Measurement of dispersion stability of surface-modified nanosized carbon black in various liquids.
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.
Department of Chemical Engineering, Regional Innovation Center of Environmental Technology of Thermal Plasma, Inha University, Incheon 402-751, Korea.
Heang Sin
HS
Jang
Dong-Wha
DW
Park
Sang Eun
SE
Shim
D003102:Colloids / Q000737:chemistry*; D003460:Crystallization / Q000379:methods*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D009391:Nephelometry and Turbidimetry; D010316:Particle Size; D012996:Solutions; D012997:Solvents / Q000737:chemistry*; D053260:Soot / Q000737:chemistry*; D013499:Surface Properties
D003102:Colloids; D046911:Macromolecular Substances; D012996:Solutions; D012997:Solvents; D053260:Soot