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Research on Dispersion Behavior of Ultrafine TiO_2 Particles in Aqueous Solution

Yun Chen

Abstract

The sedimentation method is used to determine the effects of dispersant on the dispersion of ultrafine TiO2 particles in aqueous solution. The results show that SDS?TPB?sodium polyacrylate are effective dispersants for TiO2 particles in aqueous solution. The dispersion mechanism is analysed by testing Zeta potential and the viscosity of the suspensions. SDS?TPB?sodium polyacrylate can significantly increase the absolute value of Zeta potential, and ethylene glycol can form a good solvent layer on the particle surfaces. This lead to the enhancement of the stability of the TiO2 suspensions.

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Key concepts: Dispersant, Sodium polyacrylate, Zeta potential, Aqueous solution, Materials science, Dispersion (optics), Chemical engineering, Ethylene glycol