| 聚丙烯酸铵吸附对TiO2悬浮液稳定及流变性的影响 |
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| 引用本文： | 吕伟,吴佑实,石元昌,李景国.聚丙烯酸铵吸附对TiO2悬浮液稳定及流变性的影响[J].山东大学学报(工学版),2003,33(4):353-356. |
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| 作者姓名： | 吕伟 吴佑实 石元昌 李景国 |
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| 作者单位： | 1. 山东大学,威海分校,山东,威海,264200
2. 山东大学材料科学与工程学院,山东,济南,260061 |
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| 摘 要： | 研究了NH4 PAA在纳米TiO2 悬浮液中的作用 .对NH4 PAA在TiO2 表面的吸附进行了探讨 .结果表明 ,NH4 PAA的吸附量随pH值的增大而减小 .随NH4 PAA添加量的增加 ,纳米TiO2 粉体的等电点由pH =5 .9移动到pH =2 .7处 .高浓度TiO2 悬浮液的流变性能与NH4 PAA的加入量有关 ,加入NH4 PAA可降低悬浮液的粘度 .选择适当的NH4 PAA的添加量与pH值范围可有效改善悬浮液的稳定性和流变性 .
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| 关 键 词： | 纳米TiO2 聚丙烯酸铵 表面性质 定量吸附 流变性能 |
| 文章编号： | 1672-3961(2003)04-0353-04 |
| 修稿时间： | 2002年10月21 |
Effect of NH4PAA adsorption on stability and rheology of TiO2 suspension |
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| Abstract: | The role of ammonium polyacrylate (NH 4PAA) in the dispersion of nanosized TiO 2 is investigated experimentally. The adsorption of NH 4PAA onto TiO 2 has been studied as a function of pH. The adsorption amount of NH 4PAA is found to decrease with an increase of pH. With the increase of NH 4PAA concentration, the isoelectric point for nanosized TiO 2 shifts from pH 5.9 to pH 2.7. The addition of NH 4PAA leads to a lower viscosity of high concentrated suspensions, and the rheological behavior of nano TiO 2 suspensions is strongly dependent on the amount of NH 4PAA. It turned out that an effective improvement of the stable and rheological properties of the solid suspensions investigated depends on definite amounts of NH 4PAA and definite pH ranges as well. |
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| Keywords: | nano size TiO 2 ammonium polyacrylate(NH 4PAA) surface properties quantitative adsorption rheology |
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