Nano Haloing in Stabilization of Colloidal Microspheres

فاقد چكيده

Nanoparticle haloing is a novel mechanism that can create a stable colloidal suspension with high efficiency as compared to conventional methods. In present study we investigated the effect of titania nanoparticles on stabilization of larger alumina colloidal particles. For this purpose, we employed turbidity measurement and sedimentation tests to determine the optimum pH and nanoparticle weight fraction that can lead to a stabilized system. By increasing the nanoparticle concentration, the stability of these bidispersed systems reaches an optimum condition. However further increasing results in reduction of the colloidal suspension stability. The results showed that the optimum pH and titania weight fraction is 11 and 1wt%, respectively.