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Updated: Jul 9, 2026

Dispersion of Nanomaterials in Aqueous Media: Towards Protocol Optimization
Published on: December 25, 2017
Measurement of dispersion stability of surface-modified nanosized carbon black in various liquids
Heang Sin Jang1, Dong-Wha Park, Sang Eun Shim
1Department of Chemical Engineering, Regional Innovation Center of Environmental Technology of Thermal Plasma, Inha University, Incheon 402-751, Korea.
Abstract:
The dispersion stability of nano-sized carbon black produced by a thermal plasma process was investigated using a novel multiple light scattering method. The effect of surface modification of carbon black on the dispersion stability was monitored in various polar and non-polar liquids including water, methanol, styrene, and toluene. The results show that carbon black functionalized with carboxylic anion groups has much improved colloidal stability in a polar solvent and the degree of dispersion stability is strongly related to the solubility parameter value of liquids. In addition, the carbon black with carboxylic anions has a long-term stability without any auxiliary dispersion agent such as a surfactant due to electrostatic repulsion.
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