Surface Modification of Nano-Copper and its Dispersive Behavior in Water

Abstract

In this paper, by measurement of zeta potential and particle size the surface modification of Cu nanoparticles in water was investigated at different pH values and different concentration of sodium dodecylbenzenesulfonate (SDBS) dispersant. The results show that the absolute value of zeta potential has very corresponding relation with particle size, and that the higher the absolute value of zeta potential and the smaller of the particle size are, the better dispersion and stability of copper nano-suspensions system is. It is also found that SDBS can significantly affect the value of zeta potential and particle size by electrostatic repulsions, which lead to the enhancement of the stability of the Cu suspensions, and the optimizing concentration for SDBS in 0.1% copper nano-suspensions is 0.07%, which have the best disperse results.

Dosage Determination of Aluminate Coupling Agent Modifying Nano-Calcium Carbonate

“…When time variation is from 12 hours to 72 hours, the settlement volume changes little. All of these suggested that wettability and dispersion of modified nano-CaCO 3 in liquid paraffin have been stable and improving [7,8].…”