Polyethylene Glycol Adsorption Behavior on Nanoparticulate TiO2 and Its Stability in Aqueous Dispersions

Abstract

Abstract: Nano-sized TiO₂ particles with anatase structure were synthesized by hydrolysis of titanium tetrachloride. The adsorption of polyethylene glycol (PEG) on to the particle surfaces was investigated in aqueous
suspensions. Infrared adsorption spectra and adsorption experimental results indicated the adsorption behavior was related to PEG concentration, pH, molecular weight and crystalline size. The measured
surface charge and Zeta potential of TiO₂ particles varied distinctly after PEG adsorption. The changes of the absorbances and TEM analysis showed that the adsorption of PEG onto the surface
of nano particles provided a high degree of steric stabilization and remarkably improved the stability of as-formed suspension against flocculation in water. While supersaturated adsorptions of PEG inversely
destroyed the stability of the dispersion of nano-sized TiO₂ particles.

Key words: titanium dioxide nanoparticles, polyethylene glycol, adsorption, stability

CLC Number:

O648

LIUFU Sheng-Cong,XIAO Han-Ning,LI Yu-Ping,HU Zhi-Rong. Polyethylene Glycol Adsorption Behavior on Nanoparticulate TiO₂ and Its Stability in Aqueous Dispersions[J]. Journal of Inorganic Materials.

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Polyethylene Glycol Adsorption Behavior on Nanoparticulate TiO₂ and Its Stability in Aqueous Dispersions

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