Presentation Information
[9p-E203-1]Comparative Analysis of Surfactant Adsorption on Particle Surfaces During Dispersion
〇Haruhisa Kato1, Ayako Nakamura1 (1.AIST)
Keywords:
PFG-NMR,nanomaterial,dispersant
Accurate particle characterization requires effective dispersion of aggregates and agglomerates. Particle dispersion is a critical pretreatment step for techniques such as dynamic light scattering (DLS), particle tracking analysis (PTA), asymmetric flow field-flow fractionation (AF4), and electron microscopy. However, measurement results are often affected by dispersing methods and surfactant selection.
In this study, aqueous particle suspensions were prepared by ultrasonication and jet milling using several industrial surfactants. DLS and AF4 analyses showed that particle size and size distribution depended on both dispersing method and surfactant type. PFG-NMR revealed that dispersing methods influenced surfactant adsorption on particle surfaces, affecting deagglomeration efficiency and dispersion stability. In particular, jet milling promoted surfactant adsorption and aggregate breakup. These results provide insight into dispersion mechanisms and support the optimization of particle characterization procedures.
In this study, aqueous particle suspensions were prepared by ultrasonication and jet milling using several industrial surfactants. DLS and AF4 analyses showed that particle size and size distribution depended on both dispersing method and surfactant type. PFG-NMR revealed that dispersing methods influenced surfactant adsorption on particle surfaces, affecting deagglomeration efficiency and dispersion stability. In particular, jet milling promoted surfactant adsorption and aggregate breakup. These results provide insight into dispersion mechanisms and support the optimization of particle characterization procedures.