the coating and dispersion changes of the modifier on its surface, directly reflecting the effect of surface coating of the powder modification.