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Citation: Zhao Zhenguo, Qian Cheng, Wang Qing, Liu Yingqing. Effect of Adsorption of Surfactants and Polyvinylpyrrolidone on the Stability of ZrO₂ Suspension[J]. Chinese Journal of Applied Chemistry, ;1998, 15(6): 6-10. shu

Effect of Adsorption of Surfactants and Polyvinylpyrrolidone on the Stability of ZrO₂ Suspension

Department of Chemistry, Peking University, Beijing 100871

Received Date: 30 March 1998
Revised Date: 10 August 1998

The adsorption of sodium dodecylbenzene sulfonate(SDBS), tetradecyl pyridine bromide(TPB) and polyvinyl pyrrolidone(PVP) onto the ZrO₂ particles in aqueous solutions and the effect of the adsorption on the stability of ZrO₂ suspension have been studied. The results show that the isotherms are of LS type for SDBS at pH₂.4 and of S type for TPB at pH 7.0, respectively. The adsorption isotherms for both surfactants are roughly identical with potential changecurves of ZrO₂ particles:at maximum adsorption ZrO₂ has greater potential value and the adsorbed surfactant ions form surface micells with more parts of their hydrophilic groups being towards water phase, increasing the stability of ZrO₂ suspension. The amount of PVP adsorbed on the positively charged ZrO₂ is greater than that on the negatively charged ZrO₂. In concentrated PVP solution the ZrO₂ suspension has higher stability.
- sodium dodecylbenzene sulfonate,
- tetradecylpyridine bromide,
- polyvinylpyrrolidone,
- ZrO₂,
- adsorption,
- suspension stability
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Effect of Adsorption of Surfactants and Polyvinylpyrrolidone on the Stability of ZrO₂ Suspension