Electrokinetic Stability and Size Modeling of Discharge Product Particles
DOI:
https://doi.org/10.22353/physics.v37i608.10503Keywords:
carbon discharge product, zeta potential, infiltration, size distribution, colloidal stabilityAbstract
This study characterizes the colloidal stability and aggregation behavior of carbon discharge product particles synthesized via arc discharge. The Zeta potential distribution was successfully modeled as a mixture of two normal distributions with mean values of 50.02 mV and 18.74 mV. These results indicate that although the suspension is electrostatically stabilized by a predominant net positive charge, it possesses significant charge heterogeneity. The particle size distribution was modeled using the Fréchet distribution, identifying a baseline mode of approximately 2.7 um in the non-sonicated state. Experimental analysis revealed that sonication triggers stress-induced aggregation rather than dispersion, increasing the mode to 4.0 um and the mean particle size toward 10 um due to the disruption of the stabilizing electrical double layer. These findings suggest that the material is dimensionally suitable for infiltrating fibrous substrates in composites, but the fabrication process must employ low-energy techniques to prevent undesirable agglomeration and maintain optimal dispersion.
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