Aqueous carbon black dispersions stabilized by sodium lignosulfonates

Abstract Six different sodium lignosulfonates with varying degrees of sulfonation (0.14–1.29 sulfonate groups per phenylpropane unit) and molecular weights ( M w = 6000–330,000 g/mol) were evaluated for their ability to disperse carbon black in aqueous media. Rheological particle size measurements dispersions indicated that low degree function as good dispersants. The dispersion efficiency did not correspond directly the amount lignosulfonate adsorbed on surface black. have an enhance colloidal stability by electrostatic repulsion, likely mechanism stabilization is a combination repulsion steric hindrance. Graphical abstract