The stabilization of nano‐sized CuO suspensions was examined to look for the primary mechanism of dispersion. The dispersion stability of suspension was characterized by sedimentation tests, Zeta potential, granularity tests, and infrared spectroscopy (IR). Influence factors such as pH and the concentration of the dispersant on the colloidal stability of the suspension were investigated. The results showed that sodium polyacrylate was fit to stabilize the suspension of CuO nanoparticles through electrosteric repulsion. Also, smaller viscosity and better dispersion effects were achieved when sodium polyacrylate mass fraction was 0.4%∼0.8% (based on the powder), pH was 10.
Effect of Dispersant on the Colloidal Stability of Nano‐sized CuO Suspension
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