Bileşik halkalı bazı organik tozların statik elektriklenmesi

The mechanism of static charge accumulation on the insulating surfaces via contact and the following charge dissipation has remained poorly understood since ancient times. Since many industries suffer from static electrification during product production, handling, and usage, scientists are trying to decipher the charging mechanisms, charge transfer modes, and any contributing factors. However, quantifying materials based on their tendency to accept or donate electrons upon contact has often proved challenging. The result is contradictory, irreproducible findings, especially with insulating powders. In this study, our objective was to provide a more comprehensive perspective on determining whether the chemical structure is a deciding factor in the triboelectrification of insulating powders. In this regard, we focus on common aromatic powders to see how variations in the number and spatial arrangement of aromatic rings affect the charging behavior. In addition, we study the impact of the type, number, and positioning of functional groups (FG) on the triboelectrification of these powders. Powders were charged by grinding in an agate mortar with steel and agate pestles. The electric potential developed in the powder was then measured by an electrostatic voltmeter. Some consistent trends then emerged: the sign and magnitude of the electrostatic potential seemed to be related to the number of fused aromatic rings. Also, compounds having a nitro or carboxyl functional group were charged negatively, while a methyl FG resulted in the accumulation of positive electrostatic potential. Positional isomers demonstrated different electrification behavior as well. The effect of particle morphology was also investigated by analyzing the powders by SEM and XRD. Our results contribute to the fundamental physical and chemical understanding of powder charging. Finally, this work presents an initiative for a general approach based on these fundamentals to prevent powder charging and related problems in the industry.