Investigation on Dispersive Behavior of Cu-H2O Nanofluids

摘要

In this paper, by measurement of the zeta potential and hydrodynamic diameter the surface modification and dispersive behavior of Cu nanoparticles in water were investigated under different pH values and different concentration of sodium dodecylbenzenesulfonate (SDBS) dispersant. The experimental results show that the magnitude of zeta potential has very corresponding relation with hydrodynamic diameter, the higher magnitude of zeta potential and the smaller hydrodynamic diameter are, the better dispersion stability of the nano-copper suspensions are. The experimental results also note that SDBS can significantly affect the value of zeta potential and hydrodynamic diameter by electrostatic repulsions, which lead to the enhancement of the stability of the Cu suspensions, and that the optimizing concentration of SDBS is 0.07% for 0.1% copper nano-suspensions which has the best disperse results.