Effect of polyvinylpyrrolidone on rheology of aqueous SiC suspensions dispersed with poly(aspartic acid)

Chunxia Xiao, Qing Ni, Han Chen, Lucun Guo

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

Poly(aspartic acid) (PASP) as environmental friendly and biodegradable polymer has been considered to replace polyacrylic acid (PAA) for years. In this work, effect of polyvinylpyrrolidone (PVP) on the rheological properties on aqueous SiC suspensions dispersed with PASP was investigated. PASP (0.3. wt%) and PVP (0.1. wt%) co-stabilized suspensions at different pH and solid loadings can achieve better dispersion at lower dosages of dispersants than those with only PASP (0.7. wt%). The complex of anionic PASP molecules and nonionic PVP molecules through intermolecular hydrogen bonding provided enhanced steric hindrance, and resulted in improved stability.

Original languageEnglish
Pages (from-to)108-111
Number of pages4
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume399
DOIs
StatePublished - 5 Apr 2012

Keywords

  • Biodegradable
  • PASP
  • PVP
  • Rheology
  • SiC

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