高级检索
无机材料学报

无机材料学报

• 研究论文 • 上一篇    下一篇

吸附途径对α-Al2O3-H2O-PAA悬浮液流变性影响

李登好1,2; 郭露村1   

  1. 1. 南京工业大学材料科学与工程学院 南京 210009; 2. 淮阴工学院, 淮阴 223001
  • 收稿日期:2003-07-08 修回日期:2003-10-08 出版日期:2004-07-20 网络出版日期:2004-07-20

Effect of Adsorption Processes on the Rheology of A12O3-H2O-PAA Suspensions

LI Deng-Hao1,2; GUO Lu-Cun1   

  1. 1.College of Materials Science and Engineering; Nanjing University of Technology; Nanjing 210009; China; 2.Huaiyin Institute of Technology; Huaiyin 223001; China
  • Received:2003-07-08 Revised:2003-10-08 Published:2004-07-20 Online:2004-07-20

PDF (PC)

1228

摘要： 采用两阶段吸附法(两个pH不同的阶段)研究了不同吸附途径制备的浆料的稳定性。结果表明,pH值为6.5的浆料,经过pH值高于粉体等电点阶段的吸附,浆料的稳定性显著提高。第一吸附阶段的pH值对浆料的稳定性有很大的影响,其pH从8.0提高到10.0,浆料的粘度降低,稳定性提高,但当pH值增加到11.0时,浆料的稳定性则下降。增加第一阶段的吸附时间,有利于改善PAA在粒子表面的分布状态和提高浆料的稳定性。

关键词: 聚丙烯酸（PAA）, 氧化铝, 吸附途径, 流变性

Abstract: The rheological behaviors of α-Al2O3-H2O-PAA suspensions prepared by two-stage adsorption
(at two different pH values) were studied. The results show that the stability of the suspension with a final pH 6.5 is improved considerably if it experiences
an adsorption stage at pH above the iep of the alumina. The pH values of the first adsorption stage have a great impact on the stability of slurries. When the
pH value increases from 8.0 to 10.0, the viscosity of the slurry decreases and the stability is enhanced. But when the pH reaches 11.0, the viscosity
of the slurry increases and the stability declines. Increasing the time of the first adsorption stage is helpful to the stabilization of suspensions,
due to improved homogeneity of the distribution of PAA on the particle surfaces.

Key words: PAA, α-Al2O3, suspension, adsorption-route, rheology

中图分类号: