Effect of Temperature on Carbon-Black Agglomeration in Hydrocarbon Liquid with Adsorbed Dispersant

• DOI: 10.1021/la047906t
• Publication Date: 2005-01-25T05:47:17Z
• Authors: You-Yeon Won; Steve P. Meeker; Veronique Trappe; David A. Weitz; Nancy Z. Diggs; Jacob I. Emert
• Keywords: Agglomerate; Suspension; Carbon fibers

Suspensions of carbon black in oil, stabilized with adsorbed polyisobutylene succinimide (PIBSI) dispersant, are commonly used as model systems for investigating the soot-handling characteristics motor oils. The structure carbon-black agglomerates changes dramatically temperature; this results a concomitant change suspension rheology. Linear and nonlinear rheological experiments indicate large increase interparticle attractions temperature is raised. To elucidate origin behavior, we investigate effect on stabilizing dispersant. Measurements adsorption isotherms dispersant that there little variation binding energy temperature. Intrinsic viscosity measurements PIBSI dispersants solution clearly exhibit an inverse dependence chain dimension These suggest temperature-dependent conformation primarily responsible dispersion rheology, propose simple to account these data.