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Journal of Dispersion Science and Technology Volume 24, 2003 - Issue 5
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Original Articles

Surface and Rheology Characterization of NH4PAA‐Stabilized Nanosized TiO2 Suspensions

Yuan‐chang Shi College of Materials Science and Engineering, Shandong University, Jinan, 250061, P.R. ChinaCorrespondence[email protected]
,
You‐shi Wu College of Materials Science and Engineering, Shandong University, Jinan, 250061, P.R. China
,
Jing‐guo Li College of Materials Science and Engineering, Shandong University, Jinan, 250061, P.R. China
&
Gan‐zuo Li Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, Shandong University, Jinan, P.R. China
Pages 739-743 | Received 06 Nov 2002, Accepted 07 Apr 2003, Published online: 06 Feb 2007
 
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Abstract

The role of ammonium polyacrylate (NH4PAA) in the dispersion of nanosized titanium dioxide (TiO2) was investigated experimentally. The adsorption of NH4PAA onto TiO2 has been studied as a function of pH. The adsorption amount of NH4PAA was found to decrease with increasing pH. With increasing NH4PAA concentration, the isoelectric point for nanosized TiO2 particles shifts from pH 5.9 to 2.7. The addition of NH4PAA leads to a lower viscosity in highly concentrated suspensions, and the rheological behavior of the TiO2 suspensions is strongly dependent on the amount of NH4PAA adsorbed.

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