Effect of Polyvinylpyrrolidone on Rheology of Aqueous SiC Suspensions Stabilized with Polyacrylic Acid

被引：2

作者：

Xiao, Chunxia ^{[1
]}

Gao, Lei ^{[1
]}

Lu, Mingjing ^{[1
]}

Chen, Han ^{[1
]}

Guo, Lucun ^{[1
]}

机构：

[1] Nanjing Univ Technol, Coll Mat Sci & Engn, Nanjing 210009, Peoples R China

来源：

JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY | 2011年 / 32卷 / 08期

关键词：

Dispersion; PAA; PVP; rheology; SiC; ADSORPTION BEHAVIOR; ALUMINA; MIXTURES; POLY(VINYLPYRROLIDONE); POLYELECTROLYTE; SURFACTANT; DISPERSANT; SLURRIES; SUCROSE;

D O I：

10.1080/01932691.2010.498237

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of polyvinylpyrrolidone (PVP) on rheology of aqueous SiC suspensions stabilized with polyacrylic acid (PAA) was investigated. At pH 6.0, as the total amount of dispersants was fixed at 0.3 wt%, the suspensions with co-addition of PAA and PVP obtained much lower viscosity than those added separately, displaying Newtonian behavior. The improvement in rheology of SiC suspensions arose from enhanced steric hindrance, which was caused by the presence of PVP molecules in association with PAA molecules adsorbed on SiC particle surfaces. However, this effect was relatively weak in alkaline condition because of complete dissociation of PAA.

引用

页码：1145 / 1150

页数：6

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